ASC-50 Operation Manual ASC-50 OPERATION MANUAL September 2001 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual TABLE OF CONTENTS 1. ASC-50 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2. Available types of filter transfer functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3. Description of front panel controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4. Using the ASC-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 5. Definition of terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 6. Sample rate control explanation and Chart 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 7. Operational Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 8. ASC-50 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 9. Power and fuzing instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 10. Theory of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 11. IIR transfer function curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 12. FIR transfer function curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 I 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual The ASC-50 is a self-contained signal conditioning filter/amplifier instrument that combines Analog and Digital Signal Processing (DSP) capabilities while providing conventional analog signal input and output. Analog and DSP functions are available without the need for computer programming while familiar analog instrument operation is maintained. Data entry is accomplished via a “soft front panel” and a two line Liquid Crystal Display (LCD) that prompts the user to select among various menu choices. Features Wide variety of filter types, functions and frequencies Precise, stable filter performance Adjustable gain and attenuation DC offset control Choice of single or differential inputs Special DSP bypass Analog and DSP clip indicators Filter performance display Filter Types Low-pass High-pass Band-pass Band-reject (LP) (HP) (BP) (BR) Filter Functions Butterworth Chebyshev Elliptic-60dB Elliptic-80dB FIR-40dB FIR-60dB FIR-80dB (Buttr) (Cheby) (Ell60) (Ell80) (FIR40) (FIR60) (FIR80) Gain Control PRE - Analog pre-gain range 0 to +36dB in 6dB steps POST - Digital post-gain range -48dB to +42dB in 6dB steps DC Offset Control - Input DC offset range ±5 Volts Over-Range Indication ← CLIP) Analog saturation, clipping detection (← Digital saturation, clipping detection (CLIP →) 1 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual Available Low-Pass, High-Pass Transfer Functions ANALOG Butterworth Chebychev (0.1dB Ripple) Elliptic-60 dB (0.1dB Ripple) Elliptic-80 dB (0.1dB Ripple) DIGITAL FIR-40 dB FIR-60 dB FIR-80 dB 4,6,8,10 4,6,8,10 4,6,8,10 4,6,8,10 Pole Pole Pole Pole Band-Pass, Band-Reject Transfer Functions ANALOG Butterworth Chebychev Elliptic-60 dB (0.1dB Ripple) Elliptic-80 dB (0.1dB Ripple) DIGITAL FIR-40 dB FIR-60 dB FIR-80 dB 3,4 3,4 3,4 3,4 Pole-Pair Pole-Pair Pole-Pair Pole-Pair Q Q Q Q = = = = 2,5,10,20 2,5,10,20 2,5,10,20 2,5,10,20 BW1,BW2,BW3,BW4 BW1,BW2,BW3,BW4 BW1,BW2,BW3,BW4 LOCATION OF FRONT PANEL CONTROLS AND TERMINATIONS ASC50 BYP RESET ENTER MODE O U T I N 2 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual Power-On/Off A two-position toggle switch located on the rear panel turns the AC power on and off. Upon power-on, the front panel will display MODE 1 of the set-up present at the time power was turned off. A. Mode Key Many more functions are controlled than could be displayed on one screen. Four modes of operation are utilized. Each press of the MODE key displays a different mode (1 through 4). Four consecutive presses of the MODE key will return the display to the initial mode. B. Enter Key In order to load the filter chosen via the arrow keys, it is necessary to press the Enter key. Until this is done the present filter is still operating. This allows the operator to spool through the available choices before making a selection. When in MODE 1, to warn the user that a new filter selection has not yet been made operational, the Warning: <ENT> flashes. It is extinguished by pressing the ENTER key which loads the selected filter. C. Arrow Keys ←, →, ↑, ↓) keypads are available to highlight fields and make selections. The left ← and right Four arrow (← → arrows allow movement within fields and are used to select the field to be modified. Continuous looping through all the fields will occur as the left ← or right → arrow key is repeatedly pressed. The up ↑ and down ↓ arrows cycle between the various choices available in each field. Changes that require use of the ENTER key are indicated by the flashing <ENT> symbol (MODE 1 only). D. Reset Key During the filter selection process and before pressing Enter or while the warning <ENT> flashes, the user can return the display to the current active filter mode by pressing RESET. E. Bypass Key The internal DSP filter can be bypassed by pressing the BYP key. This will bypass the DSP filter, but not the input anti-alias (AA) and output reconstruction (RC) filters. The BYP key toggles between the active and bypass modes (denoted ACT and BYP on the display) and always returns the display to MODE 1. This permits the operator to monitor the effects of the DSP filter. F. Input Connectors Two shielded, female BNC input (+IN and -IN) connectors are present on the front panel. An input signal connected to the +IN provides single-ended input. To operate in the differential input mode, differential input signals must be connected to the +IN and -IN connectors. The -IN connector is only used for the differential input-operating mode. G. Output Connector One shielded female BNC output connector is present on the front panel. H. LCD Display A two-line display indicates the setup choices available as well as providing the user selected characteristics. Fields that are controllable are presented to the display for viewing (a flashing cursor within a field indicates the specific parameter that can be modified by utilizing the arrow keys). Selected performance characteristics are also identified. A Menu Options chart is included (see Attachment 1) to indicate how selections are ←, →, ↑, ↓) and Enter Keys. made within modes and fields. . User choices are made via the arrow (← 3 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual USING THE ASC-50 User Interface User entry is accomplished by means of a “soft front panel” with the user entry prompted by the display. Left ← and Right → Arrows - place the blinking cursor on the function that is to be changed. Up ↑ and Down ↓ Arrows - make changes to the current setup. <ENT> - In MODE 1 a blinking <ENT> on the display reminds the user that new functions are not implemented until the ENTER button is pressed. MODE - selects which menu is displayed. MODE makes no changes to the current setup. By repeatedly pressing MODE the entire setup can be reviewed without making any changes. ENTER - implements the selected setup. BYP - provides a special DSP bypass operation, its use is signaled on the display. RESET - allows the previous setup to be restored. Flashing Cursor A Flashing Cursor indicates which field is awaiting update. DISPLAY MODES Three display modes register the complete range of operational choices; the fourth mode provides filter characteristics. Pressing the MODE key a maximum of three times will display the modes in succession. The fourth time MODE is pressed the original display is returned. 4 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual Mode 1 Field 1 - Filter type A. LP (Low-pass) B. HP (High-pass) C. BP (Band-pass) D. BR (Band-reject) Field 2 - Filter function A. Buttr (Butterworth) B. Cheby (Chebyshev) C. Ell60 (Elliptic-60dB) D. Ell80 (Elliptic-80dB) E. FIR40 (Finite Impulse Response 40dB) F. FIR60 (Finite Impulse Response 60dB) G. FIR80 (Finite Impulse Response 80dB) Field 3 - Number of Poles (Does not apply for FIR filters A. 4P (4 Pole) B. 6P (6 Pole) C. 8P (8 Pole) D. 10P (10 Pole) E. 3PP (3 Pole Pair) F. 4PP (4 Pole Pair) Field 4 - Q/Bandwidth A. Q2 (Q=2) Does not apply to FIR40, FIR60, FIR80 B. Q5 (Q=5) Does not apply to FIR40, FIR60, FIR80 C. Q10 (Q=10) Does not apply to FIR40, FIR60, FIR80 D. Q20 (Q=20) Does not apply to FIR40, FIR60, FIR80 E. BW1 (FIR BW #1) Does not apply to Buttr, Cheby, Ell60, Ell80 F. BW2 (FIR BW #2) Does not apply to Buttr, Cheby, Ell60, Ell80 G. BW3 (FIR BW #3) Does not apply to Buttr, Cheby, Ell60, Ell80 H. BW4 (FIR BW #4) Does not apply to Buttr, Cheby, Ell60, Ell80 Field 5 – Active/Bypass A. Active mode (ACT) B. DSP Bypass mode (BYP) Field 6 – Corner Frequency A. 0.10 Hz - 0.99 Hz (0.01 Hz Steps) B. 1 Hz - 9.9 Hz (0.1 Hz Steps) C. 10 Hz - 99 Hz (1 Hz Steps) D. 100 Hz - 990 Hz (10 Hz Steps) E. 1,000 Hz - 9,900 Hz (100 Hz Steps) F. 10,000 Hz - 30,000 Hz (1000 Hz Steps) Mode 2 Field 1 - Analog Pre-gain Control A. Pre-gain ( 0dB to +36dB) Field 2 - DSP Post-gain Control A. Post-gain (-48dB to +42dB) Mode 3 Field 1 - Single / Differential Input Control A. SNG (Single Ended Input) B. DIF (Differential Mode Input) Field 2 - Input DC Offset Control, relative DC offset A. ±5V range in ⊃0.15mV steps Mode 4 Field 1 - Filter Performance, Shape Factor/Transition Band A. Shape Factor - Shape Factor Ratio B. Trans BW-Transition Bandwidth (Hz) C. Pass BW-Pass-band Bandwidth (Hz) D. Stop BW-Stop-band bandwidth (Hz) E. Warning - 1, 2, 3 Field 2 – Stop-band Bandwidth A. BW (Hz) 5 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual Filter performance characteristics presented to the display are not available for change but rather indicate relative performance of the various filters (See Attachment 2 for plots of the available filter transfer functions). Shape Factor (SF) Used for analog filters to indicate the ratio of corner frequency of the filter to attenuation floor frequency. In the case of Butterworth (Buttr) and Chebychev (Cheby) filters an attenuation level of 80dB is assumed. Band-pass (BP) and Band-reject (BR) filters exhibit the same attenuation slope on both the upper and lower sides of the response (symmetric). Transition Bandwidth (Trans BW) Low-pass (LP) and high-pass (HP) digital filters are labeled with a bandwidth (Hz) that expresses the difference between the attenuation floor frequency and the upper (LP) or lower (HP) limit of the pass-band frequency. Pass-band Bandwidth (Pass BW) Band-pass (BP) and Band-reject (BR) digital FIR filters are labeled with a bandwidth (Hz) that expresses the difference between the two pass-band frequencies. The band-pass (BP) passes frequencies over the range (Fc ± BW/2). The band-reject (BR) passes frequencies outside the range (Fc ± BW/2). Stop-band Bandwidth (Stop BW) Band-pass (BP) and band-reject (BR) digital FIR filters are labeled with a bandwidth (Hz) that expresses the difference between the two stop-band frequencies. The band-pass (BP) filter rejects frequencies outside of the range (Fc ± BW/2). The band-reject (BR) rejects frequencies over the range (Fc ± BW/2). WARNING MESSAGES Warning Messages indicate that a filter is operating outside of normal limits. Warning 1 - HP FIR (Attenuation @ DC) This message is displayed when the selected FIR high-pass filter is unable to achieve the desired level of attenuation at a frequency of 0 Hz (DC). Warning 2 - BP FIR (Attenuation @ DC) This message is displayed when the selected FIR band-pass filter is unable to achieve the desired level of attenuation at a frequency of 0 Hz (DC). Warning 3 - BR FIR (Attenuation @ DC) This message is displayed when the selected FIR band-reject filter is unable to achieve the desired level of attenuation at a frequency of 0 Hz (DC). 