Tektronix 2247A

7-62
Performance Check Procedure
Connect
calibration
generator
(PG
506)
Std
Ampl
output
to
the
CH
1
and
the
EXT
Z-AXIS
Inputs
via
a
50
precision
BNC
coaxial
cable,
a
BNC
T-connector,
and
two
50
2
BNC
coaxial
cables.
Set
generator
to
Std Ampl output, 5 V,
Set A INTEN to maximum intensity.
CHECK—waveform
display
Intensity
starts
decreasing
at
1.8
V
or
less
and
the
waveform
Is
completely
blanked
out
at
3.8
V.
Set A INTEN to midrange.
Disconnect the test equipment from the 2247A.
PROBE ADJUST Output
Set:
CH 1 Vertical MODE 10 mV
SEC/DIV 0.2 ms
Connect
a
10X
probe
to
the
CH
1
Input
connector
and
connect
the
probe
tlp
to
the
2247A
PROBE
ADJUST
output.
(When
using
Tektronix
coded
probes
the
readout
changes
to
.1V.)
CHECK—for
a
5-division
vertical
display
of
PROBE
ADJUST
square-
wave
signal
(square-wave
period
Is
typically
1
ms,
within
25%).
AUTO SETUP Functional Check
Set:
CH
1
COUPLING
GND
CH
1
VOLTS/DIV
2mvV
A
SEC/DIV
20
ns
Press the AUTO SETUP button.
Check
that
the
Probe
Adjust
waveform
Is
stably
displayed
on
the
upper
half
of
the
crt.
2247A Operators
c-3
1
ES
HS
CS