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Interesting discussion, re: return loss. There is a considerable difference between what can be obtained on the lab, or test, bench and an actual field installation. When discussing RTL measurement in

David, thanks for the good work, but I have one question,? 1.? With all of the equipment and access to the testing site, did you make the measurements at different times and different

With all my recent measurements of CMCs, I've been encouraged by several readers to put together a procedure for the various measurements I've made with the HP 8753C, but using the NANOVNAs and SAVER.

If I understood this correctly, lowish return loss may come from impedance missmatch between calibration standards, cables and attenuators. I have 2 sets of calibration standards and nothing else is

Hi Roger, I got the same pattern with both a SAA-2N & a AA-600 rigexpert over a similar range (1-30 mhz) when connected to a PC. I did both again using same no of points, same cal plane, etc but on

Another way to put it in perspective-the Anritsu FDR's bottom out at 54 dB RL. That's as far as it can measure. So 40 dB is really good, and should be enough for just about anybody.

I'm also wondering about these. I seem to be seeing that maybe the SAA2N is a little better for things like checking cavities and the like, which is one primary use I would have. True/false? Opinions?

The required ultimate return loss measurement accuracy depends on what you want to do. For just looking for 50 ohm antenna matching.25-30 dB return loss measurement capability is sufficient. For

Thanks so much for the help, everyone take care. 73 Christoph — https://a-dx.com

Hello, Where can I find latest Nanovna v2 3.2 inch firmware? On the github repository the latest is dated 20201013, while it looks more recent versions are available, like 20201122. Thanks, Simone

Christoph, Aliexpress, vendor is Deepelec, this is the official vendor, everyone else is a clone on Aliexpress or anywhere else. Stay safe. John VE7KKQ

Use menu to go to DISPLAY then TRACES then select the other two which are off.

As a newcomer, is it permissible to ask the question, which has certainly been asked many times, where - from a European perspective - it makes most sense to order a VNA-F? There are so many offers

The following numbers are from https://www.markimicrowave.com/blog/wp-content/uploads/2016/11/return-loss-to-vswr.pdf Return Reflection VSWR Transmitted Loss Coefficient Power 10 dB 0.316 1.92 90% 20

40 dB return loss is an SWR of 1.02. If you calibrated with a load that was exactly 50 ohms and the DUT was purely resistive it would be 50.1 ohms at this SWR. However the loads supplied with the

Consider the magnitude of that measurement in terms of %.? For practical uses, anything over -40 dB is meaningless unless you are comparing a part specification.? Like it is supposed to be >-45

In theory down to 90dB. If I calibrate and measure with my DIY standard I get those figures in the HF range. But that's mostly meaningless. You have to remember that these are relative measurements,

Thanks Robin, that is most helpful. After your post I looked around and found a short type C to A cable, and sure enough the VNA was fine. It was just the cable squeezed into the box that must have

This is a return loss to VSWR table. At 40 dB return loss the VSWR would be 1.02:1. A return loss of 14dB/VSWR 1.5:1 would be good for a typical filter. *Clyde K. Spencer*

I just noticed that I can't get return loss better than about 40dB even with a 30dB attenuator. With 60cm/2 feet of RG58 cable the return loss was wavy like with impedance missmatch. I have calibrated