Black Box ACU3009A Specifications download pdf (Page 32)

CHAPTER 6: Installation

6.2.1 S

PECIAL

ONCERNS

BOUT

ONNECTING

UDIO

EVICES TO THE

KVM/S

ERIAL

UDIO

ICRO

XTENDER

Before you connect any sound equipment to the KVM/Serial/Audio Micro

Extender, here are some things you should keep in mind:

The Extender’s audio interface is stereo, bidirectional (sound can be transmitted

in both directions across the link at the same time), and line-level (it supports

devices that transmit and receive at up to 5 volts peak-to-peak). In the output (“line

out”) direction, it’s designed to take the output from a computer’s sound card or

other line-level source and send it to a set of powered speakers at the remote site.

In the input (“line in”) direction, it’s designed to take input from a microphone at

the remote site and send it to a local sound card or other line-level destination. It

can also send signals in the opposite directions (for example, sound from a remote

source to local speakers, or from a local microphone to a remote recorder),

although a local microphone would have to be self-amplified and would have to

output signals at line level. The Extender’s audio connectors are labeled on the

top of each Unit’s case with a speaker icon and the words “Out” (above the audio-

out port) and “In” (above the audio-in port).

• To attach headphones or powered speakers: Plug the headphones or speakers

directly into the Local or Remote Unit’s audio-out connector. Run a standard

3.5-mm mini stereo audio cable such as product code EJ110-0010 from the

audio-in connector of the Remote or Local Unit at the other end of the link to

the “LINE OUT” connector of a PC or sound card—colored lime (yellow-

green) in the PC99 specifications, but often colored differently—or of a CD

player or other audio source.

• To attach a microphone that the sound card will be amplifying (the preferred

type of microphone attachment): Plug the microphone directly into the

Remote Unit’s audio-in connector. Run a standard 3.5-mm mini stereo audio

cable such as product code EJ110-0010 from the Local Unit’s audio-out

connector to the sound card’s “MIC” (“microphone in”) connector (colored

pink in the PC99 specifications, but often colored differently).

To attach a self-amplified microphone, CD player, etc.: Plug the device

directly into the Local or Remote Unit’s audio-in connector. Run an audio

cable such as EJ110-0010 from the audio-out connector of the Remote or Local

Unit at the other end of the link to the “LINE IN” connector of a PC’s sound

card—colored light blue in the PC99 specifications—or of a tape recorder or

other audio destination.

To attach a microphone that the Extender will have to amplify itself: Set the

Extender’s MIC jumper as described in Section 5.3. Plug the microphone

directly into the Remote Unit’s audio-in connector. Run an audio cable such

as EJ110-0010 from the Local Unit’s audio-out connector to the sound card’s

“LINE IN” connector (colored light blue in the PC99 specifications).

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Black Box ACU3009A Specifications Page 32

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