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Date
Re: 16900A cleanup and modernization experience including installation notes!
Glen, Yeah, I was sent 16900-14121.ISO, and 16900-14122.ISO (for the BIOS upgrade). That's all I really needed for the 16900A.
By Keith Monahan · #95392 ·
Re: 16900A cleanup and modernization experience including installation notes!
Glen, Thanks again for your comments. Responses-inline. Yeah that's what you had said on the previous thread, which is why I opted for a Sil3114A. Surely the drivers are the same or close for the 3112
By Keith Monahan · #95391 ·
Re: 16900A cleanup and modernization experience including installation notes!
Debugging I2C communications between microprocessors: 8 channels for data, roughly 8 channels for status (start/stop/first byte, ack/nak, etc per byte) 8 channels (roughly) for message byte count,
By Harvey White · #95390 ·
Re: 8753ES YIG oscillator circuit WCA
That's great ... for you. Not so great for me. Now I have no reason not to work on my taxes. V.
By pianovt · #95389 ·
Re: 8753ES YIG oscillator circuit WCA
Test 48 now passes.? The analyzer seems to be operating correctly! Wow. I'm going to need to do a writeup on what I found; what was significant and what wasn't, so this can be useful for others in
By Peter Gottlieb · #95388 ·
Re: 8753ES YIG oscillator circuit WCA
I looked and looked and turned up a K&L 2 GHz LPF. The procedure is not the clearest but I identified what seemed like the right spur, the screen looked somewhat like the one shown, and with that one
By Peter Gottlieb · #95387 ·
Re: 8753ES YIG oscillator circuit WCA
The manual says this: If you have a 1 GHz low pass, try it. I think I once did it with a 1.8 GHz low pass. Note, there is a filter-less Test 54 procedure in the manual too, but it looks a lot less
By pianovt · #95386 ·
Re: 8753ES YIG oscillator circuit WCA
Ok, I will do this test. Where can I find the actual specs for this filter?? Online I see reference to it being a 1.9 GHz LPF, in the manual it shows in in a diagram as a 4.1 GHz LPF, and the other
By Peter Gottlieb · #95385 ·
Re: 8753ES YIG oscillator circuit WCA
You do need to check that before you do more esoteric troubleshooting. If the 3.8 GHz oscillator is off, then for a given YTO frequency the IF will be off too. Too much IF error, and the YTO loop will
By pianovt · #95384 ·
Re: 8753ES YIG oscillator circuit WCA
I used a Mini Circuits SLP-1200 filter. It worked fine - the spurs were easily visible. I paid about $25 for it on ebay, but even new from Mini Circuits, they are less than $40.
By Orin Eman · #95383 ·
Re: HP5335A fan replacement
Dear All, I agree with Dave; flow at the required back pressure is what counts. If the fan design is not suitable, the hurricane of free air flow drops to a whisper when the fan is installed.
By alwyn.seeds1 · #95382 ·
Re: 16900A cleanup and modernization experience including installation notes!
Keith, I wasn't able to send this off list, but I'm curious about one (at least initially) thing: * I replaced the spinning HDD with a modern SSD. I'm sure the I'm guessing the original drive was
By G Hopper, KB7WSD · #95381 ·
Re: 8753ES YTO freq vs. Main Coil mA
I checked the FM coil drive and it is right about at zero so that seems like it's not the issue. Nobody seems to know how the firmware works so we are left to guess and try things.? There is some
By Peter Gottlieb · #95380 ·
Re: 16900A cleanup and modernization experience including installation notes!
<keith@...> wrote: I finally found my recovery DVDs. The DVDs that I received as physical copies from Agilent in the "Part Number: 16900-68722 16900A/16902A Recovery DVD Kit"
By Glen Slick · #95379 ·
Re: HP8563 HV supply repair
Hello, OK, so all caps and diodes turn out to be functional - this means the transformer is arcing :-/ The board was rebuilt nevertheless to do some experimentation. I set up a driver similar to the
By Staffan · #95378 ·
Re: 8753ES YIG oscillator circuit WCA
I don't have the required low pass filter so can't do that step. What will happen if that's messed up?
By Peter Gottlieb · #95377 ·
Re: 16900A cleanup and modernization experience including installation notes!
<keith@...> wrote: I don't remember having any problems when I tried using a Buslink SPCI2P PCI-SATA card, which uses the Sil3112A. It might be that the drivers are only
By Glen Slick · #95376 ·
Re: 8753ES YTO freq vs. Main Coil mA
I don't know if this will help, but here goes. First, don't worry about the apparent offset in coil tuning current. YTOs are only specified to operate over a certain range, like an octave or two, but
By Ed Breya · #95375 ·
Re: 8753ES YIG oscillator circuit WCA
Did you do the cavity oscillator correction, test 54, using the low pass filter? I know we talked about it, but I want to make sure this setting is correct. This is normally a firmware correction, you
By pianovt · #95374 ·
16900A cleanup and modernization experience including installation notes!
I purchased a fully loaded 16900A for quite a bargain recently. It has (1) 16950B, 16M, 667MHZ state mode, and 4ghz timing zoom module. It also has (5) 16910A's, 16M option, 500MHZ state mode option.
By Keith Monahan · #95373 ·