cool off amps

[ZeroChaos-]

we use the tx amps for the game, it would be nice to give them a short rest in between challenges maybe?

right now we spectrum paint, then send challenge, then recycle

I propose we spectrum paint, turn off amp, wait 3 seconds, send challenge, turn off amp, wait 5 seconds, then recycle

Amps are automatically turned on by opening the device with the string we use, turning them off is possible by running (with a real serial number):

bladeRF-cli -d "*:serial=1234" set biastee tx off

The added command to turn off the amp should only happen if the device string is set to enable the amp, but the sleeps are pretty safe to be unconditional I think.

In addition to cooling off the amps a little it will look pretty as they flash so we know it's working :-)