RTS RMS300 Especificações descarregar pdf (Página 7)

CHAPTER 2

INSTALLATION

MECHANICAL INSTALLATION

The Model SPK300L Portable Speaker User Station is 4.0 inches (101.6 mm) high X 8.0 inches (203.2 mm) wide X 8.0 inches

(203.2 mm) deep. Additional depth should be allowed for the rear panel XLR-type line connectors. When installing this unit,

allow space for control access, cabling and servicing. Provide space for: cabling service loops, reaching XLR-type connector

lock releases, and headset connector/cables. If the headset connector is remotely located, allow space between this cable and

interference sources such as video/TV monitors, power supplies and equipment with internal power supplies. There are no

ventilation requirements.

Headset Requirements

Dynamic microphone headset type:

•50 to 1000 ohm microphone

•25 to 1000 ohm headphone(s)

High efficiency headphones are recommended because less line current is required from the power supply. Use headphones

with an impedance of 25 ohms or greater. Low impedance 8 ohm headphones are not recommended. Headphones with good

acoustic isolation (20 to 40dB) improve communication in high ambient noise environments, and allow the user to use the

headphones at a less tiring, lower volume.

In the headset connecting cable, prevent coupling between the microphone and headphone leads by using a shielded, twisted

pair for the microphone, and a separate, twisted pair for the headphones. Do not allow headphone ground to contact micro-

phone ground or shield. Tie the shield to microphone ground or "mic low". The headset cable can be made longer when the

microphone and headphone pairs are physically separated. The wider the separation, the longer the cable length which may be

used. Estimated maximum usable headphone cable lengths are as follows:

Single cable,

Two shielded twisted pair 10 ft. (3 m).

Dual ribbed cable,

Two shielded twisted pair: 30 ft. (9 m).

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RTS RMS300 Especificações Página 7