Hi
Did you have any success with that eeprom hacking ? Im faceing same issue now. I have 54720A unit with lost mainframe calibration. It's crazy difficult to get this calibration plugin. I also have 54712A plugin, i will try to get programmer in next couple of days and do some comparation between those plugins binaries. Please let me know if you have any hints/ideas.?
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Re: YTO from 8595E in 8561E
Hello there are you able to choose frequencies above 2.9Ghz otherwise it may have forgotten that it is a HP8561E and thinks it is a 8560E. Other problems might be the Switch that alter the input signal to the low and high band mixer section. I think that happens
internally in the YIG tuned Filter. There should be a switch signal. Chack if the voltages changes on the pins for switch.
If you get no error like ERR334 or ERR301 the YTO loops should be ok.
best regards Peter OZ1LPR
Hello!
I was place 5086-7903 YIG into my 8561E instead of bad 5086-7906 and made YTO adjustment procedures from service manual.
There is no errors after reboot, but I can see signals till 2.89GHz only.
Can anoyone tell me please what is wrong?
Best regards,
Roman.
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Just wanted to point out that the HP3851A is pretty cool after all these years..
I am testing a battery protector for LiFePO4. It measures individual cell voltages from a stack of four cells and cuts out if any of the cells fall under or goes over a preset value. The 44702 + 44711 lets me measure all cell voltages and the voltage over the shunt over time when testing charging and discharging. Data is sent over GPIB to Excel.
If anyone has one of these, then I have some collected program snippets here:?http://www.dalton.ax/hp3852A/
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Re: 3325A Function Gen, where is the RMP test jumper?
Nope, apologies, it's a Rev C board - I was mistakenly looking at the attenuator board silkscreen.
Tony
Jared,
Attached is a picture of my Rev B A14 board.
Regards
Tony
Alrighty, I dug things out and opened it all up. Here is what I have.
Two 3325A with the following serial prefixes:
2512Axxxxx
2512Axxxxx
I also have a third spare A14 board but it is the same revision with no jumpers too.
All are Rev C A14 boards with no jumpers I can see around U34, unfortunately I haven't come across a different version of the A14 board yet.
My manual is 03325-90002, I wonder if there is either an earlier than the afore mentioned 90001 manual or a later one than my 90002 (assuming the numbering is in chronological order etc) that omits the RMP/jumper instruction?
Here are pictures of the three A14 boards I have:
It seems there must be a few revisions of this board with varying amounts of jumpers?
If anyone else can take photos of their A14 boards that are different to my pictures above and also the revision number and serial prefix, it might help narrow down these variants and the adjustment instructions.
Thanks!
Jared
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Re: 3325A Function Gen, where is the RMP test jumper?
Jared,
Attached is a picture of my Rev B A14 board.
Regards
Tony
Alrighty, I dug things out and opened it all up. Here is what I have.
Two 3325A with the following serial prefixes:
2512Axxxxx
2512Axxxxx
I also have a third spare A14 board but it is the same revision with no jumpers too.
All are Rev C A14 boards with no jumpers I can see around U34, unfortunately I haven't come across a different version of the A14 board yet.
My manual is 03325-90002, I wonder if there is either an earlier than the afore mentioned 90001 manual or a later one than my 90002 (assuming the numbering is in chronological order etc) that omits the RMP/jumper instruction?
Here are pictures of the three A14 boards I have:
It seems there must be a few revisions of this board with varying amounts of jumpers?
If anyone else can take photos of their A14 boards that are different to my pictures above and also the revision number and serial prefix, it might help narrow down these variants and the adjustment instructions.
Thanks!
Jared
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Re: 3325A Function Gen, where is the RMP test jumper?
Alrighty, I dug things out and opened it all up. Here is what I have.
Two 3325A with the following serial prefixes:
2512Axxxxx
2512Axxxxx
I also have a third spare A14 board but it is the same revision with no jumpers too.
All are Rev C A14 boards with no jumpers I can see around U34, unfortunately I haven't come across a different version of the A14 board yet.
My manual is 03325-90002, I wonder if there is either an earlier than the afore mentioned 90001 manual or a later one than my 90002 (assuming the numbering is in chronological order etc) that omits the RMP/jumper instruction?
Here are pictures of the three A14 boards I have:
It seems there must be a few revisions of this board with varying amounts of jumpers?
