Vertex Standard VX-2500U, Руководство по обслуживанию, Страница: 14 / 79

14
Setup the test equipment as shown below, apply 13.8V
DC power to the transceiver.
The transceiver must be programmed for use in the in-
tended system before alignment is attempted. The RF pa-
rameters are loaded from the file during the alignment
process.
PLL VCV
Connect the positive lead of the DC voltmeter to
the test point
TP1007 (VCV) on the RF-Unit, as
indicated in the figure, and the negative lead to
chassis ground.
Set the transceiver to the high band edge fre-
quency channel, then adjust coil
L1017 on the
Unit for 4.25V (for Ver. D) or 7.50V (for Ver. CS1,
DS1) on the voltmeter.
Key the transmitter, and adjust coil L1020 on the
Unit for 4.25V (for Ver. D) or 7.50V (for Ver. CS1,
DS1) on the voltmeter.
Next select to the low edge frequency channel
and confirm above 0.80V to 1.50V on the voltme-
ter.
Key the transmitter, and confirm above 1.00V to
1.60V on the voltmeter.
PLL Reference Frequency
With the wattmeter, dummy load and frequency counter
connected to the antenna jack, and select band center fre-
quency channel, key the transmitter and adjust
TC1001
(Lot. 1~5) or VR1001 (Lot. 6~) on the RF-Unit, if neces-
sary, so the counter frequency is within 100 Hz of the chan-
nel center frequency for the transceiver version.
Alignment
Important
In order to facilitate alignment over the complete switch-
ing range of the equipment it is recommended that the
channel data in the transceiver is preset as the chart be-
low.
C
HANNEL
CH 1
CH 2
CH 3
CH 4
C
HANNEL
S
PACE
Wide
Narrow
Wide
Narrow
Ver. CS1
435.100 MHz
435.100 MHz
400.100 MHz
459.900 MHz
Ver. D
470.100 MHz
470.100 MHz
450.100 MHz
489.900 MHz
F
REQUENCY
(
S
IMPLEX
)
Transceiver
The alignment mode is accessed by “Alignment mode”
command from the computer whilst switching on. And it
is operated by the alignment tool automatically.
During the alignment mode, normal operation is suspend-
ed. Use the alignment tool program running on PC.
RF Unit Test & Alignment Points (Lot. 1~5)
TP1007
L1017
L1020
TC1001
Ver. DS1
485.100 MHz
485.100 MHz
450.100 MHz
519.900 MHz