Mode

Resolution

Vertical refresh rate

Horizontal scan rate

 

 

(hertz)

(kilohertz)

VESA

1024 x 768

60

48.363

VESA

1024 x 768

70

56.476

VESA

1024 x 768

75

60.023

VESA

1024 x 768

85

68.677

Macintosh

1152 x 870

75

68.700

VESA

1280 x 1024

75

79.976

VESA

1280 x 1024

85

91.146

VESA

1600 x 1200

75

93.750

 

 

 

 

 

 

 

 

Audio input signals for AppleVision 850AV Display

mAccepts audio signal of up to 4 Vpp (line level–low sensitivity) or as low as 4.4 mVpp (microphone level–high sensitivity) without clipping the signal, depending upon the level and sensitivity setting

Microphone for AppleVision 850AV Display

mDirectional, optimized for use in speech recognition and other voice- related application programs

Speakers for AppleVision 850AV Display

mStereo, with ported (bass reflex) chamber design

mSpeaker SPL output: > 90 decibel (dB) SPL at 1 kHz at 0.5 meters

mFrequency response: 80 Hz to 17 kHz ± 6 dB

Spatial enhancements and 3D sound features of AppleVision 850AV speakers

mSingle channel driven by 2 Vpp, 1 kHz input at external jack

mOutput voltage at other channel > 0.38 VRMS (measured at output of spatial effect enhancement IC).

Headphone jack for AppleVision 850AV Display

mMaximum output level (2 Vpp line level input):

Into 600 ohm () load

> 0.50 volts (v) RMS

Into 10 Kilohm (k) load

> 0.55 v RMS

92Appendix B

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Image 92
Apple manual Mode Resolution, Hertz Kilohertz, Audio input signals for AppleVision 850AV Display

850AV specifications

The Apple 850AV, introduced in the early 1990s, was part of Apple's pioneering line of personal computers that showcased advanced multimedia capabilities. The 850AV served as a significant milestone in the evolution of desktop computing, emphasizing audio and video processing in an era when such features were still in their infancy.

At the heart of the Apple 850AV was its robust Apple Macintosh architecture. It was powered by a Motorola 68040 CPU, which offered enhanced performance compared to its predecessors. With a clock speed of 25 MHz, this processor enabled users to run complex applications and manage multitasking more effectively. The system came equipped with a standard RAM configuration of 4 MB, expandable to 68 MB, allowing for smoother operation of demanding software.

One of the hallmark features of the 850AV was its built-in audio capabilities, which included stereo sound output and the ability to handle digitized audio. The system came with a high-quality microphone and a CD-ROM drive, which opened up new possibilities for multimedia applications, education, and entertainment. Users could engage with educational software, listen to CDs, and even create digital audio projects—all from the comfort of their desktop.

Additionally, the Apple 850AV supported video input and output, making it one of the first computers capable of video conferencing. This functionality was facilitated by the inclusion of a video camera interface, allowing users to connect external cameras and partake in video calls and recordings. The system’s graphics capabilities were also noteworthy, supporting an impressive display resolution that enhanced the visual experience for applications and games.

The machine was built around a sleek design, showcasing Apple’s commitment to aesthetics and usability. It featured integrated speakers, a keyboard, and a mouse, all designed to create a seamless user experience. The inclusion of various ports, including USB and SCSI, allowed for connectivity with numerous peripherals, expanding the system’s versatility.

Overall, the Apple 850AV was not just a personal computer; it was a multimedia powerhouse that laid the groundwork for future innovations in computing. Its forward-thinking design and capabilities reflected Apple's dedication to enhancing user experiences and pushing the boundaries of what personal computers could achieve in the realms of audio and video.