M712 — Intercom Matrix Switching Board

THE WARD-BECK SYSTEMS 7000 Series solid-state Intercom Systems are designed to provide inter- communication between production and technical staff within a broadcast or production complex: Modular construction enhances the flexibility of the available configurations. 1 ) M7012 ~ 12 input, 12 output configuration with to 144 crosspoints (expansion capability to 12 x 16 with 1 to 192 crosspoints) . Requires 8 rack units of space.

2) M7024 24 input, 24 output configuration with to 576 crosspoints. Requires 14 rack units of space. Various capacity systems are conveniently assembled by re-arranging the modular components. The 7000 series Intercom Systems comprise centrally located amplifier and switching equipment which is remotely controlled from passive control stations situated in the appropriate personnel areas: The concept features entirely balanced circuitry for improved crosstalk and minimum transient and RF degradation: The system utilizes latest state-of-the-art operational amplifier techniques with solid-state balanced crosspoints and integrated circuit amplifier designs: Optimum efficiency in packaging is achieved by use of one MF7 frame type which accommodates the basic amplifier and crosspoint modules.

12 M703 inputloutput amplifier modules or 24 M712 cross- point modules may be accommodated in the 5-1/4 in. high (3 rack units) , standard 19 in. rack mounting MF7 equipment frame. The sophistication of the system may be expanded as required through the use of WBS 600 series power amplifiers and distribution amplifiers for higher listening levels and multiple output distribution: The inherent flexibility of the 7000 series system permits convenient integration of the facility with any existing system: In addition, the basic modules will accommodate dynamic or carbon micro- phone inputs from various sources or any make of camera equipment

(only shared text)

Also: general boilerplate (9 devices) · general boilerplate (9 devices) · general boilerplate (9 devices)

(only shared text)

Also: general boilerplate (10 devices) · general boilerplate (10 devices) · general boilerplate (10 devices)

PREAMPLIFIER SECTION (M7O1) GAIN: 80dB (Max.) + 2dB FREQUENCY RESPONSE: + IdB 100 Hz to 1OkHz NOISE: Equivalent to 122dBm relative input noise TOTAL HAR- MONIC DISTOR- Less than 1% measured at +18dBm TION: output INPUT: 60dBm; 150 ohms balanced (conditional strapping determines dynamic or carbon source) OUTPUT: +8dBm, 600 ohms balanced (+18dBm Max.) COMPRESSION: 25dB range (may be switched out) POWER +24 to 36 volts dc unregulated.

REQUI REMENTS: 35mA approx: M712 1 x 12 Crosspoint mother board GAIN: Unity (+6dB pre-set control incor- porated FREQUENCY RESPONSE: + 0.5dB 50Hz to 10kHz NOISE: S/N better than 7OdB measured from +8dBm TOTAL HAR- MONIC DISTOR- Less than 0.5% measured at TION: +18dBm INPUT: +8dBm nominal (+18dBm Max:) balanced from direct line or from M703 preamplifier INPUT IMPEDANCE: 30k ohm balanced bridging OUTPUT: OdBm to +8dBm nominal (+18dBm Max: ) CROSSPOINT ISOLATION/CUT OFF: 1OOdB TURN ON/OFF TRANSIENT: Inaudible POWER REQUIREMENTS: 24 volts dc regulated 15mA POWER AMPLIFIER SECTION (M702) GAIN: 35dB (Max:) + 2dB FREQUENCY RESPONSE: + IdB 100 Hz to 8kHz NOISE: S/N better than 75dB measured from 3W output TOTAL HAR- MONIC DISTOR- Less than 15% measured at 3W TION: INPUT: OdBm to +18dBm, 600 ohms balanced from crosspoint matrix OUTPUT: 3 Watts directly into 8 ohms (not balanced) COMPRESSION: POWER +24 to 36 volts dc unregulated, 25mA REQUI REMENTS: (quiescent), 30OmA (at Max.

output)

M712 GAIN: Unity (#6dB pre-set control incorporated) FREQUENCY RESPONSE : 1 0 . 5dB 5OHz to 10kHz NOISE : S/N better than 7 0aB measured from +8dBm TOTAL HARMONIC DISTORTION : Less than 0.58 measured at +18dBm INPUT : +8dBm nominal (+18dBm Max . ) balanced from direct line or from M703 preamplifier INPUT IMPEDANCE : 30k ohm balanced bridging OUTPUT : OdBm to +8dBm nominal (+18dBm Max.

) CROSSPOINT ISOLATION/CUT OFF : 100dB TURN ON/OFF TRANSIENT : Inaudible POWER REQUIREMENTS : 24 volts dc regulated 15mA