Sennheiser EM 3731 - Manual (Page 14)

12
Indications and displays
LEDs for booster supply of antenna inputs
The LEDs for booster supply of antenna input A N or B S light up when
y the booster supply voltage is applied to the corresponding antenna
input A O or B R .
The LEDs for booster supply of antenna input A N or B S go off when
y the booster supply voltage for the corresponding antenna input A O
or B R is switched off or
y the booster supply voltage is short-circuited or overloaded.