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Hi all, Delurking to note that I took the liberty of uploading some additional files for DIY 8620C sweeper scales to this folder, which is hopefully okay: /g/HP-Agilent-Keysight-equipment/files/All%20HP,%20Agilent%20and%20Keysight%20instruments%20in%20folders%20by%20part%20numbers/8000%20to%208999/8620/8620%20%20%20DIY%20Scales I recently acquired 86240B and 86290B-H08 sweeper plugins, both missing scales. This was annoying enough that I designed a replacement blank scale in OpenSCAD for 3D printing. The STL file prints fine for me with PETG, though I had some warping problems that I think I fixed by adding internal braces. It may also require a lower bed temperature, but if the scale bows, it'll be super obvious. I used LibreCAD to divide the lines, and added the text in OmniGraffle. I've printed a batch of these on Avery UltraDuty HGS Chemical Labels for laser printers, then cut them out using a steel straightedge and utility knife. Printing on plain paper and sticking them on with 3M 77 spray adhesive works just fine, and doesn't require sanding the scale beforehand. YMMV. I've not found photos of the actual 86290B-H08 scales anywhere, so may not have the same major/minor ticks as the originals. Corrections welcome, but hopefully this is useful to someone. Adam KK7ASV

Hi, my 3325A is driving me crazy and no one could help yet, so I went over to a faulty HP3455A multimeter. It worked many years, but now it comes up with a OL display in DC. Cal test stops at 11,10,9,8,5,4,3,2,1,0 and a digital value 0.062. All voltages are stable with nearly zero ripple. Vref is 10V, all perfect. The good service manual (no extrem testing procedure with a signature analyzer as in the 3325A manual) has many tables with listings of voltages for the individual cal number. The cal feature switches many fets to ground, vref etc. I found suspect voltages at the outputs of U6 a LM339 and replaced it, this fixed some cal errors. The meter now has only cal error #10. Checking the flowchart for #10 and the voltage matrix a found a suspect output on Pin 14 of U5, so I replaced it with no success. The voltage is 8.8V, that seems to be the Gate Bias voltage after 100KOhms, i lifted the pin and supplied shortly -24v, but this was not suceccessful either. To pin 14 there is Q21 connected, i suppose it does not switch off, Pin 14 should be -24V. Next I will replace Q19, the part number is 5070-7074, but I can't find any information and it is not listed in the HP crossreference list. I has 4 pins, may be one pin is can and gate is tied to taht pin as i can measure the gate bias voltage at the can. Has anyone a spare part or a hint which fet i can use to replace the Q19? Ralf

The following items have been added to the Files area of the [email protected] group. /All HP, Agilent and Keysight instruments in folders by part numbers/8000 to 8999/8620/8620 DIY Scales/HP 86240B and 86290B H08 scales.pdf By: Adam R. Maxwell <amaxwell@...> Description: Additional 8620C scales drawn using LibreCAD for 86240B and 86290B option H08. Sized for US Letter paper. The following items have been added to the Files area of the [email protected] group. /All HP, Agilent and Keysight instruments in folders by part numbers/8000 to 8999/8620/8620 DIY Scales/HP 8620 sweeper scale.stl By: Adam R. Maxwell <amaxwell@...> Description: STL file for printing custom 8620C scales. Printed using Ender 3 with PETG, and PLA should work as well. Surface may require sanding before sticking/gluing a scale face on.

I was fortunate enough to receive the 3585b SA recently. When I first picked it up it powered up fine and display appeared to be normal. Getting it home and after setting it up, it again worked fine. I ran some tests and looked at signals on the screen and was happy with what I was seeing. However powering it up a couple of days later, there is no display other than a dot in the centre that flashes. While booting up, 1st heard is one beep followed shortly by 2 and then a long pause before several beeps are heard, about 28. They start off quickly and then slow down near the end. I've re-seated some boards and several connections with no change in results. Any help in pointing me in next steps would be most appreciated. thanks, Peter ve3poa

Hi all, I'm currently on the search for the Operation Manual (p/n: 04263-90000) and the Service Manual (p/n: 04263-90031) to suit the 4263A LCR Meter. I have the 4263A Users Guide (p/n: 04263-90001) from the files section here, and all the 4263B manuals, but the two for the 4263A mentioned above seem a bit elusive. Does anyone have a copy of these two that they could send through or upload to the files section? Thanks! Jared

