Tektronix 7B10 User Manual

Operating
Instructions—
7B
10 Operators
SWEEP
MAGNIFICATION
The
sweep magnifier
can be
used
to expand
the
display
be
a factor of
10. The
center
division
of the
unmagnified
display is
the
portion
visible
on the
crt
in the
magnified
form
(see Fig. 2-4).
The
equivalent
length
of
the
magnified
sweep
is more
than
100
divisions;
any
10
division
portion
can
be viewed
by
adjusting
the
POSITION
and FINE
POSITION
controls
to
bring
the
desired
portion
into
the
viewing
area.
When
the
MAG
switch
is
set
to
XI
0
(OUT)
the
equivalent
magnified
sweep
rate
can be
determined
by dividing
the
TIME/DIV
setting
by
10;
the
equivalent
magnified
sweep
rate is
displayed
on
the
crt
readout.
VARIABLE
HOLD
OFF
The
HOLD
OFF
control
improves
triggering
stability
on
repetitive
complex
waveforms
by effectively
changing
the
repetition rate
of the
horizontal
sweep
signal.
The
HOLD
OFF
control
should
normally
be
set
to its
minimum
setting.
When
a stable
display
cannot
be
obtained
with
the
TRIGGERING
LEVEL
control, the
HOLD
OFF
control
can
be
carried for
an
improved
display.
If
a
stable
display
cannot
be obtained
at any
setting of
the
LEVEL
and
HOLD OFF
controls,
check
the
TRIGGERING
COUPLING
and
source
switch
settings.
1
1
ms
JISPLAY
LAY
—
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-
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MAG-X1
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MS
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4—
MAGNIF
MED
DISP
im
Ill
C
1960-16
Fig.
2-4.
Operation
of
sweep
magnifier.
MAINFRAME
OPERATING
MODES
The
time-base
unit
can
be
operated
either
as an
independent
time
base
in any
Tektronix
7100-,
7700-,
7800-,
or
7900-series
oscilloscope
mainframes,
or
as
a
delayed-sweep
unit in
those
mainframes
that
have
two
horizontal
compartments.
A
companion
delaying
time
base unit is
required
for
delayed-sweep
operation.
Refer
to
the
delaying
time-base
unit
instruction
manual
for
additional
information.
APPLICATIONS
The
following information
describes
procedures
and
techniques for making
basic time
measurements
with
the
time-base
unit installed
in
a
Tektronix
7100,
7700, 7600,
or 7900-series
oscilloscope.
These
procedures
provide
enough detail
to
enable
the
operator
to adapt
them
to
other
related time
measurements.
Contact
your
Tektronix
Field
Office or
representative
for
assistance in
making
measurements
that are
not described
in
this manual.
TIME-INTERVAL
MEASUREMENTS
Since time
is a function
of the
sweep rate
and
the
horizontal
distance
(in divisions)
that the
sweep
travels
across
the graticule
in a
calibrated-sweep
oscilloscope
system,
the time interval
between
any two
points
on
a
waveform
can be accurately
measured.
The
following
procedures
provide methods
to
measure some
of
the
more
common
time-related
definable
characteristics
of
a
waveform
such
as period,
frequency,
rise
time, fall
time,
and pulse
width.
The
procedure for
each of
these
measurements
is
essentially the
same,
except
for the
points
between which
the
measurements
are made.
The
time interval
between
any
two
selected
points
on a
displayed
waveform
can
be measured
with
basically
the
same
technique.
PERIOD
AND
FREQUENCY
MEASUREMENTS
Perform the following
procedure
to measure
the
period
and
determine the
frequency
of
a
displayed
waveform:
1. Install
the
time-base unit
in
a mainframe
horizontal
compartment
(either A
or
B horizontal
in
a four-
compartment
mainframe).
2. Connect
the signal
to be
measured
to the
vertical
unit
input.
3.
Set the
mainframe
horizontal-
and
vertical-mode
switches
to display
the time
base
and vertical
units.
(Check that
the time
base VARIABLE
(CAL IN)
control
is
pushed in
and the
HOLD OFF
control
is in
the
MIN
position.)
4.
Set the TRIGGERING
switches and
LEVEL
control
for
a
stable display
(see General
Operating
Information
for
selecting
proper triggering).

Tektronix 7B10 Specifications

General

Brand	Tektronix
Model	7B10
Category	Test Equipment
Language	English