950H8B

Model 950 Single ChannelDescription Frequency Devices’ Model 950 instruments furnish the user with an 8-pole low-pass or high-pass filter that is tunable by front panel controls. The controls allow the user to select a corner frequency between 10 Hz and 50 kHz with 6 steps from each of two selectable ranges. The instrument exhibits an input impedance of 1 Meg Ω shunted by 47pF to a single ended signal source. When configured in the differential mode, the instrument has a common mode rejection ratio (CMRR) which exceeds 60dB; in this mode the instrument presents an input impedance of 2 Meg Ω shunted by 47pF to a double ended single source. Front panel gain control also enables the operator to select a gain factor of 0, 10, or 20dB. Standard operational features include: 1) Adjustable Frequency Control 2) Differential Input Amplifiers 3) Adjustable Gain Control 4) Off-set Adjustment 5) BNC Connectors for Signal I/O Compact size and manual rotary switch front panel controls make 950 instruments a popular, cost effective, easy-to-use solution for signal conditioning applications in the following areas: Anti-aliasing Filters Biomedical/Biotechnology Applications Data Recording/Playback Data Smoothing EKG/EEG Signal Filtering FDM/PCM Signal Filtering Medical Research Industrial Process Control Seismic Analysis Vibration Analysis 1 Certified Tunable Filter Instruments Available Low-Pass Models: . . . . . . . . . . . . . Page 950L8B 8-pole Butterworth. . . . . . . . . . . . . . . . . . 3 950L8L 8-pole Bessel . . . . . . . . . . . . . . . . . . . . . 3 Available High-Pass Models: . . . . . . . . . . . . . Page 950H8B 8-pole Butterworth. . . . . . . . . . . . . . . . . . 3 General Specifications: . . . . . . . . . . . . . . . . . . . 6 1784 Chessie Lane, Ottawa, IL 61350 • Tel: 800/252-7074, 815/434-7800 • FAX: 815/434-8176 e-mail: sales@freqdev.com • Web Address: http://www.freqdev.com Model 950 Tunable Filter Instruments BLOCK DIAGRAM GAIN (dB) INPUT 10dB 0dB 20dB A-B A + DIFF AMP 8-POLE TUNABLE FILTER OFFSET NULLED CORNER FREQUENCY TUNING OFFSET TYPICAL ADJUSTMENT FUNCTION OUTPUT AMP OUT A B TYPICAL FRONT PANEL BNC CONNECTOR ON TUNEABLE ACTIVE FILTER INPUT A A-B A GND 20 GAIN (dB) 10 0 - 950 50 100 20 10 200 FREQUENCY 500 IN Hz CORNER OFFSET OUT + B R x100 A N G E x1 2 1784 Chessie Lane, Ottawa, IL 61350 • Tel: 800/252-7074, 815/434-7800 • FAX: 815/434-8176 e-mail: sales@freqdev.com • Web Address: http://www.freqdev.com Model 950 Tunable Filter Instruments Model Product Specifications Transfer Function Range fc Theoretical Transfer Characteristics Passband Ripple (theoretical) 950L8B Low-Pass 8-Pole, Butterworth 10 Hz to 50.0 kHz Appendix A Page 9 0.0 dB 0 ± 0.1 dB typ. 0 ± 0.2 dB max. 950L8L Low-Pass 8-Pole, Bessel 10 Hz to 50.0 kHz Appendix A Page 4 0.0 dB 0 ± 0.1 dB typ. 0 ± 0.2 dB max. Model 950H8B High-Pass Transfer Function Range fc Theoretical Transfer Characteristics Passband Ripple (theoretical) 8-Pole, Butterworth 10 Hz to 50.0 kHz Appendix A Page 29 0.0 dB 0 ± 0.2 dB to 100 kHz 0 ± 0.5 dB to 120 kHz 120 kHz 48 dB/Octave fc ± 2% max. ± 0.05% typ. ± 2% max. ± 0.01%/°C typ. ± 0.02%/°C max. -3 dB -360° 80.0 dB 60.0 dB 3.01 dB 0.00 dB