It looks like the cal may not be taking. RESET......COMPLETE
CAL.......STORE in a register. Go back and verify that the OSL displays as
it should. If not, OPEN CASE....INSTALL PROPER LOAD......from the inside
VERIFY WITH DMM that 50-ohms is measured correctly. All this to confirm
the center pin is mating correctly to the connector. Also do same with the
short and DMM.
Dave - W?LEV
On Fri, Mar 14, 2025 at 7:21?PM K3IY via groups.io <oconnorkl=
[email protected]> wrote:
I have been using my nanovna SAA2N for months without issues, and I bought
it from R&L who is an authorized distributer of legitimate Nanovna's. This
morning my issue started after I calibrated the unit. All of my traces
were erratic (see attached picture). Smith chart is a mess of zig zags
instead of arcs. I tried the following and nothing has fixed the issue.
"Reset" and "Reset All" prior to calibration. Tried multiple frequency
ranges and trace points. Tried using both cables. Tested the cables for
shorts/continuity. Tested all three standards (short, open, load) with an
ohm meter, unfortunately I don't have another set to try. Flashed the
firmware. Opened up the case and confirmed good solder joints and
continuity from the N connectors to the board. Wiggled the connections and
nothing changed. Checked again when the battery was fully charged. Also
tried using VNA View and got the same results. The unit was safely stored
in the case between the last time it worked and now. What am I missing?
--
*Dave - W?LEV*
--
Dave - W?LEV
