CoolLED answers to TTL-in even though it's set to "on"

[carandraug]

This was tested with a pE-300.

When a channel is "selected" and "off" (SF in the CSS command) it will emit light in receipt of a TTL-in signal. When it is "selected" and "on" (SN in the CSS command) it is always emitting light. However, if a channel is "selected" and "on" and emitting light receives a TTL-in signal, it will start to emit light only in receipt of a TTL-in signal as if it was set to "off". Checking its state will still show SN.

To reproduce:

1. send command CSSCSN100 to select and turn on channel C at 100% power
2. note that it will emit light
3. send a TTL signal (high and then low) and note that the light turned off
4. send another TTL signal and note that the light is now answering to TTL signals
5. send command CSS? and note that the reply for channel C is still CSN100 (it should be CSF100 since it's not global "on")

There's actually two issues here:

1. if the channel is "on" then it should not be responding to TTL signals
2. if it responds to TTL signals, then it should change its switch state to "off"