Specifications

CH 1-Displays Channel
1 signals
when
push
button is
pressed
in.
A
TRIG VIEW-Displays
the
A
external
trigger
input signal
when
push
button
is
pressed
in and
when the A
TRIGGER SOURCE switch
is s'et
to
EXTor EXT/I0.
ADD-Displays
the algebraic
sum
of the Channel
1
and
Channel 2
input signals
when
ADD
push
button
is
pressed
in. The
INVERT switch
in
Channel
2 allows
the display
to
be either CH
1
plus
CH2
or
CH
1
minus
CH
2. TheADD
capability
is
useful
for
common-mode
reiection to
remove an
undesired signal
or
dc offset.
CHOP
ALT: OUT-The
4658
"chops"
(switches)
between
two or
more
of the
display
modes
at
a
500-kHz
rate
when
CHOP
ALT: OUT
button
is
pressed
in. When
released, the
4658
"alternates"
between two
or
more
of
the
four display
modes
at
the
end of
each
trace
sweep.
CHOP and
ALT
functions are disabled
if only one
VERT
MODE
push
button
(CU
1, CH
2, ADD,
or A TRIG
VIEW)
is
selected
or if the
X-Y
mode is
selected.
CH 2-Displays
Channel
2 signals
when
push
button
is
pressed
in.
20
MHz
BW LIMIT
(FULL
BW OUT) Switch-Limits
the bandwidth of the
vertical
amplifier
to approx-
imately 20 MHz
when
pressed
in.
Push
button
must
be
depressed and
released
a second time to
regain
full
1 00-MHz
bandwidth operation.
20
MHz BW LIMIT lndicator-This LED
is illumi-
nated whenever the 20 MHz BW LIMIT
push
button
is
pressed
in, and bandwidth is limited to
20
MHz.
INVERT-lnverts
Channel 2 display when
push
button
is
pressed
in. Push
button
must
be depressed
and
released
a second time to
present
a
noninverted
display.
DISPLAY AND CALIBRATOR
Refer
to
Figure
3
for location
of
items 12 through 26.
lnternal
Graticule-Eliminates
parallax.
Risetime and
amplitude
measurement
points
are
indicated at the
left
edge
of the
graticule.
BEAM
FINDER
Switch-Compresses
the
display to
within the
graticule
area and
provides
a
visible
view-
ing
intensity
to aid
in locating off-screen
displays.
4658/DM44
Operators
@