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LINE.
Switch
turns
instrument
power
on
and off.
LINE
INDICATOR.
Indicator
lights
when
the instrument power is on.
BEAM
FIND. Pressing this pushbutton in-
creases the intensity and compresses the
display within the viewing area.
© BEAM INTENSITY. Controls the brightness
of the CRT display.
6 FOCUS. Adjusts the writing beam for the
o 6 6 @
sharpest
trace.
Always
keep this display
focused
to prevent damaging
the CRT
in-
ternally.
:
SCALE ILLUM. Adjust the CRT background
illumination
for good contrast between the
background and the graticule.
ALT. Channel A and B signals are displayed
alternately on consecutive sweeps.
Channel A. Displays the channel A input
signal.
Channel
B. Displays the channel
B input
signal.
A+B. Pressing both channel A @ and chan-
nel B @ displays the algebraic sum of the
channel A and channel B input signals. If
the channel
B display is inverted
(press
CH B INVT @), an A minus B display
results.
CHOP.
Channel
A and B signals are dis-
played
simultaneously
by switching
bet-
ween channels at a 250-kHz rate.
TRIG VIEW. Displays the selected internal
or external trigger signal at a fixed sensi-
tivity
of approximately
100
mV/div
or
1 V/div with EXT
= 10@. TRIGGER
LEVEL @ positions the display vertically.
Center screen
indicates the trigger thres-
hold level with respect to the trigger signal.
If ALT @ or CHOP @ is selected, three
signals are displayed: channel A, the sel-
ected trigger signal (at center screen), and
channel B.
MAG
X5. Magnifies the vertical presenta-
tion
five times,
and
increases
the maxi-
mum
sensitivity
to 1 mV/div.
The band-
width is decreased to 40 MHz.
© «oO
BW
LIMIT.
Reduces
the
bandwidth
of
channel A and channel B to approximately
20 MHz.
CH
B INVT.
Inverts
the polarity
of the
channel
B signal.
In A+B O«
3} mode,
pressing CH
B INVT @ results in an A
minus B display.
TRIGGER A. Selects a sample of the chan-
nel A signal as the trigger signal when
INT/EXT @ is in INT.
TRIGGER B. When in INT, a sample of the
channel
B signal
is selected
as the trig-
ger signal.
COMP.
When
the display
mode
is set to
channel
A, channel
B, ALT,
or A+B, the
sweep is triggered by the displayed signal.
When in CHOP, the sweep is triggered by
the channel A signal only.
AC. Selects the input coupling and imped-
ance for the vertical amplifiers. In the AC
position
the de component
of the input
signal
is blocked.
The
lower
3-dB
limit
is approximately 10 Hz.
GND.
The
input
signa:
is disconnected
from the amplifier, and the amplifier input
is grounded.
DC. All elements of the input signal are
passed to the vertical amplifier. The input
impedance
is approximately
1 megohm
shunted by 20 pF.
500. The input signal is dc coupled, and the
input
impedance
is 500.
Pull
the lever
forward and down to select this position.
Do not apply
more
than
5 V rms
to the
input connector.
VOLTS/DIV.
Selects the vertical deflection
factor in a 1, 2, 5 sequence from 0.005 V/
div to 20 V/div,
accurate
within
3% with
vernier
@ in the CAL position.
Vernier. Provides continuous control of the
deflection
factor
between
calibrated
VOLTS/DIV
ranges.
Vernier
range
is at
least 2.5 to 1.
UNCAL.
Lights
when
the vernier
control
is
out
of
detent
position
to
indicate
VOLTS/DIV is uncalibrated.
25 a 25)
CO!
gr
car
nal
GE
Re:
CIN
of
trig
the
dis
sele
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