6 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual Sampling Rate Control The maximum bandwidth of any DSP system is limited to less than one-half of the sampling frequency. In the case of the ASC-50 the maximum bandwidth is one-quarter of the sampling frequency. In order to provide the highest performance from the available bandwidth the ASC-50 provides an automatic-sampling rate selection control. A sampling frequency between 36Hz and 150kHz is chosen depending on the filter type, function and frequency (See CHART 1 below). Filter Function LP,HP BP,BR LP,HP BP,BR LP,HP BP,BR LP,HP BP,BR LP,HP BP,BR LP,HP BP,BR LP,HP BP,BR LP,HP BP,BR LP,HP BP,BR LP,HP BP,BR LP,HP LP,HP BP,BR BP,BR LP,HP LP,HP BP,BR BP,BR LP,HP LP,HP BP,BR BP,BR Filter Type Analog/Digital Analog/Digital Analog/Digital Analog/Digital Analog/Digital Analog/Digital Analog/Digital Analog/Digital Analog/Digital Analog/Digital Analog/Digital Analog/Digital Analog/Digital Analog/Digital Analog/Digital Analog/Digital Analog/Digital Analog/Digital Analog/Digital Analog/Digital Analog Digital Analog Digital Analog Digital Analog Digital Analog Digital Analog Digital Corner Frequency Fc < 0.735 Hz Fc < 1.47 Hz 1.47 Hz > Fc >= 0.735 Hz 2.94 Hz > Fc >= 1.47 Hz 2.94 Hz > Fc >= 1.47 Hz 5.88 Hz > Fc >= 2.94 Hz 5.88 Hz > Fc >= 2.94 Hz 11.76 Hz > Fc >= 5.88 Hz 11.76 Hz > Fc >= 5.88 Hz 23.53 Hz > Fc >= 11.76 Hz 23.53 Hz > Fc >= 11.76 Hz 47.06 Hz > Fc >= 23.53 Hz 47.06 Hz > Fc >= 23.53 Hz 94.12 Hz > Fc >= 47.06 Hz 94.12 Hz > Fc > = 47.06 Hz 188.25 Hz > Fc >= 94.12 Hz 188.25 Hz > Fc >=94.12 Hz 376.50 Hz > Fc >= 188.25 Hz 376.50 Hz > Fc >= 188.25 Hz 753.00 Hz > Fc >= 376.50 Hz 753.00 Hz > Fc>= 376.50 Hz 1.506 kHz > Fc >= 376.50 Hz 1.506 kHz > Fc >= 753.00 Hz 3.012 kHz > Fc>= 753.00 Hz 1.506 kHz > Fc >= 753.00 Hz 6.024 kHz > Fc >= 1.506 kHz 3.012 kHz > Fc >= 1.506 kHz 12.048 kHz > Fc >= 3.012 kHz 30.000 kHz > Fc >= 1.506 kHz 30.000 kHz > Fc >= 6.024 kHz 30.000 kHz > Fc >= 3.012 kHz 30.000 kHz > Fc >= 12.048 kHz Sample Frequency 36.7 Hz 36.7 Hz 73.5 Hz 73.5 Hz 147.1 Hz 147.1 Hz 294.1 Hz 294.1 Hz 588.3 Hz 588.3 Hz 1.17 kHz 1.17 kHz 2.35 kHz 2.35 kHz 4.71 kHz 4.71 kHz 9.41 kHz 9.41 kHz 18.8 kHz 18.8 kHz 37.6 kHz 37.6 kHz 37.6 kHz 37.6 kHz 75.3 kHz 75.3 kHz 75.3 kHz 75.3 kHz 150.6 kHz 150.6 kHz 150.6 kHz 150.6 kHz System BW 9 Hz 9 Hz 18 Hz 18 Hz 36 Hz 36 Hz 73.5 Hz 73.5 Hz 147 Hz 147 Hz 294 Hz 294 Hz 588 Hz 588 Hz 1.17 kHz 1.17 kHz 2.35 kHz 2.35 kHz 4.71 kHz 4.71 kHz 9.41 kHz 9.41 kHz 9.41 kHz 9.41 kHz 18.8 kHz 18.8 kHz 18.8 kHz 18.8 kHz 37.6 kHz 37.6 kHz 37.6 kHz 37.6 kHz CHART 1 7 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual OPERATIONAL CONSIDERATIONS Anti Alias and Reconstruction Filters The automatic sample control is transparent to the user and operates the internal input anti-alias (AA) and output reconstruction (RC) filters. These filters, operating in cascade, determine the system bandwidth and phase characteristics. The system bandwidth (amplitude response) is always limited to one-quarter of the sampling frequency in use. CHART 1 (above) shows the sample rate and system bandwidth for the available filter configurations. For lowpass (LP) and band-pass (BP) filters this is of little consequence because the cutoff frequency is internally programmed to be within the system bandwidth. However, the high frequency amplitude response of high-pass and band-reject filters is limited to the system bandwidth. The phase response of the AA and RC filters is always added to the filter function that is selected via the front panel. This effect is more pronounced on analog filter transfer functions than on the digital (FIR) filter transfer functions and when the filter selected is programmed to a frequency close to the sample rate. The delay, in digital (FIR) transfer functions, which appears as linear phase shift, is generally large enough that the phase contributed by the AA and RC filters is not significant. Figure 1 illustrates the effects of this additional phase on typical Butterworth low-pass filters with corner frequencies of 10% and 80% of system bandwidth. 6 Pole Butterworth Lowpass Phase response fc = 80% of system bandwidth 0 0 -200 -200 -400 w/o aaf & reconstruction filter Phase (deg) Phase (deg) 6 Pole Butterworth Lowpass Phase response fc = 10% of system bandwidth -600 -800 w/ aaf & reconstruction filter -1000 -400 -600 w/ aaf & reconstruction filter -800 -1000 -1200 -1200 -1400 -1400 -1600 -1600 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 Normalized Frequency (system bandwidth) Normalized Frequency (system bandwidth) Anti-Alias & Reconstruction Filter Frequency Response Anti-Alias & Reconstruction Filter Phase Response 0 0 -20 -200 -40 Phase (deg) Amplitude (dB) w/o aaf & reconstruction filter -60 -80 -100 -120 -140 -400 -600 -800 -1000 -160 -1200 -180 -200 -1400 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 Normalized Frequency (system bandwidth) Normalized Frequency (system bandwidth) FIGURE 1 8 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual Instrument Gain and Offset Considerations The user is provided with wide latitude in the selection of pre-gain (PRE) and post-gain (POST). Practical considerations should be recognized, since the linear operating range of both the input and output analog circuitry is limited to ±10V peaks (7.07Vrms in the case of a sine wave) hence amplitudes greater than this amount will result in saturation of the input or output. A large value of pre-gain may result in the saturation of the analog input stages and no-amount of post-gain correction will restore linear operation. Likewise very large values of post-gain may result in the saturation of the DSP output section. Very small values for post-gain may create poor signal-to-noise ratios as the DSP output is severely attenuated. Clip Indications To assist the user in identifying potential saturation, (non-linear operating condition), two clip-indicators are provided. ← CLIP) indicates that the input voltage after the application of pre-gain (PRE) An analog clip indicator (← exceeds the maximum linear (±10 Volt) range of the instrument. This is an approximate detector. Depending on the frequency and type of waveform applied to the input, non-linear operation may occur without an analog clip indication. A digital clip indicator (CLIP →) is activated when the peak-to-peak level of the output DSP waveform exceeds the digital-to-analog converters maximum range after the application of post-gains (POST). Input Voltage Range The ASC-50 has a maximum input operating voltage range of ±10Volts. Operation beyond this range will result is the display of one or both CLIP indicators. Maximum