Yaesu FT-450, Техническое дополнение, Страница: 10 / 69

ALIGNMENT-2
Alignment
Reference Frequency
Connect the Frequency Counter to TP2001 on the
RF-IF-Unit.
Adjust X2001 so that the Frequency Counter read-
ing is 22.625 MHz ±10 Hz.
2nd Local Carrier Output Level
Connect the RF millivoltmeter to TP2009 on the
RF-IF-Unit.
Adjust T2017 on the RF-IF-Unit for maximum
deflection on the RF millivoltmeter (more than
25 mVrms).
PLL VCV Voltage
Connect the Digital DC voltmeter (high-Z) to
TP2006 on the RF-IF-Unit.
Set the [ MODE ] switch to FM.
Referring to the table below, adjust the listed com-
ponents for the required voltage, or confirm that
the correct voltage is present on each frequency
listed.
RX IF Circuit (SSB/CW)
Set the following controls as indicated:
[
IPO ]: OFF
[ ATT ]: OFF
[ RF GAIN ] knob: Fully clockwise
Connect the AF millivoltmeter and 4 Ohm
dummy load to the EXT SPKR jack.
Connect the RF Signal Generator to the "ANT"
jack, and then set the output level to 0 dBµV at
the 51.995 MHz.
Set the transceiver to 51.995 MHz in the CW
mode.
Adjust T2020 on the RF-IF-Unit for maximum
deflection on the AF millivoltmeter.
RX IF Circuit (FM)
Set the following controls as indicated:
[
IPO ]: OFF
[ ATT ]: OFF
[ RF GAIN ] knob: Fully clockwise
Connect the SINAD meter and 4-Ohm dummy
load to the EXT SPKR jack.
Connect the RF Signal Generator to the "ANT"
jack, and then set the RF Signal Generator to
51.995 MHz at the level of 0 dBµV, ± 3.0 kHz de-
viation with a 1 kHz audio tone.
Set the transceiver to 51.995 MHz in the FM mode.
Adjust T2021 and T2022 on the RF-IF-Unit for
maximum deflection on the SINAD meter.
VFO-A F
REQUENCY
13.499 MHz
0.030 MHz
29.999 MHz
13.500 MHz
44.499 MHz
30.000 MHz
55.999 MHz
44.500 MHz
A
DJUST
/ C
ONFIRM
Adjust L2065
Confirm
Adjust L2066
Confirm
Adjust L2067
Confirm
Adjust L2068
Confirm
DC
VOLTMETER
5.2 V ± 0.1 V
At least 0.5 V
5.2 V ± 0.1 V
At least 0.5 V
5.2 V ± 0.1 V
At least 0.7 V
5.2 V ± 0.1 V
At least 0.7 V
TX IF Circuit (SSB/CW)
Connect the 50-Ohm Dummy Load and Wattme-
ter to the "ANT" jack.
Disconnect the TMP plug from J2002 on the RF-
IF-Unit, and then connect the RF millivoltmeter
and 50 Ohm dummy load to J2002.
Inject the 1 mV, 1 kHz audio signal to pin 5 of
MIC jack.
Set the transceiver to 7.000 MHz, USB mode.
Press the PTT button; adjust T2018, T2019, T2021,
and T2022 on the RF-IF-Unit for maximum de-
flection on the RF millivoltmeter.
Disconnect the RF millivoltmeter and 50 Ohm
dummy load from J2002 on the RF-IF-Unit, then
re-connect the TMP plug to J2002.