I changed over to the battery mod yesterday and have since noticed that the LED power-on button behaves a little oddly.
When I switch on the Tx the power on LED glows brightly and evenly for three or four seconds, then it starts to flicker slightly. I never noticed it doing this before. The voltage reads 7.9 on the display. If I switch it on with the FrSky 3 position switch set to firmware upgrade position the LED only glows dimly (I think this is normal) but does not flicker .
Here's where it gets stranger. If the switches or throttle position cause the alert screen to show, the LED glows steadily...as soon as I disable the alert and the TX becomes active, the LED starts to flicker slightly...it's pretty fast, maybe 60Hz and still bright, just not steady.
I tested the Tx with a Rx and four servos and it seems to work OK on the bench. It bound OK and all the servos worked fine, though I haven't done a range test yet.
Anyone else have this phenomenon?
Is it something to worry about and what could be causing the LED to flicker slightly? It seems to only occur when the FrSky board is actually transmitting. For all I know it could be completely normal, but I'd like to confirm that.