Sennheiser Evolution Wireless Digital Series Instruction Manual page 46

The LED is flashing yellow:
The link between the transmitter and receiver is estab-
▷
lished.
The audio signal is overdriven (clipping).
▷
The LED is continuously red:
No link between the transmitter and receiver.
▷
The LED is flashing red:
The link between the transmitter and receiver is estab-
▷
lished.
The battery/rechargeable battery in the paired transmitter
▷
is low.
DATA LED
The DATA LED provides information on the receiver's Blue-
tooth Low Energy link to the EW-D Smart Assist app and on
the synchronization of transmitters and receivers.
The LED is flashing blue:
The Bluetooth Low Energy link is being established be-
▷
tween the receiver and a smartphone or tablet with the
EW-D Smart Assist app.
or
The receiver is being synchronized with a transmitter.
▷
The LED is continuously blue:
The firmware is being updated.
▷
The LED is off:
Normal operation
▷
There is currently no active data link.
▷
EW-D EM rack receiver
45