21
Alignment
MAIN Unit Alignment Points
VR1001
VR1004
VR1005
TP1033
TC1001
VR1006
VR1002
VR1003
PLL VCV (Varactor Control Voltage)
Performance Check
r
Connect the DC voltmeter between test point
TP1033 on the MAIN Unit and chassis ground.
r
Set the transceiver to channel 3, and confirm
that the reading is about 4.5V (for Ver. A and
F) or 4.3V (for Ver. D).
r
Now select channel 1, and confirm that the
reading changes to about 0.9V.
r
Again select channel 3. Key the transmitter,
and confirm that the voltmeter reading is ap-
proximately 4.5V (for Ver. A and F) or 4.3V
(for Ver. D).
r
Once more select channel 1 and again key the
transmitter. Confirm that the voltmeter read-
ing is approximately 1.0V.
PLL Reference Frequency
r
With the wattmeter, dummy load, and fre-
quency counter connected to the antenna jack,
select channel 2.
r
Key the transmitter, and adjust TC1001 on the
MAIN Unit, if necessary, so that the counter fre-
quency is within 200 Hz of 415.000.00 MHz for
Ver. A, 465.000.00 MHz for Ver. D or 496.000.00
MHz for Ver. F.
Transmitter Output Power
r
Preset trimmer potentiometer VR1002 (MAIN
Unit) fully clockwise.
r
Select (Band center) channel 2. Key the trans-
mitter, and confirm that at least 30 Watts of
power output is measured. Now select chan-
nels 1 and 3, and confirm that 30 Watts of RF
power is present on the band edge channels.
r
Using the computer, re-program channel 1 for
“LOW” power output, and download this
data to the transceiver.
r
Select channel 2, and adjust (“HIGH” power)
potentiometer VR1002 for 25 Watts of RF power.
r
Select channel 1, and adjust “LOW” power) po-
tentiometer VR1003 for 5 Watts of RF power.
Transmitter Deviation
r
Select channel 2, and adjust the AF genera-
tor’s attenuator so as to deliver 50 mV output
at 1 kHz to the microphone jack.
r
Key the transmitter, and adjust VR1001 (MAIN
Unit) for ±4.3 kHz deviation as measured on
the deviation meter (tolerance: 100 Hz).
r
On the computer, re-program channel 2 to en-
able a 100 Hz CTCSS (encode) tone, and down-
load this data to the transceiver.
Содержание VX-2000U
Страница 9: ...9 VX 2000U 4ch Front Panel Block Diagram VX 2000U 40ch Front Panel Block Diagram Block Diagram ...
Страница 10: ...10 Note Block Diagram ...
Страница 11: ...11 Block Diagram VX 2000U Main Unit Block Diagram ...
Страница 12: ...12 Block Diagram Note ...
Страница 13: ...13 Interconnection Diagram VX 2000U 4ch Front Interconnection Diagram T9206689A Lot 6 ...
Страница 14: ...14 Interconnection Diagram VX 2000U 40ch Front Interconnection Diagram T9206689A Lot 6 ...
Страница 24: ...24 Note MAIN Unit Lot 1 ...
Страница 27: ...27 MAIN Unit Lot 4 Circuit Diagram ...
Страница 28: ...28 MAIN Unit Lot 4 Note ...
Страница 31: ...31 MAIN Unit Lot 7 Circuit Diagram ...
Страница 32: ...32 MAIN Unit Lot 7 Note ...
Страница 35: ...35 MAIN Unit Lot 10 Circuit Diagram ...
Страница 36: ...36 MAIN Unit Lot 10 Note ...
Страница 55: ...Display 1 Unit 55 Circuit Diagram ...
Страница 56: ...56 Display 1 Unit Parts Layout Side A Side B XN1213 9L Q2001 2003 2004 BU4094BCFV Q2002 DTC124EK 25 Q2005 ...
Страница 58: ...58 Display 1 Unit Note ...
Страница 59: ...Display 2 Unit 59 Circuit Diagram ...
Страница 62: ...62 Display 2 Unit Note ...