Table of Contents
Advertisement
Table
3.1
-
Front Panel
Controls,
Indicators,
and Connectors
(Cont'd)
Reference
Item
|
Function/Description
FREQ
C*
Input
C
Frequency
(Option
41)-measures
frequencies
to
1.3
GHz
with
a
resolution
of
at least
9
digits in
1 s
at
any
freq-
uency
H9I
PERIOD
A*
Input
A
Period-
measures
periods
from
6.25 ns to
1.7 x
10
3
/s,
with up
to 9-digits
resolution
per
second
of
measurement
TI
A
B*
Time
Interval
(Input
A
for start,
Input
B
for stop). Intervals
from
-2
ns to
1
x 10
5
/s
can
be
measured.
When
in
COM
A
mode,
the
measurement
signal
applied
to Input
A
is
directed
to
both
Input
A
and
B
amplifiers
m
TOTAL A
by
B*
Totalize
(Input
A
events gated by
Input
B).
Input
A
can
totalize
events
at
a rate
up
to
1
x
10
8
/s.
A
positive slope
selection
on
Input
B
starts positive,
stops
negative,
and
vice-versa
RATIO
A/B*
Ratio
A/B
(Ratio
of
Frequency
A
to
Frequency
B),
with
frequency range
of
DC
to
100
MHz
RATIO
C/B*
Ratio
C/B
(Ratio
of
Frequency
C
to
Frequency
B)
(141)
RISE/FALL A*
Selects Rise/Fall
Time
for
Input A,
depending on
the trigger slope
condition. Input
A
Rise
Time
(positive
slope;
10%
start
and
90%
stop trigger
points).
Input
A
Fall
Time
(negative
slope;
90%
start
and
10%
stop trigger
points).
Default state
is
Rise A.
Chang-
ing either Input
A
or
B
trigger slope
automatically changes
the other input
and
sets the
counter
to Fall A.
Minimum
frequency
is
50
Hz
(ui)
PULSE
WIDTH A
1
i
|
Input
A
Pulse Width. Default state
is
Positive Pulse
Width
(positive start
slope,
negative stop
slope,
50%
trigger
points).
Changing
either Input
A
or
B
trigger slope
automatically changes the
other
input
and
sets the
counter
for
Negative
Pulse
Width
(negative start
slope,
positive stop
slope,
50%
trigger
points).
Minimum
frequency
is
50
Hz
___
i
3-9
Advertisement
Table of Contents
