Paused NanoVNA stops at random frequency of sweep range

[Ho-Ro]

BTW: I learned during this test that the pause command (both from the touch menu and the serial port) stops immediately at a random frequency in the sweep range. Shouldn't it either stop at START or even better turn off port 1 altogether?

Originally posted by @Ho-Ro in #26 (comment)

The most intuitive solution would be to mute port 1 (CH0) during pause instead of emitting random CW. This should be possible with reg 3 (CLK1_OEB=1; maybe also CLK0_OEB=1) and reg 24 (CLK0_DIS_STATE=00; CLK1_DIS_STATE=00) of Si5451.

@DiSlord et al.: What's your opinion?

[owenduffy]

Hi Martin,

Firstly, I think the pause should leave a complete measurement scan visible (if one exists). This might mean allowing the current scan to complete.

Secondly, my choice would be that a signal is emitted on Port1 ONLY when a scan is in PROGRESS.

FWIW.

Owen