Lyons NanoVNA - Page 51

08/09/2020 NanoVNA User Guide | NanoVNA User Guide
https://cho45.github.io/NanoVNA-manual/#7- トレース 状 態 51/51
Only CH is used for antenna adjustment, so calibrate all items except THRU and ISOLN .
The trace settings are as follows.
Trace 0: CH SWR
Trace 1: CH REACTA N CE
Trace 2: CH SMITH
Trace 3: OFF
CENTER Set the frequency you want to tune the antenna to, SPAN and set appropriately.
Look for frequencies where trace 1 displaying the reactance is near 0. Since the frequency is the tuning point, if there is a deviation,
adjust the antenna so that the tuning point comes to the target frequency.
If the tuning point is at the desired frequency, make sure that trace 0, which is displaying SWR, is displaying SWR that is low enough
(close to 1). If it does not show enough SWR (less than or equal to 2), use Smith chart to match. At this time, you can use an antenna
tuner directly below the antenna for matching.
If the SWR goes down, you're tuned to the frequency you want, and you're done with the low SWR antenna.
Cable check
You can simulate the TDR by using the time domain lowpass mode. TDR can be used to nd defects in transmission lines.
TODO
Common mode lter measurement
TODO