safe input range (non-operating) is noted in the specification. DC Offset Capability The DC offset capability allows the ASC-50 to accept input waveforms with DC levels that would otherwise cause the instrument to saturate, especially at high gain levels. The offset value displayed represents the approximate voltage that the input stage is offset from zero (0) Volts. Some external means of measuring the effect of a DC offset change is needed, such as a voltmeter or oscilloscope. The value presented is approximate, effects of drift must be recognized. Amplified dc offset can cause internal saturation and activation of the clip indicator. DSP Bypass Control The overall frequency response of the ASC-50 is the cascade of the anti-alias and reconstruction filters as well as the DSP filter chosen. DSP Bypass (BYP) allows the operator to remove the DSP filter from the cascade while retaining frequency sampling along with anti-alias and reconstruction filtering. Several uses for bypass are indicated. In order to judge the effect of the channel bandwidth, the DSP filter is temporarily removed, allowing a measurement to be made. Gain and phase responses can be obtained for DSP filters alone or by “normalizing” (using a relative 0dB gain and 0° phase) for sampling anti-alias and reconstruction filters. It must be remembered that Bypass does not bypass the entire ASC-50 but merely the internal DSP filter. 9 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual SPECIFICATIONS (@25°C and Rated Power Input) Input Characteristics Impedance Input Configuration Analog Clipping Indicator Threshold DC Offset Analog Pre-Gain Range CMMR 1MΩ || 47pF to Analog Ground (each input) Single Ended or Differential ±10V ±5V DC 0 to +36dB (6 dB steps) >60 dB @ 1 kHz Output Characteristics Impedance Output Configuration Digital Clipping Indicator Threshold Digital Post-Gain Range <1 Ω Single Ended ± Full Scale (Digital to Analog Converter) -48dB to +42dB (6 dB steps) Linear Signal Level Safe Signal Level Total Harmonic Distortion Noise ±10V Peak (7.07Vrms) max. ±60V Peak max. -70dBV typical @ 7.07Vrms 1kHz (Bypass Condition 30kHz BW) -90dBV typical Input Grounded (Bypass Condition 30kHz BW) We hope the information given here will be helpful. The information is based on data and our best knowledge, and we consider the information to be true and accurate. Please read all goods supplied by us. We assume no responsibility for the use of these statements, recommendations or suggestions, nor do we intend them as a recommendation for any use, which would infringe any, 10 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual INSTRUCTIONS TO CHANGE VOLTAGE ASC-50 BACK PANEL POWER ENTRY MODULE 1. 2. 3. 4. Disconnect power Remove black plastic cover next to power cord connection. Check fuses and replace blown fuse with 250V fuse. Remove pc-board with white plastic tab and position pc-board and tab for 230V or 240V operating voltage. White dot will show in window when correctly positioned. 5. Replace black plastic cover that contains new fuse. 6. Plug-in to electrical outlet and verify performance. 11 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual Theory of Operation Referring to the block diagram (Figure 2), the operation of the ASC-50 can be explained in terms of the various functional blocks. In Anti-Alias Filter (Programmable) A In Gain Control DIF/SNG Control DC Offset DSP A/D D/A Reconstruction Filter (Programmable) Out Freq Freq Analog Saturation Detection Filter, Bypass, Gain Control, Performance Digital Saturation Detection Microcontroller DISPLAY RESET ENTER BYP MODE ASC-50 ASC-50Block Block Diagram Diagram Figure 2 Micro-controller The micro-controller acts as a central administrator for all functional elements. Keypad operations are transformed into a format that the Digital Signal Processor (DSP) can recognize and display characters generated by the micro-controller. Input Amplifier Gain settings, single/differential input control, and DC offset level functions are incorporated within the input amplifier. 12 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual Saturation Detectors Analog and digital saturation detectors are routed from their sources to the display indicators. Anti-alias Filter Limits the input bandwidth to one-fourth of the sampling frequency, preventing corruption from out-of-band signals. Analog to Digital Converter The analog to digital converter (A/D) provides the Digital Signal Processor (DSP) with sampled amplitude data. Digital Signal Processor (DSP) The Digital Signal Processor (DSP) creates filter functions based upon micro-controller command, permits transition between active (ACT) and bypass (BYP) modes, and produces filter performance characteristics for display. With the exception of filter or frequency change, the sampled data stream from/to the DSP is not interrupted by micro-controller - DSP communication. The DSP determines the sample frequencies, loads and stores the filter coefficients, begins filter operation. Digital to Analog Converter The digital to analog converter (D/A) restores an analog waveform from the DSP output data word. Reconstruction Filter Smoothes the D/A waveform, removing sampling noise by limiting bandwidth to one-fourth the sampling frequency. Keypads Keypads provide the user interface by means of left/right arrow parameter selection and up/down arrow choice. In addition RESET restores a filter setup that was awaiting activation via the ENTER key. Bypass (BYP) activates the special DSP bypass operation. The MODE key allows viewing of all display screens. Display Permits viewing of filter setup choices clip indicators and performance characteristics within four modes. 