3586 A22

#148518

I am looking for a working A22 Module.? It must pass CE-7 and 3-2 tests!

73,

Bill Riches, WA2DVU

Cape May, NJ

609 425 8651

Re: HP8753E -08753-60146 Intermittant source issue (low power, about 50 dB down, but sometimes OK)

#148517

Hi again,

?

now I've read the original post thoroughly and have some comments and questions.

?

Re bullet 1
So you are saying that you experience phase lock loss issues(red error message on the screen)?
Given the symptoms you describe I assume that that is what you mean.
Or is it the other way around, you do not have any phase lock issues?

?

Re bullet 5

I think 3dBm directly at YIG output sounds too low, it ought to be over 10dBm. This goes for both fixed 3.8GHz YIG LO and the 3-6.8GHz YigTunedOscillator.

?

I suspect that you have an issue with the mixer/amplifier/ALC-control module in the A3 source module, that might cause the ALC to drive the amplifier too hard due to the low YIG output.

?

I would disconnect the YTO and test it separately,? search the file area for "8753 EYO" and "EYO J9" and you will find how to hook it up. Sweep it from around 60-160mA (or what is needed to cover the frequency range) on the main coil, put the SA on max hold. Also test the YIG LO.

?

Best regards

Marcus

Re: HP8753E -08753-60146 Intermittant source issue (low power, about 50 dB down, but sometimes OK)

#148516

Hi all,

?

the attenuator can be exercised with the Operator test for port 1 & 2 (i.e. test 21 & 22).

All you need is to connect a short the port being tested. It should be enough to test one port in this case.

?

Best regards

Marcus

10MHz input board for Agilent 33220A/33250A

#148515

Dear friends,
I am in the process of cleaning and tidying up my office.
I found two remaining plug&play modules for the 33220A/332250A external 10MHz reference input.
Board design was based on a original Agilent 33220-80001 board but slightly modified.
Module have only 10MHZ BNC input connector, NO loop-back output!
Input AC coupled, 50ohm (<-20dB S11), DC "isolated" from instrument housing (1Mohm)
Input sensitivity better than -13dBm, input level for optimal jitter/phase noise 0 to 20dBm.
Asking 75 USD/EUR each with shipment within EU.
BTW, i don't have a nut for the BNC connector!

Please PM on milan.vasic@...

Milan

20241118_210927106~2.JPG

20241118_211020664~2.JPG

Re: HP8753E -08753-60146 Intermittant source issue (low power, about 50 dB down, but sometimes OK)

#148514

Is there a band switching coaxial relay in there? I assume it has a high (fundamental) and a low (down-converted) band that are switched by relays or PINs. I don't have any 8753 stuff, but have had problems with the coaxial relays in SAs. Like Matt said check the attenuator - the mechanical contacts are the weak link. Likewise, any relays if present.

?

Ed

Re: HP8753E -08753-60146 Intermittant source issue (low power, about 50 dB down, but sometimes OK)

#148513

If I remember correctly, the last time I worked on my 8753D, I also had to give some love to the step attenuator.? You might want to scrutinize that some.

Re: Wandel & Goltermann DA-30C software..

#148512

Thank you so much for the reply. I agree with Dale, what an awesome write up.

Unfortunately, I no longer have the old HDD at all. I did have it reading the platters at one point. it sounds like it was the exact same issue that you had where the arm would get stuck. but after running it up manually and while I was mid making an image the drive completely gave up.

No matter what I did I could not get the drive to read again, and it then developed issues detecting at all.

?

Just a FYI for anyone having issues with the FDD, on boot you could hear it trying to start but nothing would be detected. it ended up being the surface mount electrolytic capacitor in the FDD (There is only one) was completely out of spec. Next time I have it open I will take some photos.

?

Thanks again

?

Allan

Re: Project: S-Parameter test set for a 3577A...

#148511

I have sold my 3577A and still have the original S parameters test set, 35677A, rack mount with type N connectors. It Worked fine over full 3577A frequency range 100k....200 MHz 

Offer for sale or swap if anyone is interested, located in USA, California.

