Tektronix 2247A

Operators Familiarization
Voltmeter
Measurements
Page
1
DC—Measures
the
average
DC
level
of
the
measurement
channel
waveform,
+PEAK—Measures
the
most
positive
(screen-relative)
voltage
in
the
applied
waveform.
-PEAK—Measures
the
most
negative
(screen-relative)
voltage
in
the
applied
waveform.
PK-PK—Measures
the
peak-to-peak
voltage
of
the
applied
waveform.
SELF
CAL—Self
characterizes
the
vertical
system.
SELF
CAL
may
be
performed
at
any
time.
Suggested
times
are:
after
a
warmup
period,
whenever
the
ambient
operating
temperature
changes
by
+15°C,
and
Just
prior
to
making
any
voltmeter
measurements
requiring
the
best
possible
accuracy.
(TO
GATED
MEASMT
MENU)-—Selects
the
gated-measurement
menu.
Voltmeter
Measurements
Page
2,
Gated
Measurements
The
oscilloscope
must
be
Properly
triggered
for
gated
measurements.
If
there
Is
no
trigger
signal
In
NORM
Trigger
MODE,
the
message
“LO
REP
RATE
-
STILL
TRYING”
will
be
displayed.
If
there
is
no
trigger
signal
in
AUTO
LEVEL
or
AUTO
Trigger
MODE,
the
readout
value
will
be
unstable
and
meaningless.
Gated
Voltmeter
measurements
are
made
within
the
gated
(intensified)
region
on
the
displayed
waveform.
The
Position
of
the
gated
zone
is
set
using
the
- OR
DELAY
control,
and
the
width
Is
set
using
the
|
control.
Gated
measurements
are
not
allowed
In
SGL
SEQ
Trigger
MODE;
active
gated
measurements
will
be
canceled
if
SGL
SEQ
Trigger
MODE
Is
selected.
If
a
gated
voltage
measurement
is
selected
after
switching
to
SGL
SEQ
TRIGGER
MODE,
the
message
“NOT
ALLOWED
IN
SSEQ”
is
displayed
for
about
two
seconds.
GATED
+PEAK—Measures
the
most
Positive
(screen-relative)
voltage
In
the
gated
(intensified)
portion
of
the
waveform.
GATED
-PEAK—Measures
the
most
negative
(screen-relative)
voltage
In
the
gated
(intensified)
portion
of
the
waveform.
2247A Operators
co
=
L