Alignment - Vertex Standard VX-210AU Service Manual

The VX-210A has been carefully aligned at the factory for
the specified performance across the frequency range spec-
ified for each version. Re-alignment should therefore not
be necessary except in the event of component failure, or
altering version type. All component replacement and
service should only be performed by an authorized Ver-
tex representative, or the warranty policy may be void.
Required Test Equipment
m CT-42 Programming Cable with CE45 Channel Pro-
gramming Diskette
m RF Signal Generator with calibrated output level at
1GHz
m Deviation Meter (Linear Detector)
m AC Voltmeter
m SINAD Meter
m In-Line wattmeter with 5 % accuracy at 500 MHz
m Regulated DC Power Supply adjustable from 4 to 10 V,
3 A
m 50-ohm Non-reactive Dummy Load: 10 W at 500 MHz
m Frequency Counter: ±0.2 ppm accuracy at 500 MHz
m AF Signal Generator
m DC Voltmeter: high impedance
Before beginning alignment, connect the transceiver and
PC using the CT-42 Programming Cable, and run the CE45
Channel Programming Diskette, then download the EE-
PROM data from the transceiver to the computer. Then
store this data in a disk file so that it can be uploaded
when alignment is finished.
You should find the corresponding data file on the com-
puter disk for the transceiver version you are aligning, con-
taining channel settings for the high edge, middle and low
edge of the transceiver's frequency range in channels 1, 2
and 3, respectively. Up-load this file to the transceiver.
Channels
Low Band Edge (Channel 1) 450.000 MHz
Band Center (Channel 2) 470.000 MHz
High Band Edge (Channel 3) 490.000 MHz
Note: Signal levels in dB referred to in the alignment proce-
dure are based on 0 dBµ EMF= 0.5µV (closed circuit).
Version D Version CS Version AS1
440.000 MHz 400.000 MHz
455.000 MHz 415.000 MHz
470.000 MHz 430.000 MHz
PLL & Transmitter
Set up the test equipment as shown for transmitter align-
ment. Adjust the supply voltage to 7.2 V for all steps where
not specified otherwise.
50-ohm
Dummy Load
Inline Wattmeter
RF Sampling
Deviation Meter
Coupler
CT-42 connection
Cable
Frequency
Counter
PLL VCV (Varactor Control Voltage)
r Connect the DC voltmeter between TP03 on the chip
side of the Main Unit and ground.
r Set the transceiver to CH 3 (high band edge), and ad-
just L1004 on the chip side of the Main Unit for 3.6 V
(±0.1 V) on the voltmeter.
r Set the transceiver to CH 1 (low band edge), and con-
firm the low-end VCV is more than 0.8 V while trans-
mitting, and also while receiving.
L1004
TP03

Alignment

RF Signal
Generator
Transceiver
MIC/SP
Power Supply
PC
7.2V DC
COM port
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