Operation
025-9567E 27
Direct Keying
1. Is PTT still closed and are the currently closed control relays same as the desired
control relays?
:Yes - Skip remaining steps here
2. Open PTT relay
Open control relays
Wait 150 milliseconds
SAMPLE CHANNEL BUSY
3. Is channel busy used and has it been busy for over 30 seconds?
:Yes - Skip remaining steps here
4. Close programmed control relays
Wait 150 milliseconds
Close PTT relay (if verify mode off)
Wait the programmed key-up delay
Close the audio relay
Sample Channel Busy
1. Is channel busy used?
:No - Skip remaining steps here
2. Is channel busy?
:No - Skip remaining steps here
3. Print “BUSY”
4. Issue a beep
Display “bUSY” momentarily
5. Is a key pressed?
:Yes - Skip remaining steps here
6. Is the 30 second time-out over?
:No - Go back to step 4.
7. Print “BUSY OUT”
Do not proceed with key-up for this call
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