Specifications

Section-5 Maintenance
November 11, 2013
5‐20
Copyright©2013,HarrisBroadcast
WARNING:Disconnectprimarypowerpriortoservicing. 888‐2628‐300
STEP 9 Selecttheotherpredriverandrepeattheproceduretocalibratetheotherpredriver
poweroutput.
STEP 10 Endofprocedure.
Figure 5-1 Cab Pwr Calibrate Screen
5.9.6 SystemThresholdSettings
Figure 5-12 System Threshold Setting Screen
Table5‐4System>SystemService>SystemSetup>SystemThreshold
Field Explanation
FoldbackPwr
Setspwrlevel(Watts)wherepowerfoldbackbegins.Maximumvalueis2.8%ofnominaloutput
power,foraVSWRof1.4:1.Fora6kWdigitaltransmitterthiscorrespondstoareflectedpowerlevel
of168W.
FwdLowFlt Setspowerlevelwherepowerbarturnsredandafaultisenteredintothelog.
FwdLowWarn SetskWlevelwherepowerbarturnsyellow.
FwdHighFlt SetskWlevelwherepowerbarturnsredandfaultisenteredintolog.
ExciterA,BPwr
Setsvoltagethresholdwhereexciterswitchwilloccur.SeeSection5.9.6.1onpage5‐21for
instructions.
RfldPwr
Thisvaluemustbesetbythecustomer.Systemreflectedthresholdvoltage(setsthereflectedpower
triplevel)shouldbesettoapproximately100mVlessthanthedetectorvoltagelevelnotedin"5.9.3.1
CalibrateSystemReflectedPower"onpage5‐18.Fora6kWdigitaltransmitterthiscorrespondstoa
reflectedpowerlevelof578W,foraVSWRtrippointof1.9:1.