Sennheiser SYSTEM 2020 Instructions For Use Manual page 16

The operating controls
CH 03
LINE
MIC
14
MUTE display
The red LED LOW BATT/MUTE
bodypack transmitter's microphone input is muted
(see "Muting the devices" on page 35).
Note:
The muting function (MUTE) mutes the microphone
input only, not the line input
Lock mode icon
The lock mode icon
the lock mode is activated (see "Activating/
deactivating the lock mode" on page 40).
Display backlighting
After pressing a button, the display remains backlit
for approx. 30 seconds.
Display of the energy saving mode
When there is no audio signal or it is muted for
5 minutes, the bodypack transmitter switches to
energy saving mode.
and the transmission signal is switched off.
As soon as an audio signal reaches the bodypack
transmitter, it automatically switches to normal
operation and the display changes back to the channel
set.
lights up when the
.
appears on the display when
"CH OFF" appears on the display