HP (Hewlett-Packard) 8591C Cable Box User Manual


 
I
-
I
-
ZONE
CENTER
ZONE
PK LEFT
Spectrum Analyzer Mode Key Descriptions
Spectrum Analyzer Mode Functions
allows the zone markers to be moved in frequency without
changing the zone span. The zone markers are vertical lines
marking the zone on the upper window. They correspond
with the frequency range displayed in the lower window. As
the zone markers are moved the center frequency of the
lower window is changed but the lower window will not be
updated unless it is active.
The zone can be moved beyond the frequency range that
is being displayed in the upper window. Its movement is
limited to the frequency range of the analyzer. The zone
markers will be displayed at the edges of the upper window
when the zone is moved beyond the displayed frequency
range.
Front-Panel Key Access WINDOWS
IoNJ
searches for the next frequency peak outside and to the
left of the zone markers on the upper window trace and
then moves the zone so that it is centered around the new
peak. The zone span is not changed. The center frequency
of the lower window changes to reflect the new zone center
frequency. The lower window will not be updated until it is
made active. If no peak is found the zone will not be moved.
A signal must have a 6
dB
peak excursion to be identified
as a peak signal. The definition of a peak excursion can
be changed by selecting PEAK EXCURSN while the upper
window is active.
Pressing ZONE PK LEFT will have no effect if the upper
window is in zero span.
Front-Panel Key Access WINDOWS
loN)
6-155