Enhanced Low Phase Noise 10MHz Option Card • Four 10MHz Outputs on BNC Jacks • For XLi Chassis • Part Number 87-8040 • Used, Very Good Condition

Removed from a working XLi chassis where all outputs were checked for a good 10MHz signal using a frequency counter.  Note that this option card is intended for use in an XLi equipped with an OCXO or Rubidium oscillator.

Description: ENHANCED LOW PHASE NOISE 10 MHZ OUTPUT

This module provides the lowest phase noise frequency outputs from the XLi. Four isolated, 10 MHz frequency output signals with exceptional spectral purity. Isolation from the receivers internal digital signal noise and power supply noise enables the high-performance phase noise and spurious noise characteristics that approaches the performance of the on-module enhanced low noise oscillator. This option requires an oscillator upgrade to the XLi system, such as an OCXO, High Stability OCXO, Rubidium or High Stability Rubidium.

SPECIFICATIONS: ENHANCED LOW PHASE NOISE OUTPUT 87-8040

• Provides four 10 MHz frequency output signals

• Signal type: Analog sine wave

• Synchronization: Phase locked to the clock 10 MHz

• Accuracy: Function of input synchronization source (GPS, IRIG, 1PPS, Have Quick)

• Amplitude: +13dBm (1dBm)

• Output impedance: 50

• Quantity: 4

• Connector: BNC female

• Option Slots: 2

• Harmonic distortion: -50 dBc (2nd harmonic)

• Spurious: -80dBc (10 Hz - 10 kHz SSB)

• Isolation: -60dBc

• Phase noise

  • 98 dBc/Hz @ 1 Hz offset

  • 127 dBc/Hz @ 10 Hz offset

  • 145 dBc/Hz @ 100 Hz offset

  • 150 dBc/Hz @ 1 kHz offset

  • 153 dBc/Hz @ 10 kHz offset