[App_rpt-users] How do I setup channel B to generate a PL tone?

[Steve Smith]

I am using the RPi2-3 image on a Pi3 and the RB-USB-RIM.  I would like to set Channel B to output a PL tone of 110.9 Hz.  In SimpleUSB, I have set txmixb=tone.
I have set the level to 500.  Using an oscilloscope, I see no output from Channel B.  Where do I set the frequency and how do I enable it?

Tnx
Steve
N8AR
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