Excalibur
User Manual
21
9M02-7573-A001-EN
Version 3.0
7.3
Changing the RF Channel
With this method of changing the RF channel, starting from the current channel which is indicated by the four
LEDs, the channel can be changed in the sequence shown in the tables below to a specific channel in the
respective frequency band or cluster.
7.4
Activating the Programming Mode
Prior to selecting the RF channel using the UP and DOWN buttons, the OCU unit must be brought into
Programming Mode by executing the following sequence:
Step 1:
Switch the OCU off and then keep the ON button pressed for approximately 5 seconds until the red
‘STATUS’ LED switches from permanently red to fast blinking red.
Step 2:
Within 3 seconds, press the UP and DOWN buttons (in the top row), first and second step, at the same
time.
Step 3:
The OCU is now in the programming mode
. The ‘STATUS’ LED blinks orange and the set RF channel is
indicated via a color using the four LEDs. Using this 4-LED color code, refer to the tables below to identify
the cluster and frequency of the set RF channel.
7.5
Selecting the RF Channel
While the OCU is in Programming Mode, pressing the first level of the UP and DOWN buttons selects the next
higher or next lower RF channel, respectively. The RF channels are scanned within the cluster.
Alternatively, holding down the second level initiates a fast run (approximately 0.3 seconds per channel) in order
to set the system to the desired RF channel.
When the desired RF channel has been selected, pressing the ON button stores the selected RF channel in the
OCU, exits the programming mode and switches off the OCU.
When the OCU is switched on again, it then transmits on the selected channel.
Note:
The first time the OCU is switched ‘ON’ after a channel change, it can take a few minutes before the
MCU has adjusted itself to the new RF channel and is ready for operation.
Note:
Depending on the TransKey configuration, not all channels will be available. Typically 10 or 11
channels spread over the complete band are available.
Note:
MCU must be in AUTOSCAN mode in order to be able to detect the RF channel change.
AUTOSCAN mode is set in the MCU TransKey.
7.6
Reverting to the RF Channel Preset in the TransKey
While the OCU is in Programming Mode, pressing the first level of the Transkey RF channel button and the ON
button re-activates the RF channel originally configured in the TransKey (i.e., the basic configuration). This action
resets to the Transkey default, exits the programming mode and switches off the OCU.
When the OCU is switched on again, it transmits on the RF channel stored in the TransKey.
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