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Author Topic: 53131A option -003 prescaler chip ID?  (Read 1225 times)

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Offline JwallingTopic starter

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53131A option -003 prescaler chip ID?
« on: June 21, 2017, 04:02:23 pm »
Rather than source a knock-off -003 prescaler board for my 53131A, I've decided to repair it if possible.
The counter becomes unstable @3GHz when a signal less than about -15dBm is measured. I've replaced all 4 amps with no change in the symptoms. The output of this prescaler is / 128. I can see that it's output is jittery, and I think (hope) it's the defective part, however, I can't ID the markings on the chip.

Anyone?
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Jay

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Offline branadic

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Re: 53131A option -003 prescaler chip ID?
« Reply #1 on: June 21, 2017, 04:29:48 pm »
Could it be an MB510 2.7GHz TWO MODULUS PRESCALER made by Fujitsu?
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Offline JwallingTopic starter

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Re: 53131A option -003 prescaler chip ID?
« Reply #2 on: June 21, 2017, 04:32:40 pm »
Quote from: branadic on June 21, 2017, 04:29:48 pm
Could it be an MB510 2.7GHz TWO MODULUS PRESCALER made by Fujitsu?

That could be it! that led me to https://groups.yahoo.com/neo/groups/hp_agilent_equipment/conversations/messages/73334

Many thanks!
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