900CT Datasheet, PDF (8/19 Pages) Frequency Devices, Inc. – Tunable Active Filter Instrument

Models 900CT & 900BT
Single Channel – Certified
8 Pole
High Pass Filters
Model
Transfer Function
900H8B
900H8E
Filter Specifications
8-Pole
8-Pole, 6 zero
Butterworth
Elliptic
900H8EY
8-Pole, 6 zero
Elliptic
Range fc, fr
0.1 Hz to 49.9 kHz 0.1 Hz to 49.9 kHz 0.1 Hz to 49.9 kHz
Theoretical Transfer Appendix A
Characteristics Page 29
Appendix A
Page 37
Appendix A
Page 38
Tuning Resolution
1 part in 499
1 part in 499
1 part in 499
within each decade within each decade within each decade
Passband Ripple 0.0 dB
±0.035 dB
-0.05 dB
Pass Band Voltage
Gain
(non-inverting)
0 ± 0.2 dB to.100kHz 0 ± 0.2 dB to.100kHz 0 ± 0.2 dB to.100kHz
0 ± 0.5 dB to 120kHz. 0 ± 0.5 dB to 120kHz. 0 ± 0.5 dB to 120kHz.
Powert Bandwidth 120 kHz
120 kHz
120 kHz
Stopband
Attenuation
48 dB/Octave
-80 dB typ.
-100 dB typ.
Cutoff Frequency
Accuracy
fc
±2% max.
±0.5% typ.
±2% max.
fc
±2% max.
±0.5% typ.
±2% max.
fc
±2% max.
±0.5% typ.
±2% max.
Stability
Amplitude
Phase
±0.01%/°C typ.
±0.02%/°C max.
-3 dB
-360°
±0.01%/°C typ.
±0.02%/°C max.
-0.035 dB
-323°
±0.01%/°C typ.
±0.02%/°C max.
-0.5 dB
-419°
Filter Attenuation
(theoretical)
80.0 dB
60.0 dB
3.01 dB
0.00 dB
0.31 fc
0.42 fc
1.00 fc
2.00 fc
80.0 dB
60.0 dB
3.01 dB
0.03 dB
0.00 dB
0.56 fr
0.60 fr
0.88 fr
1.00 fr
2.00 fr
100.0 dB
80.0 dB
3.01 dB
0.03 dB
0.00 dB
0.50 fr
0.55 fr
0.94 fr
1.00 fr
2.00 fr
Total Harmonic
Distortion @ 1 kHz
<-88 dB typ.
<-88 dB typ.
<-88 dB typ.
Wide Band Noise
(5 Hz – 2 MHz)
400µV_rms typ.
400µV_rms typ.
500µV_rms typ.
Narrow Band Noise
(5 Hz – 100 kHz)
100µV_rms typ.
100µV_rms typ.
150µV_rms typ.
8
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