13 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual Attachment 1 ASC50 Menu 1 of 2 Lowpass and Highpass Filter Menu Options Left or right arrow Filter Type Number of Poles Buttr 4P Cheby 6P Ell60 8P Ell80 10P Up or down arrow Low-Pass High-Pass LP Frequency HP FIR40 FIR60 FIR80 BP BR 14 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual Attachment 1 ASC50 Menu 2 of 2 Bandpass and Bandreject Filter Menu Options Left or right arrow LP Up or down arrow HP Filter Q Filter Type Buttr Pole Pairs Q2 Cheby 3PP Q5 Ell60 4PP Q10 BP Q20 Ell80 Frequency BR BW1 FIR40 Band-Pass Band-Reject BW2 FIR60 BW3 FIR80 BW4 15 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual AVAILABLE IIR TRANSFER FUNCTIONS -10 -10 -20 -30 -40 -50 -60 Amplitude (dB) -10 -20 -30 -40 -50 -60 -20 -30 -40 -50 -60 -70 -70 -70 -80 -80 -80 -90 -90 -90 -100 -100 -100 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 1.0 2 3 8 Pole 60dB Elliptic 10 Pole 60dB Elliptic -20 -20 -20 -30 -40 -50 -60 Amplitude (dB) 0 -10 Amplitude (dB) 0 -30 -40 -50 -60 -70 -70 -80 -80 -90 -90 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 Amplitude (dB) -10 Amplitude (dB) -10 -20 -30 -40 -50 -60 -80 -90 -90 -90 -100 -100 -100 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 10.0 -60 -70 4 2 -50 -80 3 1.0 -40 -80 2 5 6 7 8 -30 -70 1.0 4 -20 -70 5 6 7 8 3 8 Pole 80dB Elliptic -10 4 2 Normalized Frequency (Hz) 0 3 5 6 7 -70 6 Pole 80dB Elliptic Normalized Frequency (Hz) 10.0 -60 0 -60 5 6 7 -50 -90 3 4 Pole 80dB Elliptic -50 4 -40 0 -40 10.0 -30 Normalized Frequency (Hz) -30 5 6 7 -100 2 Normalized Frequency (Hz) -20 4 -80 -100 2 5 6 7 8 6 Pole 60dB Elliptic -10 0.1 4 Normalized Frequency (Hz) 0 0.1 3 Normalized Frequency (Hz) -10 2 2 Normalized Frequency (Hz) -100 Amplitude (dB) 4 Pole 60dB Elliptic 0 0.1 Amplitude (dB) 4,6,8,10 Pole Chebychev 0 Amplitude (dB) Amplitude (dB) 4,6,8,10 Pole Butterworth 0 3 Normalized Frequency (Hz) 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 4 Normalized Frequency (Hz) 16 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual AVAILABLE IIR TRANSFER FUNCTIONS -10 -10 -20 -30 -40 -50 -60 Amplitude (dB) -10 -20 -30 -40 -50 -60 -20 -30 -40 -50 -60 -70 -70 -70 -80 -80 -80 -90 -90 -90 -100 -100 -100 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 1.0 2 3 6 Pole 60dB Elliptic 8 Pole 60dB Elliptic -20 -20 -20 -30 -40 -50 -60 Amplitude (dB) 0 -10 Amplitude (dB) 0 -30 -40 -50 -60 -70 -70 -80 -80 -90 -90 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 Amplitude (dB) -10 Amplitude (dB) -10 -20 -30 -40 -50 -60 -80 -90 -90 -90 -100 -100 -100 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 10.0 -60 -70 4 2 -50 -80 3 1.0 -40 -80 2 5 6 7 8 -30 -70 1.0 4 -20 -70 5 6 7 8 3 6 Pole 80dB Elliptic -10 4 2 Normalized Frequency (Hz) 0 3 5 6 7 -70 4 Pole 80dB Elliptic Normalized Frequency (Hz) 10.0 -60 0 -60 5 6 7 -50 -90 3 10 Pole 60dB Elliptic -50 4 -40 0 -40 10.0 -30 Normalized Frequency (Hz) -30 5 6 7 -100 2 Normalized Frequency (Hz) -20 4 -80 -100 2 5 6 7 8 4 Pole 60dB Elliptic -10 0.1 4 Normalized Frequency (Hz) 0 0.1 3 Normalized Frequency (Hz) -10 2 2 Normalized Frequency (Hz) -100 Amplitude (dB) 4,6,8,10 Pole Chebychev 0 0.1 Amplitude (dB) 4,6,8,10 Pole Butterworth 0 Amplitude (dB) Amplitude (dB) 10 Pole 80dB Elliptic 0 3 Normalized Frequency (Hz) 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 4 Normalized Frequency (Hz) 17 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual AVAILABLE IIR TRANSFER FUNCTIONS -10 -10 -20 -30 -40 -50 -60 Amplitude (dB) -10 -20 -30 -40 -50 -60 -20 -30 -40 -50 -60 -70 -70 -70 -80 -80 -80 -90 -90 -90 -100 -100 -100 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 5 6 7 8 1.0 2 3 4 4PP Butterworth Q2,5,10,20 3PP Chebychev Q2,5,10,20 4PP Chebychev Q2,5,10,20 -20 -20 -20 -30 -40 -50 -60 Amplitude (dB) 0 -10 Amplitude (dB) 0 -30 -40 -50 -60 -90 -90 -90 -100 -100 -100 1.0 2 3 4 5 6 7 10.0 -70 -80 0.1 2 Normalized Frequency (Hz) 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 3 PP 60dB Elliptic Q2 -10 -40 -50 -60 Amplitude (dB) -10 Amplitude (dB) -10 -30 -20 -30 -40 -50 -60 -60 -70 -80 -90 -90 -90 -100 -100 -100 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 Normalized Frequency (Hz) 4 -50 -80 3 3 -40 -80 2 2 -30 -70 1.0 1.0 -20 -70 5 6 7 8 5 6 7 8 3 PP 60dB Elliptic Q10 0 4 4 3 PP 60dB Elliptic Q5 0 3 3 Normalized Frequency (Hz) 0 Normalized Frequency (Hz) 2 Normalized Frequency (Hz) -20 10.0 -60 -80 5 6 7 8 5 6 7 -50 -80 4 10.0 -40 -70 3 5 6 7 -30 -70 2 4 Normalized Frequency (Hz) -10 0.1 3 Normalized Frequency (Hz) 0 2 2 Normalized Frequency (Hz) -10 0.1 Amplitude (dB) 3PP Butterworth Q2,5,10,20 0 0.1 Amplitude (dB) 10 Pole 80dB Elliptic 0 Amplitude (dB) Amplitude (dB) 8 Pole 80dB Elliptic 0 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 Normalized Frequency (Hz) 18 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual AVAILABLE IIR TRANSFER FUNCTIONS -10 -10 -20 -30 -40 -50 -60 Amplitude (dB) -10 -20 -30 -40 -50 -60 -20 -30 -40 -50 -60 -70 -70 -70 -80 -80 -80 -90 -90 -90 -100 -100 -100 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 5 6 7 8 1.0 2 3 4 PP 60dB Elliptic Q10 4 PP 60dB Elliptic Q20 3 PP 80dB Elliptic Q2 -20 -20 -20 -30 -40 -50 -60 Amplitude (dB) 0 -10 Amplitude (dB) 0 -30 -40 -50 -60 -90 -90 -90 -100 -100 -100 1.0 2 3 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 3 PP 80dB Elliptic Q5 -10 -50 -60 Amplitude (dB) -10 Amplitude (dB) -10 -40 -20 -30 -40 -50 -60 -60 -70 -80 -90 -90 -90 -100 -100 -100 4 5 6 7 10.0 10.0 -50 -80 3 0.1 2 3 4 5 6 7 8 1.0 2 3 Normalized Frequency (Hz) 3 -40 -80 2 2 -30 -70 1.0 1.0 -20 -70 5 6 7 8 5 6 7 8 3 PP 80dB Elliptic Q20 0 4 4 3 PP 80dB Elliptic Q10 0 3 3 Normalized Frequency (Hz) 0 Normalized Frequency (Hz) 2 Normalized Frequency (Hz) -30 5 6 7 -70 -80 Normalized Frequency (Hz) -20 4 -60 -80 5 6 7 8 10.0 -50 -80 4 5 6 7 -40 -70 3 4 -30 -70 2 4 Normalized Frequency (Hz) -10 0.1 3 Normalized Frequency (Hz) 0 2 2 Normalized Frequency (Hz) -10 0.1 Amplitude (dB) 4 PP 60dB Elliptic Q5 0 0.1 Amplitude (dB) 4 PP 60dB Elliptic Q2 0 Amplitude (dB) Amplitude (dB) 3PP 60dB Elliptic Q20 0 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 Normalized Frequency (Hz) 19 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual AVAILABLE IIR TRANSFER FUNCTIONS 4 PP 80dB Elliptic Q5 -10 -10 -10 -20 -30 -40 -50 -60 Amplitude (dB) 0 -20 -30 -40 -50 -60 -30 -40 -50 -60 -70 -70 -80 -80 -80 -90 -90 -90 -100 -100 -100 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 