Beyerdynamic UHF Wireless System Opus 900 User Manual

1. “ERR“ Message: When the “ERR“ message is displayed, there is an error.

ERR noo3: The frequency you want to program is above the switching bandwidth of the 
transmitter. Use a receiver with an appropriate frequency group. (At this time the microphone is
still operating and the frequency remains unchanged. To clear the displayed “ERR“ message
switch off the transmitter and on again.)
ERR noo4: The frequency you want to program is below the switching bandwidth of the 
transmitter. Use a receiver with an appropriate frequency group. (At this time the microphone is
still operating and the frequency remains unchanged. To clear the displayed “ERR“ message
switch off the transmitter and on again.)

2. “Group“ & “Channel“: When both indications are displayed, it means that you are using the

pre-programmed frequency of the receiver.

3. “Channel“: If “Channel“ is displayed only, it means that you are using a frequency which is not

pre-programed. 

• When the battery is exhausted, the LED      (TS 900 C only) will illuminate. Replace the battery.

When “PoFF“ is displayed, the transmitter is switched off to avoid an over-discharge of the battery.

When the ON/OFF switch is switched to “OFF“, at first “PoFF“ is displayed and as soon as the 
transmitter is completey off the display is blank. Wait one second if you want to switch on the 
transmitter again immediately.

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