In the process of fixing 9 pcs E5071C, I have noted that at least three of them have low output power on both channels (-26 dBm on two, -31 dBm on the third). I confirmed that the faulty component was the Vernier Leveler and then took this apart to take a look. It seems like it's always the expensive components that burn out, so I decided to remove IGC1-4213 and bridge the contacts on either side of the component. Sure enough, the output power went up from -26 dBm to about -9 dBm. Some limited information about this part is available on the Keysight. Looks like it's a 11 dB gain power amplifier, so the numbers check out and it looks like this is the failed component. Assuming that they drive it at 9 dBm gain, that would give me the right power at my port (0 dBm nominally). https://www.keysight.com/us/en/product/1GC1-8213-BLK/dc10ghz-power-amplifier.html Replacements components appear to be hard to find and expensive (around $500), which is a pretty good indication that failures on this component are common place. The Keysight page indicates that they sell parts (1GC1-8213) in lots of 10 pcs, so I've put in an inquiry. My questions: 1) Is it possible to get a IGC1-4213 data sheet? 2) There are some similar component numbers (IGC1-4214, IGC1-8213). How does one tell which components are compatible and which are not? Data sheets seem to be unavailable and every time I ask Keysight a question they respond that they're happy to fix it for me, just send them a check for 6K USD. 3) Of the 9 units, there are two components that have failed and knocked out about 6 of the units. In other words, two failure mechanisms keep repeating themselves. Keysight has got to know this. Why don't they have a service bulletin or something? Why don't they offer a reasonable repair service for these components which appear to have been designed to fail? Just a rant I suppose, but I'm not too impressed. On the plus side, it makes my job easier because once I figure out the failure I just have to apply the same solution over and over again.

Hello! My internal sd card has died and filedfox cannot boot. That's why I can't install updates firmware from Keysight.com

Hi All Has anyone used the TEGEM 1830A RF Power Meter a HP 432 Replacement or the new Keysight Replacement for the HP 432 as i have just bought a HP 478A Option H72 and would like to get an accuracy of better than 0.5 % accuracy out of it I have put all i have about the TEGEM 1830A RF Power Meter in the Files A temporary directory for photographs and help relating to emails and posting Regards Paul

Hi, bought a E5071C 4-port 8.5GHz VNA. Seller stated that the device does not power up. Arriving home I connected it to power switched it on - it turns on, Fans blowing for 3-4 seconds, no other signs of life, everything switching off. Noticed that if i remove the CMOS battery from the Mainboard (a Radisys Endura LS855 with Agilent patched BIOS), the Analyzer is starting up. It boots Windows XP just fine and the VNA is working. (Luckily the RF ports all seem to work). When shutting down it won't shut down entirely, black screen, and the Fans are still blowing. With the next power cycle i have the problem stated above again, until i remove the CMOS battery again. That even happens without booting Windows XP. So it seems like the BIOS is loading some invalid values into the CMOS RAM. The service guide from Keysight says it should be sent in to replace the CMOS battery, but that's very expensive for a hobbyist. Does anyone know how to get the proper CMOS data restored? I see there's a bioscheck.exe binary in the E5071C folder, but executing that doesn't change anything. Thanks Sven

Anyone know where to find better than this scan from the Keysight site? It's not quite legible... https://www.ecosensory.com/tek/HP-6268B-op-svc-9018-05504-schem.png

