[time-nuts] HP-8640B

engineering at mt.net engineering at mt.net
Thu Apr 25 17:51:45 EDT 2013


If you also Google "8640B manual" several sites will pop up offering  
free pdf manuals for this unit.

Greg


"Alf Pousar" <alf.pousar at surffi.net> wrote:

Hello Folks!

I turn to you in hope someone can help me.
The old but good signal generator 8640B is by Agilent declared  
obsolete and no support available.
The frequency counter in the last production versions, has a  
Pre-Scaler P/N 08640-60306 quite different from the "old" one  
08640-60168.
The old version have 5 IC's, the new has 6 IC's, 2x 1820-0982, 1x  
1820-0736 and the scaler 1820-1003, all four are EECL.
Two remainig are ECL  1820-0145 and 1820-0817.

I need a schematic diagram for this board. Any help on this matter is  
much appreciated.

Thank you,

Alf Pousar
OH2QM
alf.pousar at surffi.net


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