P25 SRM9030/9030
Plus
– OPERATING INSTRUCTIONS
TNM-U-E-0094
Oct 15 (Iss. 2.0)
Page 52
COMMON FUNCTIONS
6.5
T
RANSMITTING
WARNING
RADIO FREQUENCY RADIATION. A RF RADIATION HAZARD EXISTS IN
THIS EQUIPMENT. TO AVOID RF INJURY, DO NOT TOUCH THE
ANTENNA WHEN THE TRANSMITTER IS IN USE. DO NOT OPERATE
TRANSMITTER WITH ANTENNA DISCONNECTED. REFER TO THE
PERSONAL SAFETY PAGES.
To avoid interfering with other users of the channel, listen first to ensure no transmissions are
occurring. Make sure that the
“Speaker” Icons are not displayed.
If either of the speaker icons are displayed, there are transmissions present on the channel and the
user should not transmit. If required, the radio may be programmed to prevent transmission on a
busy channel.
Hold the microphone a few centimetres from the mouth, press the PTT switch and note that the Tx
LED is
Red
. Wait for a Grant tone then speak clearly across the face of the microphone in a
normal conversational manner.
In most systems it is important to wait a short time between pressing the PTT and commencing to
speak. This ensures that the path is properly established and avoids lost, truncated or distorted
speech.
Use the correct operating procedure and keep transmissions short.
Release the PTT as soon as you finish speaking your message.
The talk group for a transmission is usually associated with a channel selection. A talk group will
address all others that have the same TGID selected.
While on a P25 channel, the transmission will be P25 digital. For an analogue channel, the
transmission will be analogue FM.
Note.
A Transmit Limit Timer may be setup that limits a continuous transmission on a
channel. The last 10 seconds before the timer expires may be accompanied by
warning tones.
6.6
S
CAN
/V
OTE
F
UNCTIONS
The Scan/Vote Function allows the sequential searching of up to 16 channels if the selected zone
channel is programmed as a Scan channel, and 15 channels if the selected zone channel is
programmed as a Vote channel, for a valid signal (C CTCSS/DCS tone for Analogue FM or
NAC for P25). When found, the radio will stop on that channel until the signal disappears again.
To activate Scanning, select a channel that has been programmed as a Scan channel. Once
selected, the scanning will either start automatically, if programmed, or the programmed scan
function key will have to be pressed. (FPP configurable).
If a selected zone channel is programmed as a Vote channel, the voting will start automatically
without any other user intervention.
While listening on the channel, the user is able to PTT on that channel. After the signal
disappears, the radio will remain listening on the channel for a short time (FPP configurable,
typically 3 secs) before resuming scanning or voting.