Operating Instructions—7B53A/7B53AN Operators
2.
Sweep Controls
TIME/DIV
OR DLY TIME. Selects the sweep rate of the
main
sweep
generator
(see
Fig. 1-7).
DLY'D
Time/Division. Selects the sweep rate of the
delayed
sweep generator and selects the MAIN SWP,
INTEN,
and
DLY'D SWP Display Modes (see Fig. 1-7).
VARIABLE.
Provides continuously variable main sweep
rates,
continuously variable delayed sweep rates, or variable
main
sweep holdoff;
depending on
the setting of the
Variable Selector
multi-pin connector (P140). The VARI
ABLE
control
also selects the MIXED Display Mode (see
Fig. 1-3,
Fig.
1-7).
SWP
CAL. Screwdriver adjustment to match the gain of
the 7B53A/7B53AN to the
indicator
oscilloscope for
calibrated sweep rates.
POSITION.
Controls
horizontal position of
display.
FINE.
Provides
precise control of horizontal position
adjustment.
MAG.
Pushbutton switch selects X1 or X10 horizontal
magnification.
3.
Delay
Time
Control
DELAY TIME
MULT. Provides
variable sweep delay
between
0.00 and
10.0 times the delay
time indicated by
the
TIME/DIV
OR
DLY TIME switch.
4.
Delayed
Triggering
Controls
LEVEL.
Selects
the RUNS AFTER DLY
TIME or
Triggerable
After Dly Time Modes, and the amplitude point
at
which the
delayed
sweep is triggered.
SLOPE. Two-position
switch permits triggering on
the
positive-going
or negative-going
portion of
the delayed
triggering
signal.
COUPLING.
Two-position switch selects the
method of
coupling
the
triggering
signal to the delayed triggering
circuits.
SOURCE. Two-position
switch to
select the source of
the
delayed
triggering signal.
5.
Input/Output
Connectors
MAIN TRIG IN OR AMP IN. Front-panel
BNC connec
tor
serving as an
external trigger input
for the main
triggering
circuit
or as
an
external horizontal input,
depending
upon
the setting of the TIME/DIV OR DLY
TIME switch
and the MAIN TRIGGERING SOURCE
switch.
DLY'D
TRIG
IN. Front-panel BNC connector serving as
an
external trigger input for
the delayed
triggering circuits
or
as a delayed sweep gate output;
depending
upon the
DLY'D
TRIG
SOURCE switch, the position
of P613, and
the DISPLAY
MODE.
OPERATING
CHECKOUT
Introduction
The following
procedure checks the basic operation of
the
7B53A/7B53AN. It may also
be used for familiarization
with
this instrument
or as an incoming inspection.
This
procedure
is
divided
into
two parts. Sweep Control
Functions, and Main
and Delayed Triggering Functions. A
complete
operating
check
of the 7B53A/7B53AN control
functions
can
be made by performing
both parts, or each
part
may
be performed
separately.
NOTE
For
optimum performance, the 7B53A/7B53AN
should be installed
in an oscilloscope system with
similar frequency and
sweep rate capabilities.
Setup
Procedure
1.
Install the 7B53A/7B53AN
in the
right horizontal
compartment
of
the indicator oscilloscope.
2.
Install
a
Vertical Amplifier unit in the left vertical
compartment.
3. Turn
on the indicator oscilloscope and allow at least
20 minutes warmup.
4.
Set
the 7B53A/7B53AN controls
as follows:
MAIN
TRIGGERING
SLOPE
(+)
MODE
AUTO
COUPLING
AC
SOURCE
INT
1-4
