Model ASC-50 Certified Description Frequency Devices’ ASC-50, is a laboratory bench-top programmable instrument that combines familiar analog signal input and output with the power and flexibility of DSP. The ASC-50 provides the user with finger-tip control of filter type, (low-pass, high-pass, band-pass, and band-reject), operating frequency, pole/bandwidth configuration, pre and post gain settings, and analog/DSP filter functions - including many not available through conventional analog techniques. All are accessible at the touch of a button. With a frequency range from 0.1Hz to 30kHz combined with amplitude response of Butterworth, Chebychev, elliptic and finite-impulse-response (FIR) filter functions, the ASC-50 offers wide tuning flexibility without the need for pre-defined programming. An analog instrumentation interface provides input gain; DC offset control and variable output gain along with selectable single-ended and differential inputs to accommodate a variety of driving signals. Additionally, input DC-offset control is provided with expanded resolution. With the exception of filter and frequency changes all parameters of the ASC-50 can be altered on the fly without halting signal flow. Real-time bypass and gain-control facilitate test comparisons with and without the filter activated. A four button touch-pad coupled with a liquid-crystal display (LCD) affords the user complete control of various signal conditioning functions. Through the LCD, the operator is prompted by a selection of several filter types, functions, frequency and gain settings. Less than optimum selections are indicated, providing guidance without regimentation. Saturation (over-range) conditions are indicated on both the input and output permitting ease of system setup and use. 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 Over 200 LP, HP, BP, BR Analog & DSP Filters Options AVAILABLE OPERATING MODES Mode 1 Field 1 Filter type Field 2 Filter function Field 3 Number of poles or pole-pairs Field 4 Q/Bandwidth Field 5 Active/Bypass Field 6 Corner frequency Mode 2 Field 1 Pre-gain control Field 2 Post/gain control Mode 3 Field 1 Single/Differential control Field 2 Input DC offset control Mode 4 Field 1 Shape factor/Transition band Field 2 Stop-band bandwidth 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 Model ASC-50 Analog/DSP Filter/Amplifier Instrument LP, HP, BP, BR 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) Available Low-Pass, High-Pass Transfer Functions ANALOG • Butterworth 4,6,8,10 Pole • Chebychev (0.1dB Ripple) 4,6,8,10 Pole • Elliptic-60 dB (0.1dB Ripple) 4,6,8,10 Pole • Elliptic-80 dB (0.1dB Ripple) 4,6,8,10 Pole DIGITAL • FIR-40 dB • FIR-60 dB • FIR-80 dB Available Band-Pass, Band-Reject Transfer Functions ANALOG • Butterworth 3,4 Pole-Pair Q = 2,5,10,20 • Chebychev 3,4 Pole-Pair Q = 2,5,10,20 (0.1dB Ripple) • Elliptic-60 dB 3,4 Pole-Pair Q = 2,5,10,20 (0.1dB Ripple) • Elliptic-80 dB 3,4 Pole-Pair Q = 2,5,10,20 (0.1dB Ripple) 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 DIGITAL • FIR-40 dB • FIR-60 dB • FIR-80 dB Over-Range Indication • Analog saturation, clipping detection ( CLIP) • Digital saturation, clipping detection (CLIP ) BW1,BW2,BW3,BW4 BW1,BW2,BW3,BW4 BW1,BW2,BW3,BW4 Specifications (@ 25° °C and Rated Power Input) Input Characteristics Impedance Input Configuration Analog Clipping Indicator Threshold DC Offset Analog Pre-Gain Range CMRR 1MΩ || 47pF to analog ground (each input) Single Ended or Differential ±10V ±5V DC 0 to +36 dB (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) -48 dB to +42 dB (6 dB steps) Linear Signal Level Safe Signal Level Total Harmonic Distortion Noise ±10V Peak (7.07Vrms) max. ±60V Peak max. -70 dBV typ. @ 7.07Vrms 1 kHz (Bypass condition 30 kHz BW) -90 dBV typ. input grounded (Bypass condition 30 kHz 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 statements, recommendations or suggestions herein in conjunction with our conditions of sale which apply to 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 patent or copyright. PR-ASC-50-00 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