Operating Instructions— 2236 Service
settings of the VOLTS/DIV switches. In CH 1 V mode,
the CH 1 VOLTS/DIV Variable control has no influ
ence on the Channel 1 volts measurements.
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).
( l 2 ) CH 1 OR X & DMM and CH 2 OR Y Input Connec
tors— Provide for application of external signals to the
instrument deflection system for display on the crt and
to the Multimeter (CH 1 OR X & DMM input connector
only. In normal deflection mode (SEC/DIV switch not
set to X-Y), signals from both connectors provide ver
tical deflection on the crt. In the X-Y mode (SEC/DIV
switch set to X-Y), the signal connected 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).
Input Coupling (AC/AC RMSV-GND-DC/DCV and
AC-GND-DC) Switches— Three-position switches
that select the method of coupling the input signals to
the instrument deflection system. When in CH 1 V
CTM mode the Channel 1 Input Coupling switch se
lects the type of voltage measurement the Multimeter
will perform on the Channel 1 input signal (AC RMSV
or DCV).
AC— Input signal is capacitively coupled to the ver
tical amplifier. The dc component of the input sig
nal is blocked. Low-frequency limit (-3 dB point) is
approximately 10 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.
(
m
) VERTICAL MODE Switches—Two three-position
switches and two button switches 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 BOTH position must be
selected 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 us 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 s per
division.
TRIG VIEW— Press in and hold this button to dis
play a sample of the signal present in the A Trigger
amplifier (for all A SOURCE switch settings). All
other signal displays are removed while the TRIG
VIEW button is held in.
BW LIMIT— When pressed in, this button switch
limits the bandwidth of the vertical amplifier and the
A Trigger system to approximately 20 MHz. Button
must be pressed a second time to release it and
regain full 100-MHz bandwidth operation. Provides
a method for reducing interference from high-
frequency signals when viewing low-frequency
signals.
U 5 j INVERT Switch— Inverts the Channel 2 display when
X
button is pressed in. Button must be pressed in a sec
ond time to release it and regain a noninverted
display.
( j j i ) GND Connector— Provides direct connection to the
instrument chassis ground.
( l ? ) SERIAL and Mod Slots—The SERIAL slot is im
printed with the instrument's serial number. The Mod
slot contains the option number that is installed in the
instrument.
HORIZONTAL
Refer to Figure 2-5 for location of items 18 through 24.
M 8 ) A and B SEC/DIV Switches— Used to select the
sweep speeds for the A and B Sweep generators in a
2-4
Содержание 2236
Страница 10: ...2236 Service viii The 2236 Oscilloscope ...
Страница 28: ...Specification 2236 Service 1 18 ADD JAN 1985 Figure 1 2 Physical dimensions of the 2236 Oscilloscope ...
Страница 74: ...Theory of Operation 2236 Service 3 30 ...
Страница 75: ...Theory of Operation 2236 Service Figure 3 13 Typical waveforms for the Delta Time function with Valt HI 3 31 ...
Страница 102: ...Performance Check Procedure 2236 Service 4 21 Figure 4 1 Test setup for DMM common mode check ...
Страница 240: ...2236 Service CTM INTERFACE SIGNALS F ig u re 9 4 O s c illo s c o p e b a sic b lo c k diag ram 4294 46 ...
Страница 241: ... VERT DEFL 2236 Service 4 2 0 6 3 5 4 2 0 4 4 7 F ig u re 9 5 O scillo sco p e d e ta ile d b lo c k diag ram ...
Страница 242: ...2236 Service 4204 34 Figure 9 6 CTM basic block diagram ...
Страница 243: ...DMM POWER S U P P LIE S 2236 Service F ig u re 9 7 C T M d e ta ile d b lo c k diag ram ...
Страница 253: ...A10 COUNTER TIMER MULTIMETER BOARD F ig u re 9 8 C irc u it b o a rd lo c a tio n Illu s tra tio n ...
Страница 254: ...S I 0 O I 5 1 S O i 4204 21 C IR C U IT BOARD INTERCONNECTIONS ...
Страница 255: ...2 2 3 6 S e rv ic e A ll c o m p o n e n ts on th e A 2 A tte n u a to r b o a rd are lo c a te d on D ia g r a m ...
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Страница 313: ...2236 Service T O U I 3 0 0 4 8 K T O UI300 II S K 0 2 2 3 6 Z Z O A Z 2 OPTION IA ...
Страница 317: ...A 10 C O U N T E R T IM E R M U L T IM E T E R B O A R D A D J U S T M E N T LO C A T IO N S ...
Страница 319: ...2236 Service TROUBLESHOOTING GUIDE 4206 99 4204 69A ...
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Страница 324: ...2 REV APR 1986 ...
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