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Re: HP 3456A Problem Solved
Which versions of the 3456A does this apply to?? Or all three(?) -Dave
By Dave Seiter · #103714 ·
Re: HP System One feet
I have noticed the same issue. Five years ago those things seemed really common, now it took looking on eBay for a couple of months just to find a single set of four. That said, I am sure they are
By medasaro · #103713 ·
Re: HP 3456A Problem Solved
Larry, I had a similar symptom with my 3456A.? It was intermittent when I got it, but since it worked a good part of the time I decided to keep it and live with it. After a while the intermittent
By Bob Albert <bob91343@...> · #103712 ·
HP 3456A Problem Solved
A few weeks ago, I reported a problem with my 3456A where it would fail at startup with "--------" on the readout and fail Test 3. I reseated one of the microprocessors and the problem seemed to go
By n4buq · #103711 ·
Re: HP 8591 external reference connector (1250-1499)
Daun is right a bnc to bnc will work fine. Do it all the time. Any reasonable cable length will work. Have fun Regards Paul WB8TSL
By paulswed · #103710 ·
Re: HP 8591 external reference connector (1250-1499)
All - Thanks. I am glad to hear that a regular piece of short quality BNC (HP 10502A or similar I presume) will work fine. I figured that the special form factor is just for mechanical convenience,
By medasaro · #103709 ·
Re: Testing dummy loads with a VNA
Leave it to the ME to mess up the Ohm¡¯s law :) I meant of course F=ma vs I=V/R, and mass is then the equivalent of conductance, not resistance. D¡¯oh. - Kuba
By Kuba Sunderland-Ober · #103708 ·
Re: Testing dummy loads with a VNA
I can chime in as a ME wearing an EE hat :) I see S11 measurement as essentially a shaker table measurement where you are not allowed to touch anything but the interface plane. Imagine a shaker and a
By Kuba Sunderland-Ober · #103707 ·
Re: HP 8591 external reference connector (1250-1499)
Matthew: Re: Connector for Ref Osc Intetconnect It is not special other than being a low profile shape. A BNC - BNC cable will work fine. If you want a work around - two BNC Male-Female elbows + one
By Daniel Nelson · #103706 ·
Re: Testing dummy loads with a VNA
What you missed Jeff is that he didn't state what sort of test equipment he had, and what frequency range he intended to use as well as connector types. With a modern piece of equipment like the
By Stuart Landau · #103705 ·
Re: HP 8591 external reference connector (1250-1499)
There's nothing particularly special about it,
By Dave McGuire · #103704 ·
Re: HP 8591 external reference connector (1250-1499)
A regular BNC cable will work fine.? It's just the "packaging" for mechanical convenience. Daun Daun E. Yeagley II, N8ASB
By Daun Yeagley · #103703 ·
HP 8591 external reference connector (1250-1499)
Hi all, I am working on getting an HP 89441A up and running (I am trying to measure the multi-path interference of received ATSC TV signals). Before I can dive into it, I need to gather the
By medasaro · #103702 ·
Re: Advice on Accessories for HP Equipment
At 2020-03-07 10:26 AM, Robert G8RPI via Groups.Io wrote: The 8590xE should have reference input. It is next to the fan on the rear panel and is conected to the reference output by a solid bar type
By Steve Hendrix · #103701 ·
Re: 693B sweep oscillator restoration
Just for a slightly alternate view: I think David's advice is sound, but too conservative in some cases. Some comments inserted below. -Pete I know that this is very common advice, but if you happen
By saipan59 (Pete) · #103700 ·
Re: Testing dummy loads with a VNA
First, you did not state what equipment you are using; that makes a lot of difference. Some network analyzers like the NanoVNA are complet and self contained; others are not. With those ports
By Stuart Landau · #103699 ·
Re: Testing dummy loads with a VNA
Uhhh...wha?? No. That's one thing that they can do, but the assertion that they are "intended" to only do thru measurements is false. Very, very false. I've never seen a VNA that is unable to do
By Dave McGuire · #103698 ·
Re: 693B sweep oscillator restoration
1. I had a manual problem with my 651B, Found several manuals which had portions with teh same circuit boards as my unit and that was good enough to get by. 2. Barring blowing any of it in sensitive
By David C <k_8_b_y_p@...> · #103697 ·
Re: Testing dummy loads with a VNA
Jinxie, Ideally, you would use a 85044a transmission / reflection test set. Those things cost quite bit, so you could use some kind of a bridge or coupler instead. A bridge out of a 8505 VNA would
By pianovt · #103696 ·
Re: Testing dummy loads with a VNA
I came in to the middle of this. But I sense mumbo-jumbo. After 40 years as a professional microwave engineer working with (and owning many) VNA's,I can say definitively that 1 port networks exist, as
By Jeff Kruth · #103695 ·