Part Number: TMS320F28P650DH
Other Parts Discussed in Thread: SFRA, C2000WARE
Hi Experts,
My customer has some confusion on the SFRA injection.
Could you please help comfirm the unit of the macro "SFRA_AMPLITUDE" ?
Customer is seeing the amplitude of the injected signal is equal to the value of the macro, instead of multiplied to the injected target.
Hi,
SFRA Amplitude and SFRA_F32_inject function argument both are in per unit format.
Here SFRA Amplitude will be contributed as Small Signal Frequency Injection as (SFRA_Amplitude *Sin (freq)) and
the SFRA_F32_inject function argument is "Ref" as per above image.
Please refer to "C2000
Software Frequency Response Analyzer (SFRA) Library User’s Guide (Rev. A)" section 3.2 for principle of operation and "C2000Ware_DigitalPower_SDK_5_xxxx\libraries\sfra\examples" for detailed information.
Typical case SFRA_Amplitude should not be "1"(As it will inject too much noise injection)
Thanks & Regards,
Shashank
