Operation
Readout
To aid waveform interpretation, the readout shows scale factors, delta
measurements, delay times, trigger settings, and other information. To display all
readout information, set the READOUT INTENSITY control clockwise from OFF
(SCALE FACTORS ON). See Figure 2-1.
2-8
Trigger Readout
The trigger readout shows which trigger
(A
or
8)
is affected by the controls
(Mode, Source, Coupling,
Slope, Level, and INIT@50%), which channel (1-4)
is
supplying the trigger signal, and the voltage at which triggering takes place,
with the
following settings:
Trigger
Coupling
Trigger Source
Vertical Input
VOLTS/DIV VAR
DC
or
Noise Reject
Any
Single Channel
Dc
or
Gnd
Fully Clockwise.
If the trigger comes from the word recognizer, which is available with the
CTT, the readout shows the defined word.
Readout Intensity
To display nothing but measurements, set the READOUT INTENSITY
control counterclockwise from OFF (SCALE FACTORS OFF). Rotate the control
toward
OFF
to
decrease readout brightness. When the sweep is faster than
50 ILs/division, random
2-ILs
segments
of
the waveform may be missing. Set
the control near the center
of
the word "OFF"
to
eliminate this interference
between the waveform and the readout.
Scale Factors
CH
1 and CH 2 scale factors include "mV"
or
"V" units indicators. A tilde
(N)
over the V indicates AC input coupling. A ground symbol
in
front of the number
indicates Gnd input
coupling. A greater-than symbol
(»
indicates the
VOL TS/DIV VAR control is not at its clockwise, calibrated position. A plus sign
(+)
shows that Add, the algebraic sum
of
CH 1 and
CH
2,
is displayed. A
down
arrow
shows that
CH
2 is inverted.
2465A/2455A/2445A Operators
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