05-4819A01, Rev. 08
LCT 450 Installation/Operation Guide
19
DKEY
Unkey Transmitter
This command deactivates the transmitter after it has been keyed with
the
KEY
command.
KEY
TX Key
This command activates the transmitter. See also the
DKEY
command.
MODEM [xxxx]
Analog/Digital Modem Selection
This command selects the radio's modem characteristics. For digital
operation enter
MODEM xxxx
, where
xxxx
equals the modem selection
of the radio (
9600
or
19200
). For analog operation with an external
modem, enter
NONE
for this parameter.
When the
MODEM
command is set to
NONE
, the analog TX Input and
RX Audio outputs of the
DATA INTERFACE
will be used to interface
with the connected external modem, and digital operation is disabled.
These levels must be set to complement the audio signal level require-
ments of the external modem. See “RXLEVEL [-20 to 0]” and
“TXLEVEL [-20 to 0, AUTO]” for details on setting these levels.
PWR [Watts]
NOTE:
This function may not be available in all units, depending on
certification requirements for a particular country.
TX RF Power Output Level
This command displays the current power level in watts or sets the
desired RF forward output power setting for channel 0 of the radio.
The
PWR
command parameter is specified in watts and its settings are
5
,
20
,
25
,
30
. The default setting is
5
watts. To read the actual (mea-
sured) power output of the radio, use the
SHOW PWR
command.
RX [xxx.xxxx]
Receive Frequency
This command displays the current receive frequency or selects the
radio's receive frequency (in MHz) for channel 0. The frequency step
size is 6.25 kHz.