PowerBook 5300: Sound Specifications Questions & Answer

TOPIC

1. What are the total harmonic distortions from input to output?
2. What is the frequency response of the sound? peak to peak?
3. I need some information about all the other sound specifications for the Macintosh PowerBook 5300 series computers.

DISCUSSION

NOTE: Complete information on these topics is available in the PowerBook 5300 developer notes.

Question: What are the total harmonic distortions from input to output?

Answer:: Total harmonic distortion and noise is less than 0.05 percent with a 1-V rms sine wave input. The signal-to-noise ratio (SNR) is 85 dB, with no audible discrete tones.

Question: What is the frequency response of the sound? peak to peak

Answer:: 20hz to programmed value, 22Khz, 11Khz, 5.5Khz

Question: I need some information about all the other sound specifications for the Macintosh PowerBook 5300 series computers.

Answer::

Output Impedance

The Output Impedance, nominal is 32 ohms.

Frequency Response Of The Speakers

The frequency response of the speakers will be 20 Hz to 2000 Hz.

Line Level Input

Line Level is a standard in the audio field and now in the computer industry. Line level is defined as 1 volt peak to peak. Line Level provides an industry standard so that all audio and other electronic equipment can operate properly together. Most VCRs, including both home and professional audio equipment use Line Level as a standard.

Audio Input

The audio input of the 5300 Series PowerBook is specified to operate at 5.6V Peak to Peak.

Line In Impedance

Line In Impedance: 6.8K ohms

Max Input

Max Input before clipping, Singer (sound chip) gain = 0 dB is 2 Vrms, nominal 5.6 Vpp

Max Output

Max Output into 10 k ohm load 1.4 Vrms, nominal 2 V Peak to Peak. The output level will of course drop with a low impedance load like headphones; the 2 Vpp, 32 ohm Thevenin equivalent is well suited to drive headphones.

16-bit stereo

CD-quality, 16-bit stereo sound capable of driving headphones or other stereo equipment.

Analog/Digital Conversion

Digital-to-analog and analog-to-digital conversion sampled at 11.035, 22.050, or 44.100 kHz.