TK-90
80
Item
Condition
Measurement
Adjustment
Specifications/Remarks
Test-
equipment
Unit
Terminal
Parts
Unit
Method
ADJUSTMENT
1. Final idling
1) Test mode
Ammeter
Rear
DC IN
Final
Check the default
current
Display f. : 13.1MHz
panel
current (Ii) of DC IN.
Mode : USB
Final unit VR1 to VR4 : MIN
VR1
Ii + 300mA = A
±
10mA
Transmit
VR2
A + 400mA = B
VR3
B + 400mA = C
VR4
C + 500mA
2. Current
1) Display f. : 13.1MHz
DC V.M
TX-RX
TX-RX
VR361 Turn to the left
protection
Mode : USB
completely.
pre-adjust
Transmit
VR362
3. Power gain
1) Menu No. : 7
PGC
[
] or Set the adjustment
2.5V
±
0.1V
control
(13.1MHz, USB)
[
]
value within the
reference
Transmit
limit of the specified
voltage.
5. S-meter
1) Menu No. : 3
SSG
Rear
ANT
[
] or Once push [
] or
S-meter lights up to S1 level.
(S1)
(13.2MHz, USB)
panel
[
]
[
] key to get
SSG f. : 13.201MHz
Oscilloscope
EXT.SP
S-meter level.
SSG output : –107dBm (1
µ
V)
AF V.M
Distortion
(S3)
2) Menu No. : 4
meter
S-meter lights up to S3 level.
(13.2MHz, USB)
DM. SP
SSG output : –81dBm (19.9
µ
V) Audio
analyzer
(S5)
3) Menu No. : 5
S-meter lights up to S5 level.
(13.2MHz, USB)
(Lights up all)
SSG output : –41dBm (1.99mV)
6. Selcall
1) Menu No. : 6
f. counter
TX-RX
FRQ
TX-RX
VR851 2210Hz
±
3Hz
(13.2MHz, USB)
7. NB gain
1) Display f. : 13.200MHz
DC V.M
TX-RX
NB
TX-RX
L326
Voltage min.
4.5V or less
Mode : USB
L327
PRE-AMP : ON
SSG
Rear
ANT
NB : ON
panel
SSG f. : 13.201MHz
Oscilloscope
EXT.SP
SSG output : –103dBm (1.58
µ
V) AF V.M
DM. SP
2) NB : OFF
→
ON
Noise G.
Adjust output of
Decrease pulsed noise.
noise generator to
S2, and check.
Item
Condition
Measurement
Adjustment
Specifications/Remarks
Test-
equipment
Unit
Terminal
Parts
Unit
Method
Transmitter Section
