12
Alignment
PLL Section
PLL Reference Frequency
r
Connect the wattmeter, dummy load and frequency
counter to the antenna jack, then set the transceiver to
128.000 MHz; now turn the transceiver off.
r
Press and hold in the
PTT
switch,
MONITOR
switch,
and
key while turning the transceiver on to enter
the alignment mode.
r
Rotate the
DIAL
selector knob to select “
RX TUNE xxx
.”
r
Press the
PTT
switch, and confirm that the counter
reading is 128.000.00 MHz.
r
If not:
1.
Press the
key momentarily;
2.
Rotate the
DIAL
selector knob clockwise (frequency
up) or counter-clockwise (frequency down);
3.
Press and hold the
key for 1/2 second;
4.
Confirm the counter reading.
r
Repeat above steps 1 - 4, so that the counter reading is
128.000.00 MHz (±100 Hz).
r
Turn the transceiver off.
Transmitter Section
AM TX HI Power Adjustment
r
Connect the wattmeter and dummy load to the an-
tenna jack, then set the transceiver to 128.000 MHz
and turn the transceiver off.
r
Press and hold in the
PTT
switch,
MONITOR
switch,
and
key while turning the transceiver on to enter
the alignment mode.
r
Rotate the
DIAL
selector knob to select “
AM TX Hi xxx
.”
r
Press the
PTT
switch with no microphone input, and
confirm that the RF output power is 1.5 Watts.
r
If not:
1.
Press the
key momentarily;
2.
Rotate the
DIAL
selector knob clockwise (increases the
power) or counter-clockwise (decreases the power);
3.
Press and hold the
key for 1/2 second;
4.
Confirm the RF output power.
r
Repeat steps 1 - 4, as necessary, until you achieve the
specified RF output power of 1.5 Watts.
r
Turn the transceiver off, then back on again, to pro-
ceed to the next step.
AM TX LOW Power Adjustment
r
Connect the wattmeter and dummy load to the an-
tenna jack, then set the transceiver to 128.000 MHz
and turn the transceiver off.
r
Reduce the power supply voltage to 4.8 V.
r
Press and hold in the
PTT
switch,
MONITOR
switch,
and
key while turning the transceiver on to enter
the alignment mode.
r
Rotate the
DIAL
selector knob to select “
AM TX Lo xxx
.”
r
Press the
PTT
switch with no microphone input, and
confirm that the RF output power is 0.3 Watts.
r
If not:
1.
Press the
key momentarily;
2.
Rotate the
DIAL
selector knob clockwise (increases the
power) or counter-clockwise (decreases the power);
3.
Press and hold the
key for 1/2 second;
4.
Confirm the RF output power.
r
Repeat steps 1 - 4, as necessary, until you achieve the
specified RF output power of 0.3 Watts.
r
Return the power supply voltage to 7.4 V.
r
Turn the transceiver off.
Содержание Spirit VXA-700
Страница 4: ...4 Note ...
Страница 5: ...5 Block Diagram ...
Страница 6: ...6 Connection Diagram ...
Страница 10: ...10 Note ...
Страница 32: ...32 AF Unit Note ...
