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E5052A Power On Test (3.3V Bus Supply) 26
I wonder if anyone here has experience or access to an Agilent E5052A signal source analyser? Mine is about 20 years old and is recently showing signs of unreliability. The main symptom is an occasional power on self test fail and it then reports issues with a 3V3 power supply voltage on the A3 DSP/ADC board where it reads low at typically 2.96V. I think a pass requires >2.96V but this may be firmware dependent. My E5052A is running the latest firmware V2.51. I think this 3V3 supply is common across the backplane but it gets reported as an A3 test in the service menu. The 5V PSU rail also reads low at between 4.7 and 4.8V but this is still a pass (shows true for the test result) Also, for several years now it has shown a stubborn internal spurious at 60 kHz at a very low level. This very slightly spoils any phase noise measurements even though it shows up at about -140dBc then the trace is in phase noise mode in dBc/Hz. I'm not sure what causes this internal 60 kHz term, it may be from a PSU or the display or a divided clock. It may be that the 60kHz spurious term is a feature of this analyser as it is present on all my plots dating back over 13 years. It's not caused by anything nearby to the instrument as it does it regardless of position or proximity to other equipment. Plus the other E5052A I've used in the past (in a different location) is exactly the same. The 60kHz spurious is also present when I swap across to the baseband input even with a very clean LF signal fed to the 0-40 MHz baseband input. So this spurious must be getting in at the ADC if it affects the baseband input as well. I've seen similar on another E5052A that also shows a lowish 3V3 voltage (but it never shows a power on test failure) and it also has the permanent 60 kHz spurious on all phase noise tests on the main RF input. The service menu password is only three characters long and is 'kid' If anyone has access to a healthy E5052A could they enter the service menu and do a manual Power On Test (POT) in the service menus? Then report the 5V and 3.3V results for the A3 module Mine shows anything from 2.91V to 3.05V and I think the pass/fail threshold for the POT is somewhere around 2.96V. The other E5052A I have some access to shows 2.982V to 3.08V and never reports a POT failure. Thanks in advance for any replies Jeremy
Started by jmr @ · Most recent @
Tricks and thoughts about the 3457A battery 18
I did it ! I replaced the memory battery in my 3457A. My used 3457A was built in the late '80s and still had its original lithium battery, with a 1989 date code on it. This battery obviously needed replacement. Unfortunately, the battery is soldered to the processor PC board and provides permanent Vcc for a low-power CMOS SRAM chip which holds the multimeter's calibration constants. In other words, interrupting the SRAM supply would result in the loss of calibration data. Thus, the battery must be replaced while the 3457A is powered up. This is a bit of a nail-biting experience, but it can be done. One useful trick I used is to prepare a cardboard shield which covers the CPU board and protects it from any solder drops and shorts, while allowing access to the battery. And of course the soldering iron must be floating. Replacement batteries in the original size (lithium BR 2/3AA with solder pins) are still available for a few dollars, but I chose to install a slightly different battery, a Tadiran SL750 which has a 1/2 AA size, for which sockets are available. Using a socket means that in 10 years, the next battery replacement will be easier : with the multimeter powered up, just pop out the old battery and insert a new one. Another advantage is that 1/2 AA lithium batteries are very easy to find, there's a good chance that your local supermarket has them. Now I'd like to share some thoughts and questions about this battery. As we all know, lithium batteries have a long, but finite life. Even though the current drain on the battery is less than 0.2 uA at room temperature, at some point in time the battery will die. I read the 3457A user and service manuals, but I couldn't find a single mention of the battery. Nothing about battery life, no instructions on how to replace it, even nothing that says "contact your nearest HP sales office". To me, this doesn't make sense, especially when considering that this multimeter was introduced in 1986, at the time of the "old HP" which produced high-quality instruments, not expendable stuff. I could only think of a few possibilities : - Maybe the engineers at that time believed that lithium batteries could last forever ; - Or they thought the multimeter would be scrapped when the battery runs out, or before it does ; - Or they decided that if a multimeter loses its calibration data because of a dead battery, it should be returned to HP for battery or processor board replacement followed by re-calibration. That's an expensive proposition. None of these options make any sense to me in the context of the "old HP". Further thoughts and comments will be most welcome ! Joel
