Motorola GTR 8000 - Page 207

5.10.3VerifyingReceiverPerformance(DigitalOperation)
7MeasuretheBERandRSSI:
a.ClickStartBERMeasurement.
Stepresult:TheTestandMeasurementScreendialogboxdisplays:
•BERresultsinpercentage
•RSSIresultsexpressedindBm.
Withtheinitialsettingoftheservicemonitorsetforacarrierlevelof50dBm,youshouldexpecta
BERof0.0%andanRSSIlevelbetween48dBmand52dBm.Remembertocompensateforthe
lossofthecableconnectingtheservicemonitortothebaseradio.
Ifthereceiverisinhibited,RSSIwilldisplayameaninglessvalue.
b.ClickStartLogtocreatealoglefortheBERandRSSImeasurement.
Stepresult:TheLogSaveAswindowappears.
c.ChangetheRFlevelandreadtheBERandRSSIagainatthelevelappropriateforthebaseradio.The
valueshouldbelessthan5%.See1.9GTR8000BaseRadio/GPW8000ReceiverSpecications,page
1-12fortheappropriatevalue.
d.Keythetransmitterinthebaseradioandreadjustthegeneratoroutputleveluntil5%BERisindicatedon
theservicemonitor.Recordthislevel.
Stepresult:Lessthan1dBofdegradationshouldoccurduetothetransmittersbeingkeyed.
e.Dekeythetransmitter.
f.ClickStopBERMeasurementtostopthetest.
8Ifnofurthertestingisneeded,clickChangetoNormalModetoreturnthebaseradiotonormaloperation.
9Removeandrestorethefollowingconnectionstothebaseradio:
a.RemovetheservicemonitorGENportconnectionfromthebaseradioAntennaPort.
b.RestoretheAntennaconnectiontotheReceiveAntennaPort.
6871022P86-A-November20125-37