Jon

Re: Project: S-Parameter test set for a 3577A...

#148510

Hi,

?

(+) and (-) 12V external PSU. I am using SOT-89 SMD regulators in order to have +/- 5V for the OPAmps.

I guess << than 100mA.

?

I will make some corrections to the schematic/BOM and then upload the design somewhere.

?

Ulf

SM6GXV

Re: Project: S-Parameter test set for a 3577A...

#148509

Hi,

Very interesting and of course very interested by the schematic and the parts list, even for the IN/OUT connectors. Is the analyzer providing the DC supply?

Dan.

Re: Project: S-Parameter test set for a 3577A...

#148508

Greetings Forum,

?

I did find the suggested active reflectometer bridge circuit and decided to try to build one

for the now restored 3577 (LCD display purchased and installed).

The design seems to work well up to at least 65 MHz which is way above

my intended frequency? range.

?

I also added the posibillity to inject DC bias to the DUT. A few volts only, well below the 3577

safety limit. If there is any interest, I can upload the design files including Gerber/Drill data.

?

I used an old MIL-type OPAmp buffer (HA-5002) for the bias circuitry but all those parts

can be omitted. Ther rest of the parts excluding the PCB comes from DigiKey.

?

Ulf

SM6GXV

?

Re: Troubleshooting a 8591e with opt 130

#148507

开云体育

Marco,

?

For the filter alignment at 2.1214GHz, the procedure doesn't seem to work well, what I did is to measure the output at 321.4MHz, and using max hold on another Spectrum, I try to redo the curve, I adjust the controls slowly and redo the curve with max hold and I see if I improve or not, and little by little, I managed to make the curve such as the image I sent you... but it takes a long time to do. I had completely misaligned the filter, then from scratch I realigned the filter correctly. The adjustments are really very sensitive.

?

I watched the video, but in the case of my 8595E, the curve is really off screen during this alignment.

?

For the rs-232 and HPGL image, I had already made the program for another instrument. I just adapt it. If my friend finds me a Spectrum with an rs-232 option, I'll do some tests to confirm that everything is correct.

?

Yves

De?: [email protected] <[email protected]> De la part de jansen.marco90 via groups.io
贰苍惫辞测é?: 17 novembre 2024 14:52
??: [email protected]
Objet?: Re: [HP-Agilent-Keysight-equipment] Troubleshooting a 8591e with opt 130

?

So I redid the adjustments.?

Starting with the 2nd Lo output, I measured 1.8GHz at -17.1dB.

?

Next I started the 2nd converter bandpass adjustment.

Now the manual states:

8. With nothing connected to the analyzer INPUT 50 ?? press the following keys.

? ? PRESET

? ? PEAK SEARCH

? ? MKR FCTN, MK TRACK ON OFF (ON)

? ? SPAN, 10, MHz

? ? Wait for AUTO ZOOM message to disappear.

?

At that point my analyzer shows a peak at 480kHz with a level of -9.8dBm.

Then the manual states:

9. Set the analyzer as follows:

MKR FCTN, MK TRACK ON OFF (OFF)

SPAN, 0, Hz

?

At that point i'm left with a flatline at -72dBm.

But if I set the RBW to 3MHz, I have a level of -10dBm again.?

There seems to be a frequency deviation causing the signal to be gone when going to 0hz span.?

I tried to redo the adjustment with the 3MHz RBW but afterwards no signal was visible on the analyzer at all.?

I also tried to tune the bandpass filter for the 15MHz -3dB span of the second converter bandpass. Again no proper signal on the analyzer afterwards.

?

Then I did a Frequency self cal and retried the first steps, Now I did have a proper level shown with the 0hz span.?

I guess the local oscillator is tuned during the frequency selfcal and appareantly the freq selfcall is necessary for this adjustment.

?

To be fair, in the service guide the frequency cal is indeed done before this adjustment. So a nice gotcha for future reference.?Always do freq cal before 2nd converter adjustments.?

?

Now the peak is at 2.12146GHz.