Started by Joel Setton @ · Most recent @
HP 53310A modulation domain analyzer memory upgrade 4
Hi Folks, On the hunt for a source for the RAM chips to expand the memory in my 53310A The usual Googling around has yet to yield 4 pieces from a single source. Do any of you have 4 that you would be willing to part with..? Candidates are: Cypress CY7C194-25PC, Hitachi HM6708P-25, Motorola MCM6208P25, or equivalent. Located Louisville, KY 40206 USA
Started by Dave Wright @ · Most recent @
HP3325A Trouble, Calibration FAIL 2 & 3 4
Hi, I need some help for my HP 3325A, which worked many years perfect, but know has the common FAIL 2 & 3 Error. (PASS 1, FAIL 2 FAIL 3) It has still sin, square and triangle output, the amplitude is ok, the range is ok (1-10Vpp) into a 50 Ohm load. When swtichting from sin to square or triangle the a-cal error message comes up. The voltages are good, 5.05, -15.16, +15.16 volts, no ripple, or minor. I changes some caps in the psu some time ago. The integrator output looks good, the voltages are as expected on the testpoints LVL,OS1,OS2,AMPL,XDR. I interchanged already U20 & U24. I have a revision C board, the realays on the att board are the flat black ones. Alls tests were done grounding the ACD pin, 1khz and 10Vpp. I found something strange in the amp section. placing the jumper to detach the amp from AMP IN and measuring the DC bias voltage at F3 left and right it shows -12.73 volts. Should be +7.5 volts. When toggeling the jumper and playing with the amp settings, the voltage sudden comes to a normal value and I could adjust the bias with the pot to 7.5 volts. Should it be in any case 7.5 volts after power on and when AMP in pin is disconnected and with any amp setting? I checked already soldering and diodes, resistors, fuses and caps for shorts. And some transitors in the amp section. I have the service manual, there is a huge section testing with a signature analyzer, but I don't have one. So are there any hints, what to test / check next? Am I right in the amp section? Ralf
Started by Ralf Rosche @ · Most recent @
HP6209B component location layout 12
I recently acquired a HP6209B, and already have the same manual as the one here in the files section, but it does not include the component layout, as it seems that page was left out during the scan. If someone might have a HP6209B paper manual, could they please take a clear hi-res picture of the parts location page and email or post it to the files section? I think the 6207B is almost identical so a picture of that component layout might also be helpful, if it has better resolution as the one present on the 07B 1970 manual I already have that looks very dark, lo-res and low-contrast, so not very usable at all. The power supply seems to work just fine, other than on the 12mA scale the meter needle pegs all the way to the left beyond zero, even without a load connected. Guessing probably some resistor value has drifted, so a parts layout might be helpful to have. The 120mA scale seems to work fine after calibrating it (it was reading a bit low). And if I put a 10mA load while on the 120mA scale, and then switch to the 12mA scale it will read around 8mA, even after the calibration. About a second after disconnecting the load the needle will start to move left. Volt scales where reading 5V high, but after a meter zero and calibration they are now reading reasonably ok for an analog meter. One other issue is that the current 10T pot seems a bit stiffer to turn than expected, but is still fully functional. On the other hand the volts 10T 100K pot was replaced with a 50K unit, and the tech even left a note about this inside the power supply taped on top of the main transformer, dated November 1981. The volts adjustment turns with normal feel, and also seems to work fine with this half value pot. Thanks in advance.
