MoniSwitchtm

STEREO AUDIO SWITCHER

Product Description

Digital audio processors often introduce a time delay into the transmitted signal of a broadcast station.  This delay creates an audible echo, which is very distracting to talent monitoring the station with headphones.

MoniSwitch is a specialized audio switcher that solves this echo problem by eliminating the time delay in the studio monitor system.  MoniSwitch has two stereo inputs and one stereo output.  One of the inputs receives audio from stationâs off-air demodulator.  The second input is fed with real-time audio, e.g., the Program bus of the console, the output of an analog processor, or the ãlow-delayä Monitor output from the on-air processor.    

The output of MoniSwitch is fed to the ãAir Monitorä input of the console.  The unitâs Control Input is interfaced to the consoleâs ãmic tallyä output, so that it senses when the studio mic is in use. 

When the mic is off, the off-air signal is heard through the monitor system. When the mic is turned on, MoniSwitch automatically switches to the real-time audio signal, which is free of echo and other delay artifacts.  

Electronic audio switching is used to create a smooth transition between the off-air (A) and real-time (B) audio.  LEDs indicate which input is active. Gain trims for all inputs allow levels to be closely matched.  Any maintained contact closure (or DC voltage) will switch the unit from the A to the B input.  With no closure, the A input is selected by default. Audio connections are via barrier strip; control logic is via mini-TRS jack.

Technical Specifications

Input Level                     -10 to +8 dBm
Input Impedance            20K ohms bal, 10K ohms unbal
Output Level                  +4 dBm nominal, +24 dBm max
Output Load                  600 ohms or higher per chan, bal
Gain                             -10 to +10 dB
Frequency Response            DC-20 kHz, +/- 0.25 dB
Distortion                      <.01% IM/THD
Noise                            >80 dB below nominal output
Control Input logic            Maintained contact closure or 5-24 vdc
Power Requirements            115/230 VAC, 50/60HZ, 3W
Construction                  Aluminum enclosure and front panel
Physical                        6.25äw x 3.75äh x 2.25äd; 2lbs

Technical specifications subject to change without notice.

 
RETURN TO HOMEPAGE © Copyright 2009, Henry Engineering