I would LOVE a copy of this...
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From: W6KX <w6kx@...>
Date: 2/7/24 8:02 PM (GMT-06:00)
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I have an HP produced demonstration video which includes usage of the11807A? NA FM tests.
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Looking for spectrum analyzer boards for the HP 8920A
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I have two 8920A:s where one is working perfect and the other one fails on the RF Diag tests for the spectrum analyzer module:
I have seen this issue before on other units and replacing the SA module helped. My next step is to use the SA module from my working unit to verify that it is indeed the SA module in the failing unit that is causing this.
So, I am looking for used but working SA modules for the HP 8920A and I have seen that they are available with various part numbers such as:
08920-61026 (this is the one in my 8920A)
08920-61101
08920-61852
Preferably with the calibration card if available.
I am located in Sweden.
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Re: HP8920A, HP 11807A,E Option 001 card
Youtube with a private link would work.
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On 8 Feb 2024, at 08:38, Hank Riley via groups.io <n1ltv@...> wrote:
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Mike,
Thanks, but no place in this Groups.io is the right place for a file that big.
I think we have a member who is hosting that same file but I can't confirm positively because my download speed is too slow.? It is described as HP?Instructional Video.
If what you have is different from the above I'll be in contact with you by direct email about what to do next with the big video file.
Hank
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On Wednesday, February 7, 2024 at 09:02:54 PM EST, W6KX wrote:
I have an HP produced demonstration video which includes usage of the11807A? NA FM tests.? [snip]
Would there be a preferred place to post this file?? Perhaps in the folder containing the 11807A files?? Is this file prohibitively large to post here?
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Re: HP8920A, HP 11807A,E Option 001 card
Mike,
Thanks, but no place in this Groups.io is the right place for a file that big.
I think we have a member who is hosting that same file but I can't confirm positively because my download speed is too slow.? It is described as HP?Instructional Video.
If what you have is different from the above I'll be in contact with you by direct email about what to do next with the big video file.
Hank _______________________________________
On Wednesday, February 7, 2024 at 09:02:54 PM EST, W6KX wrote:
I have an HP produced demonstration video which includes usage of the11807A? NA FM tests.? [snip] Would there be a preferred place to post this file?? Perhaps in the folder containing the 11807A files?? Is this file prohibitively large to post here?
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Re: HP8920A, HP 11807A,E Option 001 card
I have an HP produced demonstration video which includes usage of the11807A? NA FM tests. It was likely transcribed from a Betamax format.? It is a 461MB .wmv file and addresses the FM tests at roughly the 44:00min. mark.
Would there be a preferred place to post this file?? Perhaps in the folder containing the 11807A files?? Is this file prohibitively large to post here?
Mike
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Re: HP8920A, HP 11807A,E Option 001 card
I have some info on this which is too large to attach all together. Trying this now in pieces.
Mike
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Re: HP8920A, HP 11807A,E Option 001 card
Hi Andy,
?? I have not used the NA FM tests. My only suggestion would be to go to the Keysight web site, search for 11807A opt 001 and you should be able to download the manual for it.
Rick
On 1/17/2024 2:43 PM, Andy wrote:
Hopefully, someone with knowledge of using the NA_FM Tests can help with error I get when running the tests. On several of the TX tests an error message is displayed:
? ? ? ? ? ? ? ? ? ? ? ? ? ? ?"Deviation would not set to 1.5kHz"
The tests this is displayed on are:?TX Modulation Limiting,?TX Microphone Sensitivity and?TX Audio Distortion.?
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Re: Adjustment of the power reading on the HP 8920A
If you want further attneuator calibration for 892x power meter
In the group files section is a folder called Attenuator Calibration. It has generic calibration files for 6/14/16/20dB & a program that installs. If you use a editor, you'll be able to see what differences there are in those files and make a custom attenuator file for your kit...
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I have rev D, but didn't upload it because you normally have to purchase this document. Since it is an official specification, I believe it should be freely available, but that's not the way it is. When even laws are locked up behind a paywall, what are you going to do?
For the nitty gritty details, the TIA-603 spec is the document to read. The Harris document simplifies things, and gives you a step-by-step procedure.
BTW, the Harris document was originally obtained from their website, so there shouldn't be any problem distributing it. I even have a hard copy that they gave me years ago.
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The automated test routines that you can run are useful. If you don't have the software, or you want to learn how to do it yourself, the standard "TIA 603-D-2010" will tell you more than you wanted to know. That document is difficult to obtain. Here is a simplified document that walks you through the tests. Harris makes this freely available, and even gives you a hard copy when you take the class.
