Studio Technologies M46A Dual 2-Wire to 4-Wire Intercom Interface

The Studio Technologies Model 46A is designed to interface 2-wire full-duplex party-line (PL) intercom circuits with 4-wire audio circuits associated with matrix intercom systems. Other specialized audio system interfacing applications can also be supported. The Model 46A provides two independent full-featured 2-channel interfaces. Each interface contains two hybrid circuits which include automatic nulling capability. The analog circuitry, under software control, provides excellent audio quality and high return-loss. The interfaces are compatible with powered and unpowered 2-wire party-line circuits. They are capable of supplying DC power, allowing direct operation of devices such as user beltpacks. Configuration settings allow the 2-wire and 4-wire interface circuitry to be compatible with a range of nominal signal levels. Audio level meters provide user confirmation of system performance during setup and operation. Applications for the Model 46A include television sports and special event broadcasting, theme park and theater installations, corporate events, and industrial testing environments. Standard audio connectors are used for all input and output signals. The Model 46A mounts in one space of a standard 19-inch rack enclosure and requires 100-240 V, 50/60 Hz for operation.

Studio Technologies Model 46A Features:

• Two 2-channel party-line intercom interfaces
• Four analog hybrids with auto null capability
• Input and output level metering
• Excellent audio quality
• Integrated intercom power sources
• Standard audio connectors
• Transformer-coupled 4-wire inputs and outputs
• Universal input mains powered

Studio Technologies Model 46A Specifications:

• General Audio:
  • Frequency Response: 100 Hz - 8 kHz, ±2dB
  • Distortion (THD+N): Less than 0.5%, measured at 1 kHz, 4-wire input to 2-wire interface pin 2
  • Signal-to-Noise Ratio: Greater than 55dB, measured at 1 kHz, 4-wire input to 2-wire interface pin 2
• Connectors:
  • Inputs from 4-Wire: 3-pin Female XLR
  • Outputs to 4-Wire: 3-pin Male XLR
  • 2-Wire Party-Line Intercom: 3-pin Male XLR
  • Remote Control: 10-pin header, requires optional 10-pin ribbon connector assembly
  • AC Mains: 3-blade, IEC 320 C14 (mates with IEC 320 C13)
• 2-Wire Party-Line Intercom Interfaces
  • Total: 2
  • Type: 2-channel party-line (PL), unbalanced (pin 1 common; pin 2 channel 1 audio or DC with channel 1 audio; pin 3 channel 2 audio)
  • Compatibility: Single- and 2-Channel intercom systems such as from RTS and ClearCom
  • Impedance, External Power MOde: >10 kOhms
  • Impedance, Internal Power Mode: 200 Ohms
  • Nominal Level: -10 or -14dBu, selectable
  • "Mic Kill" Signal: Square wave, 24 kHz ±1%
  • Internal Power Source: 30 Vdc nominal, 315 mA maximum

Note

NOTE: For further specifications on this product, please refer to the attached Data Sheet under the Documentation Tab