GW Instek GSP-827 User Manual - Manual (Page 75)

2.7GHz Spectrum Analyzer Operation Manual
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74
8.3.2 Trigger
Trigger is the feature that the measurement starts when the trigger condition is met. In other
words, even in the trigger mode, the measurement sweep will not start until the trigger
condition is match. There are two trigger modes, Single and Continuous. As long as the
trigger condition is met, the Single mode only performs one measurement sweep while the
Continuous
mode performs the sweep continuously. Before the trigger condition is met, the
sweep will not work.
There are two sources of trigger condition, Video Level and External trigger from rear
panel. Video Level means the level of display. The input signal has to reach the video level
to trigger the measurement sweep. The default of trigger frequency is Center Frequency. It
can be changed with Trigger Freq setting.
Another source of trigger is from External Input on the rear panel. A 0 to 5V rising edge
will trigger the sweep in external trigger mode.
Trigger delay allows sweep happens later than the condition is match.
Activate Free Run to stop trigger function.
F1
F2
F3
F4
F5
F6
Center
Start
stop
Step
Free
Run
Exter
Singl
0
1 2 3
7
6 5 4
8 9
. -
Trigger
Video
Level
Trigger
Delay
Trigger
Freq