Beyerdynamic Unite TH, Quick Start Manual

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Unite TH – Handheld Transmitter
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Use with individual group ID
If several receivers are to be divided into different
groups, for each group an individual group ID can
be assigned. A separate audio encryption key is
generated for an individual group ID in order to
ensure additional security against unauthorised
listening. This audio encryption key is generated
during the pairing process, stored in the charger and
transmitted from the charger to the transmitter and
receiver, along with the channel name and group ID.
Since the audio encryption key is not transmitted via
radio, it cannot be read out. This gives the system
maximum security against unauthorised listening.
The receivers can only connect to a transmitter with
which they have been paired. If the group ID is
subsequently set manually on the receiver, no
connection can be established because the audio
encryption key does not match. Please note that the
transmitter to which the receivers are to be
connected must be defined as the master.
5.1 Encryption
The audio data is always encrypted with an AES-256
code to ensure a secure transmission.
The required key
will be generated within the charging unit itself and
transmitted to the transmitters and receivers during the
pairing process.
As the key is not transmitted via radio, the system is even
better protected against eavesdropping.
Should the receiver receive a different encrypted audio
signal for which no key has been saved, the received
audio signal will be muted. The receiver display will also
alternate between showing the relevant channel name
and the “KEY!” error message.
The encryption of the audio signal is shown schema-
tically in the following diagram.
Encryption
RP
RP
A
A A
B
TH
Pairing
KEY!
80
Note: Only group ID 256 uses a factory-defined key that
cannot be changed. You can use this group ID for a
system without pairing.