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Re: Adjustment of the power reading on the HP 8920A
To boost that -10 dBm tester as decribed in the documentation, you can buy an inexpensive RF amp on amazon, ebay, etc. See this page for details: I bought two of the same design, but different layout. The square one did not sit flush onto the heat sink. Some grinding fixed that. The rectangular one did sit flush. Both performed almost the same. From 9-12 V, you'll get about 30 dB gain (or more), depending on input frequency. Of course, you'll also get lots of harmonics, so a LPF is needed. These modules are sold as 2-3 W, but are really only good for 1 W, unless you want to burn it up. With 0 dBm input and the correct voltage, you'll get 1 W out (harmonics included). Also, my two modules worked up to 700 MHz, then the output fell off rapidly. Here is a picture of the two that I bought: 
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Re: Adjustment of the power reading on the HP 8920A
Look here, and scroll down for RF power reference:
I built one years ago, and my HP8920B showed -10 dBm, within less than 1 dB. I gave it away, so I may have to build another one.
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Re: HP8920a 11807A NA_FM Tests
It would seem the 11807A NA_FM tests Option 001 were written around "wide band" radio specs 20K0F3E and 16K0F3E where radio test deviation was set to 60% of system deviation of +/- 5.0 KHz. ( 60% of system deviation = +/- 3 KHz) If you are testing a narrow band radio of +/- 2.5 KHz (11k0F3E) then?60% of system deviation would be 1.5 KHz.
It seems a rewrite of the SW might be in order for folks insisting to use it on commercial part 90 equipment. Note it has been a while since I have used it and narrow band did exist before the FCC mandate so there might be a setup option in the SW.
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My use is ham/GMRS so no concern.
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Re: HP8920A, HP 11807A,E Option 001 card
Does the hand held go into transmit when you run the test?? Have you tried transmitting while the HP is set up in the transmit mode to see if you can hear the tone on another receiver to make sure the hand held is actually being modulated by the HP?
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Ralph ku4pt
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Re: HP8920A, HP 11807A,E Option 001 card
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Hi Ralph,
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Yes, I am testing several hand held radios. I made up an adapter to plug into the Kenwood style speaker mic two plug connector. Speaker audio from radio connects to the 8920a Audio in High and mic audio from the radio connects to the 8920a Audio Out.
On Sunday, January 21, 2024 at 09:39:46 PM EST, Ralph wrote:
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When you did the last tests did you have the audio from the HP going in to the transmitter mic input?
Ralph ku4pt
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Re: HP8920A, HP 11807A,E Option 001 card
When you did the last tests did you have the audio from the HP going in to the transmitter mic input?
Ralph ku4pt
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On Sunday, January 21, 2024 at 04:39:58 PM EST, Andy wrote:
Hopefully, someone with knowledge of using the NA_FM Tests can help with error I get when running the tests. On several of the TX tests an error message is displayed:
? ? ? ? ? ? ? ? ? ? ? ? ? ? ?"Deviation would not set to 1.5kHz"
The tests this is displayed on are:?TX Modulation Limiting,?TX Microphone Sensitivity and?TX Audio Distortion.?
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Re: HP8920A, HP 11807A,E Option 001 card
Thanks, rab
I did purchase the option 001 card from ebay.? It came with a few other cards I have no use for. ( HP 11807A Options 004, 010, 042, 043 and 044) and two other cards, HP 83204 and HP 83236A. If anyone has a use for any of these cards I will let them go at a reasonable ???? price.
Hopefully, someone with knowledge of using the NA_FM Tests can help with error I get when running the tests. On several of the TX tests an error message is displayed:
? ? ? ? ? ? ? ? ? ? ? ? ? ? ?"Deviation would not set to 1.5kHz"
The tests this is displayed on are:?TX Modulation Limiting,?TX Microphone Sensitivity and?TX Audio Distortion.?
Any help with this will be greatly appreciated.
Andy
AE8J
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HP8920a 11807A NA_FM Tests
I'm hoping someone with knowledge about using the 11807A NA_FM tests Option 001 card can provide some advice.
Several of the TX tests; namely; Test 4 TX Modulation limiting, Test 5, TX Audio response and Test 6 TX Audio distortion all fail with a message "Deviation would not set to 3 kHz"
Looking through lots of documentation I can't find any reference to this fault message.
Andy
AE8J
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Re: HP8920 displaying over 1.5 MW!!!
I am sure the scaling to the higher levels was intended with external attenuators ...just did that yesterday when doing a quick bench? of some high power ( 110 Watt ) devices ...used a 30db 100 Watt external attenuator .? ?The 8920's made that very easy to offset the power level in and out in the config screen ....wish more instruments had that feature ....Aeroflex finally added some capability on later versions.
I'm sure you are aware that the CLIP out the is for the older version parts and will not exactly align with the later vintages they used.? Close enough to still help but not exact.
If the RF I/O control is bad at least the calibration on that module will still be close.
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Chris, ZL1CVD
RFI-EMI-GUY