[TowerTalk] FA-VA5 question

[Lux, Jim]

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.