Transmitter Section - Kenwood TS-2000 Service Manual

Transmitter Section

Item Condition
1. Final idling 1) Display f. : 14.100MHz
current Mode : USB
(HF/VHF) Final unit (A/2)
VR1, 2, 3, 4 : MIN
Transmit
2) Display f. : 145.900MHz
Mode : USB
VR101, 102 : MIN
Transmit
2. 29.1MHz 1) Display f. : 29.100MHz
frequency Mode : FM
Transmit
3. Final idling 1) Display f. : 430.000MHz
current Mode : USB
(UHF) Final unit (B/2)
VR901, 902 : MIN
Transmit
4. TX BPF 1) Display f. : 145.900MHz K
(VHF) 144.900MHz E
Mode : CW
Disconnect the cable from
CN4 and insert a cable from
the spectrum analyzer.
Transmit
After the adjustment, con-
nect the cable to CN4.
• Perform the following in the adjustment mode. Item 5~8 and 12~28.
To terminate the adjustment menu in the middle, save your settings with Menu No. 124.
5. TX BPF 1) Menu No. : 15
(UHF) (Frequency : 435.1MHz)
Disconnect the cable from
CN3 and insert a cable from
the spectrum analyzer.
Transmit
2) Menu No. : 16
(Frequency : 420.1MHz)
Transmit
3) Menu No. : 17
(Frequency : 439.99MHz)
Transmit
4) Menu No. : 18
(Frequency : 449.9MHz)
Transmit
After the adjustment, con-
nect the cable to CN3.
ADJUSTMENT (K/E TYPE)
Measurement
Test-
Unit Terminal
equipment
DC. A Rear DC
panel
f. counter TX-RX1 CN14
(A/10)
DC. A Rear DC
panel
Spectrum TX-RX2 CN4
analyzer (A/11)
Spectrum TX-RX2 CN3
analyzer (A/11)
TS-2000/B2000/2000X
TS-2000S/2000V/2000SX/2000VX
Adjustment
Unit Parts Method
Final Check the default
(A/2) current (Io).
VR1 Io + 500mA = I
VR2 I + 1000mA = I
A
VR3 I + 700mA = I
B C
VR4 I + 700mA
C
VR101 I + 2000mA = I
B
VR102 I + 2000mA
D
TX-RX1 TC3 29.10000MHz
(A/10)
Final Check the default
(B/2) current (Io).
VR902 Io + 2500mA = I
VR901 I + 200mA
E
TX-RX2 TC12 IF output max.
(A/11) TC13
TC14 229MHz spurious
level min.
Front [+] key After setting the
panel or adjustment value
[–] key to 131, adjust the
TX-RX2 L90 trimmers and coils
(A/11) L91 to have a maximum
TC4 IF output.
TC5
TC6
TC8
TC10
Front [+] key Output gain max.
panel or
[–] key
Specifi cations / Remarks
±50mA
A
±100mA
B
±50mA
±100mA
D
±20Hz
±100mA
E
±20mA
8dBm or more
6dBm or more
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