Agilent Technologies 42A ユーザーズマニュアル
3- 40
Triggering the Oscilloscope
To use TV triggering
To use TV triggering
TV triggering is used to capture the complicated waveforms of television (TV)
equipment. The trigger circuitry detects the vertical and horizontal interval of
the waveform and produces triggers based on the TV trigger settings you have
selected.
equipment. The trigger circuitry detects the vertical and horizontal interval of
the waveform and produces triggers based on the TV trigger settings you have
selected.
The
oscilloscope’s MegaZoom technology gives you bright, easily viewed
displays of any part of the video waveform. Analysis of video waveforms is
simplified by the oscilloscope’s ability to trigger on any selected line of the video
signal
simplified by the oscilloscope’s ability to trigger on any selected line of the video
signal
1 Press the
More
key in the Trigger section of the front panel, rotate the
Entry knob until
TV
is displayed in the
Trigger
softkey, then press the
Settings
softkey to display TV trigger menu.
2 Press the
Source
softkey and select any analog channel as the TV trigger
source.
The selected trigger source is displayed in the upper-right corner of the display.
Turning the Trigger
Turning the Trigger
Level knob does not change the trigger level because the
trigger level is automatically set to the sync pulse. Trigger coupling is
automatically set to
automatically set to
TV in the Trigger Mode/Coupling menu.
Source
channel
channel
Sync
polarity
polarity
TV Standard
Line #
TV Mode
Selected
channel
channel
TV
trigger
trigger
Return to
previous menu
previous menu
TV mode