Frequency - HP 54501A Programming Reference Manual

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