Anritsu Spectrum Master MS2720T, User Manual

Page: 455 / 1035

3-17 Sweep Menu Interference Analyzer (Option 25)
3-76 PN: 10580-00349 Rev. H Spectrum Analyzer MG
Triggering Menu
Key Sequence:
Shift > Sweep
(
3
) key
> Triggering
This menu is available only in Zero Span.
Source: Displays the “Trigger Source Menu” on page 3-77 .
Delay XX %: Used when External or Video is selected in the Trigger
Source menu. Measurement begins after set time delay once the trigger
has occurred.
Use the numeric keypad, rotary knob, or arrow keys to change the delay
value. When using the numeric keypad, the Units menu is displayed.
Press the appropriate key to enter the trigger delay value as a percentage
of the sweep time or a fixed value in units of ns,
μ
s or ms.
A negative delay displays the trigger position on screen, while a positive
value places the trigger point off the screen to the left.
Level: Sets a trigger level to initiate a measurement when Video or IF
Power is selected in the “Trigger Source Menu” on page 3-77 . Press this
key, then use the rotary knob, arrow keys, or numeric keypad to enter the
trigger power level. The value ranges from –150 dBm to +30 dBm.
Slope: Sets the trigger slope to rising or falling.
Hysteresis: When used, value unit is in dB. Hysteresis can be used with
Level and Slope when setting a measurement trigger. Hysteresis is used
to prevent undesired triggering when the signal is hovering near the
trigger value. For example, the Level is set to 10 dBm, the Slope is set to
Rising, and Hysteresis is 1 dB. The first trigger occurs when the signal at
least reaches the 10 dBm level. To trigger again, the signal must drop
below 9 dBm before returning to 10 dBm. For another example, with Level
set to 10 dBm and slope set to Falling, and Hysteresis set to 1 dB, the
opposite must occur to activate a trigger. The signal amplitude falls and a
trigger occurs when the signal reaches the 10 dBm level. The signal must
then reach at least 11 dBm before falling to 10 dBm and initiating a trigger.
Holdoff: Delays the next trigger to the time set regardless of triggers
occurring within the set time.
Force Trigger Once: Forces a sweep regardless of meeting any trigger
criteria.
Back: Returns to the “Sweep Menu” on page 3-74 .
Figure 3-70. IA Triggering Menu
Triggering
Delay
-1.0 %
Hysteresis
1.0 dB
Holdoff
0 ns
Force Trigger Once
Level
10.0 dBm
Slope
Rising Falling
Back
Source
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