Kenwood TS-440S Service Manual page 94

TS-440S
• TX ADJ USTMENT
Item
1 . TX A M P M 1 ) F R E Q : 1 4 . 1 7 5 0 M H z
M O D E : CW
C A R LEVEL contro l : MAX
R F u n it V R 4 : C E N ER
Disconnect ORV connector from R F
u n it . Then, connect as shown rig ht.
STBY : S EN D
2 ) Reconnect this connector after
adjustment .
2 . Base C u rrent
1 ) FREQ: 1 4. 1 750 M H z
M O D E : U S B
M I C L EV E i contro l : M I N
C A R LEVEL contro l : M I N
F I NAL u n it VR 1 , V R 2 : M I N
C o n n ect Ammeter
8J
: EXT Power supply
8 :
Power connector
Adjust to minimum cu rrent with VR 1
and VR2 in the Final unit.
STBY : S E N D
3 . 1 ) ALC 1 ) FREQ: 1 4. 1 750 M H z
(RF Output MODE: CW
power) CAR LEVEL contro l : ALC scale MAX
STBY : S E N D
2 ) Power 2 ) M ETER SW: PWR
meter STBY : S E N D
4 . P o w e r down 1 ) FREQ: 2 9 . 7000M H z
M O D E : CW
CAR LEVEL control: ALC scale MAX
Connect ACC socket pin (PD) to
50 W from N C .
STBY : S E N D
2 ) Reconnect this connector (PD )
to NC after adjustment.
5 . Protection 1 ) F R E Q : 1 4. 2000 M H z
M O D E : CW
Coax. cable to 1 50!1 dummy load
should be 1 m long.
STBY : S E N D
2 ) A N T : O P E N
M
6 . ALC meter 1 ) F R E Q : 1 4. 2000 M H z
O D E : U S B
MIC LEVEL contro l : M I N
C A R LEVEL contro l : M I N
M ETER S W : ALC
STBY : S E N D
2 ) C o n n ect t h e AG to M I C J ac k .
AG : 1 kHz, 5 mV
STBY: S EN D
3 ) AG : 6 d B i n c rease level
(1 k H z , 10 mV )
7. S p u rious FREQ: 2 1 . 2000 M H z
M O D E S W : CW
C A R LEVEL control: ALC scale MAX
STBY : S E N D
94
ADJUSTM ENT
Measurement
Condition Test
equipment
Oscilloscope
A m meter
P o w e r meter
P o w e r meter
1 50!l RF
dummy load
Power meter
P o w e r meter
P o w e r meter
AG
A F V M
Power meter
S pectrum
analyzer
Adjustment
U n it Terminal Unit Part
V R 5
RF O RV RF
T 1 3 ,
1 6, 1 7
( l / 4 W )
Final VR 1
V R 2
Rear panel A N T Filter VR 1
V R 6
Filter V R 3
Filter V R 2
Rear panel ANT
l m l m
r-
- - - - - -
-
I
�
I
- - - - - - - - - - - _ J
I
-
L
Rear panel A N T Filter VR4
VR4
Filter
V R 5
RF
VR4
S pecification/Remarks
M ethod
MAX
OS C I LLO
S C O P E
C u rrent drain F i rst adjust V R 1 and VR2 for
(Minimum cu rrent) minimum .
Adjust VR 1 for a n increase of
+ 200 mA
200 m A when switched t o
TX .
Then adjust V R 2 for 200 mA
over this reading .
Cu rrent d rain
(Minimum cu rrent)
+ D river cu rrent
w
(200 mA) + 200 mA
Caution: In no case should
95
the power be adjusted for
greater than 1 1 0 watts.
S e t to P W R meter
w w
g 5 W reading
50 ± 2 . 5
30W
- .,... ._ _ - . ,
I
I
I
1 8A o r less
Set to S meter " O " * If this adjustment is per-
formed, step 2 ) Base cu rrent
must a l s o b e performed .
Set to ALC meter
starting point.
�
Adjust f o r maximum
ALC scale reading
- 40 dB or less.
M I N