Re: HP-8753E R Channel Output Free Running
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This one was solved this morning. It did not like the CAL data from the 8753E which this board has come from. I loaded the constants which came from the host machine and this seemed to resolve it.?
On Saturday, February 19, 2022, 11:34:35 PM EST, Rich Miller via groups.io <av8torrich@...> wrote:
Despite my initial success making progress on the EEPROM, it appears Murphy has struck. I started getting an error regarding the R Channel Input on my 8753E. When I plugged the R Channel output into my Spectrum Analyzer, I get the result as seen in the picture attached. Looks to me like something is free running at 2.55GHz or so.
I have the VNA in zero span at a frequency of 50MHz. As you will note the signal seems to be jumping all over based on my Max Hold capture. The primary signal is consistently at or around 2.5GHz (close to it), but makes massive excursions.??
I suppose not good deed goes unpunished! Time to start chasing this down.
Rich?
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