Vertex Standard VXR-7000 Service Manual page 26

Alignment
Set up the test equipment as shown below, and apply
AC power to the repeater.
The repeater must be programmed for use in the in-
tended system before alignment is attempted. The fre-
quency and other parameters are loaded from the file dur-
ing the alignment process.
In order to facilitate alignment over the complete
switching range of the equipment it is recommended that
the channel data first be uploaded and then stored to disk.
Channels at the upper, lower and middle band edges should
then be downloaded. The original data can be replaced at
the end of the alignment process.
Channel Frequency (MHz)
Type C
Low band edge 150.000 136.000
Mid 1 160.000 140.000
Center 162.000 143.000
Mid 2 170.000 145.000
High band edge 174.000 150.000
Alignment Setup
26
TypeA
J2001
TX Unit Alignment Points
Transmitter
Press the BASE/REPEATER switch on the front
panel of the repeater so as to set it to the "BASE" mode
if the REPEATER LED is on. You should see the RE-
PEATER LED turn off, indicating that the repeater is now
in the "BASE" mode.
PLL VCV (Varactor Control Voltage) Check
 Connect the DC voltmeter between the VCV check
point (on the TX Unit) and chassis ground.
 Select the High band edge channel, then key the re-
peater. Confirm that the DC voltmeter reading is 1.7 V
~ 2.4 V (Type C) or 1.6 V ~ 2.2 V (Type A).
 Select the Low band edge channel, then key the re-
peater. Confirm that the DC voltmeter reading is 3.9 V
~ 5.3 V (Type C) or 3.0 V ~ 4.0 V (Type A).
PLL Reference Frequency Adjustment
 Connect the Frequency counter to J2001 on the TX
Unit.
 Select the Center channel, then key the repeater.
 Adjust TC2001 (on the TX unit), if necessary, so that
the frequency counter reading is within ±100 Hz of
the programmed Center channel frequency.
Transmitter parameters (excluding PLL)
 The following transmitter parameters can be adjusted
from the computer by utilizing the CE27 Channel/
Alignment Program. Refer to the onboard help of the
CE27 Channel/Alignment Program for details.
TX Parameters
TX Power Level (High)
TX Power Level (Mid 1)
TX Power Level (Mid 2)
TX Power Level (Low)
Maximum Deviation
CTCSS Deviation
DCS Deviation
VXR-7000 VHF Service Manual
Data
0 (00h) ~ 255 (FFh)
0 (00h) ~ 255 (FFh)
0 (00h) ~ 255 (FFh)
0 (00h) ~ 255 (FFh)
0 (00h) ~ 255 (FFh)
0 (00h) ~ 255 (FFh)
0 (00h) ~ 255 (FFh)