YOKOGAWA WT3001E, Руководство пользователя, Страница: 62 / 179

6-18
IM WT3001E-17EN
:ACQuisition:LENGth?
Function Queries the total number of points of
the waveform sampling specified by
“
:ACQuisition:TRACe
.”
Syntax
:ACQuisition:LENGth?
Example
:ACQUISITION:LENGTH? -> 100000
Description • When the measurement mode is MATH, the
number of data is determined by the data
update interval (
:RATE
) setting.
length = rate(sec) × 200000
• When the measurement mode is FFT, the
number of data is determined by the setting
for the number of FFT computation points
(
:DISPlay:FFT:POINt
) as follows:
(1) When “
:ACQuisition:TRACe
” is
FFT<x>
length = point/2+1 = 10001 or 100001
(2) When “
:ACQuisition:TRACe
” is not
FFT<x>
length = point = 20000 or 200000
• In a mode other than MATH or FFT, an error
occurs since there is no acquisition data, and 0
is returned.
:ACQuisition:SEND?
Function Queries the waveform sampling data specified by
“
:ACQuisition:TRACe
.”
Syntax
:ACQuisition:SEND?
Example • When “
:ACQuisition:FORMat
” is set to
{ASCii}
:ACQUISITION:SEND? ->
<NR3>,<NR3>,...
• When “
:ACQuisition:FORMat
” is set to
{FLOat}
:ACQUISITION:SEND? -> #8
(number of
bytes, 8 digits)(data byte sequence)
Description • The format of the waveform sampling data
that is output varies depending on the
“
:ACQuisition:FORMat
” setting as follows:
(1) When “
ASCii
” is specified
The physical value is output in the <NR3>
format. The data of each point is delimited by a
comma.
(2) When “
FLOat
” is specified
The physical value is output in IEEE
single-precision floating point (4-byte) format.
The output byte order of the data of
each point follows the order that is set
using the “
:ACQuisition:BYTeorder
”
command.
• This instrument outputs the waveform
sampling data in the range specified by
“
:ACQuisition:{STARt|END}
.” However,
data exceeding the waveform sampling data
range, 0 to (the total number of data points – 1),
is not output.
• This command is valid when the measurement
mode is set to MATH or FFT and the waveform
sampling data is held inside this instrument
(
:ACQuisition:HOLD ON
). Otherwise, an
error occurs, because there is no waveform
sampling data. The output is as follows:
(1) When “
ASCii
” is specified
Outputs NAN.
(2) When “
FLOat
” is specified
Outputs #800000000.
:ACQuisition:SRATe?
Function Queries the sampling rate of the retrieved data
Syntax
:ACQuisition:SRATe?
Example
:ACQUISITION:SRATE? -> 195.312E+03
Description This command is valid when the measurement
mode is set to MATH or FFT. Otherwise, an
error occurs (returns NAN), because there is no
waveform sampling data.
:ACQuisition:STARt
Function Sets the output start point of the waveform
display data that is transmitted by
“
:ACQuisition:SEND?
” or queries the current
setting.
Syntax
:ACQuisition:STARt {<NRf>}
:ACQuisition:STARt?
<NRf> = 0 to 3999999
Example
:ACQUISITION:START 0
:ACQUISITION:START? ->
:ACQUISITION:START 0
Description Set the point in the range up to (the total
number of data points – 1). The total
number of data points can be queried using
“
:ACQuisition:LENGth?.
”
:ACQuisition:TRACe
Function Sets the target trace of “
:ACQuisition:SEND?
”
or queries the current setting.
Syntax
:ACQuisition:TRACe {U<x>|I<x>|
SPEed|TORQue|MATH<x>|FFT<x>}
:ACQuisition:TRACe?
<x> of U<x>, I<x> = 1 to 4 (element)
<x> of MATH<x> = 1 to 2 (MATH)
<x> of FFT<x> = 1 or 2 (FFT)
Example
:ACQUISITION:TRACE U1
:ACQUISITION:TRACE? ->
:ACQUISITION:TRACE U1
Description
{SPEed|TORQue}
are valid only on models with
the motor evaluation function (/MTR option).
6.2 ACQuisition Group