Hitachi V-355, Operation Manual

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ALT Signals applied respectively to CH I and CH2
appears on the screen alternatively at each sweep.
This setting is used when the sweep time is short in
2-channel observation .
CHOP At this setting the input signal� applied to CH I
and CH2 are switched at about 250 kHz indepen­
dent of the sweep and at the same time appear on
the screen. This setting is used when the sweep
time is long in 2-channel observation.
ADD The algebraic sum of the input signals applied
respectively to CH I and CH2 appears on the
screen.
@
CHI OUTPUT connector
Output connector providing a sample of the signal
applied to the CHI connector.
@@oc
adj ustment controls
BAL
These are used for the attenuator balance adjustment .
See 8 . ADJUSTMENTS . . . for the details.
(3) Controls of Horizontal deflection system
@
TIME/DIV select switch
Sweep time ranges are available in
I 9
steps from 0.2
µs/div to 0.2s/div.
X-Y This position is use d when using the instrument as
an X-Y oscilloscope.
In this position the X (horizontal) signal is con­
nected to the input of CH I ; the Y (vertical)
signal is applied to the input of CH2 and has a
deflection range from less than one millivolt to
5 volts/div at a reduced band-width of 500 kHz.
@
SWP V ARiable control
This control works as CAL and the sweep time is cali­
brated to the value indicated by TIME/DlV.
TIME/DIV of sweep can be varied continuously when
shaft is out of CAL position.
Then the control is rotated in the direction of arrow to
the full, the CAL state is produced and the sweep time
is calibrated to the value indicated by TIME/DIV.
Counterclockwise rotation to the full delays the sweep
by 2 .5 times or more.
QP
Sweep UNCAL lamp
Light when SWP VAR is out of CAL detent position.
@)
POSITION
control
PULLxlOMAG
This knob is used to move the display in horizontal direc­
tions. It is indispensable in the measurement of the time
of waveform .
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