Studio-technologies 50 2000 Bedienungsanleitung PDF herunterladen (Seite 18)

Issue 4, July 2000 Model 50/51 User Guide

Page 18 Studio Technologies, Inc.

External Communications Switches

Sleeve

(Ground)

Tip (Talk to studio)

Ring (Talk to phones)

(Switchcraft No. 297, Neutrik NP3C, or equivalent)

Tip

(+12Vdc)

Sleeve

(Ground)

Mic Module Input

Ring (Communications

Audio Input)

(Switchcraft No. 297, Neutrik NP3C, or equivalent)

While the Model 51s talk to studio and

talk to phones buttons can be configured

to latch, the remote control inputs are

always push to activate. This is provided

as a safety feature preventing an external

user from latching one of the functions

to the on state.

Mic Module Input

The Model 51 Control Console contains

a microphone which provides the audio

source for the Model 50s communications

functions. In special applications the

Model 51 may not be used, and a sepa-

rate source of communications audio will

be necessary. The Mic Module input on

the back panel of the Model 50 allows the

Model 71 Mic Module to be directly con-

nected. The Model 71 consists of a small

enclosure, about the size of a personal-

computer mouse, containing a micro-

phone and preamplifier. Contact Studio

Technologies for further details about the

Model 71.

Even if you are using the Model 51 Control

Console you may want to provide an

alternate source of communications audio.

To use your own microphone and

preamp, directly connect it using the Mic

Module input jack. The Mic Module input

is a ¼-inch 3-conductor phone jack with

+12Vdc on tip, audio input on ring, and

ground on sleeve. The audio input re-

quires a nominal 10dBu signal (10dBu,

not 10dBV!). The +12Vdc on the tip is

from the same source that powers the

Model51, and is provided to power the

Model 71 Mic Module. If you feel the urge

to use this power source, be aware that it

only provides 110 milliamps of current of

which the Model 51 needs about 100mA.

So go ahead and use all the current you

need, as long as it doesnt exceed 10mA!

Note: Communications audio from the

Model 51 is routed into the Model 50s

circuitry through the normal connection on

the ring contact of the Mic Module input

jack. When a phone plug is inserted into

the Mic Module input, the audio path from

the Model 51 to the Model 50 is broken.

This means you cant use the Model 51s

microphone and the Mic Module input at

the same time.

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