Symmetricom 87-8009-5 XLi Low Phase Noise 5MHz Quad BNC Output Card Microsemi [Used]

Low Phase Noise 5MHz Option Card • Four 5MHz Outputs on BNC Jacks • For XLi Chassis • Part Number 87-8009-5 • Used, Good Condition Used and in good condition. Removed from a working XLi chassis where all outputs were checked for a good 5MHz signal using a frequency counter. Usually the low phase noise cards were offered alongside units equipped with a OCXO or Rb oscillator.  The performance in a TCXO unit may be less than the published specification.  This is a multiple item listing so there will be very small non-performance affecting cosmetic differences between units. Description This card provides four isolated, 50 ohm 5MHz frequency output signals with exceptional spectral purity. Isolation from the receiver’s internal digital signal noise and power supply noise enables high-performance phase noise and spurious noise characteristics as the on-module low noise oscillator source. The low phase noise option requires an oscillator upgrade to the XLi/XLi SAASM system, such as an OCXO