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HP 8702D OPT 011 conversion to 6GHz

 

Hello,

I bought an 8702D which I didn't receive yet and I am doing some research in the meantime for the Test Set compatibility and also OPT 006 for a 6GHz upgrade.

From my understanding if I buy the 85047A Test Set I will not be able to use the doubler in the Test Set because it needs a 6GHz source inside the 8702D. Practically the doubler is not used at all for the 8753D/8702D. I don't understand how exactly it will work, when I will use the 6GHz band, it will show that via the LED on the front panel but it will not include the doubler in the RF path? Doubler will be included in the RF path only if the VNA is 8753A/B/C model?

So now I am looking to replace the source module and I found different modules but I am not sure which one is compatible. I don't want to buy something that will not be compatible since these are not cheap.

- 08753-60146 (08753-69146) this one seems to be a 6GHz source but it is used in 8753E/ES. Seems to use the same YIG and VTC Oscillator but it has some attenuator attached to the assembly. Form factor seems to fit.

- 08753-60003 (08753-69003) this one seems to be also a 6GHz source and I found that this was used in 8753A/B/C/D ?! Is this correct? This one has 2 PCBs stacked and there is no attenuator. It has an assembly that seems to contain ALC/LVL modulator, mixer, amplifier, etc.

Do you know if there other source assembly part numbers that I can search for and what is the compatibility with the 8702D?

As for the Test Set from what I read there are 2 versions of the 85047A, the older model with coaxial switch and the newer one with the solid state switch, newer one has prefix 3033A and the older one has prefix 2729A. Do you know other prefixes for the two versions?

Regards,
Razvan
Re: Agilent E8357A Network Analyzer Phase Lock Lost Error

 

Great. That at least rules out the divide by 2 counter.?
Need to take a look again at your notes.?
Re: Agilent E8357A Network Analyzer Phase Lock Lost Error

 

"The Specification of frequency accuracy is +- 1ppm. However, this test typically adjusts to +-0.01ppm' .
Re: Agilent E8357A Network Analyzer Phase Lock Lost Error

 

Ratio is 2.0000
But as you said 10MHz is way off. Manual says should be capable of 0.01 hertz ,
HP 54503A Memory address error

 

Hi All,
Has anyone seen and fixed this error before I pull the case?
Thanks
Chris
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Re: HP8510C "system bus address error", but then it works

 

Also check RF Switch address. It must be 31 if you havent switch. Wrong address cause "System bus error" message. 
[System][F2=HP-IB Addresses][F6=RF Switch]=31
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Agilent/Keysight AWG 33250A /33220A CAL

 

hello everyone Bonjour a tous...

This fine 80 MhZ AWG (circa 2016) needs a full calibration

similar to the 33220A 20 MhZ.

Do either of these generators, use a back up battery or NV ram that can lose the calibration Constants over the years?

Can calibrate in a few hours?

Any tips or experience (on either part number) is appreciated.

Bon Soiree

jon

33250A.jpeg

Re: Agilent E8357A Network Analyzer Phase Lock Lost Error

 

And your reported 10 . 000447 MHz? results in error still.... Yes place your counter into?
ratio mode to properly address counter faults...
Re: Agilent E8357A Network Analyzer Phase Lock Lost Error

 

I suggest you place your counter into the RATIO MODE.? What I am addressing is rule out a faulty divide
by 2 counter.? ?Since this a significantly robust phase lock synthesizer system, makes sense to try to rule
out simple fundamental elements.?
Re: Agilent E8357A Network Analyzer Phase Lock Lost Error

 

¿ªÔÆÌåÓý

That is pretty bad. An ovenized crystal oscillator should be able to do at least 10^-7. ¨C Mike

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Mike B. Feher, N4FS

89 Arnold Blvd.

Howell NJ 07731

908-902-3831

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From: [email protected] <[email protected]> On Behalf Of Johnny10 via groups.io
Sent: Sunday, May 25, 2025 1:04 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Agilent E8357A Network Analyzer Phase Lock Lost Error

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Actually measuring again with a counter I come up with 10.000447

Not to say my equipment is perfectly accurate.

?


Virus-free.
Re: Checking an 8402B Calibrator

 

It might be simpler to put a 100M ohm resistor in series with the high input on the 34401A in the High Z mode. Your 17.8V reading will now be 8.9V well inside the 10V limit for the 10V, 100M ohm impedance range. If required you can calculate the exact division ratio and correct your reading accordingly.

