Larry, thank you very much. I've found it!
Roy
WA0YMH
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On Wed, Oct 2, 2019, 7:05 PM Larry Rothman <nlroth@...> wrote:
Firmware archive in the files section
On Wed, 2 Oct 2019 at 7:54 PM, Roy Appleton<twelveoclockhigh@...>
wrote: Where can I find a copy of the "CLEAR_MEMORY_DFU" file?
Thanks,
Roy
WA0YMH
On Wed, Oct 2, 2019, 6:44 PM Larry Rothman <nlroth@...> wrote:
Bob,You don't need a torque wrench for this device - it's just not that
critical IMO. An alternative would be the small 3d printed rings that
were
discussed a couple of weeks ago. Also, take the front cover off the
display
and ensure that the SMA PCB mounts on that side of the board are
soldered.
Most aren't.
RegardsLarry
On Wed, 2 Oct 2019 at 7:00 PM, Bob Albert via Groups.Io<bob91343=
[email protected]> wrote: Well Herb I have no idea how to upgrade the
firmware. I do have the sharp program on my PC if that helps.
Anyway I am having a blast with this amazing unit. I can't believe it's
basically as good as boat anchor units costing 100 or more times as much.
And even includes a display and cal kit!
I was ready to order a different unit from a different vendor but that
doesn't appear to be necessary. I am going to shout from the rooftops
about this great instrument.
Sure it has its limitations but is wonderful nonetheless. I am getting
displays that, while not totally in agreement with my other gear, still
look very believable. Even the shape of the SWR vs frequency curves are
similar to my fancy VNA. And with the help of the sharp program I can
print results.
I am still learning about saving and recalling and such. I have some SMA
hardware on order that will simplify some of my testing. I am still
agonizing over the cost of a torque wrench; so far I haven't gotten one.
Another impressive characteristic is the accuracy of the frequency.
Putting it into CW mode generates a solid, precise signal. I wonder
about
the amplitude; I will see about measuring it on my SA. Perhaps it will
do
as a signal generator. It's well shielded, as I can't hear its signal
with
nothing connected to it.
Bob
On Wednesday, October 2, 2019, 03:17:32 PM PDT, hwalker <
herbwalker2476@...> wrote:
Bob,
If you ever decide to upgrade your firmware you may run into something
similar. My second NanoVNA arrived with only the 2 trace firmware
installed. When I tried to upgrade to the 4 trace firmware it wouldn't
take correctly. The solution was to first install CLEAR_MEMORY_DFU and
then install the 4 trace DFU. Its not always necessary, but I now use it
as a matter of course to prevent artifacts left over from the previous
install from causing hard to track down problems.
Herb
