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824 Series
4-Pole
Low-Pass Filters
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
8-Bit Programmable
1. Unit to unit match for the same transfer function, set to the same frequency and operating configuration, and from the same manufacturing lot.
3
Model
824L8B
824L8L
824L8Y2
824L8Y5
Product Specifications
Transfer Function
4-Pole,
4-Pole,
4-Pole, Chebychev,
4-Pole, Chebychev,
Butterworth
Bessel
0.2 dB Ripple
0.5 dB Ripple
Size, Model 2
2.0” x 2.0” x 0.5”
2.0” x 2.0” x 0.5”
2.0” x 2.0” x 0.5”
2.0” x 2.0” x 0.5”
Model 3 thru 6
2.0” x 2.0” x 0.4”
2.0” x 2.0” x 0.4”
2.0” x 2.0” x 0.4”
2.0” x 2.0” x 0.4”
Range fc
1.0 Hz to 102.4 kHz
1.0 Hz to 102.4 kHz
1.0 Hz to 102.4 kHz
1.0 Hz to 102.4 kHz
Theoretical Transfer
Appendix A
Appendix A
Appendix A
Appendix A
Characteristics
Page 7
Page 2
Page 12
Page 15
Passband Ripple
0.0 dB
0.0 dB
0.20 dB
0.50 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
24 dB/octave
24 dB/octave
24 dB/octave
24 dB/octave
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
-180°
-121°
-231°
-245°
Filter Attenuation
0.67 dB
0.80 fc
1.86 dB
0.80 fc
-0.20 dB
0.80 fc
-0.43 dB
0.80 fc
(theoretical)
3.01 dB
1.00 fc
3.01 dB
1.00 fc
3.01 dB
1.00 fc
3.01 dB
1.00 fc
30.0 dB
2.37 fc
30.0 dB
3.50 fc
30.0 dB
1.89 fc
30.0 dB
1.80 fc
40.0 dB
3.16 fc
40.0 dB
4.72 fc
40.0 dB
2.46 fc
40.0 dB
2.33 fc
Phase Match1
0 - 0.8 fc
± 2° max.
0 - fc
± 2° max.
0 - 0.8 fc
± 2° max.
0 - 0.8 fc
± 2° max.
± 1° typ.
± 1° typ.
± 1° typ.
± 1° typ.
0.8 fc - 1.0 fc ± 3° max.
0.8 fc - 1.0 fc ± 3° max.
0.8 fc - 1.0 fc ± 3° max.
± 1.5° typ.
± 1.5° typ.
± 1.5° typ.
Amplitude Accuracy
0 - 0.8 fc
± 0.2 dB max.
0 - 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.
< - 88 dB typ.
< - 88 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-02A
FMA-02A
FMA-02A
FMA-02A
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