Low Phase Noise 5 Mhz Output (87-8009-5); Introduction; Specifications - Symmetricom XLi User Manual

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Low Phase Noise 5 MHz Output (87-8009-5)

Introduction

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This Low Phase Noise (LPN) output module provides four 5 MHz output signals with high spectral purity
and port-to-port isolation. Each LPN module has an on-board LPN oscillator that is phase locked to the
XLi's internal oscillator. Therefore, the LPN outputs have the same accuracy and long term stability as
the XLi's internal oscillator. This option requires an XLi with an upgraded oscillator (OCXO, High Stability
OCXO, Rubidium, or High Stability Rubidium).
This option can be added to the XLi in a "Plug-and-Play" manner, and operates without hardware or
software configuration.
The PLL status of all three Low Phase Noise option cards is given by the F73 Low Phase Noise PLL
indicator. See "F73 – Alarm Control / Status", page

Specifications

This option provides four 10 MHz frequency output signals.
Signal Type
Synchronization
Amplitude
Output Impedance
Quantity
Connector
Harmonic distortion
Spurious
Isolation
Phase Noise
CPU-Aware
176
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Analog sine wave
Phase locked to the XLi's internal 10 MHz oscillator
+13 dBm (±1 dBm)
50 Ω
4
Female BNC
-30 dBc
-90 dBc (10 Hz - 10 kHz SSB)
-70 dBc
-85 dBc/Hz @ 1 Hz offset
-115 dBc/Hz @ 10 Hz offset
-140 dBc/Hz @ 100 Hz offset
-145 dBc/Hz @ 1 kHz offset
-150 dBc/Hz @ 10 kHz offset
No
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94.
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XLi Time & Frequency System
XLi-man, Issue 8, 6/17/2008, Rev. H
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