====== Bus cable Wiring for HP 8566/8568 Spectrum Analyzers ======
  
//This information relates to the Bus Cable for the HP 8566/8568 Spectrum Analyzers series.//

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Wiring on display end corresponds to pin numbering stamped on "DB-50" connector. Wiring on RF "centronics connector" end is as listed below with connector contacts facing you and long side of "D" to the left:

  * 50 49
  * 48 47                       
  * 46 45                      
  * 44 43   
  * 42 41
  * 40 39
  * 38 37
  * 36 35
  * 34 33
  * 32 31
  * 30 29
  * 28 27
  * 26 25
  * 24 23
  * 22 21
  * 20 19
  * 18 17
  * 16 15
  * 14 13
  * 12 11
  * 10 9
  * 8  7
  * 6  5
  * 4  3
  * 2  1

My Amphenol P/N 57-33500-1 50 pin connector has pins 1,25,26 and 50 labeled on the actual connector.

This would make what is:

Labeled Pin 1 on the "RF" connector actually Pin 2 on the display connector

Labeled Pin 26 on the "RF" connector actually Pin 1 on the display connector

Labeled Pin 25 on the "RF" connector actually Pin 50 on the display connector

Labeled Pin 50 on the " RF" connector actually Pin 49 on the display connector

Not too confusing, is it!

Thanks again,

Mike WA2YGA