Transmitting (cont.)
Trunked Systems
1.Turn the radio on and select the desired trunked zone and mode (see “Selecting a Zone and Mode”).
2.(SECURENET-equipped radios only). If the mode is programmed as neither secure-only nor clear-only, turn the two-position concentric switch to the desired
position ( 
= SECURENET voice transmission; 
= clear voice transmission).
3.Press and hold the PTT switch on the side of the radio and speak slowly and clearly into the microphone area. The red LED will be lit while the radio is transmitting. When your transmission is completed, release the PTT to listen.
Notes:
•If you hear a busy signal (a low-frequency “bah- bah-bah-bah”), release the PTT switch and wait for a call-back tone (sounds like “di-di-dit”). When you hear the call-back tone you will have three seconds to press the PTT switch, allowing you to make your call without getting another busy signal.
•If a continuous talk-prohibit tone is heard when the PTT switch is pressed, transmission is not possible. The radio may be out of range; or (SECURENET-equipped only) the two-position concentric switch may be in the incorrect position for that mode; for instance, the particular mode might be slaved encrypted voice and the switch set to the unencrypted voice position.
•Avoid blocking the noise-cancelling port during transmitting so as to take full advantage of the noise-cancelling feature.
•Transmissions on modes (talkgroups) that are programmed as neither secure-only nor clear- only can be changed from clear to SECURENET by turning the two-position concentric switch and pressing the PTT switch. However, you cannot change from SECURENET to clear during a transmission; you must wait until the transmission is ended before changing to clear operation.
•You will be able to change from clear operation to SECURENET operation, but not from SECURENET to clear during a call.
•If no secure voice channels are currently available for a SECURENET transmission that you wish to make, the display will show “NO SECURE,” and you must switch to a clear mode or wait until a secure voice channel is available.
