Specifications

Adjust the 'volume' control until receiver noise is heard.
The volume control adjusts the speech level at the loudspeaker. Clockwise
rotation increases the volume, anti-clockwise rotation decreases the volume.
Turn 'squelch' control clockwise just until the receiver noise disappears.
Note that this is the most sensitive setting of the squelch control. Turning the squelch
control further clockwise will suppress weak interfering signals.
If the receiver is fitted with a 'fixed squelch' then the volume control is used as
normal to obtain a suitable audio level when speech is being received.
If the radio is fitted with a 'squelch defeat' switch, this button may be used when
operating in very weak signal areas.
1.5.4.3 SPEECH TRANSMISSION
To avoid interfering with other users of the operating channel, listen first to ensure that no
transmissions are being made.
Make sure that the 'Busy' indicator is OFF.
Holding the microphone 2 to 3 centimetres from the lips, press the 'press-to-talk' switch (on the
microphone) and note that the transmit indicator is turned ON. Speak clearly across the face of
the microphone in a normal conversational manner.
Use the correct operating procedure, and keep transmissions short. Release 'press-to-talk'
switch as soon as the message is finished and note that the transmit indicator is turned OFF.
When the 'transmit limit timer' option is fitted the transmitter will be turned off at
the end of preset time, and a warning signal (if programmed) will be heard until
the 'press-to-talk' switch is released. Re-pressing the 'press-to-talk' switch will
turn on the transmitter.
If the 'transmit inhibit' option is fitted transmission will not be possible while a
signal is being received, as indicated by the Busy Indicator.
1.5.5 Other Functions
This section deals with mobile facilities that are not apparent from the front panel of the
transceiver, but which may significantly affect the operation of the transceiver.
These facilities are usually specially configured and require special operating practices which will
be explained by your system controller or in supplementary information sheets. If you are unsure of
how your equipment is configured with respect to these facilities you should contact your supplier.
1.5.5.1 TRANSMIT INHIBIT
If your equipment has the transmit inhibit facility programmed, you will be prohibited from
transmitting either with the 'press-to-talk' switch or with any 'Send' button whenever the radio
channel is busy and the 'Busy' indicator is on.
Section 1 Page 13