Operating Instructions; 7B53A/7B53An General; Installation - Tektronix 7B53A Instruction Manual

Section
1—
7B53A/7B53AIN1
OPERATING INSTRUCTIONS
7B53A/7B53AN
Features
The
7B53A
and
7B53AN
Dual
Time
Base
units
provide
Main,
Intensified,
Delayed, and Mixed sweep
operation
for
TEKTRONIX
7000-Series
Oscilloscopes. Calibrated sweep
rates
from
5
s/DIV
to
50 ns/DIV
(5
nanoseconds with
X10
magnification) and
triggering
to
100
megahertz
are
provided.
The 7B53A
and
7B53AN
are electrically identical
except
that only
the
7B53A
is
compatible with
the
alphanumeric
readout system provided
for
7000-Series
Oscilloscopes.
Other
features include 0 to 10 times continuous sweep
delay, variable
main
and delayed sweep
rates,
and
variable
main sweep
holdoff.
Separate
triggering controls
are
provided
for
main and delayed
sweep
triggering,
and
when
operating
in
the
AUTO
MAIN TRIGGERING MODE,
a
bright base
line
is
displayed
in
the absence of
a
trigger
signal.
The
7B53A/7B53AN
can
also
be used
as
an amplifier
for
X-Y
operation.
General
The
7B53A/7B53AN
operates with
a
TEKTRONIX
7000-Series Oscilloscope and
a
7A-Series Amplifier
unit to
form
a
complete
oscilloscope system.
To
effectively use the
7B53A/7B53AN
its
operation and
capabilities should be
known.
This
section describes the operation of the
front-
panel
controls
and
connectors,
provides an Operating
Checkout
procedure,
gives general operating
information,
and
basic applications for
this
instrument.
Installation
The 7B53A/7B53AN
is
designed
to operate
in
the
horizontal
compartment
of the
indicator oscilloscope.
This
instrument can
also
be
installed
in
the
Vertical plug-in
compartment
to
provide
a
sweep
that runs
vertically
on
the
CRT.
However,
when
used
in
this
manner,
there
are
no
retrace blanking or
internal triggering provisions,
and
the
unit
may
not meet
the specifications given
in
Section
2.
The
instructions
in
this
manual
are
written
for use of the
7B53A/7B53AN
in
the horizontal
plug-in
compartment.
Before proceeding with
installation
it
is
necessary
to
check
the
settings of the Variable
Selector
multi-pin
connector
{P
1
40)
and
the Delayed
Sweep
Gate
Out
multi-pin connector
(P613).
The
Variable Selector
multi-
pin
connector
(PI
40)
determines whether
the front-panel
VARIABLE
control
varies
main sweep
rates,
delayed sweep
rates,
or
main sweep
holdoff; the
Delayed Sweep) Gate
Out
multi-pin
connector (P613)
determines whether
the
Delayed
Sweep
Gate Out
signal
is
connected
to
the
front-panel
DLY'D TRIG
IN connector
(see Fig.
1-3).
Refer
to General Operating
Instructions
in this
section
for
VARIABLE
control
and
DLY'D GATE OUT
information.
Fo
install
the
7B53A/7B53AN
in a plug-in
compart-
ment, push
it
in until
it
fits
firmly
into the
compartment.
The
front panel of the
7B53A/7B53AN
should be
flush
with
the front panel of the indicator oscilloscope.
Even
though
the gain of
the indicator oscilloscope
is
standardized
to minimize adjustment
when
inserting plug-in units, the
sweep
calibration
of the
7B53A/7B53AN
should
be
checked
when
installed.
The
procedure
for checking
the
unit
is
given under
Sweep
Calibration
in
the Operating
Checkout
procedure
in this section.
To
remove
the
7B53A/7B53AN,
pull
the
release latch
(see Fig. 1-2) to
disengage
the unit
from
the indicator
oscilloscope and
pull
it
out
of the plug-in compartment.
Fig. 1-2. Location
of release
latch.
1-1