That's good to know. I would consider not being able to save stuff a
major shortcoming. If you want to make sure your beam is working in a
rough go/no-go kind of way (like in a field day scenario), it's not a
problem, but I like to have the capability to save plots without having
to drag around a computer.
Yeah, you had to be careful to make sure you shorted out the feedline
first before connecting the MFJ-269. I found that out the hard way. It's
probably a good habit to keep, as I am sure most of these small
analyzers are at least somewhat ESD sensitive.
73, Mike W4EF............
On 11/6/2021 7:46 AM, Lux, Jim wrote:
On 11/6/21 7:35 AM, Michael Tope wrote:
I just watched a video by W0QE from 2019 that indicated that the
NanoVNA doesn't allow you to save data to memory while using the unit
standalone. Do you know if that limitation has been remedied in any
of the new incarnations?
73, Mike W4EF..............
yes. some of the newer versions have an SD card. Some of the older
ones have the solder pads for the SD card holder, but no actual SD
card socket. Ditto serial port. The NanoVNA is the epitome of "price
sensitive" so there's no parts on there that don't need to be there.
The NanoVNA2, for instance, could stand to have some ESD protection
diodes on it. Some reports from people reporting symptoms that look
like zapped components. The original NanoVNA has resistive
terminations on both ports, so, should be pretty ESD resistant. I
wouldn't hook it up to a feedline that is actively sparking from the
charging of blowing dust or snow, of course.
Of course, the NanoVNA has TDR built in, so you don't need to save it
somewhere else.
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