QT-90W
– 7 –
1
MW IF: 455 kHz
(1) AM IF sweep
Let the MW ANT
Take out the signal Adjust T107 get MAX.
(1) Band SW in MW
generator with
coil close to the
from point TP4
output at 455 kHz
position
loop antenna
generator ANT.
(2) VOL. control in MIN.
(2) Alignment
position
oscilloscope
(3) Tune P.V.C. to
(3) Power supply
high end
2
MW
(1) MW sweep
Same as step 1
Same as step 1
Adjust P.V.C. (TC3)
Same as step 1
TRACKING fH:
generator with
get MAX. output at
1,650 kHz
antenna
1,650 kHz
(2) Alignment
oscilloscope
(3) Power supply
3
MW BAND
Same as step 2
Same as step 1
Same as step 1
Adjust T103 to get
Tune P.V.C. to low
COVERAGE fL:
MAX. output at 515 kHz end
515 kHz
4
Repeat step 2, 3 until no further improvement can be made.
5
MW BAND
Same as step 2
Same as step 1
Same as step 1
Adjust P.V.C. (TC4)
Tune P.V.C. to
COVERAGE fH:
get MAX. output at
1.400 kHz
1,400 kHz
1,400 kHz
6
MW TRACKING
Same as step 2
Same as step 1
Same as step 1
Adjust L109 get MAX.
Tune P.V.C. to
fL: 600 kHz
output at 600 kHz
600 kHz
7
Repeat step 5, 6 and then step 2, 3, 5, 6 until no further improvement can be made.
Step
Alignment
Frequency
Test Equipment
Signal-in
Signal-out
Adjust
Remark
MW Section
1
SW1 BAND
(1) SW1 sweep
Let the MW ANT
Take out the signal Adjust CT102 get MAX.
(1) Band SW in SW1
COVERAGE fH:
generator with
coil close to the
from point TP4
output at 7.4 MHz
position
7.4 MHz
antenna
generator ANT.
(2) VOL. control in MIN.
(2) Alignment
point TP1
position
oscilloscope
(3) Tune P.V.C. to
(3) Power supply
high end
2
SW1 BAND
Same as step 1
Same as step 1
Same as step 1
Adjust T104 get MAX.
Tune P.V.C. to low
COVERAGE fL:
output at 2.25 MHz
end
2.25 MHz
3
Repeat step 1, 2 until no further improvement can be made.
4
SW1
Same as step 1
Same as step 1
Same as step 1
Adjust CT104 get MAX.
Tune P.V.C. to 6 MHz
TRACKING fH:
output at 6 MHz
6 MHz
5
SW1
Same as step 1
Same as step 1
Same as step 1
Adjust T101 get MAX.
Tune P.V.C. to
TRACKING fL:
output at 2.6 MHz
2.6 MHz
2.6 MHz
6
Repeat step 4, 5 and then step 1, 2, 4, 5 until no further improvement can be made.
Step
Alignment
Frequency
Test Equipment
Signal-in
Signal-out
Adjust
Remark
SW1 Section
1
SW2 BAND
(1) SW2 sweep
Inject the RF
Take out the signal Adjust CT101 get MAX.
(1) Band SW in SW2
COVERAGE fH:
generator
signal directly to
from point TP4
output at 22.5 MHz
position
22.5 MHz
(2) Alignment
point TP1
(2) VOL. control in MIN.
oscilloscope
position
(3) Power supply
(3) Tune P.V.C. to
high end
2
SW2 BAND
Same as step 1
Same as step 1
Same as step 1
Adjust T105 get MAX.
Tune P.V.C. to low
COVERAGE fL:
output at 7.2 MHz
end
7.2 MHz
3
Repeat step 1, 2 until no further improvement can be made.
4
SW2
Same as step 1
Same as step 1
Same as step 1
Adjust CT103 get MAX.
Tune P.V.C. to
TRACKING fH:
output at 19 MHz
19 MHz
19 MHz
5
SW2
Same as step 1
Same as step 1
Same as step 1
Adjust T102 get MAX.
Tune P.V.C. to
TRACKING fL:
output at 8.5 MHz
8.5 MHz
8.5 MHz
6
Repeat step 4, 5 and then step 1, 2, 4, 5 until no further improvement can be made.
Step
Alignment
Frequency
Test Equipment
Signal-in
Signal-out
Adjust
Remark
SW2 Section
