Gentner XAP 800, Руководство по обслуживанию

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APPLICATIONS • DISTANCE LEARNING
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The sophistication and adaptability of the XAP 800 allow it to control and enhance many
conferencing applications. Following are four applications where the XAP 800 forms the
centerpiece of a high-quality conferencing system.
Applications
Introduction
Distance Learning Installation
In a typical distance learning application, the primary source of audio comes from the
instructor’s wireless microphone. For phone-add capabilities, a telephone interface (such
as the Gentner XAP TH1) would be used to transmit sound to distant sites. Secondary
audio for presentation segments can be sourced from a VCR or CD player. In larger
classroom settings, participants have desktop mics that enable everyone to hear
questions and comments.
Microphone mixing and gating parameters can be set to favor the instructor’s
microphone to facilitate effective dialogue in the room. When a particular microphone
gates on, nearby speakers can be attenuated or muted to reduce feedback. Also,
participant microphones can be set to gate off when secondary audio sources are in use.
The left and right speakers at the front of the room can be configured to provide stereo
sound from a (stereo) secondary audio source, enhancing the training experience. All
speakers can be optimized to produce full-fidelity audio by programming the XAP 800 ’s
parametric equalizers and filters accordingly.
Typical distance learning applications also require that video be transmitted. A video
codec, such as Gentner’s APV200-IP, provide high-quality video to facilitate a complete
distance learning experience.
Figure 18 shows a scenario including a wireless lapel microphone for the instructor;
desktop microphones for participants; ceiling speakers to carry voice (primary) audio and
some secondary audio; and left and right speakers at the front of the room, which carry
primary and secondary audio.