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Look at the definitions of the 4 S parameters S22 is the reflection of signal reflected by the load. That is a major source of instability.

To rotate the device in a two parameters VNA works for any device. No matter if it’s active or passive . Unless you power the device via his ports. To rotate the device adds more uncertainly to

OK, but this only works for passive DUTs, one assumes? If you're testing an RF amplifier - for example - then it's not going to work, is it?

Yes. It's inconvenient, so higher grade VNAs have relay boxes to automate the task or more receivers and directional couplers. I was building such a setup for my VNWA and then wound up with an 8753B

Is that seriously all there is to it?

Turn the DUT 180 degrees.

Hi, Is there any work-around you can use to measure S12 and S22 using a cheapo VNA which is primarily designed only to provide S11 and S21 data? Thanks. J.

A number of instruments used the same indicators so you should find them fairly easily. Regards Nigel Adams-Marconi Instruments Heritage Collection

Following my July post [1], I got round to realising the exciter in a 100 x 100 x 50mm extruded aluminium enclosure powered by an external 7 - 12V "wall wart".? Power draw is about 2.5W. RF output

I have a 3497A with built in 5 ? digit meter. Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows

If you decide to use I2C anywhere, there's an I2C isolator chip, ISO1641 that has a fair bit of voltage isolation.? AVRs can do I2C reasonably well.? If you go serial, then likely standard

" signals. I don't like the architecture, but the 5 V TTL compatibility is very valuable. it with 3497A GPIB commands or solder headers in place, connect an ATMega and run bespoke >code on that." I

Thanks for the comment. Yes, I agree it can't be trivial to terminate these cables, particularly with excellent return loss at 10 or more gigahertz that some are rated, but yet it is being done at the

Interesting idea to split it up—get two (or three) caps for the price of one. I'm imagining a couple of selector switches to pick the positions of the decade divisions, then a couple more switches

My experience as well. Especially with the higher frequency/cost Cables. Ross Sent: Wednesday, September 06, 2023 7:29 AM To: [email protected] Subject: [Test Equipment

Hi, A good source of Precision Capacitors is Oscilloscope Horizontal Time / Division Timing Capacitors. A lot of the Tektronix TM500 Frequency/Pulse Function Generators use the same set of set of

Wow. I have never seen anyone put connectors on a piece of Gore cable and have the result be worth a damn! Many Gore cables with end severed/ripped off or broken have been canned over the years at the

You have a new follower! With best regards Tam HANNA Enjoy electronics? Join 21k4 other followers by visiting the Crazy Electronics Lab athttps://www.instagram.com/tam.hanna/

I recently completed restoring several Eico 3 decade and General radio 5 decade capacitance boxes.? While the GR units were very accurate (they were sold as precision units) surprisingly the Eico

I have built and repaired several resistor and cap substitution boxes, plus calibrated strings of resistors to make accurate voltmeter ranges.? Accuracy can be had, with a bunch of effort, tuning