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Table
3.4
- Period
Measurement
2.
Select
PERIOD A
using
FUNCTION
keys@.
3.
Set the
AC/DC
coupling
(jesG)
and
input
impedance
(tef)
as required.
4.
Select the
X10
input
attenuation
(i6D)
if
desired.
Attenuation
setting
is
automatic
in
the
Auto-Trigger
mode.
5.
Connect
the
measurement
signal to
INPUT A
(n)
.
PERIOD
B
may
be
measured
to 10 ns
resolution using Special
Function
21.
6.
Select a
specific
gate
time
(valid
range of 200 ps
to
99.9
s)
if
desired.
For
small
numbers,
enter the
gate time
using the exponential
format.
The
displayed gate
time
will
be rounded
to
the nearest 25.6
us.
Use key
sequence
<
value>
SHIFT
(i6f)
STORE
(jew)
GATE
(iso)
.
Programmed
gate
times
are
immediately enabled
with the
resolution set
accordingly.
Skip
step
7
if
step
6
is
being
used
to
enter the gate time.
7
.
Use
the
RESOLUTION
!
f
keys
(jP)
to
select the required display resolution
and gate time
if
step
6
was
not used
(see
Table
3.12).
8.
Select
AUTO-TRIG
(jei)
,
or set the trigger level
manually
using
key
sequence
TRIG-LEVEL
(me)
+/-
(js2)
<value>
TRIG-LEVEL
(5
b)
.
Check
that Input
A
TRIG
LEVEL
LED
(W)
flashes.
9.
If
a
frequency below
50
kHz
is
to
be measured
in
the
presence
of high
freq-
uency
noise, select
FILTER
(
53
)
.
10.
If
external arming/gating
is
needed, connect
the
arming/gating
signal
and
enter
the required special
function
number.
Enable
special functions.
Refer
to
Subsection
3.4.8
for
special function
numbers
and procedures.
3-22
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