Sequence of Adjustments
Item 1
VCTCXO
Purpose: Checking and, if necessary, calibration of the reference frequency
generator for the synthesizers.
Input signal: -50 dBm RF signal of 935.0125 MHz at the antenna connector.
Test method: Radio test set in duplex mode, measured with a frequency
counter.
Test program settings:
1:1 Channel selection
2:2 TX ON at Power Level 2
15:0 AFC OFF
Measurement point: Transmitter frequency at antenna connector.
Value: 890.0125 MHz.
Tolerance: 2.2 kHz.
Procedure: If the transmitter frequency is not within 890.0103 - 890.0147
MHz use test option 18 and press M & 0 to calibrate the VCTCXO automat-
ically. When the calibration is done the new stored value will be displayed.
Note: Prior to an automatic calibration, test #15 must be set to its default value
(1 = normal operation).
Alternatively, the calibration can be done manually with the same test option.
To enable calibration and echo initial value, press M & #. Use the
▲
and
▼
buttons to change value and press M & S to store the new value.
SERVICE: Telephone
9
Содержание 1341-B
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