Transmitter Power Output; Transmitter Modulation; Ctcss Modulation; Dcs Modulation - Standard Horizon HX370SAS Service Manual

Vhf/fm marine handheld transceiver
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Transmitter Power Output

Set up the test equipment as shown below for PLL
and Ttransmitter Section Alignment. Maintain the sup-
ply voltage at 8.4V DC for all steps.
Press the [ ] key momentarily to set the display to
HP
HP
HP." The transceiver now is in the Transmitter High
HP
"HP
Power Output Alignment Mode.
Press the [ PRESET ] key to enable adjustment of the
Transmitter High Power Output.
Press the PTT key to cause the transceiver to transmit;
if necessary, press the [
output power to 5.1 W (±0.1 W).
Press the [ PRESET ] key to exit the Transmitter High
Power Output Alignment Mode.
Press the [ ] key momentarily to set the display to
CP
CP." The transceiver now is in the Transmitter Me-
CP
CP
"CP
dium Power Output Alignment Mode.
Press the [ PRESET ] key to enable adjustment of the
Medium Power setting.
Press the PTT key to cause the transceiver to transmit;
if necessary, press the [
output power to 2.5 W (±0.1 W).
Press the [ PRESET ] key to exit the Transmitter Me-
dium Power Output Alignment Mode.
Press the [ ] key momentarily to set the display to
LP
LP." The transceiver now is in the Transmitter Low
LP
LP
"LP
Power Output Alignment Mode.
Press the [ PRESET ] key to enable adjustment of the
Low Power setting.
Press the PTT key to cause the transceiver to transmit;
if necessary, press the [
output power to 1.0 W (±0.05 W).
Press the [ PRESET ] key to exit the Transmitter Low
Power Output Alignment Mode.
] or [
] key to adjust the
] or [
] key to adjust the
] or [
] key to adjust the

Transmitter Modulation

Press the [ ] key to set the display to "dEu
ceiver now is in the Transmitter Modulation Align-
ment Mode.
Set the AF generator output to 50 mV rms @ 1 kHz.
Press the [ PRESET ] key to enable adjustment of the
Transmitter Modulation.
Press the PTT key to cause the transceiver to transmit;
if necessary, press the [
deviation to 4.3 kHz (±0.1 kHz).
Press the [ PRESET ] key to exit the Transmitter Modu-
lation Alignment Mode.

CTCSS Modulation

Press the [ ] key to set the display to "ton
ceiver now is in the CTCSS Modulation Alignment
Mode.
Press the [ PRESET ] key to enable adjustment of the
CTCSS Modulation.
Press the PTT key to cause the transceiver to transmit
(with no microphone input); if necessary, press the [ ]
or [ ] key to adjust the deviation to 0.6 kHz (±0.1 kHz).
Press the [ PRESET ] key to exit the CTCSS Modula-
tion Alignment Mode.

DCS Modulation

Press the [ ] key to set the display to "dCs
ceiver now is in the DCS Modulation Alignment
Mode.
Press the [ PRESET ] key to enable adjustment of the
DCS Modulation.
Press the PTT key to cause the transceiver to transmit
(with no microphone input); if necessary, press the [ ]
or [ ] key to adjust the deviation to 0.6 kHz (±0.1 kHz).
Press the [ PRESET ] key to exit the DCS Modulation
Alignment Mode.
Exit from the Alignment Mode
Press the [ 16/9 ] key to save the new setting(s) and exit to
normal operation.
Alignment
dEu." The trans-
dEu
dEu
dEu
] or [
] key to adjust the
ton." The trans-
ton
ton
ton
dCs
dCs
dCs." The trans-
dCs
11

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