开云体育

There has been a lot of discussion on this topic in this group. Here are the links to help you get familiar with how to do it... /g/nanovna-users/message/19941

First impressions ----------------------- I loaded FW version 1.2.00-199 into my -H4 today and took it for a test drive. It would only boot occasionally and screen stayed dark most on most tries. I

Recent shipments of the -H4 are using the Chinese clone chip so you want the MS version. Check the label on the back of the device to see if it is marked MS. Latest FW is version 1.2.19 available at

Something to keep in mind, and was briefly discussed on this list several months ago - nano has "common ground" connecting both ports, and CMC usually does not. Calibration does seem to compensate for

Increase scale divisions to 2, or 5, or 10 - whatever is needed to bring the display into visibility, down from the top of the screen. It's like trying to read a 10 volt voltage with the voltmeter set

If your Nano came with 2 SMA cables like mine did, try the other one. It sounds like maybe the shield connection in yours is bad. -- Doug, K8RFT

OKthe raw details of setup to assist:- H4 with supplied pigtail to SMA/SO239 36 inch new direct bury M&P 7mm New PL259 compression plugs Either direct toDX Commander or Through a multiband choke No

You cannot load the H4 firmware on an H device - it wont work. You need to use the firmware with just -H in the filename (same version number ok). If yours is really a -H rather than a -H4, I would

The si5351 chip has failed so you need to replace it or buy another NanoVNA. si5351 are scarce so you may have to use the Chinese clone version of this chip. Roger

I bought this NanoVNA-H almost a year ago and it has always come up with "si5351 init Failed" Error. Yesterday I decided to see if a firmware upgrade would sort out the error. I no longer have the

Almost two years ago, I posted several tutorials to this group indicating how to measure both parameters. Those procedures should be in the archives in this group. Dave - W0LEV [email protected]>

Hi all, I wondered if there was a guide somewhere I could read showing me how to measure the Impeedance and Reactance of Common Mode Chokes. At this point in time I'm testing my chokes using S21 Gain

Yes it’s the small plastic with rocker so it’s the H I had this problem before for swr readings What should my scale divisions be set to My Elad shows my swr as a bit high, but won’t let me key

And even a different microprocessor! Firmware for one will NOT work on the other. -- Doug, K8RFT

Did you do a full calibration of the NanoVNA (for your frequency range)? My 3+ year old, unshielded clone works fine (for HF antennas, anyway). -- Doug, K8RFT

The Hugen -H/H4 firmware (or DiSlord FW) is not compatible with the Deepelec NanoVNA-F. There are significant hardware differences not the least of which is the screen resolution. You really need to

Greetings, I am curious about the route cause of the antenna VSWR measurement failure. As I understand it the internal missing shield problem (associated with the clones) just reduced the dynamic

Hugen made the -H, not the -F. The "F" has a 4.2 inch screen and a metal case. (I have both.) You could try installing a new firmware update, or do a full re-calibration. " my reading are all stuck

Which is of little consequence unless you are measuring high-isolation devices like filters or diplexers, and none at all for those doing one-port reflection measurements (antennas), which I suspect

On professional VNAs like the 8753, the internal isolation of the hardware is so good that the isolation calibration step is only useful if you are using a fixture that has isolation problems. For the