Ok before jumping to conclusions and re-engineering how about figuring out what¡¯s really wrong with it ? If you talk about removing and rewiring you might as well get a control board from a 8517A and turn the 8516 into a 17 then all you need is a 40GHz 8360 ?
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On Mar 18, 2022, at 17:47, Bruce via groups.io <bruce@...> wrote:
?Can he pull the 40GHz section (filter, doubler, relay, etc) out of the 8516, and use DC levels to control it while driving it with the 8340 That way he could eliminate the doubler/filter as the root of the problem.
Cheers!
Bruce
Quoting Lothar baier <Lothar@...>:
Agilent initially used the DB25 for the 8410 interface , when the 8516 was conceived ( as a response to wiltron being the first one to introduced a 40GHz VNA ) they repurposed the interface to control the doubler and filter module , this change encompassed a different CPU board 08340-60299 and upgraded FW , for synthesizers with 2812A upwards this was incorporated while for older sources a upgrade was offered by HP !
The control interface was maintained on the 8360 series even though the 8360 series unlike the older 8340/41 models offered coverage to 50GHz mostly because the 8516 can not operate with a 40GHz source , agilent of course could have offered a HW upgrade to either bypass or remove the doubler module and change the input connector for the source input but at the time the 8360 series came out they also had the 8517 testset which covered to 50GHz so I guess agilent saw a opportunity to sell new testsets ?
From: [email protected] <[email protected]> On Behalf Of aves via groups.io
Sent: Friday, March 18, 2022 3:17 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] 8516A cable question
The only fix is to have the correct output from the 8340-41! The older source label says 8410B-C Interface and they mean it. We need the Auxiliary Interface like the 83621A dedicated sweeper for the 8510C which might be documented in the service manual.