If anyone else can take photos of their A14 boards that are different to my pictures above and also the revision number and serial prefix, it might help narrow down these variants and the adjustment instructions.
Thanks!
Jared
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Re: 8753D Unwrapped Phase
I'm measuring a two port coupling assembly, with two female N's
on it. When
measuring the length I'm seeing about a 2 degree difference
between s11 and
s21. This seems like a large error to me.
Is there a better way to do this?
Hi.
Late to the party on this one.
I guess that difference depends on just what the "DUT" is.? S11
being reflection, so will be a function of the input impedance of
it.? While S21 is of course transmission, so as well as the above
having some influence, all the other internal through path stuff
comes into play.
When I'm tuning rebuilt broadband power amplifier modules (80MHz
- 1GHz) at work, where up to 32 of them all have to huff-n-puff
together in phase, to sum up to 1kW out.?? I've found it easier
now to use the group delay measurement display, and only the
actual phase for the last final check.
Learnt that some time ago, after one torrid experience where the
"Phase" at 1GHz was fine, but there was still a dip lower in the
overall frequency response that pushed the overall amp flatness
response just out of spec.
Eventually, we found one module in a driver was "different",
swapped it with a spare and all was good, and kept the customer
happy.
After talking at length with the US designer (back then, I could
call & talk direct to whoever I wanted, whenever I needed to)
he suggested checking the group delay if we had an analyser that
could do that.? We found that both instruments we had at the time
could do so, after exploring the measurement display format menu
some more.
Since then, it has been so much quicker and easier to do that,
especially with an instrument that doesn't do an "Unwrapped Phase"
display, plus the group delay is largely a horizontal(ish) line
end to end with those modules unless something is bad.?? Just have
to be careful to use "The Good" RF Test cables!? And not move
things too much when changing modules.
Oh yes, the cause of the original problem.? During a previous
repair (it was suspected.)? The wrong RF devices (for that
generation of module) had been installed.? OK for power/gain vs
frequency, but the matching on the input and/or output must be
different.? Replacing them with the correct type, and all was good
again.? Sadly, they had the same house part number, but were from
a different manufacturer, so an easy point of confusion.
Happy New Year to All.
Dave G8KBV.
--
Created on and sent from a Unix like PC running and using free and open source software:
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Re: 3325A Function Gen, where is the RMP test jumper?
I happen to be at the lake this weekend, where my 3325A and a paper manual reside. I don't know if my 3325A matches the manual (90001), but the manual shows on A14, there is a jumper or connector of some sort P31/J31 adjacent U34 - just below it on the board diagram fig 5-2, p 5-7/5-8. From the picture, I'm guessing it's a four-pin header, with the rightmost pin the test point "RMP TP 20," and the left three pins are a connector or shorting plug location.
The text alludes to making some measurements, and possibly leaving the jumper (or shorting plug) in the alternate position, if it works better, so i think it may show schematically as something bypassing or selecting a component out of more than one, rather than explicitly as a test mode. This may cause some confusion between the schematic labels, the adjustment procedure, and the actual function.
Ed
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Re: HP11758B Digital Radio Test Set
On Sun, Jan 2, 2022 at 09:07 AM, David Buhler wrote:
It is a shame that set pieces are separated and sold/ distributed.?
I have a few power meters all without the sensors, prices are ridiculous on many sell sites for "parts" only sensors.??
Hi All: Okay... the first part I'd blame what I call 'speculators' ... many of whom are on this list... or lurk it. For the second part... I wouldn't blame hams... well okay... I would blame hams... okay, some hams. It used to be a popular past-time for them to buy, for instance... an 8481D ( 10 uW tops, for any reasonable time)...for their cheaply acquired HP power meter... and then hook it up naked to their 100W transceiver. (There's guys posting... admitting to it.) Of course, sellers got tired of being held accountable for the actions of people who didn't know a pico-watt from a p ... destroying one sensor, only to ask for another... to destroy that too... or to demand money back because it was dead. So now, its 'parts only" ... or "for repair only." To which if one has any sense... one has to ask oneself.. parts?...parts for what? ... and... "for repair" ... one can't repair them. I wrote one Ebay seller to ask why he's selling these things "for repair" ... as he knows full well people can't. He said, Yes... he knows that... but, people buy them.
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Re: 3325A Function Gen, where is the RMP test jumper?
