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LBI-39175
A
9
TRACKING DATA
The radio personality contains certain
information bytes known as Tracking Data, which allow
the radio computer to calibrate transmitter power,
modulation deviation, and squelch threshold. Normally,
no adjustments need be made to the radio to maintain
specified limits for the above parameters, since the radio
computer makes the necessary adjustments using the
Tracking Data established at the factory. However,
should Transmitter PA, Synthesizer, or Logic Circuit
boards be replaced, it may be necessary to alter the
Tracking Data to re-set these parameters properly.
Furthermore, if the Tracking Data is lost, specialized
procedures are required to load new Tracking Data.
therefore, it is
VERY IMPORTANT
to establish a record
of the Tracking Data of every radio as it is received from
the factory. The frequencies at which Tracking Data is
established are given in the "Test Frequencies" section.
TEST FREQUENCIES
The following frequencies are those for which
Tracking Data is established, and are used as Test
Frequencies:
Table 2 - Tracking Data Frequencies (Low Split)
Parameter RF Power Modulation
Deviation
Squelch Set
f1L (MHz) 136.0000 136.0000 136.0000
f1H (MHz) N/A 139.9950 N/A
f2L (MHz) 140.0050 140.0050 140.0050
f2H (MHz) N/A 143.9950 N/A
f3L (MHz) 144.0050 144.0050 144.0050
f3H (MHz) N/A 147.9950 N/A
f4L (MHz) 148.0050 148.0050 148.0050
f4H (MHz) 153.0000 153.0000 153.0000
Table 3 - Tracking Data Frequencies (High Split)
Parameter RF Power Modulation
Deviation
Squelch Set
f1L (MHz) 150.0000 150.0000 150.0000
f1H (MHz) N/A 155.4950 N/A
f2L (MHz) 155.5050 155.5050 155.5050
f2H (MHz) N/A 161.4950 N/A
f3L (MHz) 161.5050 161.5050 161.5050
f3H (MHz) N/A 167.4950 N/A
f4L (MHz) 167.5050 167.5050 167.5050
f4H (MHz) 174.0000 174.0000 174.0000