User's Manual

SECTION 4: FACTORY TEST PROCEDURE
M64450G25-FCCRpt.doc Page 35
Transmitter Alignment Tests
Transmitter Output
Step 1 Set the Service Monitor to measure the transmitter frequency of the base station.
Step 2 Set the Service Monitor filters to “<20 Hz HPF” and “15 kHz HPF”.
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Ensure the Service Monitor can handle the full power transmission of the
base station otherwise attach an attenuator to the output of the base
station transmitter antenna port before transmitting into the Service
Monitor.
Step 3 Connect a coaxial cable from the output of the base station (or connected
attenuator) to the Service Monitor’s RF In port.
Step 4 In IPMessage, type the command “symbol sync time = 5000”.
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This will provide a steady modulated tone from which frequency error can
be measured.
Step 5 When ready to transmit, in IPMessage, type the command “X = 1” - The
transmitter frequency will be modulated with a 3.9 kHz tone.
Step 6 On the Service Monitor read the frequency error.
Step 7 Record the transmit frequency error on the Tune and Align Data Sheet -
Transmitter frequency error is controlled by the processor and cannot be
adjusted manually.
Transmitter Modulation
Step 1 Set the Service Monitor to measure the transmitter frequency of the base station.
Step 2 Set the Service Monitor filters to “<20 Hz HPF” and “15 kHz HPF”

Ensure the Service Monitor can handle the full power transmission of the
base station otherwise attach an attenuator to the output of the base
station transmitter antenna port before transmitting into the Service
Monitor.
Step 3 Connect a coaxial cable from the output of the base station (or connected
attenuator) to the Service Monitor’s RF In port.
Step 4 In IPMessage, type the command “symbol sync time = 5000”. This will provide a
steady modulated tone from which frequency error can be measured.
Step 5 When ready to transmit, in IPMessage, type the command “X = 1”. The
transmitter frequency will be modulated with a 3.9 kHz tone.
Step 6 On the Service Monitor read the deviation. Use RV2 to set the deviation between
4.7 and 4.9 kHz.
Step 7 Record the Transmit Deviation on the Tune and Align Data Sheet.