Ericsson LBI-39175A User Manual

Page 9

LBI-39175A

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

f1H (MHz)

N/A

139.9950

N/A

f2L (MHz)

140.0050

f2H (MHz)

N/A

143.9950

N/A

f3L (MHz)

144.0050

f3H (MHz)

N/A

147.9950

N/A

f4L (MHz)

148.0050

f4H (MHz)

153.0000

Table 3 - Tracking Data Frequencies (High Split)

Parameter

RF Power

Modulation

Deviation

Squelch Set

f1L (MHz)

150.0000

f1H (MHz)

N/A

155.4950

N/A

f2L (MHz)

155.5050

f2H (MHz)

N/A

161.4950

N/A

f3L (MHz)

161.5050

f3H (MHz)

N/A

167.4950

N/A

f4L (MHz)

167.5050

f4H (MHz)

174.0000