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Bricked E1439C after firmware update on 89600
Following a firmware update which showed no errors, my E1439C no longer shows up in the VXI resource manager. Does anyone happen to have an image of the 28F800 flash chip, insight on how to extract
By Ed Marciniak · #150633 ·
Re: HP Agilent 8753ES VNA repair [Help]
Hello Yves, Thank you for all the pictures and all the measurements. I understand the board better with your annotations. The frequency synthesizers and PLL is not the easiest part to understand. I
By MattSNE · #150632 ·
File /All HP, Agilent and Keysight instruments in folders by part numbers/3000 to 3999/3708 Noise and Interference Test Set/HP 3708A Service_Manual.pdf uploaded #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/3000 to 3999/3708
By Group Notification <noreply@...> · #150630 ·
Re: 3708A Noise and Interference Test Set - Looking for a Service Manual
Hi Jared, Just uploaded service manual for 3708A to the 3000 group. Regards Gerald VK3GM
By Gerald · #150629 ·
Re: HP Agilent 8753ES VNA repair [Help]
I took some measurements of the PLL VCO, you can compare. On the oscilloscope, I put a slight offset for CH1, to be able to better distinguish the two input signals to the phase detector.
By Yves Tardif · #150628 ·
Re: HP Agilent 8753ES VNA repair [Help]
Hi, Here is the part of the circuit inside the shield. It is very similar to the schematic and PCB of an 8753D, but the mixers are different. Yves
By Yves Tardif · #150627 ·
Re: HP 54512B (pair) repair
I guess I'm looking for a Delta Electronics 03EB3S-1 (9135-0452) switched EMI filter (see pic enclosed). It came apart as soon as I tried to see what's wrong with it. Thank you in advance for digging
By Radu Bogdan Dicher · #150626 ·
Re: HP 54512B (pair) repair
Two steps forward, one step back (one and a half?). While other things have been progressing, the power switch stopped working once I put most of the unit back together. I enclose some pictures,
By Radu Bogdan Dicher · #150625 ·
Re: HP 3403C True RMS Voltmeter display fault
The other one ooks just as weird but is healthy according to the chinese component tester. Are there guidelines on HP capacitor replacements? Such as caps that never/very rarely fail and those who
By AArnaud · #150624 ·
Re: HP 3403C True RMS Voltmeter display fault
Wow. I have *never* known one of those capacitors to fail. I replace dipped tantalum capacitors all the time, but never one of those! -Dave -- Dave McGuire, AK4HZ New Kensington, PA
By Dave McGuire · #150623 ·
Re: HP 54512B (pair) repair
Razvan, Thank you very much, this is very helpful. I've managed to rig a load - I had a couple of 1ohm/10W Vishay RS10s (bulletproof, in my experience), and it looks like the -12V rail is MIA because
By Radu Bogdan Dicher · #150622 ·
Re: HP 3403C True RMS Voltmeter display fault
Hey Guys, It is indeed a Tantalum capacitor, from the Kemet T110 series. ( https://www.mouser.fr/datasheet/2/447/KEM_T2031_T110_AXIAL_T212-3316949.pdf ) From my research that would be T110B226K015AS.
By AArnaud · #150621 ·
HP8510C CalKit file .CK_ format
Hi there, I'm trying to generate the calkit file CK_ programmatically instead of punching them in various GUI based CalKit manager. Basically, I'm doing my homemade open and slot standards and
By Calvin Guan · #150620 ·
Re: HP 54512B (pair) repair
Hi Radu, I think the PSU in all 545xx series was made by Boschert Inc. and someone already reverse engineered it. I attached the file. I hope it helps. Regards, Razvan
By Razvan Popescu · #150619 ·
Re: HP 54512B (pair) repair
Going back to my -12V rail issue, the SM advises loading the 5.20V rail with a 2ohm/25W resistor. The only way I can put something similar together with what I have at hand is using these dummy loads
By Radu Bogdan Dicher · #150618 ·
Re: HP 54512B (pair) repair
One of the two scopes is completely disassembled - head exploding emoji - and I have the old battery desoldered after confirming it's fully depleted. I enclose pics with what I'm using for
By Radu Bogdan Dicher · #150617 ·
Re: E5052A Power On Test (3.3V Bus Supply)
Watching this subject with interest.? Leo, you may want to check out OEWaves, Synergy Microwave, and Holzworth Instrumentation (now part of Maury Microwave) for ultralow PN sources and Rohde &
By Jim Ford · #150616 ·
Re: HP 54512B
I don't believe at this point HP was providing component-level Service Manuals anymore. I'd love to see one and prove myself wrong, though. Radu.
By Radu Bogdan Dicher · #150615 ·
Re: HP 8660B/86602B developed output stability problem, getting-started suggestion(s) request
Gary, WB2UAQ --- the advice to make adjustments while the board(s) are enclosed is right on (seeing the solenoid coil on the VCO board helped me see why toroid inductor self shielding property is
By David Feldman · #150614 ·
Re: 3708A Noise and Interference Test Set - Looking for a Service Manual
Someone must have scanned it, as there is a 3708A on feeBay listed with a CD of software & documentation, probably doesn't help much as you don't want another unit to go with
By factory · #150613 ·