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Preparation for Use-2215A Operators
VERTICAL
Refer to
Figure 2-4 for location
of
items
9
through 17.
9
CH 1
VOLTS/DIV
and
CH
2
VOLTS/DIV
Switches-
Used
to
select the vertical deflection factor
in a
1-2-5
sequence.
To obtain
a
calibrated deflection
factor,
the
VOLTS/DIV variable control must be in the calibrated
(CAL)
detent (fully clockwise).
1X-lndicates
the deflection factor selected when us-
ing
either a 1 X probe or a
coaxial
cable.
10X
PROBE-Indicates the
deflection factor selected
when
using
a 1 OX probe.
10
VOLTS/DIV Variable
Controls-When
rotated
coun-
terclockwise
out of their calibrated detent
positions,
these
controls
provide
continuously
variable,
uncalibrated deflection factors between the calibrated
settings of the VOLTS/DIV switches.
11
POSITION
Controls-Used to vertically position the
display on the crt. When the SEC/DIV switch
is
set to
X-Y, the Channel 2 POSITION
control
moves
the dis-
play vertically (Y-axis), and the Horizontal POSITION
control moves the display
horizontally
(X-axis).
30MHz
OSOLLOSCOPE
4732-04
Figure
2-4.
Vertical
controls and connectors.
2-4
12
Input
Coupling (AC-GND-DC)
Switches-
Three-po-
sition switches that
select
the method of
coupling
the
input
signals to
the
instrument
deflection system.
AC-Input
signal
is capacitively
coupled
to
the ver-
tical amplifier. The
de
component
of the input
sig-
nal
is
blocked.
Low-frequency
limit
(-
3 dB point) is
approximately 1 0 Hz.
GND-
The
input of
the vertical
amplifier is
grounded to provide a zero (ground) reference-volt-
age display (does
not
ground the input
signal). This
switch position allows precharging
the
input
cou-
pling
capacitor.
DC-All frequency components
of the input signal
are coupled to the
vertical deflection
systems.
13
CH 1 OR
X
and
CH
2
OR
Y
Input
Connectors-
Provide
for application of external signals
to the verti-
cal deflection system or for an X-Y
display.
In the X-Y
mode
(SEC/DIV
switch set to X-Y),
the signal
con-
nected
to
the CH 1 OR X input connector
provides
horizontal deflection
(X-axis)
and the signal connected
to the CH 2 OR Y input connector provides
vertical
deflection
(Y-axis).
14
VERTICAL MODE
Switches-
Two three-position
switches and one button
switch
are used
to select
the
mode of operation for the
vertical amplifier system.
CH
1-Selects only the Channel 1 input
signal
for
display.
BOTH-Selects both Channel 1 and
Channel
2 in-
put signals for display.
The
CH 1-BOTH-CH 2
switch must be in the BOTH position for either
ADD,
ALT,
or CHOP
operation.
CH
2-Selects
only the Channel
2 input signal for
display.
ADD-Displays
the algebraic
sum of the
Channel 1
and Channel 2
input signals.
ALT-Alternately displays Channel
1
and Channel
2
input
signals.
The alternation
occurs during re-
trace at the
end of
each
sweep. This
mode
is
useful
for
viewing both
input signals at sweep speeds
from 0.05
µs
per division to 0.2
ms
per division.
CHOP-
The display switches
between
the Chan-
nel 1
and
Channel 2 input
signals during
the
sweep. The switching rate
is
approximately
500
kHz.
This mode
is
useful for viewing both
Channel
1
and Channel 2 input signals at
sweep
speeds from 0.5 ms per division
to
0.5
µs
per
division.
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