2 Normalized Frequency (Hz) 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 3 PP Butterworth Q2 -10 -10 -20 -20 -40 -50 -60 Amplitude (dB) -10 Amplitude (dB) 0 -30 -30 -40 -50 -60 -90 -90 -90 -100 -100 0.1 1.0 2 3 4 5 6 7 10.0 0.6 0.7 0.8 0.9 1.0 1.1 1.2 Normalized Frequency (Hz) 3 PP Butterworth Q10 3 PP Butterworth Q20 1.3 1.4 0.6 Amplitude (dB) 0 -10 Amplitude (dB) 0 -60 -20 -30 -40 -50 -60 -80 -90 -90 -90 -100 -100 -100 1.0 1.1 1.2 1.3 1.4 0.6 0.7 0.8 0.9 1.0 1.1 1.2 Normalized Frequency (Hz) 1.2 1.3 1.4 1.3 1.4 -60 -70 0.9 1.1 -50 -80 Normalized Frequency (Hz) 1.0 -40 -80 0.8 0.9 -30 -70 0.7 0.8 -20 -70 0.6 0.7 4 PP Butterworth Q2 -10 -50 10.0 Normalized Frequency (Hz) 0 -40 5 6 7 -70 -10 -30 4 -80 Normalized Frequency (Hz) -20 3 -60 -80 5 6 7 8 2 -50 -80 4 1.0 -40 -70 3 5 6 7 8 -30 -70 -100 4 3 PP Butterworth Q5 0 -20 3 Normalized Frequency (Hz) 0 2 2 Normalized Frequency (Hz) 4 PP 80dB Elliptic Q20 Amplitude (dB) -20 -70 0.1 Amplitude (dB) 4 PP 80dB Elliptic Q10 0 Amplitude (dB) Amplitude (dB) 4PP 80dB Elliptic Q2 0 1.3 1.4 0.6 0.7 0.8 0.9 1.0 1.1 1.2 Normalized Frequency (Hz) 20 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual AVAILABLE IIR TRANSFER FUNCTIONS -10 -10 -20 -30 -40 -50 -60 Amplitude (dB) -10 -20 -30 -40 -50 -60 -20 -30 -40 -50 -60 -70 -70 -70 -80 -80 -80 -90 -90 -90 -100 -100 -100 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 0.6 1.0 1.1 1.2 3 PP Chebychev Q2 3 PP Chebychev Q5 3 PP Chebychev Q10 -20 -20 -20 -30 -40 -50 -60 Amplitude (dB) 0 -10 Amplitude (dB) 0 -30 -40 -50 -60 -90 -90 -90 -100 -100 -100 1.1 1.2 1.3 1.4 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 0.6 3 PP Chebychev Q20 -10 -10 -50 -60 Amplitude (dB) -10 Amplitude (dB) 0 -40 -20 -30 -40 -50 -60 -60 -70 -80 -90 -90 -90 -100 -100 -100 1.3 1.4 1.4 -50 -80 1.2 0.6 0.7 0.8 0.9 1.0 1.1 1.2 -40 -80 1.1 1.1 -30 -70 1.0 1.0 -20 -70 0.9 0.9 4 PP Chebychev Q5 4 PP Chebychev Q2 0 Normalized Frequency (Hz) 0.8 Normalized Frequency (Hz) 0 0.8 0.7 Normalized Frequency (Hz) -30 1.3 -70 -80 Normalized Frequency (Hz) -20 1.4 -60 -80 1.0 1.3 -50 -80 0.9 1.4 -40 -70 0.8 1.3 -30 -70 0.7 0.9 Normalized Frequency (Hz) -10 0.6 0.8 Normalized Frequency (Hz) 0 0.7 0.7 Normalized Frequency (Hz) -10 0.6 Amplitude (dB) 4PP Butterworth Q20 0 0.6 Amplitude (dB) 4PP Butterworth Q10 0 Amplitude (dB) Amplitude (dB) 4PP Butterworth Q5 0 1.2 Normalized Frequency (Hz) 1.3 1.4 0.6 0.7 0.8 0.9 1.0 1.1 1.2 Normalized Frequency (Hz) 21 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual AVAILABLE IIR TRANSFER FUNCTIONS -10 -10 -20 -30 -40 -50 -60 Amplitude (dB) -10 -20 -30 -40 -50 -60 -20 -30 -40 -50 -60 -70 -70 -70 -80 -80 -80 -90 -90 -90 -100 -100 -100 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 0.6 1.0 1.1 1.2 3PP 60dB Elliptic Q5 3PP 60dB Elliptic Q10 3PP 60dB Elliptic Q20 -20 -20 -20 -30 -40 -50 -60 Amplitude (dB) 0 -10 Amplitude (dB) 0 -30 -40 -50 -60 -90 -90 -90 -100 -100 -100 1.1 1.2 1.3 1.4 -70 -80 0.6 0.7 Normalized Frequency (Hz) 0.8 0.9 1.0 1.1 1.2 1.3 1.4 0.6 4PP 60dB Elliptic Q2 -10 -10 -40 -50 -60 Amplitude (dB) -10 Amplitude (dB) 0 -30 -20 -30 -40 -50 -60 -50 -60 -70 -80 -80 -90 -90 -90 -100 -100 -100 1.2 1.3 1.4 0.6 0.7 0.8 0.9 1.0 1.1 1.2 Normalized Frequency (Hz) 1.2 -40 -80 1.1 1.1 -30 -70 1.0 1.0 -20 -70 0.9 0.9 4PP 60dB Elliptic Q10 4PP 60dB Elliptic Q5 0 Normalized Frequency (Hz) 0.8 Normalized Frequency (Hz) 0 0.8 0.7 Normalized Frequency (Hz) -20 1.4 -60 -80 1.0 1.3 -50 -80 0.9 1.4 -40 -70 0.8 1.3 -30 -70 0.7 0.9 Normalized Frequency (Hz) -10 0.6 0.8 Normalized Frequency (Hz) 0 0.7 0.7 Normalized Frequency (Hz) -10 0.6 Amplitude (dB) 3PP 60dB Elliptic Q2 0 0.6 Amplitude (dB) 4 PP Chebychev Q20 0 Amplitude (dB) Amplitude (dB) 4 PP Chebychev Q10 0 1.3 1.4 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 Normalized Frequency (Hz) 22 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual AVAILABLE IIR TRANSFER FUNCTIONS -10 -10 -20 -30 -40 -50 -60 Amplitude (dB) -10 -20 -30 -40 -50 -60 -20 -30 -40 -50 -60 -70 -70 -70 -80 -80 -80 -90 -90 -90 -100 -100 -100 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 0.6 1.0 1.1 1.2 3PP 80dB Elliptic Q10 3PP 80dB Elliptic Q20 4PP 80dB Elliptic Q2 -20 -20 -20 -30 -40 -50 -60 Amplitude (dB) 0 -10 Amplitude (dB) 0 -30 -40 -50 -60 -90 -90 -90 -100 -100 -100 1.1 1.2 1.3 1.4 -70 -80 0.6 0.7 Normalized Frequency (Hz) 0.8 0.9 1.0 1.1 1.2 1.3 1.4 0.6 4PP 80dB Elliptic Q5 -10 -10 -40 -50 -60 Amplitude (dB) -10 Amplitude (dB) 0 -30 -20 -30 -40 -50 -60 -50 -60 -70 -80 -80 -90 -90 -90 -100 -100 -100 1.2 1.3 1.4 0.6 0.7 0.8 0.9 1.0 1.1 1.2 Normalized Frequency (Hz) 1.2 -40 -80 1.1 1.1 -30 -70 1.0 1.0 -20 -70 0.9 0.9 4PP 80dB Elliptic Q20 4PP 80dB Elliptic Q10 0 Normalized Frequency (Hz) 0.8 Normalized Frequency (Hz) 0 0.8 0.7 Normalized Frequency (Hz) -20 1.4 -60 -80 1.0 1.3 -50 -80 0.9 1.4 -40 -70 0.8 1.3 -30 -70 0.7 0.9 Normalized Frequency (Hz) -10 0.6 0.8 Normalized Frequency (Hz) 0 0.7 0.7 Normalized Frequency (Hz) -10 0.6 Amplitude (dB) 3PP 80dB Elliptic Q5 0 0.6 Amplitude (dB) 3PP 80dB Elliptic Q2 0 Amplitude (dB) Amplitude (dB) 4PP 60dB Elliptic Q20 0 1.3 1.4 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 Normalized Frequency (Hz) 23 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual AVAILABLE FIR TRANSFER FUNCTIONS -10 -10 -20 -30 -40 -50 -60 Amplitude (dB) -10 -20 -30 -40 -50 -60 -20 -30 -40 -50 -60 -70 -70 -70 -80 -80 -80 -90 -90 -90 -100 -100 -100 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 5 6 7 8 1.0 2 3 60dB 63 Tap 60dB 127 Tap 60dB 511 Tap -20 -20 -20 -30 -40 -50 -60 Amplitude (dB) 0 -10 Amplitude (dB) 0 -30 -40 -50 -60 -90 -90 -90 -100 -100 -100 1.0 2 3 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 80dB 63 Tap -10 -50 -60 Amplitude (dB) -10 Amplitude (dB) -10 -40 -20 -30 -40 -50 -60 -80 -90 -90 -90 -100 -100 -100 5 6 7 10.0 4 5 6 7 10.0 -60 -70 4 10.0 -50 -80 3 0.1 2 3 4 5 6 7 8 1.0 2 3 -40 -80 2 2 -30 -70 1.0 1.0 -20 -70 Normalized Frequency (Hz) 5 6 7 8 80dB 511 Tap 0 5 6 7 8 4 80dB 127 Tap 0 4 3 Normalized Frequency (Hz) 0 3 2 Normalized Frequency (Hz) -30 5 6 7 -70 -80 