Hi Bob,
a general point: Some (early?) firmware versions for the NanoVNA "only"
allowed operation up to 900 MHz. I suspect you have one of those - and that
you will need to upgrade your firmware in order to get it working in the
900-1500 MHz span.
In general: Upgrading to a newer firmware will probably also give you
higher accuracy, as some improvements were made to the way the measurements
were handled in the firmware. More knowledgeable list members can elaborate
on this, I'm sure.
--
Rune / 5Q5R
On Thu, 19 Dec 2019 at 03:16, Bob Albert via Groups.Io <bob91343=
[email protected]> wrote:
I have two nanoVNAs each with a different problem.
One refuses to accept any frequency above 900 MHz. I think I have had
that aspect working before but now am not so sure.
The other gives me a bad display on Smith chart, with the open circuit
near the middle rather than at the left. This one for sure worked fine
before.
Is there some kind of basic reset that can restore operation on the second
one, at least? The usual menu option RESET doesn't do it.
