Models 900CT & 900BT
8 Pole
Low Pass Filters
900L8L
900L8E
900L8EY
8-Pole, 6 zero
Elliptic
0.1 Hz to 49.9 kHz
1 part in 499
within each decade
-0.05 dB
0
±
0.1 dB typ.
0
±
0.2 dB max.
-100 dB typ.
fc
±2%
max.
±0.5%
typ.
±2%
max.
±0.01%/°C
typ.
±0.02%/°C
max.
-0.05 dB
-419°
0.05 dB
3.01 dB
60.0 dB
80.0 dB
1.00 fr
1.06 fr
1.83 fr
2.00 fr
Single Channel –
Model
Transfer Function
Range fc, fr
Theoretical Transfer
Characteristics
Tuning Resolution
Passband Ripple
Pass Band Voltage
Gain
(non-inverting
)
Certified
900L8B
8-Pole
Butterworth
0.1 Hz to 49.9 kHz
1 part in 499
within each decade
0.0 dB
0
±
0.1 dB typ.
0
±
0.2 dB max.
48 dB/Octave
fc
±2%
max.
±0.5%
typ.
±2%
max.
±0.01%/°C
typ.
±0.02%/°C
max.
-3 dB
-360°
0.12 dB
3.01 dB
60.0 dB
80.0 dB
0.80 fc
1.00 fc
2.37 fc
3.16 fc
Filter Specifications
8-Pole
8-Pole, 6 zero
Bessel
Elliptic
0.1 Hz to 49.9 kHz
1 part in 499
within each decade
0.0 dB
0
±
0.1 dB typ.
0
±
0.2 dB max.
48 dB/Octave
fc
±2%
max.
±0.5%
typ.
±2%
max.
±0.01%/°C
typ.
±0.02%/°C
max.
-3 dB
-182°
1.91 dB
3.01 dB
60.0 dB
80.0 dB
0.80 fc
1.00 fc
4.52 fc
6.07 fc
0.1 Hz to 49.9 kHz
1 part in 499
within each decade
±0.035
dB
0
±
0.1 dB typ.
0
±
0.2 dB max.
-80 dB typ.
fc
±2%
max.
±0.5%
typ.
±2%
max.
±0.01%/°C
typ.
±0.02%/°C
max.
-0.035 dB
-323°
0.35 dB
3.01 dB
60.0 dB
80.0 dB
1.00 fr
1.13 fr
1.67 fr
1.77 fr
Stopband
Attenuation
Cutoff Frequency
Accuracy
Stability
Amplitude
Phase
Filter Attenuation
(theoretical)
Total Harmonic
Distortion @ 1 kHz
Wide Band Noise
(5 Hz – 2 MHz)
<-90 dB typ.
<-90 dB typ.
<-90 dB typ.
<-88 dB typ.
200µV
rms
typ.
50µV
rms
typ.
200µV
rms
typ.
50µV
rms
typ.
250µV
rms
typ.
75µV
rms
typ.
250µV
rms
typ.
75µV
rms
typ.
Narrow Band Noise
(5 Hz – 100 kHz)
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
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