Kenwood TK-90 Service Manual page 76

TK-90
MCF Section
Item Condition
1. TX MCF 1) Display f. : 13.200MHz
(73.095MHz) Mode : USB
Spectrum analyzer setting
Center f. : 73.095MHz
Frequency span : 100kHz
Xdb/DIV : 10dB
RBW : 300Hz
VBW : 100Hz
Disconnect the cable from
CN2 (DRV).
Transmit
After the adjustment,
connect the cable to CN2.
2. RX MCF 1) After the adjustment of
TX MCF.
REF –30.0 dBm
10 dB/
VBW
100 Hz
RBW
300 Hz
POS PK
VBW
100 Hz
SWP 8 s
Receiver Section
Item Condition
• To terminate the adjustment menu in the middle, save your settings with Menu No. 48.
1. Receive 1) Menu No. : 1
AGC (13.2MHz, USB)
reference SSG output : OFF
2. RF IF gain 1) Display f. : 14.200MHz
Mode : USB
PRE-AMP : ON
AGC : FAST
*AF output : 0.45V/4Ω (LV7)
SSG f. : 13.201MHz
SSG output
: –115dBm (0.398µV)
*: When the volume cannot be decreased, verify the value set for "Minimum Volume".
76
When "Minimum Volume Type" is set to "Lowest Limit" in the FPU, the volume cannot be decreased lower than the value set for the "Minimum Volume".
ADJUSTMENT
Measurement
Test-
Unit
equipment
Tracking TX-RX CN4
generator
Spectrum
analyer
ATT 10 dB
SAPN 100 kHz CENTER 73.095 MHz
Fig. 1
Measurement
Test-
Unit
equipment
DC V.M TX-RX AGC
SSG Rear
panel
Oscilloscope
AF V.M
DM. SP
Adjustment
Terminal Unit Parts
TX-RX L122 Adjust the top of
(TP1) L123 the waveform as
L124 flat as possible.
CN5
(TP2)
L120
L181
REF –30.0 dBm
10 dB/
VBW
100 Hz
RBW
300 Hz
POS PK
VBW
100 Hz
SWP 8 s SAPN 100 kHz
Adjustment
Terminal Unit Parts
[ ] or Set the adjustment
[ ] value within the
limit of the specified
voltage.
ANT TX-RX L451 AF output max.
L452
EXT.SP
Specifications/Remarks
Method
Fig. 1
Fig. 2
ATT 10 dB
CENTER 73.095 MHz
Fig. 2
Specifications/Remarks
Method
2.8V± 0.05V