Since Agilent continiously ups the spare part prices and discontinues parts it has become more and more important to go past normal repair practices. Step Attenuators for example can be repaired without any special tools or cleanroom enviroment ! Lets take a look at the failure modes first, there are a few: 1.) Blown pads Usually common with spectrum analyzers if a level past the damage level of the attenuator was applied 2.) Cracked pads, pad has developed a hairline crack due to mechanical stress ! 3.) Improper contact, the contact in between the attenuator and contact fingers is disturbed. 4.) Stuck solenoid Quite common if attenuator hasnt been used in awhile After we remove the attenuator from the instrument the first step is to obtain the pinout and build us a little test bench consisting of a powermeter and a signal generator, the good old 8481D or 8484A will do nicely, if you dont have a sig gen use the 50MHz calibrator output of the 435 or 436 or similar model, connect the cal output to the 30dB pad connect the sensor and zero and calibrate meter, the meter will read -30dBm. Disconnect the sensor from the attenuator and insert the Step Attenuator, set step attenuator to 0dB, note the level on the powermeter, now switch in the attenuator sections one by one measure and note the level, 70dB attenuators are comprised of a 10 20 and 40dB Pad while 110dB Attenuators normally comprise of a 10 20 and two 40dB pads ! check every section individually, you should hear a click as you enable each section, if you find a bad section note the value it should have if all sections appear to be good repeat the test at a higher frequency using a sig gen, if everything appears to be ok at low frequency then most likely you have attenuator that just needs cleaning. Now lets take the attenuator apart, looking at the top you will see a nut on each SMA connector, remove this nut this will allow for you to remove the nameplate, under the plate you will see a wealth of allen screws, remove those but note that the screws close to the SMA connector are shorter than the other ones. Now look at the small sideplate, not the one with the ribbon cable but the other side - there are 4 small allen screws, remove those and then remove the sideplate, careful not to lose the little wire mesh here ! now slide out the u shaped cover and remove the top side. You now have two parts, one beein the bottom side containing the solenoids and the other one beein the top part containing the attenuator pads. First lets inspect the pads, you can measure them with a ohm meter, they should measure in the vicinity of 50ohms , except of the 10dB pad which can measure up to 70ohms or more. Inspect the pads visually, are there any burned or cracked pads ? if all pads look ok and check out at DC take a surgical swab and isopropilic alcohol and carefully clean the contacts pads on the attenuators. Next look at the contacts, enable all solenoids and observe the position of the contact tongues, they should be slightly above the surface of the block, carefully clean the contact tongues with alcohol, be careful not to bend them. next put the solenoids back into the 0 position and look at the top of the solenoids, you will see two little white plastic rods where those meet the solenoid you should see little rubber rings , there are 4 of those on each segment, usually over the years they go briddle and then disappear, with those rings gone the attenuator wont make contact anymore, you can buy the rings from watchmakers supply stores as they are beein used for sprocket gaskets ! Now if your gaskets are there put the attenuator back together after you cleaned everything and it should work now. If you have a broken or burned pad dont stress over it the pads are used in all HP attenuators so just find a attenuator on ebay and take the pad you need out of it, you can also buy pads from agilent however be prepared to pay $100-150 per piece

I got a HP8754A recently that mostly works but seems low on available trace intensity. Maybe it just needs some internal adjustment, or maybe the CRT is weak on emission. Now that I have this one, I've cancelled a project I was planning to fix an old HP8407 VNA with 8412A CRT mag/phase display. I junked it all out and it turned out to be the right choice, since I found all sorts of corrosion in places inside, and broken items, which would have been a PITA to restore anyway. I would have also needed to acquire or build a suitable source for it. The 8754A has everything in one unit sufficient for mag/phase transmission measurements on RF parts. It will be committed to the component testing dept. I saved the CRT from the 8412A. It seemed to be pretty decent in brightness, so maybe it could be a spare for the 8754A if ever needed, with certain limitations. The screens appear to be basically the same except for marking details, and the 8412A one does not have the circular or radial graticule lines for polar display. In the manuals I found the CRT pinouts appear to be the same, but the listed cathode supplies differ by 100V - could just be typos, or different design choices, or maybe due to different phosphors (P39 v. P7?). I believe they are both the same basic CRT, just with different faces, so should be interchangeable. I found some CRT info here in the files department. It says the 8412A used 5083-9081/P7, and the 8754A used 5083-1890/P31. The manual for the 8754A says its standard CRT is P39, while the 8407A doesn't say anything about the phosphor. I know they're both green, and would have gone with long persistence for this application. Anyway, I can accept the differences if something should happen to the original CRT, and the spare is close enough. Does anyone know details of the HP CRT lines, or where more info can be found to clearly determine (electrical) interchangeability? Ed

Would anyone have an example cal file they can share? I’d like to create one for my hardware

Hey All, I noticed what looked to be a zero issue with my 435B, so I thought I'd run it through the zero carryover test (OSM 4-6) to see what was going on. While the meter meets all the ranges given for zero carryover, it occasionally doesn't meet the requirement: 4. Press the front panel ZERO and wait for the meter indicator's position to stabilize. Verify that the DVM reads 0+/- 0.9 mVdc. Release the ZERO switch. My output seemed quite noisy, so I used the statistic function to look at it over 100 samples, and what I saw was: Max 0.533 mVdc Min -1.006 mVdc Avg -0.150 mVdc If I had been quick to look at it, then I could have moved on to the next part of the test and never noticed that over some time it exceeds the +/- 0.9 mVdc requirement. Should this be less noisy? The only fix from the manual is to change the factory selected resistors A4R12 & A4R16 (the A1 assembly is a recommended factory replacement), and it does pass the actual +/- span for each step of the range control so I'm hesitant to make any changes to those. Any thoughts or guidance appreciated. TonyG