Models 960 & 960B Single Channel – Wideband High-Gain Amplifier Instrument Certified Description Frequency Devices’ Models 960 & 960B instruments are single channel wideband highgain amplifier instruments. The bandwidth is adjustable from 10 Hz to 1 MHz wide and the gain can be set from 0 dB to 80 dB in 1 dB steps. The Amplifier has an input impedance of 1 MΩ shunted by 47pF in single ended mode and 2 MΩ shunted by 47pF in differential ended mode. The common mode rejection ratio (CMRR) is greater than 55 dB in differential mode. Standard operational features include: Adjustable gain to 80 dB Adjustable bandwidth to 1 MHz Differential or single ended input Differential or single ended output Output can drive 50Ω load Off-set adjustment Overload indicator BNC Connectors for all I/O Models 960 960B Standard AC Powered AC Powered, with battery option The optional battery powered 960B is particularly well suited to applications requiring isolation from an electrically noisy primary power source. Compact size and manual rotary switch front panel controls makes the 960 amplifier a popular, cost effective, easy-to-use solution for signal conditioning applications in the following areas: Biomedical Applications Data Recording/Playback EKG/EEG Data Amplification Medical Research Seismic Analysis Vibration Analysis Communications The 960 & 960B Amplifiers have a built in notch filter for 60 Hz or 50 Hz 1 1784 Chessie Lane, Ottawa, Illinois 61350 • Tel: 800/252-7074, 815/434-7800 • FAX: 815/434-8176 e-mail: [email protected] • Web Address: http://www.freqdev.com Models 960 & 960B Single Channel – Certified Model 960 Series Front Panel Description Location of Front Panel Terminals and Controls A. POWER Status Lamp: This red LED indicates whether or not the amplifier power is on. On the 960B battery operated model this lamp will blink when the battery needs recharging. B. dB Gain Switch: These selector switches allow the user to set the gain from 0 dB to 80 dB in 1 dB steps. C. Bandwidth Switch: This switch changes the amplifier bandwidth from 10 Hz up to 1 MHz in decades. D. Overload Lamp: This red LED comes on when the output of the amplifier is over driven and is no longer in linear gain mode. It will come on when the output is about 24 volts peak-to-peak. Reduce the gain or the input signal to turn this light off for best operation. E. Input BNC: This is the input connector for the amplifier. In single input mode the input signal is applied to the center pin of the BNC connector and the shell of the BNC connector is grounded. In differential input mode the non-inverting input is the center pin of the BNC connector and the inverting input is the shell of the BNC connector. F. Single/Differential Switch: This switch selects whether the amplifier input is in single ended or differential mode. the BNC connector and the shell of the BNC connector is grounded. In differential output mode the non-inverting output is the center pin of the BNC connector and the inverting output is the shell of the BNC connector. When this switch is in differential mode the gain of the amplifier is automatically adjusted to correct the output gain. G. GROUND Terminal: This “Banana” type test jack provides neat and secure access to the internal ground. This terminal is a convenient junction for grounding external system and measurement instrumentation and/or apparatus. H. OFFSET Adjust: This adjustment is intended to zero the offset that results from the instrument’s own internal circuitry. I. Single/Differential Switch: This switch selects whether the amplifier output is in single ended or differential mode. J. Output BNC: This is the output connector for the amplifier. In single output mode the output signal is applied to the center pin of 2 1784 Chessie Lane, Ottawa, Illinois 61350 • Tel: 800/252-7074, 815/434-7800 • FAX: 815/434-8176 e-mail: [email protected] • Web Address: http://www.freqdev.com Models 960 & 960B Single Channel – Model 960 Series Rear Panel Description Certified Location of Rear Panel Terminals, Controls and Labels Model 960 