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Instructions

ManualsBrandsAim TTi ManualsLaboratory EquipmentAim TTi PSA3605USCSpectrum Analyser, Frequency Fange ,
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enables the sweep time to be reduced in order to speed up the response
to changing events. Three levels of speed up are available indiciated by
[F1], [F2], [F3] replacing the [N] after the sweep time display. To warn
the user of reduced level measurement accuracy, a yellow background is applied. The
maximum levels of sweep time reduction are 2, 5 or 10 but the actual reductions are dependent
upon span and RBW/VBW settings – see section 7.5.4.
For sweep times longer than about 1 second, a yellow indicator line below the graticule
indicates the progress of the sweep – see section 4.5.2.
4.3.3 Sweep Control
controls how and when the sweep runs. Creates a set of bottom-row function keys
as follows:
causes the sweep to be automatically restarted after the completion of the previous
sweep unless halted by the Sweep Control key (or the Sweep Trigger settings).
enables single sweeps that are commenced by the Sweep Control key (or the
Sweep Trigger settings).
Note that, whenever the sweep is stopped, whether in repeat or single mode, changing the
frequency span or the reference level will re-run the sweep once.
Sweep Trigger is only available with the upgrade option U02 is fitted. It provides a
choice of how the sweep is started or stopped. The trigger source can be manual,
external, or internal from limit lines or patterns. See section 4.3.4.2 for an
explanation of trigger functions.
provides a choice of automatic or manual re-arming of the trigger when triggering is
enabled and the sweep mode is set to Single.
When the menu system is set to Sweep/BW the sweep status is displayed in the lower
annotation area directly above the keys.
4.3.4 Scan Mode (when fitted)
when Option U02 is fitted, this key in the Sweep Control menu selects an entirely
different mode of operation. Scan Mode operation is explained in section 8.1.
4.3.4.1 Manually Controlling the Sweep
The sweep can be started or stopped using the touch screen Sweep Control key
directly under the graticule on the right hand side. This key changes colour to
indicate the current state of the sweep. The action of the key is duplicated by the
hard key marked Run/Stop.
When the sweep is running, the key is green and is marked Running (Stop). The word in
brackets indicates the action that will be performed by pressing the key.
When the sweep is stopped, and the sweep mode is Repeat, the key is blue and is
marked Stopped (Run). Stopping the sweep freezes the current sweep trace on the
display so that it can be observed.
When the sweep is stopped, and the sweep mode is Single, the key is blue and is
marked Stopped (Single).
At other times, when the sweep is temporarily halted by the system, the key
becomes red and is marked Paused. When sweep triggering is enabled (see next section) the
key can provide triggering and arming functions which are indicated by other colours and
markings.
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