I also double checked the 2nd lo output, it was 1.8000GHz -15.9dBm.

?

I retried to do the adjustment but still no great succes. If I follow the instructions exactly and do several runs to optimize I end up with nothing. The peaked signal with the A5C1 seems to work, also peaking with A5C3 seems ok. Mainly the A5C2 adjustment seems to be an issue, with A5C2 i can completely reduce the signal on the analyzer to the noisefloor, afterwards peaking it with A5C3 is impossible.?

?

For now I'll wait for the new mixer diodes, with those I'll retry.?

?

As answer to your latest reply:

On the self cal amplitude part, I found this video online:

with the amplitude cal starting at 1:50

The 3db BW cal starts around 2:25 and while still somewhat high, the levels aren't off the screen like mine. At least the -3dB point seems to be around the ref level.?

?

For the rs232 please don't put too much effort into it, this capture was done with a regular terminal program which probably ommits control characters indeed.

?

Marco

?

HP8753E -08753-60146 Intermittant source issue (low power, about 50 dB down, but sometimes OK)

#148506

Trying to repair an 8753E with a 6 GHz source module (08753-60146).? The source sometimes works fine, and other times has an output power that is 50 dB too low.? First, some symptoms:

?

1)? No phase lock issues (regardless of whether this issue is occuring or not).

2)? When the output power is low, the S11 that it shows on the default display is -20 dB.? However, the response vs. frequency is still basically flat.? Usually when it is deciding to work if I quickly power cycle the machine it still works.? Likewise, if it is deciding not to work power cycling generally does not improve the issue.? I have tried to power up the machine in different orientations and this does not seem to change the issue.? When I change the output power of the machine in the menu from 0 dBm to +15, the output tracks (i.e. goes from -51 dBm to -36 dBm).?

3)? I measured the low output power first at the front of the machine (port 1), then at the source module itself, and then at the output of the mixer phase.? In all cases I got the similar results.

4)? Tested the source module in two different machines, and the symptoms are similar so I'm pretty sure that this is related to something in the source module itself and not anything else in the machine.

5)? Tested the output power of the YIG and it seems to be fine (around 3 dBm @ 3.8 Ghz when it was trying to create the 0 dBm output).? It's impossible for me to know if this output was when the source module was working properly or not, but my assumption for now at least is that the YIG is fine.

6)? I assumed that it might have to do with an electrical connection to an amplifier stage in the mixer portion, so I disassembled the mixer portion of the source and attempted to exercise the various connections in hopes of improving things.? No change in sympoms observed.

7)? It is possible to perform a cal and use the instrument when it's the -30 dB output power mode, but when I do so the response hops around a lot and the response below about 300 MHz is pretty much unusable due to noise and phase errors.

?

I thought that I figured out a way to reproduce the issue.? There is a cable (W26) which connects the source assembly (A3) to the REFERENCE (A12J4).? When I powered the unit up and it had low output power, I disconnected this cable.? The output power stays identical (i.e. 50 dB down in power and shows the -20 dB return loss).? When I reconnected the cable, it turned the source "good".? I then powered down the unit and repeated (and it worked the same way a second time).? However, in subsequent tests I have not been able to get this "fix" to work.? This kind of makes me think that there is something wrong with respect to how the input from this cable is being processed - like a bad cap or something on the PCB below the mixer which is keeping this signal from providing the proper feedback???

?

Attached are some pictures of the various measurements I described above.

1)? Output power of source (1 GHz tone) when it is not working properly.? Output power default (0 dBm target)

2)? Same as above, but output power +15 dBm target

3)? YIG output measured directly.? (default output power target, 1 GHz?)

4)? S11 (no load on port) when machine is working properly.

5)? S11 (no load on port) when machine is not working properly.? Note - the slight change in shape between #4 above and this measurement is likely cause by a different port coupler that I was testing (not related to this issue).? Basically the shape of the curves changes very little but everything drops 20 dB on the display.

6)? Source module showing the cable which I unplug to test.? When this cable is removed, nothing changes (if the machine is in the "bad" state).? When I plugged this back in (previously) it started working (generally).

