User's Manual Part 2

DASSoftwareConfiguration
84
RF Strip 1 XXX MHz Configuration Software Version 3.9
Softwarerelease3.9in
troducessettableReturnLossmeasurementsandcontroloveralarms.Thedefaultinterval
settingis“0”indicatingthereturnlossalarmfeatureisturnedoff.Returnlossalarmsareoftendisabledwhenthere
isapassiveantennanetworkinstalledbeyondtheremote.
Thedef
aultRe
turnLosssettingis"9".Theremotewillstartshuttingdownand/orPAdamagecanresultwitha
returnlossoflowerthan6.
Figure 94 FOR RF 1 Configuration, Software Version 3.9
4 Turnsdownlinklowpoweralarmonoroff.
5UplinkgainsettingforRFpathunderreview.
6
UplinkALCsettingforRFpathunderreview .Thisisthethresholdatwhich
thesystemwillstartreducingfurthergaintopreventincreasesinuplinkRF
totheFOI.After10dBdecreaseingainanuplinkalarmwill
betriggered
Note: Shouldbeleft
afactorydefault.OnlychangeifFOR
uplinkgainischanged.IfgainisincreasedonFORuplink
thenthesamevalueshouldbedecreasedontheALC.
Example:ChangingtheULFORgainfrom12to17wouldrequireALCtobe
changedfrom‐13to‐18.
7
HardwareAL
C
offsetmeasuredintenthsofa dB.Defaultsettingof60
(6dBm)shouldbeusedformostapplications.Shouldthesoftwarenotbe
abletoreduceuplinkgainfastenoughaftertheALCthresholdhasbeen
exceed,hardwareattenuationwillbeaddedtoprotecttheuplinkpath.In
theexa
mpleabov
e,thehardwareattenuationwilltriggerat‐7dBm(‐13dBm
ALCthresholdminus6dBmHWALCoffset= ‐7dBm)
8 TurnsuplinkRFonoroff.
9
Setsuplinktesttonefrequency.Mustbewithinuplinkfrequencylimitsof
theRFmodule.
10 Turnsonuplinktesttone.Testtonetimesoutafter60minut
es.
11
RetrievescurrentFORsettingsfromsystem.
Return Loss (db) VSWR
9.542 2.00
9.262 2.05
8.999 2.10
8.752 2.15
8.519 2.20
8.299 2.25
8.091 2.30
7.894 2.35
7.707 2.40
7.529 2.45
7.360 2.50
7.198 2.55
7.044 2.60
6.896 2.65
6.755 2.70
6.620 2.75
6.490 2.80
6.366 2.85
6.246 2.90
6.131 2.95
6.021 3.00
Item Description