Rss And Cps Procedures - Motorola ASTRO XTS 3000 Service Manual

XTS 3000 ASTRO Digital Radio Basic Service Manual
Use the following procedure for initial setup using an 8900 Series Modulation Analyzer.
Procedure 7-8 Initial Setup Using the 8900 Series Modulation Analyzer
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7.4.1 RSS and CPS Procedures

Use the following RSS procedure when applicable.
Procedure 7-9 RSS Procedure
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68P81083C85-A March 2004
Press the FM Measurement button. (Error 03-input level too low. This
indication is normal until an input signal is applied).
Simultaneously press the Peak– and Peak + buttons. Both LEDs on the buttons
should be lit.
Press the 15kHz LP Filter button. Continue with RSS or CPS procedure below.
From the TRANSMITTER ALIGNMENT menu press F4 to select the Transmit
Deviation Balance (Compensation) alignment screen.
Use the Tab key to select and to start alignment at the lowest frequency listed.
Press F4 to key the radio (80 Hz low tone). Wait approximately 5 seconds until
the frequency displayed on the analyzer settles.
Measure and record the deviation value from the 8901B analyzer or the AC
voltage value from the R2670
Press F4 to dekey the radio.
Press F6 to key the radio (3 kHz high tone). Wait approximately 5 seconds until
the deviation (8901B)/voltage (R2670) displayed on the analyzer settles.
Use the computer UP/DOWN arrow keys to adjust the deviation/voltage to within
+/- 1.5% of the value recorded for the 80 Hz low tone above (the goal is to adjust
the deviation/voltage of the "3 KHz high tone" injection as close as possible to
that of the "80 Hz low tone" injection).
Press F6 to de-key the radio.
Press F8 to program the new softpot value.
Repeat steps 3-8 for each of the remaining frequencies. Note – test frequency #7
(ex. 519.9750 MHz for UHF Range 2) is not normally used and therefore does
not require alignment.
Press F10 once to return to the TRANSMITTER ALIGNMENT menu.
RSS and CPS Procedures
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