Chapter 2 199
Front-Panel Key Reference
Sweep
Interaction with Other Analyzer Functions
Certain conditions prevent segmented sweep from being activated,
while others cause this mode to be turned off. For analyzers with
Option AYZ, the mixer frequency range (
Input, Input Mixer (Ext), Ext Mix
Band
) must be set to include the frequencies of interest in the
segmented sweep table. If the mixer range is not the same, segmented
sweep will not turn on. If the mixer range is changed, segmented sweep
will be turned off.
Segmented sweep is not available when the following analyzer
functions are turned on: Demod, Signal ID, and Signal Track. In
addition, keys which access these functions are grayed out if segmented
sweep is on. This is also true for the following functions: Mkr
→
CF,
Mkr
→
CF Step, Mkr
→
CF Start, Mkr
→
CF Stop, Mkr
∆→
Span, Span
Zoom, Zone Span, and Zero Span.
Confining marker pairs (marker delta, delta pair, and span pair) to one
segment facilitates interpretation of marker readings. However, marker
pairs can provide useful information across segments. Amplitude
readings are straightforward because the y-axis is consistent over all
segments. Frequency or time readings require consideration of
differences in sweep time, number of , and span when interpreting
measurements across segments.
Marker delta functions differently depending upon the type of segment
in which it is activated. If you turn on marker delta in a segment set to
0 Hz span, it remains in that segment and provides amplitude and time
difference measurements. If you initiate a marker delta in a non-zero
span segment, it will function across segments and continue to display
frequency and amplitude information.
Delta pair and span pair function similarly to marker delta in
segmented sweep with some characteristics which need to be noted.
When a delta or span pair is initiated in segmented sweep, the analyzer
defaults to the frequency domain. If you wish to make time
measurements in a zero-span segment, the domain must be set to time
(
Marker, More, Readout, Time). The delta or span pair can traverse all
segments without regard to the type of segment in which they were
initiated.
NOTE Turn markers off (Marker, Off) when entering or exiting segmented
sweep (Segmented, Segmented (Off)).
Performing a factory preset will turn segmented sweep off. This is also
true if you select full span or last span.
Functions which are parameters of segmented sweep are not available
when accessed by pressing the following front-panel keys:
Auto Couple,
BW/Avg (Resolution BW and Video BW), Frequency (the entire softkey
menu),
Span (see above), and Sweep (Sweep Time and Points).
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