Normalized Frequency (Hz) -20 4 -60 -80 5 6 7 8 10.0 -50 -80 4 5 6 7 -40 -70 3 4 -30 -70 2 4 Normalized Frequency (Hz) -10 0.1 3 Normalized Frequency (Hz) 0 2 2 Normalized Frequency (Hz) -10 0.1 Amplitude (dB) 40dB 511 Tap 0 0.1 Amplitude (dB) 40dB 127 Tap 0 Amplitude (dB) Amplitude (dB) 40dB 63 Tap 0 3 Normalized Frequency (Hz) 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 Normalized Frequency (Hz) 24 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual AVAILABLE FIR TRANSFER FUNCTIONS -10 -10 -20 -20 -20 -30 -40 -50 -60 -70 Amplitude (dB) -10 -30 -40 -50 -60 -70 -30 -40 -50 -60 -70 -80 -80 -90 -90 -90 -100 -100 -100 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 -80 0.1 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 1.0 2 3 60dB 127 Tap 60dB 511 Tap -20 -20 -20 -30 -40 -50 -60 -70 Amplitude (dB) 0 -10 Amplitude (dB) 0 -30 -40 -50 -60 -70 -80 -80 -90 -90 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 -20 Amplitude (dB) -10 -20 Amplitude (dB) -10 -20 -30 -40 -50 -60 -70 -90 -100 -100 5 6 7 10.0 3 5 6 7 10.0 -70 -100 4 2 -60 -90 3 1.0 -50 -90 2 5 6 7 8 -40 -80 1.0 4 -30 -80 5 6 7 8 3 80dB 511 Tap -10 4 2 Normalized Frequency (Hz) 0 3 4 -70 80dB 127 Tap Normalized Frequency (Hz) 10.0 -60 0 -70 5 6 7 -50 -90 3 80dB 63 Tap -60 4 -40 0 -50 10.0 -30 Normalized Frequency (Hz) -40 5 6 7 -100 2 Normalized Frequency (Hz) -30 4 -80 -100 2 5 6 7 8 60dB 63 Tap -10 0.1 4 Normalized Frequency (Hz) 0 0.1 3 Normalized Frequency (Hz) -10 2 2 Normalized Frequency (Hz) -100 Amplitude (dB) 40dB 511 Tap 0 0.1 Amplitude (dB) 40dB 127 Tap 0 Amplitude (dB) Amplitude (dB) 40dB 63 Tap 0 -80 0.1 2 3 4 5 6 7 8 1.0 2 3 Normalized Frequency (Hz) 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 Normalized Frequency (Hz) 25 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual AVAILABLE FIR TRANSFER FUNCTIONS -10 -10 -20 -20 -20 -30 -40 -50 -60 -70 Amplitude (dB) -10 -30 -40 -50 -60 -70 -30 -40 -50 -60 -70 -80 -80 -90 -90 -90 -100 -100 -100 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 -80 0.1 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 5 6 7 8 1.0 2 3 40dB 63 Tap Q5 40dB 127 Tap Q5 40dB 511 Tap Q5 -20 -20 -20 -30 -40 -50 -60 -70 Amplitude (dB) 0 -10 Amplitude (dB) 0 -30 -40 -50 -60 -70 -90 -100 -100 2 3 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 40dB 63 Tap Q10 -10 -20 -20 -60 -70 Amplitude (dB) -10 -20 Amplitude (dB) -10 -50 -30 -40 -50 -60 -70 -90 -100 -100 5 6 7 10.0 5 6 7 10.0 -70 -100 4 4 -60 -90 3 3 -50 -90 2 2 -40 -80 1.0 1.0 -30 -80 Normalized Frequency (Hz) 5 6 7 8 40dB 511 Tap Q10 0 5 6 7 8 4 40dB 127 Tap Q10 0 4 3 Normalized Frequency (Hz) 0 3 2 Normalized Frequency (Hz) -40 10.0 -80 Normalized Frequency (Hz) -30 5 6 7 -70 -100 1.0 4 -60 -90 5 6 7 8 10.0 -50 -90 4 5 6 7 -40 -80 3 4 -30 -80 2 4 Normalized Frequency (Hz) -10 0.1 3 Normalized Frequency (Hz) 0 2 2 Normalized Frequency (Hz) -10 0.1 Amplitude (dB) 40dB 511 Tap Q2 0 0.1 Amplitude (dB) 40dB 127 Tap Q2 0 Amplitude (dB) Amplitude (dB) 40dB 63 Tap Q2 0 -80 0.1 2 3 4 5 6 78 1.0 2 3 Normalized Frequency (Hz) 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 Normalized Frequency (Hz) 26 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual AVAILABLE FIR TRANSFER FUNCTIONS -10 -10 -20 -30 -40 -50 -60 Amplitude (dB) -10 -20 -30 -40 -50 -60 -20 -30 -40 -50 -60 -70 -70 -70 -80 -80 -80 -90 -90 -90 -100 -100 -100 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 5 6 7 8 1.0 2 3 40dB 63 Tap Q5 40dB 127 Tap Q5 40dB 511 Tap Q5 -20 -20 -20 -30 -40 -50 -60 Amplitude (dB) 0 -10 Amplitude (dB) 0 -30 -40 -50 -60 -90 -90 -90 -100 -100 -100 1.0 2 3 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 40dB 63 Tap Q10 -10 -50 -60 Amplitude (dB) -10 Amplitude (dB) -10 -40 -20 -30 -40 -50 -60 -80 -90 -90 -90 -100 -100 -100 5 6 7 10.0 4 5 6 7 10.0 -60 -70 4 10.0 -50 -80 3 0.1 2 3 4 5 6 78 1.0 2 3 -40 -80 2 2 -30 -70 1.0 1.0 -20 -70 Normalized Frequency (Hz) 5 6 7 8 40dB 511 Tap Q10 0 5 6 7 8 4 40dB 127 Tap Q10 0 4 3 Normalized Frequency (Hz) 0 3 2 Normalized Frequency (Hz) -30 5 6 7 -70 -80 Normalized Frequency (Hz) -20 4 -60 -80 5 6 7 8 10.0 -50 -80 4 5 6 7 -40 -70 3 4 -30 -70 2 4 Normalized Frequency (Hz) -10 0.1 3 Normalized Frequency (Hz) 0 2 2 Normalized Frequency (Hz) -10 0.1 Amplitude (dB) 40dB 511 Tap Q2 0 0.1 Amplitude (dB) 40dB 127 Tap Q2 0 Amplitude (dB) Amplitude (dB) 40dB 63 Tap Q2 0 3 Normalized Frequency (Hz) 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 Normalized Frequency (Hz) 27 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual AVAILABLE FIR TRANSFER FUNCTIONS -10 -10 -20 -30 -40 -50 -60 Amplitude (dB) -10 -20 -30 -40 -50 -60 -20 -30 -40 -50 -60 -70 -70 -70 -80 -80 -80 -90 -90 -90 -100 -100 -100 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 5 6 7 8 1.0 2 3 60dB 63 Tap Q20 60dB 127 Tap Q20 60dB 511 Tap Q20 -20 -20 -20 -30 -40 -50 -60 Amplitude (dB) 0 -10 Amplitude (dB) 0 -30 -40 -50 -60 -90 -90 -90 -100 -100 -100 1.0 2 3 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 80dB 63 Tap Q2 -10 -50 -60 Amplitude (dB) -10 Amplitude (dB) -10 -40 -20 -30 -40 -50 -60 -80 -90 -90 -90 -100 -100 -100 5 6 7 10.0 4 5 6 7 10.0 -60 -70 4 10.0 -50 -80 3 0.1 2 3 4 5 6 78 1.0 2 3 -40 -80 2 2 -30 -70 1.0 1.0 -20 -70 Normalized Frequency (Hz) 5 6 7 8 80dB 511 Tap Q2 0 5 6 7 8 4 80dB 127 Tap Q2 0 4 3 Normalized Frequency (Hz) 0 3 2 Normalized Frequency (Hz) -30 5 6 7 -70 -80 Normalized Frequency (Hz) -20 4 -60 -80 5 6 7 8 10.0 -50 -80 4 5 6 7 -40 -70 3 4 -30 -70 2 4 Normalized Frequency (Hz) -10 0.1 3 Normalized Frequency (Hz) 0 2 2 Normalized Frequency (Hz) -10 0.1 Amplitude (dB) 60dB 511 Tap Q10 0 0.1 Amplitude (dB) 60dB 127 Tap Q10 0 Amplitude (dB) Amplitude (dB) 60dB 63 Tap Q10 0 3 Normalized Frequency (Hz) 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 Normalized Frequency (Hz) 28 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual AVAILABLE FIR TRANSFER FUNCTIONS -10 -10 -20 -30 -40 -50 -60 Amplitude (dB) -10 -20 -30 -40 -50 -60 -20 -30 -40 -50 -60 -70 -70 -70 -80 -80 -80 -90 -90 -90 -100 -100 -100 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 5 6 7 8 