Apple Mac Pro Computer Manuel d'utilisateur télécharger pdf (Page 74)

74 Appendix A Specifications

Analog Audio Specifications

Â Sample rate: 44.1 kHz, 48 kHz, or 96 kHz

Â Jack type: 1/8” mini

Â Bits per sample: 16-bit or 24-bit

Â Frequency response: 20 Hz to 20 kHz, +0.5 dB/-3 dB

Analog audio out using the headphone jack (typical values)

Based on a typical situation with playback of 1 kHz, -3dBFS 24-bit sine wave, 44.1 kHz

output sample rate into 150 ohms unless otherwise specified below.

Â Output voltage: 1.4 volts (root mean square) (V

rms

) (+5.1 dBµ)

Â Output impedance: 24 ohms

Â Output power: 90 milliwatts (mW)

Â Signal-to-noise ratio: Greater than 90 dB

Â Total harmonic distortion + noise: Less than -75 dB (.01 percent)

Â Channel separation: Greater than 50 dB

Analog audio line in (typical values)

Based on a typical situation with playback of 1 kHz, -3dBFS 24-bit sine wave, 44.1 kHz

output sample rate unless otherwise specified below.

Â Maximum input voltage: 2 V

rms

(+8.2 dBµ)

Â Input impedance: Greater than 20 kilohms

Â Signal-to-noise ratio: Greater than 90 dB

Â Total harmonic distortion + noise: Less than -85 dB (.006 percent)

Â Channel separation: Greater than 80 dB

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Apple Mac Pro Computer Manuel d'utilisateur Page 74