开云体育

Several have alluded to the TRANSFORM button on the NanoVNA, but I couldn't seem to find it on mine. Is this firmware-dependent, or do I need to make it appear by some secret handshake? My NanoVNA is neither a -H nor a -F, but the original.

It is firmware defendant. Look into doing a firmware update or buy yourself
a Christmas present.

That's too bad, but I believe I'll take your advice, and ask Santa for a new one, especially since it appears my battery is about to expand. And while I'm at it, do you know where I can get a new battery?

Batteries can be purchased online, or you can re-use a thin cellphone or iPod battery as a number of forum members (and I) have done.Just ensure the battery has the protection board built-in and is not just a raw cell.
I used a used 1300mAH iPod battery and replaced the 4 stand-offs with slightly longer ones. There are photos in the forum of user's mods.
Flashing firmware is slightly involved the first time but after that it becomes very easy. Follow instructions in the various user guides on the forum on YouTube.

If a model claims it has the TDR function, is that the same as it claiming to have the TRANSPORT function?

The battery will depend on the source where you got your unit.

Clicck on the "Display function on the first menu. This opens a second menu. The Transform function appears in the menu between "Channel" and "Bandwidth".
The menu starts with "Trace, Format, Scale, Channel, TRANSFORM, Bandwidth and finally, Back.
I am running FW 1.0.38. It also appears in the 1.0.33 FW and the AA_20200118 FW.
This latest FW has the SD card support. However, you need to find the version of NanoVNA you have, Original, H, F or one of the cheap knock offs, as well as the Firmware version in your VNA.
You may have to just upgrade the Firmware instead of buying a new one. That is unless you just want a new one.
I hope this helps.
Clyde Lambert KC7BJE