On 3/19/2014 8:26 AM, James Robbins wrote:
Thanks for everyone's help here. I have done some further sleuthing.
I have a second 53132A which has a 3.0GHz Channel 3. So, I switched the new
channel 3 board into the old 53132A and it reads properly. Then, I switched
the old 3.0GHz Channel 3
No, the suggestion makes perfect sense. A 12 GHz input board likely
has an internal prescaler with a division ratio that is 4 times that
of a 3 GHz input board, in order to have the main counter running at
the same internal frequency. For example, a 3 GHz input might divide
by 32 while a 12 GHz
On 2014-03-19 16:00, James Robbins wrote:
I think I may need to clarify my prior posting.
Both old and new Channel 3 boards work fine (and read correctly) in my older
53132A counter.
Both old and new Channel 3 boards fail to work properly in (and read 4x actual)
the newer 53132A counter.
So
Hi Jim:
I've seen a similar problem when one end of a ribbon cable connector is
soldered to the wrong side of a PCB.
Maybe you can unsolder a connector and install it on the other side?
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
James
Jim the 5 and 12.8GHz modules are the same part and the software/firmware set
the upper freq limit. I assume at least the 12.8 GHz option must be
unlocked/accessed most likely through the key pad. The 5GHz may be plug and
play.
Thomas Knox
From: jsrobb...@earthlink.net
Date: Wed, 19 Mar
FYI: Here is the link to the 53132 CLIP.
http://www.home.agilent.com/agilent/redirector.jspx?action=refcname=AGILENT
_EDITORIALckey=1119025lc=engcc=USnfr=-33788.536880944.00
It wasn't there last I checked.
John K1AE
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On 2014-03-18 12:19, James Robbins wrote:
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 can
point
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
prescaler.
I've not fitted one of the original HP boards but
I think the solution will be in the firmware. It must be factory set so default
is the 5GHz C channel option. The 12GHz option is the same part as the 5GHz
sampler with a different firmware lock.
Best Wishes;
Thomas Knox
From: jsrobb...@earthlink.net
To: time-nuts@febo.com
Date: Tue, 18
Further checking the service manual indicates that the main board treats
pins 9 and 10 of the ribbon cable as CH3code1 and CH3 code2 respectively so
perhaps it's using these as identifiers and it might be worth checking that
those signals are as expected. The prescaler board schematic shows
Jim,
You were looking for a 0 Ohm resistor.
Sometimes HP did not, in fact, insert a 0 Ohm resistor component in later
revs of some PCBs. They just added the default 0 Ohmers in etch, between
two vias. Then, if someone wanted to open the link, the etch was cut. I
guess it saved a couple of
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