5812N
SECTION 1
OPERA TING INSTRUCTIONS
I
nstrument Description
The
5B 12N
D
u
a
l Time Base is
a
dual-sweep plug-in for
use with Tektronix 5100-Series Oscilloscopes. The plug-in
features two time-base generators, and is capable
of
pro
ducing two independent sweeps or
a d
el
a
y
e
d sweep. The
A
Sweep time base provides normal sweep rates from 1
microsecond/division to 5 seconds/division;
a
10 t
i
m
e
s
m
a
gni
f
ier extends the displayed sweep time/division to 100
na
n
ose
c
o
n
d
s
.
The
B
Swee
p
provides sweep
rates
from 0.2
microsecond/division to 0.5 second/division. The plug-in
also
a
cc
epts external signals to be displayed in lieu of the
A
Sweep. An illuminated knob skirt provides direct readout
of the sweep rates and deflection factors.
CONTROLS
AND
CONNECTORS
This is
a
brief
description of the function or operation of
the front·panel controls
and
connectors. More detai led
information
is given under Genera!
Information.
DISPLAY
MODE
Applies logic levels to the oscillo
s c o pe s y s tem to select Chop
(button pushed
in)
or Alternate
(button out) time-shared switching
between
vertical plug-ins and
ampli
f
i
e
r c
h
a
n
n
els.
A:
Selects
A
Time Base as the
oscilloscope time base. B
T
i
me
Base
is locked
out.
B: Selects B Time Base as the
oscilloscope time base.
A
Time
Base is locked
out.
DUAL SWEEP
(both the
A
and B
buttons pushed in): Selects time
shared switching between
the
A
and
B time bases.
If
both vertical
plug-ins are active,
the A
Time
Base is slaved to the left vertical
plug-in and
the B
Time Base is
slaved to the right vertical
plug
in.
A INTEN-B DLY'D
(this button is
dependent upon the
A
and
B
buttons):
Button in permits
dis
p
la
y of the
A
Time Base, with
1-1
the B Time Base
operating con
currently and appearing as
an
i nt e n sifi e d
segment (the A
button must be pressed in), or
it
permits display of the
8 Ti
m
e
Base, starting after a delay time
established by the setting of the
A SECONDS/DIV
switch and
the
DELAY TIME MULT
dial
(
t
h
e B
button
must be
pr
e
ss
e
d
in), or display is presented with
the
A
sweep being intensified
and the
B
sweep being delayed
(both the
A
a
nd
B
buttons must
be pressed
i
n).
B
TRIG AFTER DELAY: P
e
rmits
the B Time Base to
be
triggered
after a delay
time established by
the setting
of
the
A SECONDS/
DIV
switch and the
DELAY
TIME MUL T dial.
AUTO TR IG: If
triggering signal is
absent or occurs at
a
rate
less
than 15 hertz, the sweep genera
t ors revert to a free-running
mode
(bright baseline). Button
ou t selects Normal Triggered
Mode.
Di
s
p
l
a
yed time base
depends on
DISPLAY MODE
selected.
A SINGL
SWP:
Button in selects
the Single Sweep Mode, allowing
t
h
e
A
Time Base to be triggered
only once until manually reset.
Button out permits repetitive
A
sweep.
A RESET:
Resets sweep circuits to
accept
next t
rigg
e
r
when in the
Single Sweep Mode. Terminates
sweep
if in
process in any sweep
mode.
READY INDI CATOR I
n
dicat
e
s
when
t
h
e
A
s
w
ee
p
circuit
is triggerable in Single Sweep Mode.
DELAYTIMEMULT
Provides v
a
r
i
a
bl
e
B·sweep
de
l
a
y
between 0.20 and 10.20 times the
delay
time indicated by the
A
Summary of Contents for 5B12N
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