GW Instek GOS-652G - Manual (Page 18)

⎯ 13 ⎯
LINE : To select the AC power line frequency signal as the triggering signal.
EXT : The external signal applied through EXT TRIG(EXT HOR) input terminal(23) is used for
the external triggering source signal. When in the X-Y, EXT HOR mode, the X-axis operates with
the external sweep signal
COUPLING.............(25)
Select COUPLING mode(25) between triggering source signal and trigger circuit; select connection of TV sync trigger circuit.
AC : AC coupling
DC : DC coupling
HF REJ : Removes signal components above 50kHz(-3dB).
TV : The trigger circuit is connected to the TV sync separator circuit and the triggered sweeps synchronize with
TV-V or TV-H signal at a rate selected by the TIME/DIV switch(18)
TV-V: 0.5 s/DIV - 0.1ms/DIV
TV-H: 50
µs/DIV - 0.1µs/DIV
SLOPE.....................(22)
Select the triggering slope.
“ + ” : Triggering occurs when the triggering signal crosses the triggering level in positive-going direction.
“ − ” : Triggering occurs when the triggering signal crosses the triggering level in negative-going direction.
LEVEL.....................(30)
To display a synchronized stationary waveform and set a start point for the waveform.
Toward “
+ ” : The triggering level moves upward on the display waveform.
Toward “ − ” : The triggering level moves downward on the display waveform.
LOCK(29) : Triggering level is automatically maintained at optimum value irrespective of the signal amplitude (from
very small to large amplitudes), requiring no manual adjustment of triggering level.
HOLD OFF........…(31)
Used when the signal waveform is complex and stable triggering cannot be attained with the LEVEL knob alone.