HP 54522A - Page 102

Figure 5-13
Trigger
TV Trigger Mode
TV Trigger Mode
The TV trigger mode enables the oscilloscope to trigger on clamped TV
signals. The two most common TV standards are NTSC and PAL, NTSC
(60 Hz/525 lines) is the standard used in the United States, and PAL
(50 Hz/625 lines) is the standard used in most European countries. This
trigger menu also allows for user defined triggering on TV signals that are
used in other parts of the world.
Press the softkey to move the highlighted inverse video window, and use the
entry knob to change the value displayed in the window.
Standard/Source Softkey
The standard/source softkey is not labeled, but it is the third softkey
from the top. The upper portion of the softkey allows you to choose between
the NTSC standard TV signal used in the United States (60 Hz/525 lines, or
the PAL standard used in most European countries (50 Hz/625 lines). The
third option is for user-defined ranges of the TV signal. User-defined ranges
are used to trigger on any of the proposed HDTV standards. The lower
portion of the softkey allows you to select the trigger source.
T¥_TRIGGER
trig’d
edge patt state
source 1
fea © c0000
Vv
polarity it
o field
\_—m 2
7 line
- holdo
time CERES