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Hi, out of curiosity I've made a measurement of my nanovna H4 stock RG316 cable (of length 163mm end to end, incl connectors). NanoVna App shows 158.4mm, while H4 (Measure->Cable) shows almost

Thank you for doing this for us Mike

Not sure. I was using the spreadsheet to 1. Confirm that menu items were returning values I expected, so that I could update the manual with meaningful language 2. Explore data relationships. I

One port S11 measurement on a NanoVNA-H4 gives good results up to several thousand ohms (see attached 3K ohm example). It is better than using the S21 serial method. The S21 serial method does not

Rich, What is SWR:Linear? Roger

I updated this spreadsheet for the convenience of others by rearranging the columns and including instructions in the spreadsheet. ~R~ 72/73 de Rich NE1EE The Dusty Key On the banks of the Piscataqua

Thanks, Victor! 73, Costin, YO8RCD ?n lun., 30 mai 2022 la 12:16, Victor Reijs <pe1atn.victor.reijs@...> a scris:

Alright, thank you! Best Fabio

For a choke we want to determine high im[edance values and the one port is not really good in that (low accuracy). See here for some background:

Solved : just change line thickness and point size before closing window

Hi all, I don't know if this has been posted before, but I'll give it a try. I use the software on my Mac and all seems to run. But when I go to 'Display Setup' and check 'Show lines' the software

Thanks, just been reading the late G3TXQ articles. Very useful. He said a one port measurement is no good. Surely if I terminate the choke with a r ohm resistor , I can measure R + j X that way and

There are two methods to Convert S21 to Z. The series method is used for "high impedances" and the "shunt method" for low impedances. These are built into the latest firmware for H/H4 and in NanoVNA

I posted an updated version of this doc, which is the same content as the older doc, but because it contains more operational information, I renamed it to a user manual. I thought that I had sent a

The following files and folders have been deleted from the Files area of the [email protected] group. * /user manual and menu maps/nVNA-H4 v4.3_MS, firmware 1.1, Menu Items & Descriptions

Yes, disconnect all power for a while. The ultimate and first try to fix ANY and EVERY computer that I know of. Even my wife has learned that. Dave K8WPE David J. Wilcox’s iPad

Thanks, Roger. I'll give that a try. Perry [email protected]> wrote:

You might find this useful...I did it with real data from my -H4 and my EF 40 m wire. You can make a copy of this spreadsheet so that you have a backup. Then open it, and start a new spreadsheet.

Great thanks. Any body has a spreadsheet then to convert S21 gain and phase data into impedances?

I find the TDR method to be quite accurate. NanoVNA Saver works quite well. However all these methods need an accurate Velocity Factor (VF) input. The VF of an actual cable will often differ by +/- a