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Danish Interpretation Systems Technical Specifications
Printed in Denmark
55
6.2 Example 2 – Turning on the microphone of a delegate.
Assume, that a control unit has connected to a CU, entered microphone control mode and registered in
the CU. Furthermore, the microphone status has been retrieved from the CU.
Now, a chairman wants to turn on the microphone of a delegate. Assume this is the microphone with
the address number 10.
To turn the microphone, the external control unit must send the control message
MICROPHONE_CONTROL_MICROPHONE_ON (MICROPHONE_CONTROL_GRP).
Message format:
<START> ‘j’ <ID> <0> <MSB addr> <LSB Addr> <18> <14> <Microphone Addr MSB> <Microphone Addr LSB> <CRC>
<STOP>
With address=3900 and ID=45, we get the following:
‘j’ <45> <0> <15> <60> <18> <14> <0> <10>
CRC-calculation gives 140, and with <Start> and <Stop> added, the control message to send becomes:
<252> ‘j’ <45> <0> <15> <60> <18> <14> <0> <10> <140> <253>
or
[FC] [6A] [2D] [00] [0F] [3C] [12] [0E] [00] [0A] [8C] [fD]