Tektronix 2247A

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Performance Check Procedure
CHECK—that
the
sum
of
the
two
readouts
Is
between
999.986
and
1000.014
jis.
Disconnect the test equipment from the 2247A.
Rise Time Accuracy
Set:
VERTICAL MODE CH 1 (CH 2 off)
CH 1 VOLTS/DIV 0.2Vv
A SEC/DIV 0.2 ps
A SLOPE St
Connect
sine-wave
generator
(SG
503)
to
the
CH
1
Input
connector
via
a
50
©
cable
and
a
50
2
terminator.
Set
the
leveled
sine-wave
generator
Frequency
to
1
MHz
and
the
Ampl.
Multiplier
to X1,
Press the COUNTER/TIMER button. Select FREQ.
Adjust
the
sine-wave
generator
for
five
divisions
of
signal.
Adjust
the
sine-wave
generator
for
0.998,000,0
MHz
(998.000.00
kHz)
to
1.002,000,0
MHz
readout
on
the
crt.
Press
the
TIME
button.
Select
(TO
RISE/FALL
MENU),
Select
TRIG
10-90.
Select
RISE.
CHECK—for
a
readout
between
260.11
and
330.23
ns.
NOTE
A
1
MHz
sinewave
has
a
10-90%
rise
time
of
295.167
ns;
20-80%
rise time is 204.833 ns.
Move
the
sine-wave
generator
to
the
EXT
COUNTER/TIMER
TIME
BASE
INPUT
on
the
Rear
Panel
of
the
2247A.
Press
the
COUNTER/TIMER
button,
and
select
FREQ.
2247A
Operators
7-59