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Spectrum Analyzer Mode Key Descriptions
Spectrum Analyzer Mode Functions
NTSC
allows you to trigger on the NTSC video format. Pressing
NTSC alters the TV line number that the analyzer triggers
on internally; the line number displayed when TV LINE #
is pressed does not change. Pressing NTSC changes the
video modulation to negative; set TV SYNC NEG POS
so that POS is underlined if positive video modulation is
required.
Front-Panel Key Access [TRIG)
OCC BW
%
POWER
allows the user to enter the percent of the power desired
when using the occupied bandwidth measurement under
the
Pcrwer
Menu
softkey.
When the power measurements
are Erst accessed the initial value for percent power is 99
percent. Once the value is changed, the new value will be
saved through an instrument preset or power-on. If the
occupied bandwidth measurement is active and the percent
power is changed, another sweep is taken and measured.
Front-Panel Key Access
C-1
OCCUPIED
BANDWDTH
integrates the power of the displayed and puts markers
at the frequencies containing a selected percent of the
power. The measurement defaults to 99% of the occupied
bandwidth power. The power-bandwidth routine Erst
computes the combined power of all signal responses
contained in the trace. For 99% occupied power bandwidth,
it then puts markers at the frequencies at which 0.5% of the
power lies to the right of the right marker and to the left of
the left marker. Thus 99% of the power lies between the
markers. The difference of the marker frequencies is the
99% power bandwidth and is the value displayed.
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