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Instructions

ManualsBrandsAim TTi ManualsLaboratory EquipmentAim TTi PSA3605USCSpectrum Analyser, Frequency Fange ,
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4.6 Using Measurement Markers
This menu group controls the markers that are used for measurement (as well as the traces
that appear on the screen).
There are two markers M1 and M2 which provide a readout of amplitude at any frequency point
on the trace. M2 can only be on if M1 is on, and the frequency difference between the two is
also shown. Markers can be set to automatically find peaks, or track the largest peak.
4.6.1 Setting-up Markers
controls the visibility of the markers, their function, and their measurement units.
Creates a set of bottom-row function keys as follows:
creates a pop-up menu that enables the markers, M1 and M2, the be turned on or
off. Note that M2 can only be on if M1 is also on.
creates a pop-up menu that enables the marker measurement units to be set.
Graticule Units provides logarithmic measurements in dBm or dBuV (as set within
the Level/Limits > Units/Graticule menu). uW (micro watts) or mV (millivolts)
changes the marker measurement to the appropriate linear scaling.
creates a pop-up menu with a choice of Scroll, Peak Find, or Peak Track modes. In
Scroll mode a single press of the Move Left/Right keys cause the selected marker to
move in one pixel steps (i.e. a frequency step of span/270), whilst holding a key
down auto-repeats in larger steps.
In Peak Find mode the Move Left/Right keys cause the selected marker to jump to the next
peak of the trace in that direction. In Peak Track mode, the marker will attempt to maintain its
position on the highest peak of the trace even when the peak frequency is changing (see
section 4.6.2.2 for a fuller explanation of Peak Find/Track modes).
The current mode of a marker is shown on the left hand side of the marker read out. Two
horizontal arrows indicate scroll mode whereas an upwards vertical arrow indicates peak-find
mode. An upward arrow followed by a small T indicates peak-track mode.
A frequency counter can be selected to operate at the active marker point causing a short
pause as the measurement takes place. This can be turned on or off from the Function key
pop-up. The counter resolution is set from Setup/Functions>Freq. Counter, see section 4.7.3.
fixes the amplitude reading of the M1 marker so that it no longer follows level
changes from the sweep. The marker readout is preceded with the word “Fix”.
Pressing it again, or pressing either marker “move” keys, restores normal operation.
moves the M2 marker to the frequency position of the M1 marker (also turns M2 on
if it was off). This is intended for use with the Fix M1 function to enable amplitude
changes at a specific frequency to be monitored.
Trace
Stores