GW Instek GOS-6200 - Manual (Page 17)

GOS-6200 OSCILLOSCOPE
USER MANUAL
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(31)TV-V/TV-H/TV-STD—Pushbutton for video sync signal selection.
In the TV trigger mode, each time when the pushbutton of TV-V/TV-
H/TV-STD is pressed, the video sync signal is displayed in the
sequence as follows:
TV-V—TV-H—TV-L(NTSC)—TV-L(PAL)—TV-L(SECAM)—TV-V
TV-V
Start the main trace at the beginning of a video signal field. SLOPE
polarity must match the composite sync polarity (i.e, “ ” for
negative sync) to obtain TV field triggering on the vertical sync
pulse.
TV-H
Start the main trace at the beginning of a video signal line. SLOPE
polarity must match the composite sync polarity to obtain TV line
triggering on the horizontal sync pulse.
The current setting is displayed in the readout under item “source,
video polarity, TV-H”.
TV-STD
Start the main trace at the beginning of a video signal line. SLOPE
polarity must match the composite sync polarity to obtain TV line
triggering on the horizontal sync pulse.
The current setting is displayed in the readout “SYSTEM, field, line
number”.
GOS-6200 OSCILLOSCOPE
USER MANUAL
⎯ 29 ⎯
(32)SLOPE ( )/TV SYNC POLA( )—Pushbutton for
the triggering slope or video polarity selection.
If in the AUTO or NML trigger mode, briefly pressing the pushbutton
to select the slope of the signal which is used for triggering the time
base generator. Each time when the pushbutton is briefly pressed, the
slope direction will switch from falling edge to rising edge, and vice
versa.
The current setting is displayed in the readout under item “source,
SLOPE, coupling”.
If in the TV trigger mode, briefly pressing the pushbutton to select the
video polarity, which will be displayed in the readout with a “ ”
symbol of positive video signal and a “ ” symbol of negative
video signal.
Measurement and Panel setting Control
The measurement section controls the on-screen readout and the cursor
measurements. For more information, please refer to page 9 “PANEL
INTRODUCTION” section for the instrument to store and recall the
panel setting.