Started by Alex @ · Most recent @
HP 85047A test set on 8753A analyzer -- switch control board jumpers to retrofit for opt 009 (mechanical switch) 2
Working on a 85047A test set which needs to be retrofitted with mechanical switch 33311B, as it has dead solid state switch and will be used with 8573A analyzer (pre-dates the 85047A). Goal is to end up with an 85047A opt 009. This issue has to do with interaction of the switch control board (back panel) and the analzyer's port A(1) and B(2) switching controls. The 8753A analyzer is working normally with an 85046A opt 009 (mechanical switch) which was retrofitted from solid state at some point in the past. The 8753A is on firmware 1.01. The analyzer has never been tried with an 85047A since I've had it. The switch control board (along back panel) has three jumpers defined - J3, W1 and W2. J3 is not discussed in the manual but is installed from factory. I've installed 0.025" square (typical wire-wrap style) pins on the back side of the board for J3, W1 and W2 so that they can be reconfigured without pulling the board from the chassis. As built (with solid state switch) J3 - present (not mentioned in manual) W1 - absent W2 - absent Behavior - port B selected <1 second during power-up, never again. As documented (with mechanical switch) J3 - present (not mentioned in manual) W1 - absent W2 - present Behavior - port B selected <1 second during power-up, never again. Other experiments J3 - present (not mentioned in manual) W1 - present W2 - absent Behavior - port B selected ~3 seconds during power-up, never again. J3 - present (not mentioned in manual) W1 - present W2 - present Behavior - port B selected ~3 seconds during power-up, never again. So, at this point I cannot get the analyzer to switch to port B (right hand port) when initiating a 1-port S22 calibration. Any suggestions at this point?
Started by David Feldman @ · Most recent @
odd HP83651A error 5
Hi folks, my 8510C system recently developped an unlock error, so I have checked the source HP83651A first. It turns out, that the source output below 2,4GHz is exactly (to the Hz) 100MHz too low, while above 2,4GHz it is spot on. Also, the 8510C works fine above 2,4GHz. Has ever anybody seen such a strange problem? Any ideas what could cause this? Tom
Started by tom_iphi @ · Most recent @
Error 7301 on HP70820a
Dear friends, I ask you if possible to help me solve my problem: I have SA HP70000 and a HP70820a that worked perfectly. At a certain point without having used it improperly an error occurred (7301 ch 1 up bus, wr addr: bit). I ask you if anyone has info or has had the same problem. I ask for your help in trying to solve it. Thanks Gianni
Started by Xsherman @
PN 1855-0064 6
Looking for any info on this device. Dual JFET, N-channel, TO-71 package. I have a 7652A and both were pulled from one of the boards. I may pull one off another unit to curve trace but thought I ask if there's any spares out there first.
Started by John Warren @ · Most recent @
making 8620C sweeper scales
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
Started by Adam R. Maxwell @
Repair HP3455A Multimeter 8
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
Started by Ralf Rosche @ · Most recent @
File Notifications #file-notice
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.
Started by Group Notification @
PCB CAD used and/or sold by HP ? 8
Some time ago I had a discussion with a friend over old times circuit board design. He referred to where he worked where they used to do manual design using black tape and transparent films. "The layouts were beautiful but difficult or even impossible to modify". Then "We got a CAD-system from HP" and it all changed. I am unfamiliar with CAD-systems created by and/or sold by HP and what happened to that product. Anyone that can shed some light? Cheers Ulf Kylenfall SM6GXV
Started by Ulf Kylenfall @ · Most recent @
3585B Spectrum Analyzer 11
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
Started by ve3poa@... @ · Most recent @
Feet for ESG style instruments. 3D model.
I have modelled a simple foot that I use for the ESG series generators. It is just tall enough for the instrument chin to hover over the desk surface. Leo Here goes nothing:
Started by Leo Bodnar @
Looking for documentation on 4263A LCR meter 2
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
Started by Jared Cabot @ · Most recent @
Agilent E5071C Low power both ports, Vernier Leveler E5071-62083, Component IGC1-4213 replacement 4
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.
Started by Scott Vance @ · Most recent @
Who has the fieldfox N9912A or N9923A inside SD card image?
Hello! My internal sd card has died and filedfox cannot boot. That's why I can't install updates firmware from Keysight.com
Started by wer cf @
HP 432 Replacement 2
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
Started by Paul Bicknell @ · Most recent @
E5071C powering down 4
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
Started by Sven Schnelle @ · Most recent @
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