Re: HP 1727A CRO: Problem with the vertical output amplifier.
On Wed, Feb 23, 2022 at 07:53 AM, Alex_03 wrote:
This is what I got.
pin 3: 13.80V
pin 4: 13.05V
pin 5: 13.06V
pin 6: 13.83V
pin 12: 27.5V
pin 13: 27.77V
----------------- Most likely U1 is good. You have one Vbe drop from pins 3/6 to pins 4/5 which is correct and collectors at pins 12/13 are balanced. In the plots you attached I thought there was an imbalance in pin 4/5 voltages but the scales are different and they match. Input section looks fine.? From a brief analysis of the output stage, pin 13 voltage swing looks too high (2.4Vpp), even pin 12 swing is high . U2 and surrounding components look like a transimpedance stage and should keep pin 12/13 swings very small. Given the signal swings, U2 is not doing its function, but it could be because of bad components around it so it doesn't mean U2 is bad for sure. I recommend looking around U2.? DC voltages at pins 2/3/5/6/7 may give clues.? Ozan
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Just keeping the 8566B in good condition in case I want to sell it.
But it's a good point - my Trimble GPSDO probably has pretty good phase noise and I probably could use it as the reference for the 8566B.
I should see how the NOS OCXO in the 8566B is doing.? The one I mentioned below is just sitting on the bench powered by a bench power?supply.
Uh, why bother with the OCXO if you have a GPSDO?
Jim Ford
Sent from my T-Mobile 4G LTE Device
-------- Original message -------- Date: 2/22/22 10:00 PM (GMT-08:00) Subject: Re: [HP-Agilent-Keysight-equipment] Storage Cap Ripple
The OCXO in my 8566B was 75 Hz out and died shortly thereafter...
I found a source of NOS OCXOs - Quest Components part?OSC92-51B-10MHZ fitted my particular 8566B.? They claim to still have a few.? They'll cost $25 (minimum line item) plus shipping... a bargain compared to other sources.
I bought some extras and have been checking them out.? The latest has settled down to 9.999 999 97 MHz compared to my GPSDO after running for a couple of months.
If Quest run out, drop me a note...
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Re: HP 8594E upgrade CRT to LCD
Beautiful story. I avoid buying any equipment with CRT displays.?
When I got my IFR 1600 service monitor, I got the version with LCD rather than CRT; 6 pounds lighter and the display will outlast me.
Stuart K6YAZ
Los Angeles, California
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This is a mailing list, not some web thingy. At least that's the way *I* access it, my mail program hits the groups.io servers and downloads this stuff...
While DSL was at one time considered "broadband", it's a poor performer compared to what some folks do with cable, etc. Unfortunately this rural location doesn't provide a whole lot of choices.
The point here is that when one of you guys attaches a multi-megabyte file to one of these emails, I get to download it whether I want it or not. Which ties up my connectivity until the download is done.
I don't mind the occasional pictures and such, but those big files are something else!
I'd appreciate it if you guys could simply put such large files where somebody can get at them, and provide a link, for those that want it, rather than forcing those of us who get things this way to download for no immediate benefit.
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, ?a critter that can
be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
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Is the software coming with it ? I allready have one but without software.
On Wednesday, February 23, 2022, 06:28:47 PM GMT+1, Steve Draper <steve@...> wrote:
Get an 85097 as others have mentioned. An ECAL is totally worth it. I used them with my 8753e when I had it. I actually still have the 85097 and cables if you're interested.?
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Get an 85097 as others have mentioned. An ECAL is totally worth it. I used them with my 8753e when I had it. I actually still have the 85097 and cables if you're interested.?
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HP 8594E upgrade CRT to LCD
Last night I upgraded the monitor on my 8594E to the NewScope LCD that you find for sale on eBay.? The SA was in good shape but you could not read the text on the monitor because of burn in and no focus. I have many years of experience in TV repair but this CRT had no hope. The install of the LCD went well, just some adjustments of the no glare screen was needed.? The new image is one thousand times better than what was there.? Some people say the price is too high for the LCD but I saw a NOS CRT for sale at the same price. I rather go to the modern LCD.? The NewScope LCD did not come with instructions. You had to go online to get them.? Also you will need the service manual to remove the old CRT and disconnect various connectors to prepare the SA for the new LCD. You have to have a iron ready to jumper a resistor on the video board with another resistor.? So the install is not plug and play.? I think I was done in a hour and a half but I was taking my time.? Did not want to mess up something.? I now have an old CRT sitting in the floor. Who wants it? Dwight??  
