User's Manual

F32700N25.doc Page 18
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Step 9 Turn potentiometer RV5 fully counterclockwise.
Step 10 Turn on the modulated transmit signal using transmit command “x = 1400,
19”
Step 11 Adjust RV6 for deviation of 4.9 kHz.
Step 12 Select the right combination of polarity for transmit and receive signals TX+/-
RX+/- out of four possible choices.
Step13 Using calibrated base station at the paired frequency, and monitoring the
uplink received data quality on the base station's Hyperterminal screen. With
the correct selection in step 12 the base station will receive data and the
carrier detect (green light) turns on. Slowly turn RV5 clockwise until consistent
data quality readings of 220 - 248 are achieved using 1400 character test
messages. Data quality reading should not be less than 220 for 1400
character messages.
If unable to reach the data quality readings then ask for Technical
Support. Poor data quality readings are indicative of poor group
delay performance, or other defect.
Step 14 Verify transmit deviation, frequency error, and transmitting data messages
quality and record this data on the Test Data Sheet.
Power Setting
Perform the following steps to adjust the transmit power control:
Step 1 Using the “ txkey=1” command of IPMessage, and while monitoring the
transmit power level on the HP communications test set, send the txpower=
x command to adjust the power level settings to slightly less than 5 Watts of
output power is obtained. Record this value on the Test Data Sheet.
Step 2 Adjust “maximum txpower = x”to the value that output power does not
exceed 5.0 Watts. Record this value on the Test Data Sheet.
Do not to exceed 5 Watts of output power, as this may reduce the life of PA.