User Manual

SECTION 2: FACTORY TEST PROCEDURE

~\Technical Documentation\System Manuals\FCC-Reports\DT450-FCCRpt.doc Page 15

Step 7 In the lower message window type unlock=password (entering the appropriate

password) and click on the Send button. This command unlocks the radio Firmware for

programming.

It will be necessary to send this command periodically as the radio automatically

locks after three (3) minutes.

Step 8 Locate and make note of the TX Power = NNN parameter in the upper message window

of IP Message.

Step 9 In the lower message window type TX Power = 0 and click on the Send button. This

change reduces transmitter power output to about 1 mW for testing purposes.

Step 10 In the lower message window type X=2000,19 and click on the Send button. The radio

transmits 19 test messages of 2,000 characters each.

Step 11 Notice the frequency error shown on the monitor screen. Adjust pot R284 for minimum

error. Send the X=2000,19 command again if more messages required. Record this

value on the Mobile Data Radio Performance Test Data Sheet.

Step 12 In the lower message window type X=2000,19 and click on the Send button. Adjust pot

RV1 for 5.0 KHz deviation. Send the command again if more messages are needed to

make the adjustment.

The “X=2000,19” command will generate different messages with differing DC components.

Each message will slightly slew the frequency from the center frequency. Ensure that, on

average, the transmit frequency error has been minimized.

Step 13 In the lower message window type X=2000,19 and click on the Send button.

Step 14 Review the display of data quality on the calibrated Base Station System computer by

typing V to enable verbose.

Step 15 Slowly adjust pot RV2 until you get a data quality reading of 248 (Q = 248). The

minimum acceptable indication is Q = 240. Send the X=2000,19 command again if more

messages are needed to make the adjustment.

Step 16 In the lower message window type X=2000,19 and click on the Send button.

Step 17 Read the frequency error shown on the service monitor. If necessary, readjust pot R284

for minimum error. Record this value on the Mobile Data Radio Performance Test

Data Sheet.

Step 18 In the lower message window type X=2000,19 and click on the Send button. If

necessary, readjust pot RV1 for 5.0 KHz deviation.

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