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Measurement Status The 37xxxE displays measurement-status messages (in red when
appropriate) in the upper-right corner of the graticule (channel) to
which they apply.
Sweep Indicator Marker A blue sweep-indicator marker appears at the bottom of each dis
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played graph-type. It indicates the progress of the current sweep.
When measuring quiet data—that is, data having few or no perturba
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tions—this indicator assures that the instrument is indeed sweeping.
Its position is proportional to the number of data points measured in
the current sweep. If the sweep should stop for any reason, the posi
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tion of the indicator will stop changing until the sweep resumes.
6-6 DATA DISPLAY
CONTROL
The following figure shows the algorithm that the 37xxxE uses to
display the active channel.
37xxxE OM 6-13
DATA DISPLAYS DATA DISPLAY CONTROL
Y E S
N O
Y E S
Y E S
N O N O
D U A L
C H A N N E L
D I S P L A Y E D
1 - 3 ?
C H A N G E T O D U A L 1 - 3
+ C H A N G E T O
A C T I V E C H A N N E L
C H A N G E T O D U A L 2 - 4
+ C H A N G E T O
A C T I V E C H A N N E L
S E L E C T A C T I V E C H A N N E L
( P R E S S C H 1 , C H 2 , C H 3 , C H 4 )
C H A N N E L
P R E S E N T L Y
D I S P L A Y E D
?
C O N T I N U E
D I S P L A Y IN G A C T IV E C H A N N E L
( S IN G L E , D U A L , O R F O U R - C H A N N E L
D I S P L A Y )
C H A N G E T O
A C T I V E C H A N N E L
S IN G L E
C H A N N E L
D I S P L A Y E D
?
Figure 6-13. Active Channel Algorithm