Tektronix 2247A

Controls, Connectors, and Indicators
Horizontal
Refer to Figure 2-4 for location of items 24 through 31. tee
POSITION Control—Adjusts the horizontal position of the waveform i
displays
on
the
crt.
a
@5) X10 MAG Switch—Magnifles the A and B sweeps by a factor of 10
and extends the fastest sweep speed to 2 ns per division. The center
Portion of an unmagnified sweep display will be within 0.5 division of
the center of a magnified sweep display. No action occurs in X-Y
mode.
When X10 MAG Is on, a X10 symbol is displayed next to the SEC/DIV
readouts. The readouts reflect correct display sweep speeds for the
X10 MAG displays and the unmagnified displays.
MODE Buttons (Up-Arrow and Down-Arrow) and_ Indi-
cators—Select the operating mode of the horizontal deflection
system. Pressing the Up-/Down-Arrow buttons selects the horizontal
deflection mode as shown by the MODE lights. Not all Menu Measure-
ment modes are compatible with all horizontal deflection modes. See
Table 3-1, Behavior for Horizontal MODE Changes, In Section 3.
A—Selects A sweep horizontal deflection. The A sweep speed is
determined by the A SEC/DIV switch setting as displayed in the crt
readout. Whenever A MODE Is selected, the A/B SELECT switch is
set to A Trigger.
ALT—Alternates
between
A
sweep
(with
an
Intensified
zone
repre-
senting
B
sweep)
and
B
delayed
sweep.
Both
A
and
B
SEC/DIV
switch
settings
are
displayed
in
the
crt
readout,
but
only
the
B can
be
adjusted.
Whenever
ALT
MODE
Is
selected,
the
A/B
SELECT
switch
Is set
to
B
Trigger.
The
B
sweep
speed
cannot
be
set
slower
than
the
A
sweep
speed;
attempting
to
do
so
forces
the
A
sweep
speed
to
follow
the
B
sweep
speed.
To
Increase
the
A
sweep
speed
In
the
ALT
MODE,
set
the
Horizontal
MODE
to
A,
adjust
the
SEC/DIV
switch
to
a
faster
A
sweep
setting,
and
reset
the
Horizontal
MODE
switch
to
ALT.
The
B
sweep
speed
and
the
length
of
the
intensified
zone
are
determined
by
the
B
SEC/DIV
switch
setting.
2-8
2247A
Operators