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Manual Up steps the sweep time back up.
The sweep time is shown in seconds followed by [N] for normal or F1/F2/F3 on a yellow
background if manual reduction has been set.
4.4.3 Sweep/BW > Sweep Control
Enables the sweep to be set to run continuously or in single sweep mode.
Repeat causes the sweep to run continuously unless it is stopped with
the Sweep Control key. Single causes single sweeps to be performed in
response to the Sweep Control key.
When option U02 is installed Sweep Triggering is available. The trigger event stops the sweep
when in Repeat mode, and starts the sweep when in Single mode.
Sweep Trigger creates a pop-up menu from which the trigger source can be
selected. Note that Limits triggering is only available in Repeat mode.
Single ReArm Only applies to Single sweep mode. When set to Auto, the trigger is
re-armed to accept new trigger events at the end of the sweep. When set to Manual,
the Sweep Control key must be pressed before another sweep can be triggered.
4.4.4 Sweep Control Key
This key is placed directly below the graticule on the right hand side of the screen.
Its action is duplicated by the hard key marked ‘Run/Stop’.
The function of the key is to start and stop the sweep when in Repeat mode, and to
initiate the sweep when in Single mode. The colour and marking of the key changes to show
the current status of the sweep.
4.4.5 Sweep Progress Bar
When the sweep time is greater than about 1 second, the sweep is drawn progressively across
the screen. In this mode a yellow sweep progress line is shown at the bottom of the graticule.
4.4.6 Sweep/BW > Sweep Mode
This menu controls the sweep methods used to suppress signal images and other
spurii. Combined analog and digital techniques are used to achieve image
suppression, and the user can choose between methods that may offer improved
performance for specific situations.
Normal (Auto) is the default mode in which images are suppressed in real time. An
alignment procedure is used which can briefly interrupt the sweep. This can be
avoided using settings within Advanced Options.
Manual Align is available if Normal (Manual) has been selected in Advanced
Options.
Reveal Images disables image rejection for one sweep or 1.5 seconds, whichever is
the longer. During this period any signal images close to or within the noise are
revealed at full level.
Advanced Options opens a further menu from which alternative image rejection
sweep modes can be selected. This menu has its own context-sensitive Help.
Normal Sweep Mode rejects the images of a signal in real time as the sweep progresses. To
ensure sufficient rejection to bring the image down to the noise floor, an alignment procedure is
run when the instrument is first switched on and occasionally thereafter as temperature and
other parameters change over time.
Normal (Auto) is the default mode in which the sweep pauses briefly when alignment is needed.
Sweep
Control
Repeat
Single
Sweep
Trigger
Single
ReArm
Running
(Stop)
Manual
Up
Sweep
Mode
Normal
(Auto)
Manual
Align
Reveal
Images
Advanced
Options