Copyright © 2015 RCA Communications Systems
RPX6500 P25 MOBILE RADIO - USER MANUAL
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6.5. TRANSMITTING
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 inches from your 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 analog channel, the
transmission will be analog 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.