Manualshelf

Instructions

ManualsBrandsAim TTi ManualsLaboratory EquipmentAim TTi PSA3605USCSpectrum Analyser, Frequency Fange ,
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4.3.4.2 Triggered Sweep (when fitted)
When upgrade option U02 is fitted, it is possible to trigger the sweep using an external or
internal trigger signal. Triggered sweep has a different action dependent upon the sweep mode
(Single or Repeat).
If the sweep mode is set to Single, the effect of the trigger is to start the sweep. When a trigger
event occurs a single sweep will be initiated. The trigger options are None, Ext +ve (trigger
from a positive going edge on the external trigger input) or Ext -ve.
If Single ReArm is set to Auto, a sweep will be initiated every time a trigger event occurs. If
Single ReArm is set to Manual, further trigger inputs are ignored after the first sweep. The
Sweep Control key turns yellow and is labelled Stopped (Arm). Pressing the key changes the
labelling to Run on Trigger, and a further sweep will be initiated when a trigger event occurs.
If the sweep mode is set to Repeat, the effect of the trigger is to stop the sweep. The options
are Free Run (no triggering), Ext +ve (trigger from a positive going edge on the external trigger
input), Ext -ve, and Limits (trigger from the Limits comparator - see section 7.10.2). The key
marking becomes Stop on Trigger.
When a trigger occurs the current sweep will be completed after which the sweep control key
will become blue and the sweep will remain stopped until it is restarted with the sweep control
key. There is no separate Arming function for repeat mode sweeps.
Sweep triggering is turned off whenever the sweep mode is changed between Single and
Repeat or vice versa.
Note that, when a Logging file is initiated, triggered sweep is automatically cancelled and set to
Repeat mode and Free Run.
4.3.5 Sweep Mode
sets the sweep method used to reject signal images and minimise spurii. For a full
explanation see section 7.5.
selects the default mode whereby image rejection occurs automatically in real time.
Occasional interruptions of the sweep will take place as an alignment is run to
optimise the image rejection ratio.
only becomes operational when the mode has been set to Normal (Manual) in
Advanced Options. Initiates an alignment procedure to optimise the image rejection
ratio.
turns off image rejection for a period of 1.5 seconds or one sweep, whichever is the
longer, thus enabling signal images to be seen.
creates a new sub menu from which additional sweep mode options can be
selected. See section 7.5.2.
4.3.6 Detector Type
enables the type of signal detector to be changed. Creates a set of bottom-row
function keys as follows:
by default the analyzer uses a Positive Peak detector. This gives appropriate results
in the majority of situations.
creates a pop-up menu that enables alternatives to positive peak to be selected.
These are Negative Peak, Sample, Linear or Log Average, Alternate Peak or RMS.
See section 7.7 for a brief explanation of detector types.