LEICA TPS1200 - Manual (Page 73)

Operation TPS1200 73
Description of the LED Indicators
IF the is THEN
Power LED off power is off.
green power is on.
Link LED off no radio link to remote controller.
red radio link to remote controller.
Data Transfer LED off no data transfer to/from remote controller.
green or
green flashing data transfer to/from remote controller.
Mode LED off data mode.
red configuration mode.