Tektronix 7834 User Manual

Operating Instructions-7834
26 . Set the HORIZONTAL
MODE switch
to CHOP . Notice
that two traces are
displayed on the crt
in a manner similar
to that of the ALT
display . Turn the
sweep rate switches
of
both time-base units
throughout
their ranges . Observe that
two traces are
displayed on the crt at
all sweep rates . Also
notice that when
both time-base units
are set to a slow
sweep rate (50
milliseconds/division or slower),
both traces
are visible on the crt
at the same time .
Return the sweep
rate switches of
both time-base units to
0 .5 millisecond/
division .
27 . Set
the CALIBRATOR
switch to 0 .4 V .
Set the
VERTICAL MODE switch
to CHOP . Four traces
should be
displayed on the crt .
If not, adjust the
position controls of
the amplifier units
and the VERT TRACE
SEPARATION
(B) control to
position the four traces
into view . Set the
position controls
of the plug-in
units to identify which
trace is
produced from each
plug-in unit (if
amplifier units
have the
identify feature, it
can be used to identify
the
traces) .
Set the A time-base
unit for a sweep rate of 1
milli-
second/division . Notice that
the left-amplifier
unit is
displayed at the sweep rate of
both the A and
B time-base
units
and that the
right-amplifier unit is also
displayed at
the
sweep rate of both
time-base units .
28 .
Set the HORIZONTAL
MODE switch
to ALT . Observe
that the display is
very similar to that
obtained in the
previous step .
The main difference in
this display is that
the
traces are now
displayed alternately
(noticeable only at
slow sweep rates) .
29 . Set the VERTICAL
MODE switch to
ALT . Set the
CALIBRATOR
switch to 4 V . Notice
that the trace
produced by
the left amplifier unit is
displayed at the
sweep rate of the B
time-base unit and the trace
produced
by
the right amplifier unit
is displayed at the
A time-base
unit sweep rate . This
feature is called
independent-pairs
operation and is
obtained only when the
VERTICAL MODE
switch is in
the ALT position and
the HORIZONTAL
MODE switch
is in either the ALT
or the CHOP position .
Triggering
30 . Set the
VERTICAL MODE switch to
LEFT and the
HORIZONTAL MODE
switch to A . Center
the display on
the crt with the
left amplifier unit position
control . Dis-
connect
the input signal from the
right amplifier unit
input
connector
. Sequentially select
all of the VERTICAL
MODE
switch
positions . Notice that
a stable display is obtained
for
all
positions of the VERTICAL
MODE switch (straight line
in
RIGHT switch position) .
31 . Set the A
TRIGGER SOURCE switch to
LEFT VERT .
Again, sequentially
select all of the VERTICAL
MODE
switch positions .
Notice that the display is
again stable in
all positions, as in
the previous step .
32 . Set
the A TRIGGER
SOURCE switch to
RIGHT
VERT .
Sequentially select all of
the VERTICAL
MODE
switch
positions and notice that a
stable display
cannot be
obtained
in any position (this
is because there is
no input
signal
connected to the right
vertical unit)
.
Return
the A
TRIGGER
SOURCE switch to
VERT MODE .
33 . The B
TRIGGER SOURCE
switch operates
in a manner
similar to
the A TRIGGER
SOURCE switch
when the B
time-base
unit is selected to
provide the display .
Set the B
TRIGGER
SOURCE switch
to VERT MODE
.
34 . Set the
HORIZONTAL MODE
switch to ALT or
CHOP . Notice
that this is the same
display obtained
in
step 29
(independent-pairs
operation) .
Readout
NOTE
The following 3
steps apply only to
instruments
equipped with
Readout ; for Option 1
instru-
ments proceed to
step 38 .
35 . Turn the
READOUT control
clockwise until an alpha-
numeric display
is visible within the top
or botton division
of the crt . Change
the deflection factor
of the amplifier
unit that is selected
for display ; notice
that the readout
postion of the display
changes as the
deflection factor is
changed . Likewise, change the
sweep rate of the
time-base
unit which is selected
for display ; notice
that the readout
display for the
time-base unit changes as
the sweep rate is
changed .
36 . Set the time-base
unit for X10
magnification . Notice
that the readout
display changes to
indicate the correct
magnified
sweep rate . If a readout-coded
10X probe is
available
for use with the amplifier
unit, install it on
the
input connector of the right
amplifier plug-in
unit . Notice
that the deflection factor
indicated by
the readout is
increased by 10 times
when the probe is added
. Return the
time-base unit to
normal sweep operation and
disconnect
the probe .
37 . Sequentially
select all of
the VERTICAL MODE
and
HORIZONTAL MODE switch
positions . Notice that
the
readout from a particular
plug-in occupies a specific
location
on the display area . If either of
the vertical plug-in
units is a
dual-trace unit, notice that
the readout for
channel 2
appears within the lower
division of the crt .
Return the
VERTICAL MODE switch
to LEFT and the
HORIZONTAL
MODE switch to A . Set
the READOUT control to
OFF .

Tektronix 7834 Specifications

General

Brand	Tektronix
Model	7834
Category	Test Equipment
Language	English