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Hello,
I am in this case and could never find the software for the 85097A...
On Wednesday, February 23, 2022, 05:02:53 PM GMT+1, nj902 <wb0emu@...> wrote:
The 85097A system using a PC would be very challenging to get working.? I have seen people online trying to locate the software.
The 85097B doesn't need a PC - see attached, but the manual doesn't list 8753E as a compatible analyzer - only 8753ES.
I have the 85060C.? It works well.? There are a couple listed in the $150 range.
I have two ecal modules.? One type N and the other 3.5 mm.? I got them cheap as 'not working - parts only'
Some sellers don't realize the module will show red until it warms up - about 20 minutes.
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Some time ago, due to the SYTF failure on an 8596E, the modification was proposed to transform it into 8593E, using the YTF, more available, the modification also consists of removing R485 and putting R515 (unclear), the problem is that these R in A7 card 08595-60022 do not appear.
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Re: My Agilent MSOX2024A hangs at boot. Will Keysight still repair it at no charge?
Stan,
Thanks for sharing this support experience. I have an MSOX2024A as well, and spent a couple thousand dollars on it a few years back. It was a premium used/refurbished model. I couldn't be happier with the scope, so much better than the off-brand junk being produced now.
Like many things, the cheaper ones I tried first were a WORSE value in that I wasted money that I should have just saved longer for something much better.
Thanks,
Keith
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On 2/23/2022 11:49 AM, Stan wrote: Problem fixed!
I shipped my DSOX2024A to Keysight. They received it on the afternoon of the 15th and it was on its way back to me on the 18th. It arrived yesterday and it's perfect (of course), with all of the original licenses installed, the latest firmware, and a fresh cal cert. I couldn't be happier!
Similar to Alan's experience, I believe that the only part of my original scope that was on the scope I got back was the rear panel with the serial number tag. I'm pretty sure that all of the rest of the scope is new, right down to the new Keysight label over the display (my original scope had an Agilent label).
Thanks again to Keysight for the awesome support! It's among the many reasons I will be a lifelong Keysight customer!
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Re: My Agilent MSOX2024A hangs at boot. Will Keysight still repair it at no charge?
Problem fixed!
I shipped my DSOX2024A to Keysight. They received it on the afternoon of the 15th and it was on its way back to me on the 18th. It arrived yesterday and it's perfect (of course), with all of the original licenses installed, the latest firmware, and a fresh cal cert. I couldn't be happier!
Similar to Alan's experience, I believe that the only part of my original scope that was on the scope I got back was the rear panel with the serial number tag. I'm pretty sure that all of the rest of the scope is new, right down to the new Keysight label over the display (my original scope had an Agilent label).
Thanks again to Keysight for the awesome support! It's among the many reasons I will be a lifelong Keysight customer!
Stan
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The 85097A system using a PC would be very challenging to get working.? I have seen people online trying to locate the software.
The 85097B doesn't need a PC - see attached, but the manual doesn't list 8753E as a compatible analyzer - only 8753ES.
I have the 85060C.? It works well.? There are a couple listed in the $150 range.
I have two ecal modules.? One type N and the other 3.5 mm.? I got them cheap as 'not working - parts only'
Some sellers don't realize the module will show red until it warms up - about 20 minutes.
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HP5315/5316 Option 6 question
Hi - I am curious if anyone has knowledge of the schematic/manual for the Offset/Normalizer (Option 6) for the 5315/5316A versions of the the Universal Counter.? I see that the Option 6 appears to have disappeared in the 5316B version of the counter, likely due to poor sales.? I am more curious than anything as to how the option was interfaced to the counter.? From pictures, the option was a separate unit that encased both the counter and dip switches for the option.? I have not been successful with finding the document referenced in the HP5316A manual. I would appreciate a copy of this manual if anyone is willing to share. Thanks Jim 
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Re: HP 1727A CRO: Problem with the vertical output amplifier.
This is what I got.
pin 3: 13.80V
pin 4: 13.05V
pin 5: 13.06V
pin 6: 13.83V
pin 12: 27.5V
pin 13: 27.77V
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Uh, why bother with the OCXO if you have a GPSDO?
