Low Phase Noise 10 Mhz Output (87-8009-10); Introduction; Specifications; Mhz Sine/Mpps Square Output (86-8008) - Symmetricom XLi User Manual

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Low Phase Noise 10 MHz Output (87-8009-10)

Introduction

This Low Phase Noise (LPN) output module provides four 10 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

1, 5, 10 MHz Sine/MPPS Square Output (86-8008)

Introduction
The 1, 5, 10 MHz/MPPS card generates four stable-frequency sine or square wave outputs through its
four BNC connectors. These outputs are phased-locked to the XLi's disciplined internal oscillator or
external frequency reference source (See
card's output frequencies are set by manually configuring jumpers on the output card. Once configured,
XLi Time & Frequency System
XLi-man, Issue 8, 6/17/2008, Rev. H
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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
"F113 – J3 Input (Aux Ref, Freq Meas)" on page
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94.
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2
1
5
146). The
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