Tektronix 2247A

Basic Applications
NOTE
For Increased resolution of the phase measurement, the
sweep many be increased and both cursors repositioned to
the measurement points (see Figure 5-5C). The X10 MAG
feature may also be used In a similar manner by placing the
measurement points at the center vertical graticule line
before pressing the X10 MAG button (you may want to re-
duce the A SECIDIV setting prior to turning on the X10
MAG feature).
Frequency and Period Measurements
The
2247A
has
an
elght-diglt
frequency
counter/timer
bullt
In
to
make
accurate
frequency
and
period
measurements
quickly
and
easily.
Use
the
Procedure
for
making
time-difference
measurements
to
get
a
stable
dis-
play.
Then
press
the
COUNTER/TIMER
button
and
select
the
desired
measurement
from
the
menu.
The
frequency
(or
period)
will
be
displayed
in
the
upper
right
corner
of
the
crt.
If
you
need
to
make
a
frequency
or
period
measurement
of
a
selected
portion
of
a
complex
waveform,
you
can
make
a
gated
measurement.
Set
up
the
Instrument
as
before
to
get
a
stable
display.
Then
use
the
following
additlonal
procedure:
Vs
2.
In
the
GATED
MEASMT
menu
select
the
desired
measurement.
Adjust
the
B
INTEN
and
A
INTEN
controls
to
provide
a
good
viewing
contrast
of
the
Intensifled
zone
that
appears
on
the
A
Sweep
trace.
Use
the
|
OR
DELAY
controt
to
position
the
Intensifled
zone
to
the
area
of
Interest
on
the
waveform
to
be
tracked.
The
width
of
the
gated
zone
Is
controlled
by
the|
control.
Adjust
the
width
to
define
the
gated
measurement
zone.
The
frequency
(or
period)
value
that
appears
In
the
upper
right
corner
of
the
crt
Is
the
value
that
occurs
within
the
zone.
Time Delay Measurement
When
using
ALT
Horizontal
Mode,
the
TIME
measurement
mode
provides
two
Intensifled
zones
on
the
A
trace.
There
are
also
two
associated
B
2247A Operators
ES
e4
too
ran