1.0 2 3 80dB 63 Tap Q10 80dB 127 Tap Q10 80dB 511 Tap Q10 -20 -20 -20 -30 -40 -50 -60 Amplitude (dB) 0 -10 Amplitude (dB) 0 -30 -40 -50 -60 -90 -90 -90 -100 -100 -100 1.0 2 3 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 10.0 0.1 80dB 63 Tap Q20 -10 -50 -60 Amplitude (dB) -10 Amplitude (dB) -10 -40 -20 -30 -40 -50 -60 -80 -90 -90 -90 -100 -100 -100 5 6 7 10.0 4 5 6 7 10.0 -60 -70 4 10.0 -50 -80 3 0.1 2 3 4 5 6 78 1.0 2 3 -40 -80 2 2 -30 -70 1.0 1.0 -20 -70 Normalized Frequency (Hz) 5 6 7 8 80dB 511 Tap Q20 0 5 6 7 8 4 80dB 127 Tap Q20 0 4 3 Normalized Frequency (Hz) 0 3 2 Normalized Frequency (Hz) -30 5 6 7 -70 -80 Normalized Frequency (Hz) -20 4 -60 -80 5 6 7 8 10.0 -50 -80 4 5 6 7 -40 -70 3 4 -30 -70 2 4 Normalized Frequency (Hz) -10 0.1 3 Normalized Frequency (Hz) 0 2 2 Normalized Frequency (Hz) -10 0.1 Amplitude (dB) 80dB 511 Tap Q5 0 0.1 Amplitude (dB) 80dB 127 Tap Q5 0 Amplitude (dB) Amplitude (dB) 80dB 63 Tap Q5 0 3 Normalized Frequency (Hz) 4 5 6 7 10.0 0.1 2 3 4 5 6 7 8 1.0 2 3 Normalized Frequency (Hz) 29 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual AVAILABLE FIR TRANSFER FUNCTIONS 40dB 127 Tap Q2 -10 -10 -10 -20 -30 -40 -50 -60 Amplitude (dB) 0 -20 -30 -40 -50 -60 -30 -40 -50 -60 -70 -70 -80 -80 -80 -90 -90 -90 -100 -100 -100 0.6 0.8 1.0 1.2 1.4 1.6 0.4 0.6 Normalized Frequency (Hz) 0.8 1.0 1.2 1.4 1.6 0.4 40dB 127 Tap Q5 -10 -10 -20 -20 -40 -50 -60 Amplitude (dB) -10 Amplitude (dB) 0 -30 -30 -40 -50 -60 -90 -90 -90 -100 -100 -100 1.4 1.6 0.4 0.6 0.8 1.0 1.2 1.4 1.6 0.4 40dB 63 Tap Q10 -10 -10 -50 -60 Amplitude (dB) -10 Amplitude (dB) 0 -40 -20 -30 -40 -50 -60 -50 -60 -70 -80 -80 -90 -90 -90 -100 -100 -100 1.2 1.4 1.6 1.6 -40 -80 1.0 1.4 -30 -70 0.8 0.4 0.6 0.8 1.0 1.2 Normalized Frequency (Hz) 1.2 -20 -70 Normalized Frequency (Hz) 1.0 40dB 511 Tap Q10 40dB 127 Tap Q10 0 0.6 0.8 Normalized Frequency (Hz) 0 0.4 0.6 Normalized Frequency (Hz) -30 1.6 -70 -80 Normalized Frequency (Hz) -20 1.4 -60 -80 1.2 1.6 -50 -80 1.0 1.4 -40 -70 0.8 1.2 -30 -70 0.6 1.0 40dB 511 Tap Q5 0 -20 0.8 Normalized Frequency (Hz) 0 0.4 0.6 Normalized Frequency (Hz) 40dB 63 Tap Q5 Amplitude (dB) -20 -70 0.4 Amplitude (dB) 40dB 511 Tap Q2 0 Amplitude (dB) Amplitude (dB) 40dB 63 Tap Q2 0 1.4 1.6 0.4 0.6 0.8 1.0 1.2 Normalized Frequency (Hz) 30 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual AVAILABLE FIR TRANSFER FUNCTIONS 40dB 127 Tap Q20 0 0 -10 -10 -20 -30 -40 -50 -60 Amplitude (dB) 0 -20 -30 -40 -50 -60 -30 -40 -50 -60 -70 -70 -80 -80 -80 -90 -90 -90 -100 -100 -100 0.6 0.8 1.0 1.2 1.4 1.6 0.4 0.6 Normalized Frequency (Hz) 0.8 1.0 1.2 1.4 1.6 0.4 60dB 127 Tap Q2 -10 -10 -20 -20 -40 -50 -60 Amplitude (dB) -10 Amplitude (dB) 0 -30 -30 -40 -50 -60 -90 -90 -90 -100 -100 -100 1.4 1.6 0.4 0.6 0.8 1.0 1.2 Normalized Frequency (Hz) 60dB 63 Tap Q5 60dB 127 Tap Q5 1.4 1.6 0.4 -60 Amplitude (dB) 0 -10 Amplitude (dB) 0 -10 -50 -20 -30 -40 -50 -60 -60 -70 -80 -90 -90 -90 -100 -100 -100 1.0 1.2 1.4 1.6 1.6 -50 -80 0.8 1.4 -40 -80 Normalized Frequency (Hz) 0.4 0.6 0.8 1.0 1.2 Normalized Frequency (Hz) 1.2 -30 -70 0.6 1.0 -20 -70 0.4 0.8 60dB 511 Tap Q5 0 -40 0.6 Normalized Frequency (Hz) -10 -30 1.6 -70 -80 Normalized Frequency (Hz) -20 1.4 -60 -80 1.2 1.6 -50 -80 1.0 1.4 -40 -70 0.8 1.2 -30 -70 0.6 1.0 60dB 511 Tap Q2 0 -20 0.8 Normalized Frequency (Hz) 0 0.4 0.6 Normalized Frequency (Hz) 60dB 63 Tap Q2 Amplitude (dB) -20 -70 0.4 Amplitude (dB) 40dB 511 Tap Q20 -10 Amplitude (dB) Amplitude (dB) 40dB 63 Tap Q20 1.4 1.6 0.4 0.6 0.8 1.0 1.2 Normalized Frequency (Hz) 31 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual AVAILABLE FIR TRANSFER FUNCTIONS -10 -10 -20 -30 -40 -50 -60 Amplitude (dB) -10 -20 -30 -40 -50 -60 -20 -30 -40 -50 -60 -70 -70 -70 -80 -80 -80 -90 -90 -90 -100 -100 -100 0.6 0.8 1.0 1.2 1.4 1.6 0.4 0.6 0.8 1.0 1.2 1.4 1.6 0.4 1.2 60dB 63 Tap Q20 60dB 127 Tap Q20 60dB 511 Tap Q20 -20 -20 -20 -30 -40 -50 -60 Amplitude (dB) 0 -10 Amplitude (dB) 0 -30 -40 -50 -60 -90 -90 -90 -100 -100 -100 1.4 1.6 0.4 0.6 0.8 1.0 1.2 1.4 1.6 0.4 80dB 63 Tap Q2 -10 -10 -50 -60 Amplitude (dB) -10 Amplitude (dB) 0 -40 -20 -30 -40 -50 -60 -40 -50 -60 -70 -80 -80 -80 -90 -90 -90 -100 -100 -100 1.4 1.6 1.6 -30 -70 1.2 0.4 0.6 0.8 1.0 1.2 Normalized Frequency (Hz) 1.2 -20 -70 1.0 1.0 80dB 511 Tap Q2 80dB 127 Tap Q2 0 0.8 0.8 Normalized Frequency (Hz) 0 Normalized Frequency (Hz) 0.6 Normalized Frequency (Hz) -30 1.4 -70 -80 Normalized Frequency (Hz) -20 1.6 -60 -80 1.2 1.4 -50 -80 1.0 1.6 -40 -70 0.8 1.4 -30 -70 0.6 1.0 Normalized Frequency (Hz) -10 0.4 0.8 Normalized Frequency (Hz) 0 0.6 0.6 Normalized Frequency (Hz) -10 0.4 Amplitude (dB) 60dB 511 Tap Q10 0 0.4 Amplitude (dB) 60dB 127 Tap Q10 0 Amplitude (dB) Amplitude (dB) 60dB 63 Tap Q10 0 1.4 1.6 0.4 0.6 0.8 1.0 1.2 Normalized Frequency (Hz) 32 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com ASC-50 Operation Manual AVAILABLE FIR TRANSFER FUNCTIONS 80dB 127 Tap Q5 -10 -10 -10 -20 -20 -20 -30 -40 -50 -60 -70 Amplitude (dB) 0 -30 -40 -50 -60 -70 -40 -50 -60 -70 -80 -90 -90 -90 -100 -100 -100 0.6 0.8 1.0 1.2 1.4 1.6 -80 0.4 0.6 Normalized Frequency (Hz) 0.8 1.0 1.2 1.4 1.6 0.4 80dB 127 Tap Q10 -10 -10 -20 -20 -20 -50 -60 -70 Amplitude (dB) -10 Amplitude (dB) 0 -40 -30 -40 -50 -60 -70 -90 -100 -100 1.6 0.4 0.6 0.8 1.0 1.2 Normalized Frequency (Hz) 80dB 63 Tap Q20 80dB 127 Tap Q20 1.4 1.6 0.4 -20 -20 -20 -70 Amplitude (dB) 0 -10 Amplitude (dB) 0 -10 -60 -30 -40 -50 -60 -70 -60 -70 -90 -90 -100 -100 -100 0.8 1.0 1.2 1.4 1.6 1.6 -50 -90 Normalized Frequency (Hz) 1.2 -40 -80 0.6 1.0 -30 -80 0.4 0.8 80dB 511 Tap Q20 0 -50 0.6 Normalized Frequency (Hz) -10 -40 1.4 -80 Normalized Frequency (Hz) -30 1.6 -70 -100 1.4 1.4 -60 -90 1.2 1.6 -50 -90 1.0 1.4 -40 -80 0.8 1.2 -30 -80 0.6 1.0 80dB 511 Tap Q10 0 -30 0.8 Normalized Frequency (Hz) 0 0.4 0.6 Normalized Frequency (Hz) 80dB 63 Tap Q10 Amplitude (dB) -30 -80 0.4 Amplitude (dB) 80dB 511 Tap Q5 0 Amplitude (dB) Amplitude (dB) 80dB 63 Tap Q5 0 -80 0.4 0.6 0.8 1.0 1.2 Normalized Frequency (Hz) 1.4 1.6 0.4 0.6 0.8 1.0 1.2 Normalized Frequency (Hz) 33 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com