Jim Ford
Sent from my T-Mobile 4G LTE Device
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-------- Original message -------- From: Orin Eman <orin.eman@...> Date: 2/22/22 10:00 PM (GMT-08:00) Subject: Re: [HP-Agilent-Keysight-equipment] Storage Cap Ripple
The OCXO in my 8566B was 75 Hz out and died shortly thereafter...
I found a source of NOS OCXOs - Quest Components part?OSC92-51B-10MHZ fitted my particular 8566B.? They claim to still have a few.? They'll cost $25 (minimum line item) plus shipping... a bargain compared to other sources.
I bought some extras and have been checking them out.? The latest has settled down to 9.999 999 97 MHz compared to my GPSDO after running for a couple of months.
If Quest run out, drop me a note...
Orin. ? One more quick thing - be sure the 10 MHz reference is OK, whether it's the internal OCXO, or an external source. I've had many failures of the internal reference (all oven failures) on the 8566 over the years. I've mentioned this here a number of times, and my opinion that the OCXO placement was a very poor choice, thermally speaking. It's right in the main air plenum that distributes cooling air for the whole unit, so it gets the best cooling of all, making its oven work very hard whenever the unit is running. The 8568 in contrast, has its (same model) OCXO nice and toasty, isolated in a front corner compartment.
If the reference is off frequency just a little bit - like due to oven failure - the whole system can't lock and operate.
Ed
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Thanks for sending those pictorials. This clears it up a bit for me. If that is in fact the case, then I am not sure a ecal is really worth the effort. The idea is nice, but no need to run out and buy more old H/W to support an ecal module.
Rich
On Wednesday, February 23, 2022, 10:25:22 AM EST, nj902 <wb0emu@...> wrote:
You need a controller to run the ecal module. Examples are the 85060 or 85097A.
See attached examples
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You need a controller to run the ecal module. Examples are the 85060 or 85097A.
See attached examples
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Lothar,
It probably is wired straight through. This is the situation with the serial cable on the 89441A Vector Signal Analyzer System. In that case it's a DB9 connector and is wired straight through even though the chassis/module is labeled as serial. A standard DB9 RS232 cable will not work. It confusing, but almost all HP cables are wired straight through.There are a few exceptions and some weird ones such as the MSIB cables for the 70000 instruments. Just make sure that there are no power pins from either instrument that might damage the PAL if connected incorrectly. -George
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I might have a line on a eCal Kit for my 8753E. After reviewing the manual for the eCal kit, and the manual for the 8753E I am left with a couple of questions, that the manual really did not help me understand.
There is a DB25 connector on the eCal kit. Does this simply plug right into the serial port of the 8753E. If not, how is the VNA interfaced to the eCal kit? My assumption is it must connect somehow to the instrument other than through the RF Ports, but this is not clear to me from reading the manual.
eCal kit talks a lot about specifications, and much more about mechanical tolerances, but no real interface to the instrument data. Can someone give me a brief rundown of what one might expect?
Rich
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Okay, many thanks for all the suggestions and offers of help, guys; much appreciated.
@benj3867 - Clearly this is an order of magnitude more demanding than any other bit of troubleshooting I've ever done in the past and I'm in over my head at present if what you say is correct (and I have no reason to doubt it). Two problems here: 1. I do not at this stage have a "precision mindset" (as evidenced by my failure to pick up on the? importance of narrow allowed tolerances from the stated voltages). 2. Whilst I have a ton of vintage high-end test gear, very little if any of it is listed in the HP manuals as being suitable for the kind of measurements required here. So I'm doubly disadvantaged. Whilst I could in time cultivate a precision mindset, acquiring the necessary test gear will remain a severe obstacle. On previous occasions when this kind of problem has presented, I have simply mothballed the faulty item in question and got on with other stuff until I felt I'd learned enough/gained sufficient confidence to take a fresh look at it. This technique has served me quite well in the past, too. So I'm thinking that's perhaps what I need to do at this juncture: just print out all the members' suggestions, stick them in an envelope taped to the analyser and park it up for a year or so whilst I build up my skill level further still by fixing up other stuff. Does that seem like the best approach? I can live without an RF SA for a while if I must.
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Steve Draper
Keith Monahan
Alex_03
Jinxie