L K M Model 960B K. IDENTIFICATION LABEL: This label identifies the Model number, filter type, serial number, date of manufacture, operating power limits and fuse requirements of the instrument. L. AC POWER CONNECTION: Denotes plug and fuse location. M. POWER ON/OFF Switch: Is a twoposition toggle switch on the back panel that interrupts/completes the power circuit. N. VOLTAGE Selector Module: For 230 Vac operation, use a screwdriver blade to pry open the module door (entry point next to window), remove the red fuse cartridge, replace the 0.2 Amp, 250 V fuse with a 0.1 Amp, 250 Volt fuse, remove the shorting clip in the other leg and replace it with a second 0.1 Amp fuse. Turn the module 180 degrees, reinsert and close the module door. The numerals 230V will now show in the module window. Reverse procedure to change back to 115V. N 3 1784 Chessie Lane, Ottawa, Illinois 61350 • Tel: 800/252-7074, 815/434-7800 • FAX: 815/434-8176 e-mail: [email protected] • Web Address: http://www.freqdev.com Models 960 & 960B Single Channel – Certified Specifications Input Characteristics Output Characteristics: Small Signal Bandwidth Input Impedance: Differential Single Ended 2 MΩ Shunted by 47pF 1 MΩ Shunted by 47pF Coupling DC Input Voltage: Linear Differential Max Safe Differential Voltage 20V p-p (Gain Set at 0 dB) Any Continuous Value between ±40V Bias Current 1 nA typ.; 2 nA max. Output Max Power 0.25 Watt for RL=50Ω Common Mode Rejection ratio (0 dB Gain) > 80 dB @ 1 kHz > 70 dB @ 10 kHz > 55 dB @ 100 kHz Output Protection Short Circuit to Ground Output Impedance 50Ω Single 100Ω Differential Gain Settings 0 to 80 dB in 1 dB Steps Gain Accuracy ±0.2 dB Distortion @ 3.5 Vrms > 90 dB 1 kHz-10 kHz (at 0 dB Gain) Overload Light lights at ≈ 24 V p-p Transfer Function of Filters Bessel with Constant Delay in the Pass-Band Offset Voltage Adjustable to Zero Offset Voltage Range 0-60 dB Gain Setting 70 dB Gain Setting ± 0.5 VDC ± 1.5 VDC Output Max Voltage (Single Output) Minimum Discernable Signal* @ 1 kHz with 10 kHz Bandwidth 20V p-p for RL-2KΩ 10V p-p for RL=50Ω (DC to 500 kHz) 10V p-p for RL=2KΩ 5V p-p for RL=50Ω (500 kHz to 1 MHz) Noise Voltage Density @ 70 dB Gain 12 µVrms/√Hz typ. 1 MHz Bandwidth @ 1 kHz with 1 MHz Bandwidth >1 MHz @ 3 dB down 1 mV @ 0 dB Gain 20 µV @ 40 dB Gain 13 µV @ 70 dB Gain 1 mV @ 0 dB Gain 10 µV @ 40 dB Gain 2 µV @ 70 dB Gain * Minimum Discernable Signal is that signal that makes the output of the 960 Amplifier increase by 3 dB when measured with a wideband (2 MHz) True RMS Voltmeter. 4 1784 Chessie Lane, Ottawa, Illinois 61350 • Tel: 800/252-7074, 815/434-7800 • FAX: 815/434-8176 e-mail: [email protected] • Web Address: http://www.freqdev.com Models 960 & 960B Single Channel – Certified Power Supply AC Line Power Operation 960 960B Specifications 10 Watts max. 15 Watts max. Voltage Frequency Range-Rear Panel: 115 V 230 V Fuse 105 to 125Vac @ 50/60Hz 210 to 250Vac @ 50Hz 115 V=0.2 Amp., 230 V = 2X-0.1 Amp. Battery Operation (960B) Time for full Charge Battery Life Battery Charger Charge Status Indicator (Front Panel) Battery Operation 10 – 12 hours Approx. 500 Charge/Discharge Cycles Automatic Uninterruptible 3 Status Levels 8 Hours typ. Temperature Operating Temperature: Storage Temperature: 0 °C to +50 °C -25 °C to +70 °C Mechanical Dimensions Weight 960 960B Case Material Color 3.7"H x 8.66"W x 10.6"D 9.4cmH x 22.0cmW x 27.0cmD 3.5 lbs; 1.58 kgs 5.4 lbs; 2.45 kgs ABS plastic Light Gray A. AVAILABLE MODELS 1. 960* 2. 960B* 1 Standard AC powered model 1 AC powered with battery powered option *Please specify if you want the internal notch filter at 60 Hz or 50 Hz. NOTE: 1. See page 3, item “Q” Voltage selector Module. At time of shipment, Voltage is pre-selected in the 115 VAC position. For 230 VAC operation, this module must be rotated 180 degrees and an additional fuse must be added. 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. 5 1784 Chessie Lane, Ottawa, Illinois 61350 • Tel: 800/252-7074, 815/434-7800 • FAX: 815/434-8176 e-mail: [email protected] • Web Address: http://www.freqdev.com