Tektronix 2247A

Controls, Connectors, and Indicators
2. Sets the B sweep delta delay in TIME measurement mode
when In the ALT or B Horizontal MODES.
3. Sets the width of the intensified zone for GATED VOLTMETER
and GATED C/T measurements.
4. Changes the setup number or characters in Store/Recall.
NOTE
The reference and delta cursors will only track together as
long as the reference delay plus the delta delay is less than
10 times the A SECIDIV setting (10 horizontal graticule
divisions). Cursors cannot be positioned left of the 1st or
right of the 11th vertical graticule lines.
UNCAL Indicator—Lights when the A AND B SEC/DIV settings are
uncalibrated (variable function in effect).
TRACE SEP Control—Positions the B sweep trace vertically with
respect to the A sweep trace when ALT Horizontal MODE Is selected.
Trigger
Refer to Figure 2-5 for location of items 32 through 38.
@2)
A/B
SELECT
Button—Directs
the
MODE,
SOURCE,
CPLG,
SLOPE,
and LEVEL controls and Trigger lights (TRIG'D and READY) to either
the A or B Trigger system (A, when lit; B, when not lit).
Either
A
or
B
trigger
can
be
selected
for
any
Horlzontal
MODE;
however,
A/B
SELECT
Is preset
to
A when
A Horizontal
MODE
Is
selected,
and
B
when
ALT
or B
Horizontal
MODE
Is selected.
No
change
occurs
when
switching
from
8 to X-Y
Horizontal
MODE.
For
dual-channel
C/T
measurements,
this
button
cycles
through
three
trigger
sources:
A,
B
source
1,
and
B
source
2.
The
button
is
lit
when
A
Is
selected
and
unlit
for
either
B
source.
If
no
menu
is
being
displayed,
the
second-from-top
readout
line
will
show
which
of
the
three
trigger
sources
Is
selected,
along
with
slope,
as
shown
below:
2-12 2247A Operators
ws