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고성능시간, 주파수 분배시스템 > Nim Modules |
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The HPDA-5 distribution amplifier exceeds the performance required to distribute state-of-the-art atomic frequency standards. The HPDA-5 offers 126 dB of channel to channel isolation and 135 dB of reverse isolation. The exceptionally low phase-noise -150 dBc/Hz at 1 Hz implies a short term frequency stability of 1 part in 1014 at 1 s. The HPDA-5 exhibits a low temperature coefficient of phase of 3 ps/ºC throughout the operating range. The input and outputs have a low VSWR to minimize environmental effects on frequency distribution through long transmission lines. The HPDA-5 is an enhanced version of the NIST high isolation distribution amplifier.The power supply requirements are +/- (12.5 to 15) VDC and +/-0.25 A. A "loss of signal" monitor line is available on the NIM backplane.
HPDA-5NM Users Manual
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Specifications |
Parameter |
Conditions |
Min |
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Max |
Units |
| Input Power |
1 db compression |
17 |
18 |
- |
dBm |
| Bandwidth |
+/-1 dB |
1-20 |
- |
- |
MHz |
| Gain |
@5MHz |
- |
- |
+/-0.5 |
dB |
| Impedance |
Input
Output |
-
- |
50
50 |
-
- |
Ohms |
| Return loss |
Input(S11) 5 MHz
Output (S22) 5 MHz |
-
- |
-35
-25 |
-25
-25 |
dB |
| Distortion |
+13 dBm
+17dBm |
-
-
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-48
-40 |
-45
- |
dBc |
| Isolation |
Output to output
Output to input |
120
120
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126
135 |
-
- |
dB |
Phase noise
Phase noise plot available here |
1 Hz
10 Hz
1 kHz
10 kHz |
-
-
-
- |
-150
-160
-171
-172 |
-147
-157
-169
-170 |
dBc/Hz |
| Temperature-delay coefficient |
0-50 °C
25-35 °C |
-
-
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3
1.5 |
5
-
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ps/°C |
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| All tests done at 5 MHz and +13 dBm input unless otherwise specified |
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