On Sun, Jan 2, 2022 at 07:32 AM, Jared Cabot wrote:
This one is a trimmer capacitor (C110) labelled RMP on the PCB
Ok. What's going on between U34 and U35 around R101? There is TP RMP ... looks like AMP? ... but, there is no TP AMP on A14?? ... just AMP OUT, in a different location.
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Re: HP Vacuum Fluorescent Display (VFD) Troubleshooting Help Needed: FIXED!
Problem solved! It makes perfect sense in retrospect, but I certainly didn't expect that the problem would be what it turned out to be.
Cut to the chase: It turns out that the replacement VFD also had a defective segment E pin! I looked very carefully after I removed it for testing, and I saw that there was a horizontal crack in the glass on the rear of the VFD across pins 1 through about 4 or 5. Pin 3 is the segment E pin, so it was just an unusual coincidence that the new one had failed in exactly the same way as the old one.
Segment E was definitely okay when I tested it before installation. I figure that the heat and/or mechanical stress of soldering it onto the display PCB must have made the the trace go open circuit, since Segment E was definitely not okay when I removed the VFD for testing.
The good news is that I had one more VFD display module that I installed and everything is working as it should.
Thanks, Adrian, for the advice!
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Sphere's Stuff Season closes January 31st
Please drop by and have s look:
https://www.sphere.bc.ca/test/stuffday.html
?
I have added some very cool design kit assortments int? e Surprises and RF sections, really
worth a look. The HP ones are incredibly RARE!
?
We will close the page at month end, and re-build it for 2022, it takes about a month to refresh it all.
many items will disappear, and new ones will get posted. Now is the time to send me any special requests,?
we are happy to fill them if we can, as there's still TONS of stuff here at Sphere to clear out.
?
Many thanks to everybody that has helped us clear out this inventory, Susan says THANK YOU!
all the best, and hoping for a better 2022 ahead,
?
walter (walter2 -at- sphere.bc.ca)
sphere research corp.
https://www.sphere.bc.ca/test/index.html
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Re: 3325A Function Gen, where is the RMP test jumper?
Looking at the schematics in the 90002 manual, I did not see the ‘jumper’ or ‘shorting wire’ either. ? If needed, I can open my 3325A and take some pictures of my A14 board. ? Joe ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of J. L. Trantham
Sent: Sunday, January 02, 2022 12:05 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] 3325A Function Gen, where is the RMP test jumper?? What is the serial prefix of your 3325A?? What is the part number of your manual? ? I’ve attached pages 5-1 – 5-6 of manual 03325-90001 where there is no mention of ‘RMP’, only ‘shorting connector’.? 03325-90002 mentions RMP. ? Perhaps your unit is older and has wires as a ‘shorting connector’ instead of ‘jumpers’.? My unit has a number of wires as ‘shorting connectors’. ? Hope this helps. ? Joe ? From: [email protected] [mailto:[email protected]] On Behalf Of Jared Cabot via groups.io
Sent: Sunday, January 02, 2022 9:32 AM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] 3325A Function Gen, where is the RMP test jumper? ? On Sun, Jan 2, 2022 at 11:37 PM, Roy Thistle wrote: Maybe not... but, it looks to me....
Between U33 and U36 on A14 03325-68514 Rev C
... also it could be mistaken? as "AMP ADJ" because of bad? silk screening.
Just the same, "Designator" RMP is given in "Board Location" D ... and that's what's there. This one is a trimmer capacitor (C110) labelled RMP on the PCB, which is what I need to use for this jitter adjustment, but the location of the mentioned RMP jumper is proving somewhat elusive..
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Re: HP 8601A 100 kHz to 110 MHz Generator / Sweeper
On 1/2/2022 7:38 AM, Christopher Tucker via groups.io wrote: All,
I am looking for an hp 8601A Sweeper, specifically with OPT 007. Other options are welcome but I would like to keep the output impedance to 50 Ohms. Christopher, I have one that I'd be glad to get part with, late model, grey not blue case and with IEC power connector, 50 Ohm but no options that I can see.? It does not have the white numbers falling off the dial like most old ones have (see eBay pic). Also I replaced the incandescent bulbs for the decimal points with LEDs since the light pipes had darkened and the bulbs were not bright enough.? Works. Dan - ac6ao
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Re: 3325A Function Gen, where is the RMP test jumper?
