Standard Horizon HX270S, Руководство по обслуживанию

Страница: 11 / 28

11
Transmitter Power Output
Set up the test equipment as shown below for PLL
and Ttransmitter Section Alignment. Maintain the sup-
ply voltage at 7.5V DC for all steps.
Press the [
] key momentarily to set the display to
“
HP
.“ The transceiver now is in the Transmitter High
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 [
] or [ ] key to adjust the
output power to 5.0 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
.“ The transceiver now is in the Transmitter Me-
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 [
] or [ ] key to adjust 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
.“ The transceiver now is in the Transmitter Low
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 [
] or [ ] key to adjust the
output power to 1.0 W (±0.05 W).
Press the [ PRESET
] key to exit the Transmitter Low
Power Output Alignment Mode.
Transmitter Modulation
Press the [
] key to set the display to “
dEu
.“ The trans-
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 [
] or [ ] key to adjust the
deviation to 4.3 kHz (±0.1 kHz).
Press the [ PRESET
] key to exit the Transmitter Modu-
lation Alignment Mode.
ATIS Deviation Confirmation
Press the [
] key to set the display to “
Ati .“ The trans-
ceiver now is in the ATIS Deviation Confirmation
Mode.
Press the [ PRESET
] key, then press the [
H/L
] key twice
to set the display to “
CH
.“
Press the PTT key to cause the transceiver to transmit
(with no microphone input); confirm the the devia-
tion meter reading is 2.3 kHz (±0.3 kHz).
Press the [ PRESET
] key to exit the ATIS Deviation
Confirmation Mode.
Exit from the Alignment Mode
Press the [ 16/9
] key to save the new setting(s) and exit to
normal operation.
Alignment
R
ECEIVER
S
ECTION
A
LIGNMENT
S
ETUP
8.4 V DC
Regulated Power Supply
RF Signal
Generator
HX27 0S