Tektronix 2247A

Performance Check Procedure
g. Repeat the procedure for CH 2.
h.
Disconnect the test equipment from the 2247A.
22. Vertical ALT and CHOP Modes
a. Set:
Vertical MODE CH 1, CH 2,
CH 3, and CH 4
on
CHOP Vertical MODE Off (ALT
mode)
CH 1 and CH 2
VOLTS/DIV 10 mv
CH 3 and CH 4
VOLTS/DIV O.1Vv
CH 1 and CH 2 Input
COUPLING DC
Horizontal MODE A
SEC/DIV 0.1 ms
Trigger MODE AUTO LEVEL
b.
Position
all
traces
for
two
divisions
of
separation
with
the
CH
1
trace
near
the
top;
then
in
order
down
the
graticule
area
with
the
CH
4
trace
near the bottom.
c. Set SEC/DIV to 10 ms.
d.
CHECK—that
four
traces
are
sweeping
across
the
screen
alternately.
e. Set CHOP Vertical MODE On.
f.
CHECK—that
four
traces
are
sweeping
across
the
screen
simultaneously.
23. BEAM FIND Functlonal Check
a. Push BEAM FIND In and hold.
b.
CHECK—the
signal
Is
visible
and
compressed
fully
within
the
graticule
area
as
the
horizontal
and
vertical
position
controls
are
rotated
through
thelr ranges.
7-26
2247A Operators
4
ra