[time-nuts] 3.0GHz Channel 3 installation in Agilent 53132A counter

GandalfG8 at aol.com GandalfG8 at aol.com
Tue Mar 18 15:37:41 EDT 2014

Hi Jim
According to the schematic in the 53132A service manual and the datasheet  
for the MB510 prescaler, the option 030 board is hard wired for a division 
ratio  of 1/128, and that's the lowest division ratio shown for that  
I've not fitted one of the original HP boards but have used similar  boards 
from a third party supplier and they just dropped straight in.
As a quick first check I would suggest monitoring the output from the  
MB510, either on the 030 board or at the ribbon cable, just to confirm that the  
board is dividing as expected.
There is an HP Service Note 53132A-04A that discusses the firmware  
requirements for updating which also might be worth checking just in case that's  
an issue.
In a message dated 18/03/2014 18:20:09 GMT Standard Time,  
jsrobbins at earthlink.net writes:

I hope  this is not too OT.

I have acquired a 3.0GHz original Channel 3  board for my Agilent 53132A
counter.  When installed, it reads four  times (4x) the actual frequency.
I'm wondering if anyone has any experience  with such an installation and 
point me to some setup item or zero ohm  resistor I'm supposed to install.
All that the manual says is to have it  done by the factory.  That will cost
me more than the board  itself.  Many thanks.

Jim  Robbins


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