?

At this point, I'm confused so I'm hoping that one of the smart people here can point me to something that I can measure, test, or try to solve this elusive issue.

?

Re: Troubleshooting a 8591e with opt 130

#148505

So I redid the adjustments.?

Starting with the 2nd Lo output, I measured 1.8GHz at -17.1dB.

?

Next I started the 2nd converter bandpass adjustment.

Now the manual states:

8. With nothing connected to the analyzer INPUT 50 ?? press the following keys.

? ? PRESET

? ? PEAK SEARCH

? ? MKR FCTN, MK TRACK ON OFF (ON)

? ? SPAN, 10, MHz

? ? Wait for AUTO ZOOM message to disappear.

?

At that point my analyzer shows a peak at 480kHz with a level of -9.8dBm.

Then the manual states:

9. Set the analyzer as follows:

MKR FCTN, MK TRACK ON OFF (OFF)

SPAN, 0, Hz

?

At that point i'm left with a flatline at -72dBm.

But if I set the RBW to 3MHz, I have a level of -10dBm again.?

There seems to be a frequency deviation causing the signal to be gone when going to 0hz span.?

I tried to redo the adjustment with the 3MHz RBW but afterwards no signal was visible on the analyzer at all.?

I also tried to tune the bandpass filter for the 15MHz -3dB span of the second converter bandpass. Again no proper signal on the analyzer afterwards.

?

Then I did a Frequency self cal and retried the first steps, Now I did have a proper level shown with the 0hz span.?

I guess the local oscillator is tuned during the frequency selfcal and appareantly the freq selfcall is necessary for this adjustment.

?

To be fair, in the service guide the frequency cal is indeed done before this adjustment. So a nice gotcha for future reference.?Always do freq cal before 2nd converter adjustments.?

?

Now the peak is at 2.12146GHz.

I also double checked the 2nd lo output, it was 1.8000GHz -15.9dBm.

?

I retried to do the adjustment but still no great succes. If I follow the instructions exactly and do several runs to optimize I end up with nothing. The peaked signal with the A5C1 seems to work, also peaking with A5C3 seems ok. Mainly the A5C2 adjustment seems to be an issue, with A5C2 i can completely reduce the signal on the analyzer to the noisefloor, afterwards peaking it with A5C3 is impossible.?

?

For now I'll wait for the new mixer diodes, with those I'll retry.?

?

As answer to your latest reply:

On the self cal amplitude part, I found this video online:

https://www.youtube.com/watch?v=WUv8ZJsesgs

with the amplitude cal starting at 1:50

The 3db BW cal starts around 2:25 and while still somewhat high, the levels aren't off the screen like mine. At least the -3dB point seems to be around the ref level.?

?

For the rs232 please don't put too much effort into it, this capture was done with a regular terminal program which probably ommits control characters indeed.

?

Marco

?

Re: Troubleshooting a 8591e with opt 130

#148504

开云体育

Hi Marco,

Yes, you are right, if the first converter is not linear because it is damaged, it will distort the test of the log detector.

A solution would be to input a signal at 321.4MHz to the A9J4 module, but I do not think it is worth doing the test given the results.

Your filters are correct, just that I notice that the amplitude is about 4 to 5dB higher than on my 8591A for the same test...but on my 8595E, I have the same behavior as your 8591E

The image showing the 5MHz filter having a level of almost 15dB higher than normal during the SELFCAL, I did not observe this behavior on my 8591A, but on my 8595E, which is in excellent condition, we see it very well during this calibration...so this behavior would be normal for the E version.

?

The problem for the HPGL file comes from the data received by the rs-232 link. Your rs-232 utility did not retain the ascii code 03, which is the control signal ending a text label. Without this termination, your file will be unreadable. The LB characters are the beginning of a label, and 03 is the termination, which I added manually to your file, and this for all the LBs encountered.

?

I asked a friend if he had a Spectrum of the 8590 series with rs-232 option, I could then modify my program and send it to you, I will know tomorrow.

?

