10
(16) CH 1 POSITION:
This potentiometer is used to adjust the
position of the channel 1 trace upwards or
downwards
(17) CH 2 POSITION:
Position adjustment for channel 2
(17a) PULL CH 2 INV:
If (17a) is pulled out, channel 2 is inverted,
i.e. rotated through 180º
(18) V mode:
Used to modify the display mode.
Position CH1 means that only channel 1 is
displayed on the screen.
Position CH2 means that only channel 2 is
displayed on the screen.
The DUAL position means that both
channels are displayed alternately.
CHOP for the range from 0.2 s/div to approx.
5 ms/div in the case of the OS-3020 D and
OS-3060 D.
ALT for the range from approx. 2 ms/div to
approx. 0.2 µs/div (OS-3060 D: 0.1 µs/div).
The ADD position means that both channels
are algebraically summed (CH1+CH2).
(19) CH 1 OUTPUT:
This BNC socket is located at the rear of the
unit: the attenuated signal from channel 1 is
available here for further analysis.
2.1.3 Sweep and trigger section
(20) HORIZONTAL DISPLAY:
Used to set the type of sweep: A, B, B trig D
etc.
A: Trace is displayed with no delay.
A int:Trace is displayed with no delay. A por-
tion of the trace (signal) is shown "ampli-
fied" by time base B. The position of this
portion on the screen can be altered by
means of the "Delay Time Pos control"
knob.
B: The trace is displayed depending on the
setting of the B Time/Div switch (speed), the
A Time/Div switch (time delay) and the Delay
Time Pos pot (knob).
B TRIG'D: The time-delayed trace is trig-
gered by the "first" trigger pulse.
OS-3060 D X-Y: pressing this button takes
you into X-Y mode.
(21) TIME/DIV A:
Used to set the time-base sweep (horizontal
deflection) from 0.2 s to 0.2 µs/div in the
case of the OS-3020 D in 19 calibrated steps;
turning the switch to the right as far as the
stop is equivalent to X-Y mode.
(21) TIME/DIV A:
Used to adjust the time-base sweep from
0.2 s to 0.1 µs/div on the OS-3060 D
(22) TIME/DIV B:
Used to adjust the time-base sweep of the
"delayed" B time base
(23) DLY'D POSITION
This knob is used to determine the point at
which deflection of the non-delayed trace
starts.
= Horizontal adjustment of the delayed
signal portion.
(24) VARIABLE:
Infinitely-variable fine adjustment of the
time-base sweep between the latched-in
positions of switch (22).
(24a) PULL X 10 MAG:
Sweep expansion by a factor of up to 10
(not calibrated). To calibrate, turn the pot to
the right as far as the stop until it latches in.
(25) POSITION <=>:
Used to change the trace position from right
to left and vice versa
(26) TRIGGER MODE:
Used to set the triggering mode:
AUTO position
In this position, automatic triggering is
active, a trace is always visible on the screen
even when there is no input signal.
Triggering takes place automatically beyond
a frequency of approximately 25 Hz.
NORM position
Manual triggering mode must be selected
(pressed) if the incoming signal has a fre-
quency of 25 Hz or less. If no signal is
present, no trace is visible.
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