Ericsson ORION - Alignment Procedures; Introduction

LBI-3890
8
7
ALIGNMENT PROCEDURES
INTRODUCTION
All operations of this radio are controlled by an
embedded digital computer, which is programmed with a
personality unique to the customer. In order to align and
test the radio, it must be programmed with a specific test
personality, which will allow conventional operation on cer-
tain test frequencies. Certain tests can be carried out by
altering the personality. Furthermore, certain commands,
known as Test Mode Commands, cause the radio to perform
specific test functions. These will be noted as required in
the following alignment and troubleshooting instructions.
In order to program an
ORION
personality, the
radio and control unit must first be connected to a personal
computer through PC Programming Cable and Hardware
Programming Interface TQ3370, in one of the configura-
tions shown in Figure 2 or 3. Accessories may be connected
to the appropriate accessory cable 19B802554P1-P4 as
needed.
The PC must be equipped with the PC
Programming Software, Version 4.0 or later. It is assumed
in this manual that the Service Technician is familiar with
the operation of the PC Programming Software programs.
Consult the PC Programming Software manuals for further
details regarding this software.
Before bench testing the radio, be sure of the output
voltage characteristics of your bench power supply.
To protect the transmitter power output transistors from
possible instant destruction, the following input voltages
must not be exceeded.
Transmitter unkeyed 16.5 Volts
Transmitter keyed 16.3 Volts
(50 ohms resistive load)
Transmitter keyed 14.0 Volts
(No load or non-resistive load)
These voltages are specified at the normal vehicle battery
terminals of the radio and take the voltage drop of
standard cables into account. The voltage limits shown
for a non-optimum load is for "worst case" conditions.
For antenna mismatches likely to be encountered in
practice, the actual limit will approach the 16.3 Volt fig-
ure.
Routine transmitter test should be performed at EIA
Standard Test Voltages (13.6 Vdc for loads of 6 to 16
amperes; 13.4 Vdc for loads of 16 to 36 amperes). Input
voltages must not exceed the limits shown, even for
transient peaks of short duration.
Many commonly used bench power supplies cannot meet
these requirements for load regulation and transient
voltage suppression. Bench supplies which employ
"brute force"
regulation and filtering (such as Lapp
Model 73) may be usable when operated in parallel with
a 12 Volt automotive storage battery.
CAUTION