Don Bitters
Re: HP8510C "system bus address error", but then it works

 

¿ªÔÆÌåÓý

?Marko,

The system may have been set up to use two sources and it¡¯s looking for the second source. Try:
Instrument State <Recall><More><Factory Preset>

Regards,

Steve



On May 25, 2025, at 2:14?PM, Marko Cebokli via groups.io <s57uuu@...> wrote:

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Got my hands on a 50GHz 8510C with test set and source, everything mounted in a mobile rack with a pullout table.
When I switch it on, it says "caution: system bus address error", but them it proceeds to function OK.? Both the test set and source respond to commands. I have checked the addresses, and they are set as specified in the manual, both on the instruments and in the HP-IB setup menu.
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Not much of a problem, since I can use the analyzer, just a bit annoying. Any idea how to fix this?
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Marko Cebokli
HP8561E Jittery Display

 

Hi, I've some HP specans just obtained as BER items from a local space communication site.
The first one I'm looking at is an HP8561E, it powers on OK and the display is bright but the text is jittery and almost unreadable.
I'm guessing "check out the PSU, Paul" is the way to go but does anyone have any insight on this model/fault they might like to share?
I'm also looking for component level schematics etc.
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The other items I have are all HP859x series.
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Any info welcome thanks
Paul
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HP8510C "system bus address error", but then it works

 

Got my hands on a 50GHz 8510C with test set and source, everything mounted in a mobile rack with a pullout table.
When I switch it on, it says "caution: system bus address error", but them it proceeds to function OK.? Both the test set and source respond to commands. I have checked the addresses, and they are set as specified in the manual, both on the instruments and in the HP-IB setup menu.
?
Not much of a problem, since I can use the analyzer, just a bit annoying. Any idea how to fix this?
?
Marko Cebokli
Re: Agilent E8357A Network Analyzer Phase Lock Lost Error

 

Actually measuring again with a counter I come up with 10.000447
Not to say my equipment is perfectly accurate.
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Re: HP 8902A Measuring Receiver

 

Hey there Raymond,
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I've done a little futzing with the power supply and the input amp on my 8902, so I'm happy to try and help where I can.
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I think you might get more traction on the group if you describe the problem you have and see who might have ideas about how to address.
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TonyG
Re: Agilent E8357A Network Analyzer Phase Lock Lost Error

 

Are you saying 4.999756 is in error?
Re: ftp.agilent.com tar-file on archive.org

 

I have been downloading files with "wget" for many years, but never used the "-c" option (I guess as long as one just downloads "regular" size files, it doesn't matter that much).
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It worked like a charm! Thank you for the tip.
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Best,
Wolfgang
KI7PFX
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On Thu, May 15, 2025 at 05:23 PM, Wolfgang Schraml wrote:

Thanks. I'll give that a try.
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Wolfgang
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========================================
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On Thu, May 15, 2025 at 01:05 PM, Razvan Popescu wrote:
I download the whole archive a few years ago. I also had issues with the
download at that time but it was easy to resume the download because I
started it using "wget".

If you don't have a Linux box you can use the wget for Windows in a
Command Prompt window.

You can download from here the latest wget binary for Windows.



Use the following command:

wget -c


Best regards,
Razvan

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Re: Agilent E8357A Network Analyzer Phase Lock Lost Error

 

Why is the 5 MHz in error, while the 10 MHz is correct??
Re: Checking an 8402B Calibrator

 

Tony,
If you have or can borrow one, the Fluke 8840A does High-Z up to 20Vdc.
--John Gord
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On Sat, May 24, 2025 at 09:03 PM, Tony Goodhew wrote:

Thanks, Jim & Charles - Appreciate it.
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Where I find myself is that the 8402B manual says to look at a voltage that is around 17.8 Vdc above the -30V rail (Section 5-7 in the manual) - This pushes my 34401A into the 100V range, which means it is only 10Mohms input impedance (there are two measurements that are here, otherwise I can just use the 10G setting and do the other ones) - This is why I think I need to implement a voltage follower with an OpAmp to get the >100M input impedance.
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Having never done this before, I'd love guidance from anyone who has done this or worked with the 8402 - Coming back to the reason I'm asking is that I have a 431C which was broken and I think I've fixed it but I sort of need the 8402 to confirm that I have done that (Old lady swallowing fly and all).
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Thanks,
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TonyG
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