Tektronix 2247A

|
v3
®
I
Jj
&
Rs
Performance
Check
Procedure
18.
SCOPE
BW
(Bandwidth
Limit)
Accuracy
a. Set:
Vertical
MODE
CH
1
(CH
4
off)
CH
1
VOLTS/DIV
10
mV
SCOPE
BW
On
b.
Move
test
signal
from
the
CH
4
Input
to
the
CH
1
input.
c.
Set
leveled
sine-wave
generator
(SG
503)
output
for
a
six-division
signal amplitude at 50 kHz.
d.
Increase
the
leveled
sine-wave
generator
output
frequency,
using
the
Frequency
Range
and
Frequency
Varlable
controls,
until
a
slgnal
display
amplitude
of
4.2
divisions
Is
obtained.
e.
CHECK—that
the
sine-wave
generator
output
frequency
Is
between
17 MHz and 23
MHz.
f. Disconnect
the test setup.
19,
Common-Mode
Rejection
Ratlo
a.
Connect
leveled
sine-wave
generator
(SG
503)
output
to
the
CH
1
and
CH
2
Input
connectors
via
a
50
2
precision
BNC
coaxial
cable,
a500
BNC
termination,
and
a
BNC
dual-input
coupler.
b.
Set
the
leveled
sine-wave
generator
output
for
an
elght-division
signal-
display
amplitude
at
50
kHz.
c. Set:
Vertical
MODE
ADD
(CH
1
off)
CH
2
VOLTS/DIV
10
mV
CH
2
INVERT
On
SCOPE
BW
Off
d.
Adjust
CH
1
or
CH
2
VAR
VOLTS/DIV
for
smallest
signal
amplitude
(as
needed).
e.
Set
the
leveled
sine-wave
output
frequency
to
50
MHz.
f.
Set
the
Vertical
MODE
to
CH
1
(ADD
off).
2247A
Operators
7-23