GW Instek GRS-6000A Series - Manual (Page 28)

GRS-6052A/6032A OSCILLOSCOPE
USER MANUAL
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50
Triggering of Video signal
In the work concerned with TV, complex signals and containing video signal,
blanking pedestal signal, and synchronizing signal are often measured.
Press the TV pushbutton to set the TV position. The built-in active TV-Sync-
separator provides the separation of frame or line sync pulses from the video signal.
To trigger the oscilloscope at the vertical (frame) rate, press the TV pushbutton to set
TV-V and TV-H triggering. The figure 5-14(a) shows vertical signal of TV-V and
Figure 5-14(b) shows horizontal signal of TV-H.
Figure 5-14(a) TV-V Figure 5-14(b) TV-H
The figure 5-15 shows the examples of TV polarity synchronization signals.
Note: This oscilloscope synchronizes with only ( ) synchronizing signal.
REFERENCE:
Figure 5-15 TV Signal
GRS-6052A/6032A OSCILLOSCOPE
USER MANUAL
⎯ ⎯
51
5-6. Digital Storage Functions
The operation procedure of the digital storage functions is described below.
Normal Sampling mode (SMPL)
1) Display the waveform to be stored in the REAL TIME mode.
2) Press the STORAGE pushbutton switch and the RUN LED is on.
3) In this mode, a waveform is swept every trigger according to the setting
state of controls on the front panel, the waveform to be stored is displayed
on the CRT as it is. The slower the sweep rate, the longer the time is
required for the acquisition and display of the waveform. It takes
approximately 3 seconds until a waveform is acquired at the sweep range
of 0.1s/DIV. The trigger signal is generated thereafter. Therefore, when
the sweep rate is slow, the waveform is not displayed on the CRT
immediately after the controls on the front panel have been adjusted.
4) When the TIME/DIV control is from 1μs/DIV to 0.1s/DIV, both the
single and the repetitive waveforms can be stored.
Equivalent Sampling Mode (EQU)
When the TIME/DIV control knob is set to 0.2μs/DIV to 0.5μs/DIV (2 steps),
only the repetitive waveform can be stored in the equivalent sampling mode.
The first (left end) rising and falling edges of the traces may not be displayed
in the repeat mode range. In this case, measure the rising or falling edge on the
second or later cycles of the waveform.
It takes 5 seconds or more to store the input signal of 1kHz or lower. When the
low frequency signal is stored, noise can be mixed. It is recommended to use a
sine wave of 1MHz or higher or a square wave with the rise time which is
faster than 0.3μs.