Section
1-7B53A/7B53AN
OPERATING INSTRUCTIONS
7B53A/7B53AN
Features
The 7B53A
and 7B53AN Dual Time Base units provide
Main,
Intensified, Delayed, and Mixed sweep operation for
TEKTRONIX 7000Series 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.
Before
proceeding
with installation it
is necessary to
check
the
settings
of the Variable Selector multi-pin
connector
(P140)
and the
Delayed Sweep Gate Out
multi-pin
connector (P613). The Variable Selector multi
pin
connector (P140) 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.
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.
To
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.
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.
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
