Tektronix 2247A

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Controls, Connectors, and Indicators
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Figure
2-3.
Vertical
connectors
and
CH
3
and
CH
4
controls.
Auxillary
Ground
Jack—Provides
an
auxillary
chassis
ground
con-
nection
(banana
Jack)
between
the
equipment
under
test
and
the
2247A.
@1)
Channel
3
and
Channel
4
POSITION
Controls—Adjust
vertical
position
of
Channel
3
and
Channel
4
signal
displays.
@2)
Channel
3
and
Channel
4
VOLTS/DIV
Switches—Select
two
basic
deflection
factors
for
Channel
3
and
Channel
4,
0.5
volt/division
(but-
ton
lit)
or
0.1
voit/division
(button
not
lit).
The
VOLTS/DIV
switch
setting
displayed
In
the
crt
readout
reflects
the
attenuation
factor
of
coded
attenuator
probes
that
are
connected
to
the
vertical
inputs.
@3)
CH
3
and
CH
4
Input
Connectors—Connect
signals
to
the
inputs
of
the
Channel
3
and
Channel
4
vertical
attenuators.
Input
coupling
is
de
only.
The
Input
connectors
are
BNC
with
probe-coding
ring
contacts
(the
same
as
Channel
1
and
Channel
2).
The
limited
choice
of
deflection
factors
for
the
Channel
3
and
Channel
4
Inputs
makes
them
useful
for
digital
and
trigger
signals.
2247A
Operators
2-7