HP 54501A - Frequency

FREQuency
FREQuency
command/query
The :MEASURE:FREQUENCY
command
places
the
instrument
in the
continuous
measurement
mode
and
starts
a
Frequency
measurement.
The
FREQUENCY
query
measures
and
outputs
the
frequency
of
the first
complete cycle
on screen
using
the 50%
levels
when
Standard
measurements
are
selected and
the
mid threshold
value
when
User
Defined
measurements
are
selected.
The
algorithm
is:
if
first
edge
on screen
is
rising
then
frequency
=
l/(time
at
second
rising
edge
•
time
at
First
rising
edge)
else
frequency
=
l/(time at second
falling
edge
•
time
at
first
falling
edge)
Command Syntax:
:MEASure:FREQuency
Example:
OUTPUT
707;":MEASURE:FREO"
Query Syntax:
:
MEASURE:
FREQuency?
Returned Format:
[:MEASure:FREQuency] <
value
>
<NL>
Where:
<
value
>
::
=
frequency
in
Hertz
(exponential
-
NR3
format)
Example:
DIM
Frq$[50]
OUTPUT 707;":MEASURE:FREQUENCY?"
ENTER
707;
Frq$
PRINT
Frq$
HP
54501A
Programming
Measure
Subsystem
14-25