He mentioned earlier in this thread that its only 20-40GHz but he also mentioned using a 20ft cable
? which could be the problem, I am not sure what the control interface is , the part number of the control cable says RS232 and there are 4 lines connected in the testset BUT the doubler control uses
a PAL as a decoder so I think it¡¯s a parallel interface and having a 20ft cable could be a bit much
From: Bruce via groups.io Sent: Wednesday, March 2, 2022 6:21 PM To: [email protected] Subject: Re: [HP-Agilent-Keysight-equipment] 8516A cable question
?
Does the IF error occur below 20 GHz ??? If not, the doubler is?
suspect - if so, look at the switching or the test set.
Nexg step would be to try and look at the test set VTO.? It is?
difficult because they pipe it directly into the samplers.
Cheers!
Bruce
Quoting ratn9ne@...:
> Wow you guys are fast to help!
> Here is some more info: error is only from 20-40GHz, so it has?
> something to do with the doubler I assume. Any span or frequency in?
> this range has this error. I have seen >20GHz work for a little?
> while but only randomly. My next idea is a shorter DB25 cable as?
> mine is about 20 feet long. Tried turning up the LO power coming in?
> on the sweeper with no luck. I can't find a replacement doubler on?
> ebay to test with. These must be very rare. Can they be serviced??
> This display/sweeper/control box setup has been tested with an 8515?
> and no errors at all.
>
>
>
