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  Master Console
 
 
This is the Master Equipment with which the instructor can control the operation of the Language Lab System.
  It Consists of :
(a)
Announcement to any , a group , or all classrooms
(b)
Replaying recored lessons / speeches to classrooms
(c)
Contacting the class teacher and getting back information
(d)
Recording of classrooms conversation for enforcing discipline
(e)
Recording of teacher's lecture so as to enable the teacher to overcome deficiencies in his / her teaching method
 
The sailent features of system DSB are :
DSB is based on Digital Switching Technology, unlike electro-mechanical in conventional school broadcast systems . This makes the system very compact easy to manage and maintain. DSB has the unique feature of permitting announcement to be made from other locations such as the reception or vice principal's office. For this only an extension Communication Instrument is required rather than replication of the entire school broadcast console as in the case of a conventional system.
 
DSB is capable of operating in three modes
1.
Monitor Mode - for the principal to listen to the classroom conversation.
2.
Address Mode - for the Principal or any other designated person to make announcement system.
3.
All call Mode - to address or playback recorded message to all the rooms in the school building.
DSB has a modular design and there fore estending the system for covering additional classrooms at a later date is vey simple.
 
SPecifications
Power required
AC 220-240.
Headphone Power hading
500 MV
Headphone Impedance
32 ohm
MIcrophone Type
Condenser
Microphone Sensitivity
3MV/PA
 
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