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25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839
e-mail: sales@freqdev.com • Web Address: http://www.freqdev.com
858 Series
8-Pole
Low-Pass Filters
4
1.Unit to unit match for the same transfer function, set to the same frequency and operating configuration, and from the same manufacturing lot.
Model
858L8L
858L8D60
858L8D80
858L8D10
Product Specifications
Transfer Function
8-Pole
8-Pole, 6 zero
8-Pole, 6 zero
8-Pole, 6 zero
Bessel
Constant Delay
Constant Delay
Constant Delay
Size, Model 2
4.0” x 2.0” x 0.6”
4.0” x 2.0” x 0.6”
4.0” x 2.0” x 0.6”
4.0” x 2.0” x 0.6”
Model 3 thru 6
4.0” x 2.0” x 0.4”
4.0” x 2.0” x 0.4”
4.0” x 2.0” x 0.4”
4.0” x 2.0” x 0.4”
Range fc
0.1 Hz to 102.4 kHz
0.1 Hz to 102.4 kHz
0.1 Hz to 102.4 kHz
0.1 Hz to 102.4 kHz
Theoretical Transfer
Appendix A
Appendix A
Appendix A
Appendix A
Characteristics
Page 4
Page 20
Page 21
Page 22
Passband Ripple
0.0 dB
0.15 dB
0.15 dB
0.15 dB
(theoretical)
DC Voltage Gain
0 ± 0.1 dB max.
0 ± 0.1 dB max.
0 ± 0.1 dB max.
0 ± 0.1 dB max.
(non-inverting)
0 ± 0.05 dB typ.
0 ± 0.05 dB typ.
0 ± 0.05 dB typ.
0 ± 0.05 dB typ.
Stopband
Attenuation Rate
48 dB/octave
60 dB min.
80 dB min.
100 dB min.
Cutoff Frequency
fc
± 2% max.
fc
± 2% max.
fc
± 2% max.
fc
± 2% max.
Stability
± 0.01% /°c
± 0.01% /°c
± 0.01% /°c
± 0.01% /°c
Amplitude
- 3 dB
- 3 dB
- 3 dB
- 3 dB
Phase
-182°
-306°
-306°
-311°
Filter Attenuation
1.91 dB
0.80 fc
3.01 dB
1.00 fc
3.01 dB
1.00 fc
3.01 dB
1.00 fc
(theoretical)
3.01 dB
1.00 fc
40.0 dB
2.28 fc
60.0 dB
3.08 fc
80.0 dB
4.45 fc
60.0 dB
4.52 fc
60.0 dB
2.64 fc
80.0 dB
3.57 fc
100.0 dB
5.20 fc
80.0 dB
6.07 fc
Phase Match1
0 - fc
± 2° max.
0 - fc
± 2° max.
0 - fc
± 2° max.
0 - fc
± 2° max.
± 1° typ.
± 1° typ.
± 1° typ.
± 1° typ.
Amplitude Accuracy
0 - fc
± 0.2 dB max.
0 - 0.8 fc
± 0.2 dB max.
0 - 0.8 fc
± 0.2 dB max.
0 - 0.8 fc
± 0.2 dB max.
(theoretical)
± 0.1 dB typ.
± 0.1 dB typ.
± 0.1 dB typ.
± 0.1 dB typ.
0.8 fc - 1.0 fc ± 0.3 dB max.
0.8 fc - 1.0 fc ± 0.3 dB max.
0.8 fc - 1.0 fc ± 0.3 dB max.
± 0.15 dB typ.
± 0.15 dB typ.
± 0.15 dB typ.
Total Harmonic
< - 100 dB typ.
< - 100 dB typ.
< - 100 dB typ.
< - 100 dB typ.
Distortion @ 1 kHz
Wide Band Noise
200
mVrms typ.
200
mVrms typ.
200
mVrms typ.
200
mVrms typ.
(5 Hz - 2 MHz)
Narrow Band Noise
50
mVrms typ.
50
mVrms typ.
50
mVrms typ.
50
mVrms typ.
(5 Hz - 100 kHz)
Filter Mounting
Assembly
FMA-03A
FMA-03A
FMA-03A
FMA-03A
8-Bit Programmable
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