Sennheiser HDE 2020-D Instruction Manual page 17

The operating controls
CH 03
LINE
MIC
16
MUTE display
The red LED LOW BATT/MUTE
transmitter's microphone input is muted (see "Muting
the devices" on page 39).
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/deactivat-
ing the lock mode" on page 45).
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 for 5 minutes or when
the bodypack transmitter is muted, it automatically
switches to energy saving mode.
the display and the transmission signal is deactivated.
When an audio signal reaches the bodypack trans-
mitter, it automatically switches back to normal oper-
ation and the display displays the selected channel.
lights up when the
.
appears on the display when
"CH OFF" appears on