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Multitone Audio Test System
User Manual
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V
3.32
Range
Bin_Min
{Set_Bin_n}
Dist_1,{Dist_n}
Bin_Min
Bin_Min to Bin_Max (see Equation 4 and Equation 5)
float ¦ NaN + string
Unit
Defined in MEASurement[1-2]:DISTortion:UNIT
Example
:
→
→
:
Measurement1:Dist?
3/2.23E-2 V,11/8.23E-3 V,27/1.35E-2 V
Explanation
The returned distortion vector starts with the number of the first bin
≥
20Hz / the distortion up
to the first signal bin. Second pair is the number of the first signal bin / the distortion result
between this first signal bin and the second signal bin, etc. The last pair is the last signal bin /
the distortion result between this last signal bin and Bin_Max (last bin
≤
20kHz; see Fig. 20).
If a band between two signal bins is too narrow to measure a distortion, '
NaN
' is returned.
MEASurement[1¦2]:MTSinad?
Use
Returns the SINAD value using the selected Multitone signal in the full bandwidth between
Bin_Min (>20Hz) and Bin_Max (<20kHz). The single value calculation considers: Signal
plus Distortion plus Noise to Distortion plus Noise for any defined multitone signal. (see also
chapter MT-SINAD, p. 30
).
Answer
Bin_Max/
MT_Sinad
integer
float ¦ NaN & string
(see Equation 5, p. 19)
(measured MT-SINAD result & unit)
Default
NaN
(not a number)
Unit
dB
Example
:
→
→
:
Measurement1:MTSinad?
214/5.2235E+01 dB
Explanation
The returned MT-SINAD value considers all signal components, starting with the lowest
possible frequency in the signal at the first bin
≥
20Hz up to the highest frequency bin below
20kHz. It calculates from the distortions and the signal components the single SINAD value.
If a band between two signal bins is too narrow to measure a distortion, the error 246 is
returned.
MEASurement[1-2]:SELectiverss:UNIT [dBV¦V]
Use
Defines the unit in which the RSS (root sum square) selective result shall be expressed.
Range
dBV ¦ V
string
Default
dBV
Example
:
→
Meas1:Sel:Unit dBV
MEASurement[1-2]:SELectiverss? <binstart> <binstop>
Use
Returns the RSS value for the band from <binstart> to <binstop> (including both levels).
