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Have nanovna -H I think firmware 1070
Saver ver 3.9
When I measure swr on saver for a known antenna it never shows above 1.13 when I know it higher
on vna screen looks close to correct
what did I mess up and how to fix?
Thank you so much
Dave

Did you calibrate on saver and not just on the NanoVNA?

Do I need to do both?
I only did the nanovna calibrate

I read somewhere that if you use the nanoVNA alone you MUST calibrate on it, whereas if you use it attached to nanoVNA-saver, you MUST calibrate on the computer software.

I'll give it a try
Thank You

On nanovna-saver/README.md at master · NanoVNA-Saver/nanovna-saver · GitHub <> I have read that the calibration has to be done for the full sweeprange of interest on the NanoVna as well as in NanoVna-Saver.? When you start the Calibration assistant in NanoVna-Saver the textline in bolt is telling about the same.
After the calibration of the NanoVna? then 101 calibrationpoints has to be saved in Slot 0 (Save 0).
As soon as you press "Connect to device" in NanVna-Saver then Segments show 1 (101 datapoints/sweep).
Before you repeat the calibration procedure in NanoVNA-Saver you can determine if you? wish to refine your sweep with more than 101 datapoints
by changing the number in the Segments window of the NanoVna-Saver.
If you change this to 10 then you have 10 x 101 = 1010 datapoints. Then calibrate. Then measure your device.
Now if you wish to zoom in on your data then change your Start/Stop frequency in NanoVna-Saver.
If you like to do a new calibration within the specified frequency range in NanoVna-Saver do not forget to press the Reset button first to erase the previous Calibration data in NanoVna-Saver.
I am doing so as described above, using a NanoVna-H4 and NanoVna-Saver 0.3.9 and it works fine.

Op 15-10-2021 om 13:50 schreef AE5SB:

When using NANO Saver, the cal files can be stored on the PC/laptop, not in
the NANO. You can store them permanently on the PC and access them for
future use by just reloading them, provided everything is identical to the
original cal. At least that's how it works here. Your mileage may vary?

Dave - W?LEV

On Fri, Oct 15, 2021 at 12:32 PM Andrew Kurtz via groups.io <adkurtz=
[email protected]> wrote:

I read somewhere that if you use the nanoVNA alone you MUST calibrate on
it, whereas if you use it attached to nanoVNA-saver, you MUST calibrate on
the computer software.

On Oct 15, 2021, at 7:50 AM, AE5SB <snidrv@...> wrote:

Do I need to do both?
I only did the nanovna calibrate

--
*Dave - W?LEV*
*Just Let Darwin Work*

On Fri, Oct 15, 2021 at 04:50 AM, AE5SB wrote:

Do I need to do both?
I only did the nanovna calibrate

It is my understanding that you need to do both. The best suggestion I have seen is to do a broadband calibration and store it in memory 0. You definitely have to calibrate in NanoVNA Saver.

On Fri, Oct 15, 2021 at 02:12 PM, Jim Allyn - N7JA wrote:

It is my understanding that you need to do both. The best suggestion I have
seen is to do a broadband calibration and store it in memory 0. You
definitely have to calibrate in NanoVNA Saver.

Jim,

You don't have to calibrate In NanoVNA saver if the NanoVNA is calibrated and you are using the same frequency range in Saver.

Roger

Roger,

My NanoVNA-H4 presently has the following calibrated and saved configurations.

Recall 0 50kHz-900MHz
Recall 1 1MHz-31MHz
Recall 2 1MHz-61MHz
Recall 3 100MHz-200MHz

If I want to use NanoVNA Saver in the 1Mhz-61MHz range is it sufficient to load Recall 0 or do I have to load Recall 2 before running NanoVNA Saver? Do the calibrated ranges have to match?

Mike N2MS

On 10/15/21 5:13 PM, N2MS wrote:

Roger,

My NanoVNA-H4 presently has the following calibrated and saved configurations.

Recall 0 50kHz-900MHz
Recall 1 1MHz-31MHz
Recall 2 1MHz-61MHz
Recall 3 100MHz-200MHz

If I want to use NanoVNA Saver in the 1Mhz-61MHz range is it sufficient to load Recall 0 or do I have to load Recall 2 before running NanoVNA Saver? Do the calibrated ranges have to match?

Nope.. You can probably just turn it on (which recalls 0) and go from that.

On Fri, Oct 15, 2021 at 05:50 PM, Jim Lux wrote:

On 10/15/21 5:13 PM, N2MS wrote:

Roger,

My NanoVNA-H4 presently has the following calibrated and saved

configurations.

Recall 0 50kHz-900MHz
Recall 1 1MHz-31MHz
Recall 2 1MHz-61MHz
Recall 3 100MHz-200MHz

If I want to use NanoVNA Saver in the range is it sufficient to

load Recall 0 or do I have to load Recall 2 before running NanoVNA Saver? Do
the calibrated ranges have to match?

Nope.. You can probably just turn it on (which recalls 0) and go from that.

Jim ,

If he is calibrated on 50 KHz. to 900 MHz. and then sets the NanoVNA Saver to 1 1MHz-61MHz. there will be a lot of interpolation going on. Why not recall 2 and avoid this?

Mike - N2MS - Try both ways and see how they compare when measuring something like an antenna.

Roger

On 10/15/21 7:20 PM, Roger Need via groups.io wrote:

On Fri, Oct 15, 2021 at 05:50 PM, Jim Lux wrote:

On 10/15/21 5:13 PM, N2MS wrote:

Roger,

My NanoVNA-H4 presently has the following calibrated and saved

configurations.

Recall 0 50kHz-900MHz
Recall 1 1MHz-31MHz
Recall 2 1MHz-61MHz
Recall 3 100MHz-200MHz

If I want to use NanoVNA Saver in the range is it sufficient to

load Recall 0 or do I have to load Recall 2 before running NanoVNA Saver? Do
the calibrated ranges have to match?

Nope.. You can probably just turn it on (which recalls 0) and go from that.

Jim ,

If he is calibrated on 50 KHz. to 900 MHz. and then sets the NanoVNA Saver to 1 1MHz-61MHz. there will be a lot of interpolation going on. Why not recall 2 and avoid
this?

I would assume you'd do a cal in NanoVNA-Saver - the idea behind the "rough wideband cal" is to make sure you're not sending data to NanoVNA-Saver that it doesn't like.