Re: HP 8591 external reference connector (1250-1499)
There's nothing particularly special about it,
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Dave McGuire
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#103704
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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
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Daun Yeagley
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#103703
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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
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medasaro
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#103702
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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
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Steve Hendrix
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#103701
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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
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saipan59 (Pete)
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#103700
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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
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Stuart Landau
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#103699
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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
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Dave McGuire
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#103698
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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
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David C <k_8_b_y_p@...>
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#103697
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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
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pianovt
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#103696
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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
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Jeff Kruth
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#103695
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Re: Testing dummy loads with a VNA
As Dave said, you need a coupler...probably something like this (although you probably don't need all this frequency range: https://www.ebay.com/itm/264629907766. The basic setup is: * Connect RF out
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Caesar Valenti
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#103694
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Re: Testing dummy loads with a VNA
If its a parallel connection, yes. Why not a series connection? VNAs are intended to do "thru' measurments on systems of a characteristic impedaance (probably 50 ohms) Some are able to do "single
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David C <k_8_b_y_p@...>
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#103693
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693B sweep oscillator restoration
Hi all, I came across a 693B sweep oscillator that's in pretty nice shape considering it's age. It seems to be fully functional, tunes accurately, etc. Front panel mechanicals seem to be in good
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Sean Turner
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#103692
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Re: Testing dummy loads with a VNA
S-parameter test sets don't have anything to do with active vs. passive. First thing's first, please read up on S ("scattering") parameters a bit, as I'm typing on my phone and explaining it would be
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Dave McGuire
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#103691
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Re: Testing dummy loads with a VNA
It's an HP 8754A. And I have a suitable phase-matched splitter (one in, three out). I was under the impression S parameter test sets were only needed for testing active devices under power. This is
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Jinxie
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#103690
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Re: Testing dummy loads with a VNA
Ack, sorry a directional coupler. But best to find an appropriate S-parameter test set for your VNA. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Dave McGuire
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#103689
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Re: Testing dummy loads with a VNA
Is this an 8505A? 8753? You need either a good splitter or (better) an S-parameter test set. THEN connect to port one. :) -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Dave McGuire
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#103688
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Re: Testing dummy loads with a VNA
I don't have a "port one". I've got one RF out and 3 inputs, R, A & B. That's all.
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Jinxie
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#103687
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Re: Testing dummy loads with a VNA
It's simplicity in itself: just connect it to port one, and measure S11. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Dave McGuire
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#103686
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Testing dummy loads with a VNA
Hi all, I can't find any info on how to connect a VNA for testing dummy loads. All the set-ups I'm seeing are for thru-line measurements for DUTs like filters which of course have input and output
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Jinxie
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#103685
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