Table of Contents
Advertisement
[26]
SOURCE. Selects the triggering source:
CH1 (X-Y)
CH2
LINE
EXT
[24]
TRIG ALT. When the VERT MODE switch [39] is set in the DUAL or ADD state,
and the SOURCE switch [23] is selected at CH1 or CH2, with the engagement of
the TRIG.ALT switch, it will alternately select CH1 & CH2 for the internal
triggering source signal.
[25]
COUPLING. Select COUPLING mode between triggering source signal and
trigger circuit; select connection of TV sync trigger circuit.
[22]
SLOPE. Selects the triggering slope.
[30]
LEVEL. Selects the amplitude of the signal that makes the triggering occur when
in TRIGGER NORM. That is, the start point of the waveform. When turning it
clockwise (+), the triggering level moves upward on the display waveform. When
turning it anticlockwise (-), the triggering level moves downward on the display
waveform.
[29]
LOCK. 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. Used when the signal waveform is complex and stable triggering
[31]
cannot be attained with the LEVEL knob alone.
Page 14
Selects CH1 signal as the triggering source when VERT MODE
switch [39] is set to DUAL or ADD. When in the X-Y mode, select
CH1 for the X-axis signal.
Selects CH2 signal as the triggering source when VERT MODE
switch [39] is set to DUAL or ADD.
Selects a pulse from the AC line. This allows the oscilloscope to be
stabilised for the pulses of the signal of the AC line even if those are
very small in relation to other signal components.
Selects the signal applied through EXT terminal [23] as triggering
source. When in the X-Y, EXT HOR mode, the X-axis operates with
the external sweep signal.
AC:
AC coupling.
DC:
DC coupling
HF REJ:
Removes signal components above 50 kHz (-3 dB).
TV:
The trigger circuit is connected to the TV sync separator circuit
and the triggered sweeps synchronise with TV-V or TV-H signal
at a rate selected by the TIME/DIV switch [18]
TV-V: 0.5 s/DIV - 0.1 ms/DIV
TV-H: 50 µs/DIV - 0.1 µs/DIV
+
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.
OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL
November 2000
Advertisement
Table of Contents
