The master control access station provides individual access to four talent channels, and "ALL IFB" access to all the IFB channels in the system. It contains the audio line-driver circuits. One MA-704 is required at each talent access control location. It is designed for stand-alone operation or for direct console mounting.
Technical Specifications
Panel Microphone Input
Input Type: Electret
Input Impedance: >=2KΩ
Mic Limiter Threshold: 0dB ± 3dB
Mic Limiter Range: >= 15dB
Program Line Input
Maximum Level before Clipping: >= 20dBu
Input Impedance: >= 5KΩ
Frequency Response
Panel Mic - Talent: 200 - 18KHz ± 3dB
Program Input - Talent: 200 - 18KHz ± 3dB
Extension Line - Talent: 200 - 18KHz ± 3dB
Max Distortion
Panel Mic - Talent: <= 0.5%
Program Input - Talent: <= 0.1%
Extension Line - Talent: <= 0.1%
Noise
Panel Mic - Talent: < -65dBu
Program Input - Talent: < -85dBu
Extension Line - Talent: < -85dBu
Max Gain
Panel Mic - Talent: >= 30dB
Program Input - Talent : >= -14dB
Extension Line - Talent: -14dB ± 3dB
Min Gain
Panel Mic - Talent: <= 40dB
Program Input - Talent: <= -45dB
Power
Input Voltage Range: 20-30 VDC
Input Current (Idle): <= 140mA
Input Current (Max): <= 180mA
Rear Panel Connectors and Controls
IFB Input: (1) XLR6F
IFB Extension: (1) XLR6M
Extension Bus Out: (1) 1/4 jack
External Line In: (1) 1/4 jack
Mic Gain: (1) Gain adjust
Front Panel Controls & Indicators
(5) Talk buttons
(1) 1/4 microphone jack socket
Environmental
32 - 122˚F (0 - 50˚C)
Dimensions
1.75 in H.x 6.3in W x 5.5in D
(44.5mm x 160mm x 139.7mm)
Weight
1.71 lbs. (.78kg)
