In [50e5f4501] I failed to account for a possible path through
TuningFrequency(), and removed a necessary call to SetChannelByString().

I big thank you to warpme for identifying the problem and solution.

Fixes #11989

(cherry picked from commit 5208a3a5512a4059b3cb59f4da65503003f3348f)
missed variable rename in Smolt data collection in ba8a1608cf

(cherry picked from commit 211989bea523f6a41b2e88c8e63cb37b56949955)