Tektronix 2247A

Introduction
The
vertical
deflection
system
has
four
Input
channels.
Two
channels
have
11
basic
deflection
factors
from
2
mV
to
5
V
per
division,
and
two
channels
have
two
basic
deflection
factors
of
0.1
V
and
0.5
V
per
division.
Basic
deflection
factors
can
be
extended
with
attenuator
probes.
VOLTS/DIV
readouts
are
switched
to
display
the
correct
vertical
scale
factors
when
properly
coded
probes
are
connected
to
the
vertical
input
connectors.
The horizontal deflection system provides single, dual, or delayed sweeps
from
0.5
s
to
20
ns
per
division
(delayed
sweep,
5
ms
to
20
ns
per
division)
.
The trigger system provides stable triggering over the full bandwidth of the
vertical deflection system.
Alphanumeric crt readouts of the vertical and horizontal scale factors are
displayed at the bottom of the screen. On-screen vertical and horizontal
cursors provide accurate voltage, time, frequency, and phase measure-
ments; measurement values are displayed at the top of the crt.
Measurement features Include voltage, time, frequency, and phase,
counter/timer measurements, and risetime/falltime or propagation delay.
Voltage measurements include positive peak, negative peak, peak-to-
peak, and average dc levels, measured over the entire display or a selected
portion (gated measurements) .
Counter/tlmer measurements include frequency, period, width, totalize,
frequency ratio, gated frequency, gated perlod, gated width, gated events,
delta time, one-over-delta time, phase, rise/fall time, and propagation
delay, using an Internal or external frequency standard. Counter/timer
measurements can be averaged to Increase the number of displayed digits,
and measurement trigger points can be Indicated with cursors on screen.
Positionable cursors allow absolute voltage, voltage difference, time dif-
ference, frequency, and phase measurements. SmartCursors® visually
track voltage measurements, trigger levels and ground and may be
selectively displayed with the waveforms. Time, frequency, and phase
measurements referenced to the trigger event or between two user-
selected events are available In ALT and B horizontal modes.
By pressing a single button (AUTO SETUP), the front-panel controls can
be set up to produce a usable waveform display based on the voltage and
time characteristics of the Input signals.
The Store/Recall system lets you store and recall up to 20 different front-
panel setups. Stored setups can be arranged in sequences as required for
specific applications.
1-2 2247A Operators