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Fixed Frequency
D68 & DP68 Series
8-Pole
High-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
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
D68H8B
D68H8E
D68H8EX
D68H8EY
Product Specifications
Transfer Function
8-Pole, Butterworth
8-Pole, 6 Zero,
8-Pole, 6 Zero,
8-Pole, 6 zero,
Elliptic
Elliptic
Elliptic
Size
1.8” x 0.8” x 0.3”
1.8” x 0.8” x 0.3”
1.8” x 0.8” x 0.3”
1.8” x 0.8” x 0.3”
Range fc, fr
D68
1 Hz to 100 kHz
1 Hz to 100 kHz
1 Hz to 100 kHz
1 Hz to 100 kHZ
DP68
Not Available
Not Available
Not Available
Not Available
Theoretical Transfer
Appendix A
Appendix A
Appendix A
Appendix A
Characteristics
Page 29
Page 37
Page 36
Page 38
Passband Ripple
0.0 dB
± 0.035 dB
-0.05 dB
-0.05 dB
(theoretical)
Voltage Gain
0 ± 0.2 dB to 100 kHz
0 ± 0.2 dB to 100 kHz
0 ± 0.2 dB to 100 kHz
0 ± 0.2 dB to 100 kHz
(non-inverting)
0 ± 0.5 dB to 120 kHz
0 ± 0.5 dB to 120 kHz
0 ± 0.5 dB to 120 kHz
0 ± 0.5 dB to 120 kHz
Stopband
Attenuation Rate
48 dB/octave
80 dB
80 dB
100 dB
Power Bandwidth
120 kHz
120 kHz
120 kHz
120 kHz
Small Signal Bandwidth
(-6dB) 1 MHz
(-6dB) 1 MHz
(-6dB) 1 MHz
(-6dB) 1 MHz
Cutoff Frequency
fc
± 1% max.
fr
± 1% max.
fr
± 1% max.
fr
± 2% max.
Stability
± 0.01% /°C
± 0.01% /°C
± 0.01% /°C
± 0.01% /°C
Amplitude
-3 dB
-0.035 dB`
-0.05 dB
-0.05 dB
Phase
-360°
-323.5°
-414°
-419°
Filter Attenuation
80.0 dB
0.31 fc
80.0 dB
0.56 fr
80.0 dB
0.64 fr
100.0 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
0.05 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.
0 - 1.25 fr
± 4° max.
0 - 1.25 fr
± 4° max.
0 - 1.25 fr
± 4° max.
± 1.5° typ.
± 2° typ.
± 2° typ.
± 2° typ.
1.25 fr-100 kHz
± 2° max.
1.25 fr-100 kHz
± 2° max.
1.25 fr-100 kHz ± 3° max.
± 1° typ.
± 1° typ.
± 1.5° typ.
Amplitude Accuracy
1.0 - 1.25 fc ± 0.3 dB max.
1.00 - 1.25 fr ± 0.3 dB max.
1.00 - 1.25 fr ± 0.5 dB max.
1.00 - 1.25 fr ± 0.5 dB max
(theoretical)
± 0.15 dB typ.
± 0.15 dB typ.
± 0.25 dB typ.
± 0.25 dB typ
1.25 fc-100 kHz± 0.2 dB max.
1.25 fr-100 kHz ± 0.2 dB max.
1.25 fr-100 kHz± 0.2 dB max.
1.25 fr-100 kHz ± 0.2 dB max.
± 0.1 dB typ.
±0 .1 dB typ.
±0 .1 dB typ.
±0 .1 dB typ.
Total Harmonic
Distortion @ 1 kHz
D68
<-88 dB typ.
<-88 dB typ.
<-88 dB typ.
<-88 dB typ.
Wide Band Noise
400
mVrms
400
mVrms typ.
500
mVrms typ.
500
mVrms typ.
(5 Hz - 2 MHz)
Narrow Band Noise
100
mVrms typ.
100
mVrms typ.
150
mVrms typ.
150
mVrms typ.
(20 Hz - 100 kHz)
Filter Mounting
Assembly
FMA-01A
FMA-01A
FMA-01A
FMA-01A
4
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