开云体育

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

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

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

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

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

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

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

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

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

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

I don't have a "port one". I've got one RF out and 3 inputs, R, A & B. That's all.

It's simplicity in itself: just connect it to port one, and measure S11. -Dave -- Dave McGuire, AK4HZ New Kensington, PA

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

Kuba, Thanks for sharing this method for reverse engineering. Pretty cool idea! Keith

An alternative these days is to run the debugged OS in a virtual machine, and sniff the transactions as they pass between the guest system and the emulated hardware, or even between the guest system

Hi if the picture shows all the packing then the packing was not correct I now take pictures before opening a package and then use them for the clam The big problem is people selling items on Ebay

Hi, 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 BNC to BNC link. 1PPM frequency meaurement could be a

I'd like to suggest getting one of Leo Bodnar's excellent GPSDOs. I have the 2 output version which I needed to run an SDRplay RSP2 and a VNWA 3E. I bought the outside mount antenna kit from Leo at

Hello together, Thanks for the Information, but I guess I was a little to late for that: And bought another one. unfortunately that one arrived like that: I guess the metal shielding was the problem

I used a FuturePlus FS2000 PCI Analysis Probe with a 16500C and 16700A many years ago for debugging USB host controller driver issues and needed to see what transactions were occurring on the bus.