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Date
Re: HP 53310A just failed - very strange
Hello Folks, and the saga is getting weirder. Called my wife, we started to go through the service manual tour a tour. Removed the cable interconnecting the display and the CPU board, and reinstalled
By Tam Hanna · #95865 ·
Re: Type of coax for Impedance Analyzer Test Fixtures
Hi the only thought I have is as follows Coax cables used for charge amps as in Pc / volt often have carbon type of material over the dielectric then the screen to reduce any mechanical noise Just a
By Paul Bicknell · #95864 ·
Re: HP8560E Low Level
There is no high band on the 8560E.? It covers 0-2.9Ghz only, in one band. --John Gord
By John Gord · #95863 ·
Type of coax for Impedance Analyzer Test Fixtures
Does anyone have any idea what kind of coax is used for the 16048A, example below, or other test fixtures. HP say not to substitute. They are in various colours. Are they 50 ohm or just shielded wire?
By peter bunge · #95862 ·
HP 53310A just failed - very strange
Hello Folks, now that the move is complete for like a month, it looks like it did - after all - claim a victim. Today, I tried to power on my 53310A MDO, and saw a totally confused screen display (as
By Tam Hanna · #95861 ·
Re: E4401B No 50MHZ Cal signal
Hi Alex, Based on my experience with the 4401B, there could be a number of causes: * Blown front end * Faulty 50 MHz internal test signal * Bad mixers or * IF issues You really can¡¯t tell from just
By Michael Williams · #95860 ·
Re: My $25 "In Poor Shape" 3468A has arrived
Meant to say on DCV the readings with the jumper fitted are between 0.000000 and 0.000001
By Alex · #95859 ·
Re: E4401B No 50MHZ Cal signal
Hello Alex, Everything is automated during alignment so no settings will affect this. Sounds like the unit has an issue and yes similar to discussions here. It's easy to check - with a cable from 50
By Mark Bielman · #95858 ·
Re: My $25 "In Poor Shape" 3468A has arrived
So my new nice zero ohm jumpers arrived, and here are the results. Just plugged in the jumper into the input terminals and on power up the DCV indicates between 0.000001 and 0.000001. When I go to 2W
By Alex · #95857 ·
Re: E4401B No 50MHZ Cal signal
Sorry to barge in with this, but I have my sights on a 4411B (I assume it is similar to the 4401B being discussed here) that has a message on the startup screen that says "Align RF Skipped, No align
By Alex · #95856 ·
Re: HP 8644B Option 2 Upgrade
Well, thought Colby had the answer but when I looked and the I/O board does not have U32, I had to look at the service manual again. This is only for 8664/65 models. So stuck again. Mark
By Mark Bielman · #95855 ·
Re: HP8560E Low Level
Ok, but if the generator goes to 3GHz, you might just be within the high band. My 8562A has high band from 2.75GHz (low band is up to 2.9GHz). It has coax relay between high and low, so it doesn't
By Askild · #95854 ·
Re: HP8560E Low Level
Askild Unfortunately the signal generator I have goes to 3GHz and also the Spectrum Analyser also only goes to 3GHz (found an Anritsu Spectrum Master I forgot was a SA as well). I did inject 310.7MHz
By Dave Ireland · #95853 ·
Re: hp8640B_with_rough_sound
Yes, the problem is solved. The Problem was a short circuit inside the main oscillator to the Varactor lines. Initially I checked all supplies >> No Problem. Then the voltage that goes to the
By Armin Roesch · #95852 ·
Re: HP 8644B Option 2 Upgrade
I know that unit shares a lot with 8664/8665 units, and if the attenuator is the same, your attenuator cal ROM only has cal data up to ~1GHz. If memory serves me right, it's U32 on the backplane/IO
By Colby Burkett · #95851 ·
Re: 141T varying CRT intensity?
Can you set it up to measure the bias voltage (cathode to control grid) WHILE OPERATING - be good to find out what is changing.
By Bruce · #95850 ·
HP 8644B Option 2 Upgrade
Hello group. I have an 8644B (standard, upto 1030 MHz) that I wanted to upgrade to 2060 MHz. Managed to locate an upgrade kit w/cables (thanks Steve!) but after installing it I get the following
By Mark Bielman · #95849 ·
Re: HP 85044A T/R test set part - Cabinet Trim "zipper" - 08502-20007 - source or 3D printed copy?
Dave, Is it possible for you to share a photo of the case where the zipper locks fit? The service manual on the Keysight site is scanned from a poor microfiche. ¡ªGlen
By Glen Hoag · #95848 ·
Re: 141T varying CRT intensity?
...And it occurs to me that the Brightness pot would be the first thing to look at, since it has 'moving parts', a wiper, etc. If the pot is proven to be OK, then use it as a starting point, and
By saipan59 (Pete) · #95847 ·
Re: 141T varying CRT intensity?
I suggest a cold/cracked solder joint could be the issue - influenced by flexing/shifting when heat builds up. If it "jumps around" between good and bad, that might rule out a component that has
By saipan59 (Pete) · #95846 ·