This attribute specifies the format of the data returned in the upstream spectrum sample capture file and in the Output attribute of the Results table. The CCAP MUST be capable of reporting upstream spectrum sample FFT input data in complex time-domain in-phase and quadrature (I/Q) format. The enumeration value for complex time-domain I/Q format is timeIQ. The CCAP MUST use 4 bytes per upstream spectrum sample to represent the data when reporting in complex time-domain I/Q format. The CCAP MUST be capable of reporting upstream spectrum sample FFT output data in power format. The enumeration value for power format is fftPower. The CCAP MUST use 4 bytes per bin to represent upstream spectrum sample FFT output data when reporting upstream spectrum sample data in power format. The CCAP MAY be capable of reporting upstream spectrum sample real FFT input data in raw analog-to-digital converter (ADC) output format. The enumeration value for raw ADC output format is rawAdc. The CCAP MUST use 2 bytes per upstream spectrum sample to represent the data when reporting in raw ADC output format. The CCAP MAY support reporting of upstream spectrum sample FFT output data in I/Q format. The enumeration value for I/Q format is fftIQ. The CCAP MUST use 4 bytes per bin to represent FFT output data when reporting upstream spectrum sample data in I/Q format. The CCAP MAY support reporting of upstream spectrum sample FFT output data in amplitude format. The enumeration value for amplitude format is fftAmplitude. The CCAP MUST use 2 bytes per bin to represent upstream spectrum sample FFT output data when reporting upstream spectrum sample data in amplitude format. The CCAP MAY support reporting of upstream spectrum sample FFT data in dB format using units of hundredths dB. The enumeration value for spectrum amplitude format is fftDb. The CCAP MUST use 2 bytes per bin to represent upstream spectrum sample FFT output data when reporting in dB format. The CCAP MUST reject any attempt to set OutputFormat to an optional value not supported by the CCAP.