VOLTAGE CONTROLLED MIXER – VCM-28

DESCRIPTION:

It is a voltage controlled mixer with remote operation. It is having 15 identical channels and the channels are tuned for the Shure mic SM48/SM58. Each channel is balanced in nature for noise free pickup. The special circuit with digital technology makes the switching without any noise. The channel level can be adjusted from the front for mic or line input without changing the input jacks. The output is available in two levels. The mixer can be cascaded with another mixer using the mixer bus, which is provided at the rear of the equipment. The output level is indicated by a 5 LED array as well as can be monitored by a headphone an LED indication is provided at the front to show the status of the mic whether the microphone is ON or OFF. The switing logic is taken out through 36 pin ceotronics connector which is suitable for Sonic GMFB-100. The equipment is made out of Aluminums channel chassis for less RF interference. The equipment occupies 1 U size in 19 inch rack. It also uses the toroidal transformer for improved S/N ratio.

TECHNICAL SPECIFICATIONS:

T.E.I.N. (DIN Audio)

MIC lnput, 150 Ohms source: -128.5dB

LINE lnput, 10 Ohms source: -98.5dBm

T.H.D and NOISE: <0.08%

FREQUENCY RESPONSE +0-1dB

0dBm, 600 Ohms MIC input to L/R output:

25 Hz to 19 KHz

IMPEDENCE

MIC input : Typically 2K Ohms

LINE input : 20K Ohms (balanced)

10K Ohms (balanced

L/R output : <50 Ohms

MAXOMUM GAIN

MIC input to L/R output: 76dB

LINE input to L/R output: 55dB

NOMINAL OUTPUT LEVEL: 0dBm

MAXIMUM OUTPUT : +17dBm (5.5V RMS)

VOLTAGE VONTROLLED MIXER – (VCM-28)

FEATURES:

VCM-28 is one among the special featured analog audio processor for distributing the audio signals for long distances without introducing electromechanical noise pickup. The frequency response is also maintained as original.

Special toroidal transformer is used to improve the signal to ratio noise.

Voltage controlled amplifiers (VCA) are introduced in the audio chain to increase or decrease the audio level without introducing the carbon track noise of rotary control.

Inputs and outputs through Stereo 1/4 inch phono connectors.

SPECIFICATIONS:

Line input Imp : 10 Kohm

Line gain range : 0 to + 20 db

Freq response : 50Hz to 15KHz

Output Impedance : 200 ohm

Output Over Drive : 24 dbv

THD + Noise : < 0.02%

S/N Ratio : > 85db

AUDIO PROCESSOR CHANGOVER VCM - 28C

FEATURES:

Sonic M85 changeover / VCM-28C are one among the special featured analog audio processor changeover for distributing the audio signals for long distances without introducing electromechanical noise pickup. The frequency response is also maintained as original.

Basically it changes the main and standby audio processor inputs and outputs through relay.

Our Wireless Interface WI - 200 / Audio Processor Mixer APC - 82 / Voltage Controller Mixer VCM - 28 can be connected to the mixer changeover for additional features.

9 Pin D Type Connector for remote operation through CHINTCO.

SPECIFICATIONS:

Line input Imp : 10 Kohm

Line gain range : 0 to + 20 db

Freq response : 50Hz to 15KHz

Output Impedance : 200 ohm

Output Over Drive : 24 dbv

THD + Noise : < 0.02%

S/N Ratio : > 85db

INTERPRETER MONITORING SYSTEM-(IMS – 200)

FEATURES:

Monitoring system of interpretation system

The system comprises of two sub-systems

• Audio

• Time-log

Audio

The audio from the floor and the audio from the interpreter unit can be recorded in our digital recording system by left and right channels respectively for every ten minutes with overlap of 2 minutes automatically.

Time-log

There are 3 methods of time loging.

SPECIFICATIONS:

The system elements for the above method are:

1. Computer for each language - 4 in

case of Lok Sabha

2. Audio recording software- Digi-pro

1.4 - 4 nos.

3. Delegate units - 6 nos.

4. DPS-200 -1 no.

5. System computer -1 no.

6. A9 Cable -50 meter.

7. Print out software - 1 no.

8. Printer LQ-1050 - 1 no.