User's Manual

SECTION 2: FACTORY TEST PROCEDURE
401987 Page 15
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Final Test
A final test must
be performed prior to shipping the M32150-25 mobile radio to the customer. This final
test will verify that the timing characteristics are correct and that both transmit and receive data quality
readings are consistently high.
Perform the following steps for the final test:
Step 1 Attach the 40dB 100-Watt power attenuator to the transmit port of the radio.
Step 2 Program the radio for full power operation. The tx power level setting can be found in the
radio's Test Data Sheet.
The setting must not to exceed 60 Watts.
Step 3 Attach a digital scope to the base station as described in section the next section, Uplink
Hardware Timing Verification. Using the x=2000,19 command (which will cause the radio
to transmit 19 2000 character messages), verify the following:
Transmit frequency of radio is adjusted for minimum frequency error of +/- 100 Hz.
The x=2000,19 command will generate different messages with differing DC components.
Each message will slightly slew the frequency off from the center frequency). Be careful to
closely monitor the variation in transmit frequency due to these different messages and
ensure that on average the transit frequency error has been minimized to within +/-100 Hz.
This indicates that some of these test messages will be slightly high in frequency, some
messages will be slightly low in frequency, and some messages will be right on frequency.
Step 4 Verify the transmit deviation is 4.9 kHz
Step 5 Verify the timing characteristics are identical to the plots in the next section, Uplink
Hardware Timing Verification.
Step 6 At the base station monitor PC, verify that all the data quality readings are 240 and higher.
Step 7 Move the scope probes to monitor the timing at the mobile radio as described in Downlink
Hardware Timing Verification. Generate test messages by pinging the IPNC from the PC
attached to the radio. The following command will cause 100 pings, 500 bytes in length to be
transmitted from the mobile radio and echoed by the IPNC through the base station:
.>;Ping 192.168.3.3 -n 100 -l 500 -w 2000
Step 8 Set CRC =1 Enable on the radio
Step 9 Verify the timing characteristics are identical to those in Downlink Hardware Timing
Verification.
Step 10 Verify that both receivers on the mobile radio report data quality readings of 240 or higher
(248 is typical). This can be accomplished by installing the antenna on the TX/RX1 port and
verifying RX1 is selected by observing the RX1 LED on the mobile radio and installing the
antenna on the RX2 port and verifying RX2 is selected by observing the RX2 LED on the
mobile radio.