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how to convert HP83711B to 83712B!

 

Hi folks,
?
I have converted my HP83711B signal generator into an HP83712B and have added options.
See here how I did it:
Maybe useful to someone or just fun to read.
?
Tom
 

"tom_iphi via groups.io" <iphi@...> writes:

Hi folks,

I have converted my HP83711B signal generator into an HP83712B and
have added options.
See here how I did it:
/g/HP-Agilent-Keysight-equipment/files/All%20HP,%20Agilent%20and%20Keysight%20instruments%20in%20folders%20by%20part%20numbers/A%2080000%20to%2089999/83711B%20and%2083712B%2020GHz%20signal%20generators/HP83711B_to_HP83712B.pdf

Maybe useful to someone or just fun to read.
Thanks a lot, very interesting read!

I also upgraded my 83752B with a 24V step attenuator, while the original
one uses 15V. Also seems to work fine.

One the 8375X series, there's a attenuator calibration table to
compensate each attenuator setting. Does the 8371X have such tables?
 

¿ªÔÆÌåÓý

I wonder if a dump of the EPROMs would show any interesting SCPI strings that might involve writing to the EEPROM so the coefficients could be written without disassembly while also calculating the checksums.

There had to have been service software running on a 9845 or a series 200/300 system for factory setup. I suspect it¡¯s not available, but the books left behind for it to run are likely there if found.

From: [email protected] <[email protected]> on behalf of Sven Schnelle <svens@...>
Sent: Sunday, May 18, 2025 3:02:16 PM
To: tom_iphi via groups.io <iphi@...>
Cc: [email protected] <[email protected]>
Subject: Re: [HP-Agilent-Keysight-equipment] how to convert HP83711B to 83712B!
?
"tom_iphi via <iphi@...> writes:

> Hi folks,
>?
> I have converted my HP83711B signal generator into an HP83712B and
> have added options.
> See here how I did it:
>
>
> Maybe useful to someone or just fun to read.

Thanks a lot, very interesting read!

I also upgraded my 83752B with a 24V step attenuator, while the original
one uses 15V. Also seems to work fine.

One the 8375X series, there's a attenuator calibration table to
compensate each attenuator setting. Does the 8371X have such tables?
 

¿ªÔÆÌåÓý

Nice work!? The 83712Bs are less common and more expensive, so that¡¯s a very worthwhile upgrade.? I can see how the empty space reserved for the low-band board was an irresistible temptation.

?

And thanks for the heads-up on the Skyworks diode.? HP failures are one thing, but those guys evidently had an HR failure¡­

?

-- john, KE5FX

?

From: [email protected] <[email protected]> On Behalf Of tom_iphi via groups.io
Sent: Saturday, May 17, 2025 2:03 AM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] how to convert HP83711B to 83712B!

?

Hi folks,

?

I have converted my HP83711B signal generator into an HP83712B and have added options.

See here how I did it:

Maybe useful to someone or just fun to read.

?

Tom
 

On Sun, May 18, 2025 at 01:02 PM, Sven Schnelle wrote:
One the 8375X series, there's a attenuator calibration table to
compensate each attenuator setting. Does the 8371X have such tables?
Yes it does, and I did re-calibrate them as described by Staffan's document.
?
Tom
 

On Mon, May 19, 2025 at 04:30 AM, Ed Marciniak wrote:
I wonder if a dump of the EPROMs would show any interesting SCPI strings that might involve writing to the EEPROM so the coefficients could be written without disassembly while also calculating the checksums.
Indeed, there are such SCPI strings but I couldn't get them working properly as the arguments for those commands are unclear. I did write a software which allows to modify a given EEPROM binary which also automatically updates the checksums. If useful I can upload it.
?
Tom

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