Specifications

Section-5 Maintenance

October 17, 2013

5‐24

WARNING:Disconnectprimarypower priortoservicing. 888‐2693‐004

Figure 5-15 Analog Setup Screen 1 Analog Setup Screen 2

Figure 5-16 Analog Setup Screen 3

5.6.2.1 PreliminaryForwardCalProcedure

ThefollowingprocedureisdoneinitiallytoensurethatthetransmitterwillproducethedesiredTPO.TheFinal

AnalogCalProcedureSection5

.6.2.2onpage5‐26mustalsobeperformedtoensurethetransmitterwillmeet

analogs

pecificationsatthe100%synclevel.

STEP 1

Cali bratetheaveragingpowermeterpermanufacturer’sinstructions.

STEP 2 Connectthepowermetertotheforwardsampleportfromthepre‐filter

directionalcoupler.

Note

Ensure that the sample level present at this point (max system output, in dBm, minus the coupling factor)

does not exceed the maximum input range of the power sensor

Note

It is helpful to check the RF DAC value displayed (in Hex) on the calibration screen. In a system which is

properly configured and operating correctly, the low point power level should be obtained at a DAC value

of < 0x300. If you reach a DAC value 0x300 and are not close to the desired target for this step, please

verify that the system is configured correctly, especially if this is a first time turn-on or other service work

has been performed.

STEP 3 Enterthecoupler‐offsetvalue(dB)intopowermetertoallowdirectaverage

powerreadings.NOTE:Thepowermeterreadsaveragepower.Conversion

topeakvisualpowerisrequired.

STEP 4 SetthepowermetertoreadinWatts.