What is the serial prefix of your 3325A?? What is the part number of your manual? ? I’ve attached pages 5-1 – 5-6 of manual 03325-90001 where there is no mention of ‘RMP’, only ‘shorting connector’.? 03325-90002 mentions RMP. ? Perhaps your unit is older and has wires as a ‘shorting connector’ instead of ‘jumpers’.? My unit has a number of wires as ‘shorting connectors’. ? Hope this helps. ? Joe ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Jared Cabot via groups.io
Sent: Sunday, January 02, 2022 9:32 AM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] 3325A Function Gen, where is the RMP test jumper? ? On Sun, Jan 2, 2022 at 11:37 PM, Roy Thistle wrote: Maybe not... but, it looks to me....
Between U33 and U36 on A14 03325-68514 Rev C
... also it could be mistaken? as "AMP ADJ" because of bad? silk screening.
Just the same, "Designator" RMP is given in "Board Location" D ... and that's what's there. This one is a trimmer capacitor (C110) labelled RMP on the PCB, which is what I need to use for this jitter adjustment, but the location of the mentioned RMP jumper is proving somewhat elusive..
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Re: HP 8601A 100 kHz to 110 MHz Generator / Sweeper
That particular one is not Option 007, but looking at the schematic, it doesn’t appear to be complicated, just bring out the link to BNC connectors.
?
Dave Wise
?
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Show quoted text
From: [email protected] < [email protected]>
On Behalf Of Mike Feher via groups.io
Sent: Sunday, January 02, 2022 9:28 AM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 8601A 100 kHz to 110 MHz Generator / Sweeper
?
Here you go –
?
73
– Mike
?
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell NJ 07731
848-245-9115
?
?
All,
I am looking for an hp 8601A Sweeper, specifically with OPT 007. Other options are welcome but I would like to keep the output impedance to 50 Ohms.
I am contemplating a recreation of the spectrum analyzer "lazing in the grass" with the 141S Display Section, as illustrated in the August 1968 edition of the Hewlett-Packard Journal.
Any advice or experience to share with this setup is also welcome.
Christopher Tucker
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Re: HP 8601A 100 kHz to 110 MHz Generator / Sweeper
Here you go – ? 73 – Mike ? Mike B. Feher, N4FS 89 Arnold Blvd. Howell NJ 07731 848-245-9115 ?
toggle quoted message
Show quoted text
From: [email protected] < [email protected]> On Behalf Of Christopher Tucker via groups.io Sent: Sunday, January 2, 2022 10:38 AM To: [email protected]Subject: [HP-Agilent-Keysight-equipment] HP 8601A 100 kHz to 110 MHz Generator / Sweeper ? All,
I am looking for an hp 8601A Sweeper, specifically with OPT 007. Other options are welcome but I would like to keep the output impedance to 50 Ohms.
I am contemplating a recreation of the spectrum analyzer "lazing in the grass" with the 141S Display Section, as illustrated in the August 1968 edition of the Hewlett-Packard Journal.
Any advice or experience to share with this setup is also welcome.
Christopher Tucker
|
Re: HP11758B Digital Radio Test Set
Hey Roy
I searched Keysight but it was for the 11758b, not V? but I now have that V document and it seems to have the information, THANKS!!
Yes, I only have one piece of the set but I have some other Spectrum Analyzers I can use for the signal source for setup.? It is a shame that set pieces are separated and sold/ distributed.? I have a few power meters all without the sensors, prices are ridiculous on many sell sites for "parts" only sensors.??
Thanks, Stephen for the manual # offer, if I find I need more I will contact you
David
VE6RKT
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Re: YTO from 8595E in 8561E
Hello!
I was place 5086-7903 YIG into my 8561E instead of bad 5086-7906 and made YTO adjustment procedures from service manual.
There is no errors after reboot, but I can see signals till 2.89GHz only.
Can anoyone tell me please what is wrong?
Best regards,
Roman.
|
HP 8601A 100 kHz to 110 MHz Generator / Sweeper
All,
I am looking for an hp 8601A Sweeper, specifically with OPT 007. Other options are welcome but I would like to keep the output impedance to 50 Ohms.
I am contemplating a recreation of the spectrum analyzer "lazing in the grass" with the 141S Display Section, as illustrated in the August 1968 edition of the Hewlett-Packard Journal.
Any advice or experience to share with this setup is also welcome.
Christopher Tucker
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Anders
Jared Cabot
Christopher Tucker
