EFJohnson SMARTZONE 7780 - Manual (Page 77)

6-1
November 1999
Part No. 001-7780-500
ALIGNMENT PROCEDURE AND PERFORMANCE TESTS
SECTION 6 ALIGNMENT PROCEDURE AND PERFORMANCE TESTS
6.1 GENERAL
6.1.1 INTRODUCTION
The alignment procedure described in this section
should be performed if repairs are made that could
affect the factory alignment. In addition, before a
transceiver is initially placed in service, the perfor-
mance tests in Sections 6.8 and 6.9 should be
performed.
To perform the alignment described in this
section, special PCTune software (see Table 1-1) and
the same basic computer setup used for programming
is required. This equipment is shown above and also
described in Section 3.1. Only Remote Programming
Interface (RPI), Part No. 023-9800-000, can be used
because it is the only RPI that has microphone and
speaker audio jacks that are required for alignment.
Only two adjustments are made manually and the
others are made digitally using the PCTune software.
The two manual adjustments are squelch sensitivity
and TCXO frequency, and if they do not need to be
reset, the transceiver can be tuned without removing
the cover.
This transceiver does not have a special test mode
that is selected. The PCTune software automatically
selects the frequencies and other test conditions that
are required to perform the alignment. If the trans-
ceiver must be controlled manually to perform such
things as testing or troubleshooting, program tempo-
rary conventional channels.
6.1.2 TEST SETUP
Connect the test setup shown in Figure 6-1. Addi-
tional information follows on equipment in this setup.
Figure 6-1 Alignment Setup Diagram
Remote Programming Interface (RPI)
Signal Generator/ Wattmeter
50-ohm
Load
Comm. Monitor
Generator
Audio
PC-Compatible
Computer
Speaker Load
Part No. 023-9800-000
RPI-Transceiver Cable
Part No. 597-2002-123
680-Ohm