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80 Appendix A Specifications
AirPort Extreme Card (Optional) Specifications
• Wireless data rate: Up to 54 Mbps
• Range: Up to 150 feet (data rates may vary depending on environmental conditions)
• Frequency band: 2.4 gigahertz (GHz)
• Radio output power: 15 dBm (nominal)
Compatibility
• 802.11 Direct Sequence Spread Spectrum (DSSS) 1 and 2 Mbps standard
• 802.11b 11Mbps standard
• 802.11g 54 Mbps standard
Optical Digital Audio Specifications
• Data format: Sony/Phillips Digital Interface (S/PDIF) protocol (IEC60958-3)
• Connector type: Toslink optical (IEC60874-17)
• Bits per sample: 16-bit or 24-bit
Optical digital audio out
Based on a typical situation with playback of a 1KHz, -1dBFS 24-bit sine wave, 44.1Khz
output sample rate, unless otherwise specified below.
• Output sample rate: 32 kHz, 44.1 kHz or 48 kHz
• Signal-to-noise ratio: Greater than130 dB
• Total harmonic distortion + noise: Less than -130 dB (0.00001 percent)
Optical digital audio in
Based on a typical situation with playback of a1KHz, -1dBFS 24-bit sine wave, unless
otherwise specified below.
• Fsi–input sample rate (external clock mode): 32 kHz, 44.1 kHz or 48 kHz
• Fsi–input sample rate (internal clock mode): 16 kHz to 96 kHz
• Signal-to-noise ratio (external clock mode): Greater than130 dB
• Signal-to-noise ratio (internal clock mode, 16 kHz < Fsi < 96 kHz): Less than -112 dB
• Total harmonic distortion + noise (external clock mode): Less than -130 dB (0.00001%)
• Total harmonic distortion + noise (internal clock mode, 16 kHz < Fsi < 96 kHz): Less than
-112 dB (0.0003%)