4. Set tue spans.
Press
~.
SPAN is now displayeml
in
time active fmmmnctiona block, amauh the
SPAN softkev label appears mu imuverse vkheo to iunmiicatn thuat spain is tire
active fuumction. lIeu mice tine spamu to 20 M liz by pressimug the dosvmm
key,
or 20
MOm,
\l,Tluenn
thin peak of
a signn xl dunes unot dmlupermn onu time sc ‘mcmi, It mmmiv be
necessary
to auhjmnst time amnaphit mule level omu thin scm’eemu
.
lmness ~i~l’).
‘thin nanessage REF LEVEL .0 dBms aluiuunmmrs in tIme
active fmuuurtiomu hulock,
amid tire REF LVL soft key labumnl ahulmears mm imrvmncse video to imamhirdute tlnnmt
tine reference levu’i is tIne
act ice fmumictio~
,
TIme referemnce len-el is thin top
grath eWe hum
oum thin iiisImI55’ dsnul is set to 0.0 mIDmum
-
Cl
maungi
mg tine s’~Iinc of
Ian referemm cc level cli a
muges
thu e aiim
ph
itnun level of tine Iou grati
rum In line.
If desired, muse the reference level fuumuctiomm to niacin time signual 1ueak on tIne
screeni musimug time knobu
,
stu’p kunys
,
on mini
mnubm’ r morel mmmdi Is key im
ad
NEF
a
051,
ST’EN mz Cs
sn’,m nn
znncs
F’FFLL
,nn:,s’d
/cr-c’
LAST
AC5.’n
5,1
F-, F
LEOC
/Evies
am
az
MHz
seEn-n
so Sri
MFHZ
PEA BA dDz k”z
n’ss
30
k-az
NCR
Ca
S-NRC
Figure 1-4. Frequency Span Reduced to 20 MHz
5. Set thin anmuplitmudn.
1-8
Getting Acquainted with the Spectrum Analyzer
