Operating Instructions-2225 Service
CHOP-Switches the display between the
Channel 1 and Channel 2 vertical input
signals during the sweep. The chopped
switching rate (CHOP frequency) is
approximately 500 kHz.
@
CH 1 and CH
2
VOLTSIDIV Switches-Select
the vertical channel deflection factors from
5
mV to 5 V per division in a 1-2-5 sequence.
1X-Front-panel marking that indicates the
deflection factor set by the VOLTSIDIV
switch when a
1X probe or a coaxial cable is
attached to the channel input connector.
1OX PROBE-Front-panel marking that indi-
cates the deflection factor set by the
VOLTSIDIV switch when a
10X probe is
attached to the channel input connector.
@
Variable VOLTSlDlV and XI0 Vertical Magni-
fication Controls-Provide continuously
variable deflection factors between calibrated
positions of the VOLTSIDIV controls and
X1 or
XI 0 vertical magnification of the displayed
signal. The VOLTSIDIV sensitivity may be
reduced by up to at least 2.5 times at the fully
counterclockwise rotation of the variable
(CAL) knob. A detent position at full clockwise
rotation indicates the calibrated VOLTSIDIV
position of the variable knob.
XI0 vertical magnification of a displayed sig-
nal is obtained by pulling the variable (CAL)
knob to the out position. A yellow ring is
visible on the knob in the
XI0 Vertical
Magnification position.
@
AC-GND-DC (Input Coupling) Switehes-
Select the method of coupling the input signal
from the CH 1
OR
X and CH 2
OR
Y connectors
to the vertical amplifiers.
AC-Capacitively couples the input signal to
the vertical deflection system. The dc com-
ponent of the input signal is blocked. The
lower
-3
dB bandpass is 10 Hz or less.
GND-Grounds the input of the vertical de-
flection channel; provides a zero (ground)
reference voltage display (does not ground
the input signal).
DC-All frequency components of the input
signal are coupled to the vertical deflection
and signal acquisition systems.
@
CH 1
OR
X
and CH
2
on
Y
Input Connectors-
Provide for application of signals to the inputs
of the deflection systems.
In X-Y mode, the signal connected to the CH
1
OR
X input controls the horizontal deflection,
and the signal connected to the CH 2
OR
Y
input controls the vertical deflection.
HORIZONTAL
@
COARSE Horizontal POSITION Control-Po-
sitions all the waveforms horizontally over
a
one-sweep-length range (for XI, X5, X10, or
X50 Magnified)
.
@
FINE Horizontal POSITION Control-Allows for
fine adjustment of the horizontal
~osition of
displayed waveforms.
@
Horizontal MODE Switch-Selects the
horizontal mode of operation.
X1-This is the normal mode of operation
with the waveform being unmagnified
horizontally.
ALT-Displays the unmagnified waveform
and the horizontally magnified waveform
alternately.
MAG-Displays only the horizontally magni-
fied waveform.
The amount of horizontal magnification is
set by the Horizontal MAG switch (X5,
X10,
X50).
@
SEClDlV Switch-Selects calibrated sweep
rates from 0.5 s to 0.05
bs per division in
a
1-2-5 sequence of 22. steps. The X-Y
position selects the X-Y mode; the CH 1
OR
X
input signal produces horizontal deflection for
X-Y displays, and the CH 2
OR
Y input signal
produces vertical deflection.
Scam
by
ARTEK
MEDL4
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