Hitachi V-355 Operation Manual page 14

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 C H2 appears on the
screen.
@
CH I OUTPUT connector
Output connector providing a sample of the signal
applie d to the C H I connector.
@ @ oc
adj ustment controls
BAL
These are used for the attenuator balance adjustmen t .
See 8 . ADJUSTMENTS
(3) Controls of Horizontal deflection system
@
TIME/DIV select switch
Sweep time ranges are available in
µs/div to 0.2s/div.
. . . for the details.
9
steps from 0.2
I
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
n ec ted 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 b and-width of 5 00 kHz.
@
SWP V ARiable control
This control works as CAL and the sweep time is cali­
brated to the value indicated by TIME/D l V .
TIME/DIV of sweep can be varied continuously when
shaft is out of C AL p osition .
Then the control i s rotated i n the direction of arrow t o
the full, the C A L state i s produced and the swe ep time
is calibrated to the value indicated by TIME/DIV.
C ounterclockwise rotation to the full delays the sweep
by 2 .5 time s 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 me asurement of the time
of waveform .
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