User Manual

SECTION 2: FACTORY TEST PROCEDURE
~\Technical Documentation\System Manuals\FCC-Reports\IP1HPV\IP1HPV-FCCRpt.doc Page 13
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 While monitoring the voltage at RSSI2 Test Point with a DMM, adjust the two (2) poles of
filter FL8 for the maximum RSSI voltage. These two (2) poles are interactive; therefore,
continue adjusting first one pole and then the other until no further improvement can be made
in the RSSI voltage.
Step 3 Repeat the above procedure for FL7 (adjusting both poles). The two (2) poles of FL7 are
interactive; continue adjusting both poles until no further improvement can be made in the
RSSI voltage.
Step 4 While monitoring the voltage at RSSI2 Test Point with a DMM, adjust trimmer capacitor CV4
for the maximum RSSI voltage. The RSSI value should be between 2.8 to 3.0 VDC for a
properly tuned radio. Record this value on the Mobile Radio Performance Test Data
Sheet.
Step 5 While monitoring the DC level of the recovered modulation, adjust potentiometer R99 for a
reading of 350 mV (+/-10 mV) RMS.
Step 6 While monitoring the amplitude of the recovered audio signal, adjust potentiometer R93 for a
reading of 2.500 (+/-10 mV) VDC.
Step 7 While monitoring the recovered audio signal at TP1, verify the distortion is less than 3%,
adjust CV4 if necessary to achieve less than 3% distortion. Record this value on the Mobile
Radio Performance Test Data Sheet.
Step 8 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 9 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.