The HPDA-15RM distribution amplifier exceeds the performance required to distribute state-of-the-art atomic frequency standards. The HPDA-15RM 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-15RM 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-15RM is an enhanced version of the NIST high isolation distribution amplifier.

HPDA-15 Options

HPDA-15RM-A

      This option provides an amplifier module with one input and five outputs in a 1U high 19" rack-mount enclosure. The power required is 110/220 VAC. The front panel contains 1 SMA input connector, 5 SMA output connectors and a power "on" indicator LED. The back panel contains a power entry module

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HPDA-15-RM-A Users Manual

HPDA-15RM-B

      This option provides three amplifier modules in a 1U high 19" rack-mount enclosure. Each amplifier module has one input and five outputs. Power requirements are 110/220 VAC. The front panel contains a power "on" indicator LED and 3 signal level indicator LEDs. The back panel contains a power entry connector, 3 SMA input connectors and 15 SMA output connectors. Battery backup module for uninterrupted operation is optional.

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HPDA-15-RM-B Users Manual

HPDA-15RM-C

      This option provides three amplifier modules in a 1U high 19" rack-mount enclosure. Each amplifier module has one input and five outputs. Power requirements are 110/220 VAC. The front panel contains a power "on" indicator LED and 3 signal level indicator LEDs. The back panel contains AC and DC power entry connectors, 3 SMA input connectors and 15 SMA output connectors. This unit includes a battery backup module that allows the instrument to be powered by a 24 VDC power source in case of loss of the main AC power.

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HPDA-15-RM-C Users Manual
Specifications
ParameterConditionsMinTypMaxUnits
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		 -
-		 -48
-40		 -45
-		 dBc
Isolation Output to output
Output to input		 120
120		 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		 -
-		 3
1.5		 5
-		 ps/°C
All tests done at 5 MHz and +13 dBm input unless otherwise specified

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