User Manual

SECTION 2: FACTORY TEST PROCEDURE
~\Technical Documentation\System Manuals\FCC-Reports\IP8HPV\IP8HPV-FCCRpt.doc Page 13
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Receiver 2
Perform the following steps to adjust receiver 2:
Step 1 Inject an on-frequency carrier signal with an amplitude of -80 dBm, modulated with a 1 kHz
test tone at +/- 5.0 kHz deviation into Receiver 2's antenna port.
Step 2 The RSSI value should be between 1.3 and 1.5 VDC for a properly tuned radio. Record this
value on the Mobile Radio Performance Test Data Sheet.
Step 3 While monitoring the DC level of the recovered modulation, adjust potentiometer R93 for
2.500 VDC +/- 1 mV DC
Step 4 While monitoring the amplitude of the recovered audio signal, adjust potentiometer R99 for
350 mV RMS +/- 1 mV RMS.
Step 5 While monitoring the recovered audio signal at TP1, verify the distortion is less than 3%.
Record this value on the Mobile Radio Performance Test Data Sheet.
Step 6 While monitoring the recovered audio signal at TP1, verify the SINAD is -119 dBm or better.
Record this value on the Mobile Radio Performance Test Data Sheet.
Step 7 R93 and R99 are interactive adjustments; therefore, continue adjusting R93 for 350 mVRMS
and R99 for 2.500 VDC until further adjustments are no longer necessary. Record these
values on the Mobile Radio Performance Test Data Sheet.
Transmit Data
Perform the following steps to adjust transmit data:
Step 1 Use IPMessage to set the transmit power to 0.
Step 2 Using the x=2000,n command of IPMessage to generate transmit data messages while
observing the transmitted signal on the HP RF communications test set, adjust R33 for
minimum frequency error while transmitting data messages.
Step 3 Turn potentiometer RV2 fully counterclockwise.
Step 4 Adjust RV1 for a maximum deviation of 5 KHz.
Step 5 Using calibrated base station, and monitoring the uplink received data quality on the base
station's Hyperterminal screen, slowly turn RV2 clockwise until consistent data quality
readings of 240 - 248 are achieved using 2000 character test messages. Data quality
reading should not be less than 240 for 2000 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.
Step 6 Verify transmit deviation, frequency error, and transmitting data messages quality and record
this data on the Mobile Radio Performance Test Data Sheet.