Tektronix 2247A

Operators
Familiarization
If
the
reference
cursor
Is
appropriate
to
the
measurement
mode,
it
will
be
set
as
specified
for
the
reference
delay
with
the
assump-
tlon
that
the
sweep
start
Is
at
the
left
graticule
line.
The
delta
cursor
or
delta
delay,
as
appropriate
to
the
measure-
ment,
will
be
set
one
perlod
of
the
trigger
signal
to
the
right
of
the
reference
cursor
or
delay,
if
possible;
If
not
possible,
it
will
remain
unchanged.
Cursors
and
delays
may
remain
unchanged
If:
(1) there Is no A trigger, or
(2)
the
trigger
source
channel's
signal
has
a
repetition
rate
slower
than
20
Hz
or
faster
than
100
MHz.
Under
the
conditions
of
1
and
2
above,
a
question
mark
may
appear
before
the
measurement
value
and
remain
until
the
A
or
|&
knob
is
moved.The
user
should,
however,
always
Inspect
the
display
to
determine
that
the
cursors
or
Intensified
zones
mark
appropriate
places
on
the
waveform.
There
are
waveforms,
such
as
very
narrow
pulses
or
multiple
crossings
of
the
trigger
level
within
one
period,
that
can
cause
erroneous
Initialization
with
no
question
mark.
When LAST
MEAS'MT
Is
selected
and
the
last
measurement
was
I
SEC
+
or
|e
1/SEC
+4,
or
the
last
action
was
ke
SET
360°,
cursors
or
delays
will
be
reinitializad
as
above
If
configured
to
Initiallze
time
measurements
and
the
instrument's
mode
Is
appropriate.
Accuracy
of
the
cursor
or
delay
placement
Is
as
specifled
for
the
selected
measurement.
PRESET
TV
TRIG
SLOPE
FOR
-SYNC?
(Factory
Settings
default
Is
YES.)
Selecting
YES
will
cause
the
trigger
slopes
to
preset
to
“-"
when
TV
trig
mode
Is
selected,
and
the
configure
menu
Is
exited.
If
NO
Is
selected,
a
second
question
Is
presented:
PRESET
TV
TRIG
SLOPE
FOR
+SYNC?
(Factory
Settings
default
is
NO.)
Selecting
YES
will
cause
the
trigger
slopes
to
preset
to
“+"
when
TV
trig
mode
Is
selected,
and
the
configure
menu
Is
exited.
If
NO
Is
selected,
the
scope
will
not
use
a
preset
slope
when
a
TV
trig
mode
Is
selected.
£
Cd
When
the
final
question
Is
answered,
the
SERVICE
MENU
display
returns.
3-38
2247A
Operators