2
BASIC OPERATION
2-6
Transmitting
Wait until the channel is clear to avoid interference.
Take the microphone off-hook.
q
• While scanning, the scan stops.
Wait for the channel to become clear.
w
• The channel is busy when the LED indicator lights green.
While holding down [PTT], speak at a normal voice
e
level.
Release [PTT] to receive.
r
NOTE:
To maximize the readability of your signal:
1. After pushing [PTT], pause briefly before you start
speaking.
2. Hold the microphone 5 to 10 cm (2 to 4 inches)
from your mouth, then speak at your normal voice
level.
Transmitting notes
D
• Transmit inhibit function
The transceiver has several inhibit functions which re-
strict transmission under the following conditions:
- The channel is busy.
- An unmatched CTCSS tone or DTCS code is re-
ceived, depending on the presetting.
- An unmatched or matched RAN code is received,
depending on the presetting.
- The selected channel is a ‘receive only’ channel.
• Time-out timer (TOT)
After continuous transmission for a preset time pe-
riod, the time-out timer causes the transceiver to stop
transmitting.
• TOT Rekey timer
Once transmission is cut OFF, it is further inhibited for
a period determined by the TOT Rekey timer.
• MDC 1200 system operation
The MDC 1200 signaling system enhances your trans-
ceiver’s capabilities. It allows PTT ID signaling.
When you push or release [PTT], the transceiver
sends your unit ID, if preset.
ID 0001
When receiving a PTTID
from unit ID ‘0001.’