But today, I will do a test by rs-232 link on another instrument for an HPGL image capture, I will see the behavior.

?

Yves

?

Seeking software - Agilent HP Keysight HP VEE for HP-UX Unix Series 700

#148503

Long shot here but I'm looking for some older software. Would anyone happen to have any of the following? Its an older (pre- 1998) software for a host server running HP Unix / HP-UX version 10.20 that supports GPIB, HPIB, GPIO, & VXI protocols. Later version are on a CD, earlier versions on tape, I can take an ftp or downloadable link also if anyone has it.

E2111D VEE (Visual Engineering Environment) version 3.2
E2111E VEE (Visual Engineering Environment) version 4.0
E2111F VEE (Visual Engineering Environment) version 5.0
E2111G VEE (Visual Engineering Environment) version 6.0

Thanks
Jesse Dougherty
Cypress Technology
Re-sellers of HP 1000, 3000, 9000, & Itanium
jesse@...

Re: Troubleshooting a 8591e with opt 130

#148502

Hey Yves,

?

I checked the Log detector and the BW filters.?

The TinySa can only output up to -18.5dBm so doesn't have the range to go from -70 to 0dBm. I did check it using the tinySA to begin with though:

output TinySA	peak level 8951
-69	-70,7
-59	-59,9
-49	-48,1
-39	-36,5
-29	-24,7
-19	-13,7

So there is some deviation starting around -40dBm.?

I also had an old R&S SWP sweep generator laying around which can do CW. It's one of the repair projects I wanted to use the 8951e for but now we'll go the other way around.?

The output frequency of the SWP is a bit drifty so I couldn't do 0hz span. I did 1MHz span and 30kHz RBW. I also checked the SWP output with the TinySa, with an additional 10dB attenuator. The output of the SWP seems usable.?

R&S SWP Output level	8951 level 1MHz span, 30kHz RBW	TinySA level with 10dB att
-70	-68,4	-79,8
-60	-60,5	-70,8
-50	-48,9	-60,8
-40	-37,9	-50,8
-30	-25,9	-40,8
-20	-14,6	-30,3
-10	-3,6	-20,8
0	7,7	-10,8

?

So the 70dB level difference is a 76.1dB difference on the 8951e. I guess that could partially still be the bad mixer diodes? New ones should be in early next week.

?

For the bw filters I used the SA's own cal signal again. With correct off.

The level is pretty steady for the regular BW's, for the opt 130 BW's there is additional attenuation. I added all the screenshots below. I believe the opt 130 filters aren't adjustable.?

RBW	MRKR LVL
3M	-16,4
1M	-16,4
300k	-16,3
100k	-16,1
30k	-15,8
10k	-15,7
3k	-15,9
1k	-15,9
300	-20
100	-21
30	-31

?

For your later reply:

the image you send looks a lot like it should I think! Is there anything I could change on my side to improve the problems with the termination of the labels or is that just the way the output is done??
Now that I know the output of the SWP could be usable I'll see if I can do an amplitude cal with that.?

I'll try to the the tripler and second converter adjustment again later today with your input, thanks!

?

Marco

Re: Need power on switch part number for HP89410A

#148501

Hello Leo,

?

Did you find a matching color since then? I am myself looking for one.

?

Fabio

Re: Troubleshooting a 8591e with opt 130

#148500

开云体育

Hi Marco,

?

For the HPGL file, I was able to recover the errors, for center frequency and MKR, not sure if it’s ok.

?

In fact, the problem is that the codes related to the termination of the labels, the shape of the zero, the line field are not in the HPGL file, so the file was unreadable.

I simply added these control characters manually.

?

------------------

?

Option 101, it’s a good new: Fast time-domain sweep and Analog + display.

?

-----------------

For the attenuator calibration, it is always possible to do it at a lower level, but it must be exactly 10dB lower.

The reason is that it is the value of the REF LEVEL that determines which attenuators will be activated.

The combinations have been chosen so that only one of the attenuators 1,2,4 or 8 is activated

In table 2.2, subtract all values ??from -10.