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
4-Bit Programmable
428 Series
8-Pole
High-Pass Filters
Model
428H4B
428H4E
428H4EX
428H4EY
Product Specifications
Transfer Function
8-Pole
8-Pole, 6 zero
Butterworth
Elliptic
Size
0.8” x 1.8” x 0.5”
0.8" x 1.8" x 0.5"
Range fc, fr
10.0 Hz to 102.4 kHz
Theoretical Transfer
Characteristics
Passband Ripple
0.0 dB
± 0.035 dB
-0.05 dB
(theoretical)
Voltage Gain
0 ± 0.2 dB to 100 kHz
(non-inverting)
0 ± 0.5 dB to 120 kHz
Power Bandwidth
120 kHz
Small Signal
(-6 dB) 1 MHz
Bandwidth
Stopband
Attenuation Rate
48 dB/octave
80 dB
100 dB
Cutoff Frequency
fc
± 2% max.
fr
± 2% max.
fr
± 2% max.
fr
± 2% max.
Stability
± 0.01% /°c
Amplitude
-3 dB
-0.035 dB
-0.05 dB
Phase
-360°
-323.5°
-414°
-419°
Filter Attenuation
80 dB
0.31 fc
80 dB
0.56 fr
80 dB
0.64 fr
100 dB
0.50 fr
(theoretical)
60.0 dB
0.42 fc
60.0 dB
0.60 fr
60.0 dB
0.69 fr
80.0 dB
0.55 fr
3.01 dB
1.00 fc
3.01 dB
0.88 fr
3.01 dB
0.95 fr
3.01 dB
0.94 fr
0.00 dB
2.00 fc
0.03 dB
1.00 fr
0.03 dB
1.00 fr
0.03 dB
1.00 fr
0.00 dB
2.00 fr
0.00 dB
2.00 fr
0.00 dB
2.00 fr
Phase Match1
fc - 100 kHz
± 3° max.
fr - 1.25 fr
± 4° max.
fr - 1.25 fr
± 4° max.
fr - 1.25 fr
± 4° max.
± 1.5° typ.
± 2° typ.
1.25 fr-100 kHz ± 2° max.
1.25 fr-100 kHz ± 3° max.
± 1° typ.
± 1.5° typ.
Amplitude Accuracy
fc-1.25 fc
± 0.3 dB max. fr-1.25 fr
± 0.5 dB max. fr-1.25 fr
± 0.5 dB max.
(theoretical)
± 0.15 dB typ.
± 0.25 dB typ.
1.25 fc-100kHz ± 0.2 dB max.
1.25 fr-100 kHz ± 0.2 dB max.
± 0.1 dB typ.
Total Harmonic
< - 100 dB typ.
< - 88 dB typ.
Distortion @ 1 kHz
Wide Band Noise
400
Vrms typ.
400
Vrms typ.
500
Vrms typ.
500
Vrms typ.
(5 Hz - 2 MHz)
Narrow Band Noise
100
Vrms typ.
100
Vrms typ.
150
Vrms typ.
150
Vrms typ.
(5 Hz - 100 kHz)
Filter Mounting
Assembly
FMA-02A
1. Unit to unit match for the same transfer function, set to the same frequency and operating configuration, and from the same manufacturing lot.
5