Does the nanoVNA have a TDR function? For some reason I thought it did, but
I can't find it in the menu.

Zack W9SZ

<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail>
Virus-free.www.avast.com
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail>
<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

Yes, it is not labeled 'TDR' in the menus. Instead it is appropriately labeled 'Transform', since it is not a true TDR, but simulation of a TDR via Fourier Transform. On the menus: Display -> Transform. Usually the "Low Pass Impulse" is an appropriate selection. There are some videos you can find online that describe its use. Also messages in this group from a long time ago. It requires setting up the frequency scan range appropriately for the corresponding time-length you require, which can be a bit counter-intuitive, and you need to take care to set it appropriately to avoid aliasing, which would give a false answer. But it works very well once you know how to set it up.
Stan KC7XE

About differences TDR and VNA TDR
https://incompliancemag.com/time-domain-measurement-tdr-or-vna/
https://coppermountaintech.com/what-is-the-difference-between-tdr-and-vna-time-domain-measurement/

Also about VNA TDR options
https://helpfiles.keysight.com/csg/m9485a/applications/timedomain.htm

Great references, thanks!