Studio Technologies M212 Digital Announcer's Console, XLR and BNC Inputs and Outputs

The Model 212 Announcer's Console is an audio control "hub" for announcers, commentators, and production personnel that features digital audio input and output resources. The broadcast-standard interfaces allow direct integration of the table-top unit into contemporary "all-digital" environments.

Two pushbutton switches—Main and Talkback—operate under microprocessor control to offer unmatched flexibility and "click-free" audio routing. The Main button controls the main output audio channel with operating modes that include push-to-mute (cough), push-to-talk, and latching. The Talkback button controls an audio channel that provides talent-oriented cue signals to production personnel. Both channels are formatted into an AES digital audio "stream" that is routed to two BNC interfaces: an AES3id-compliant output and a bidirectional digital interface for direct integration with Riedel intercom systems. For non-on-air applications a special feature set referred to as "production" mode can be enabled. Simple customization of the button labels ensures the user is presented with an easy-to-use set of controls and indicators.

Featuring a studio-inspired low-noise/low-distortion preamplifier design, adjustable gain, and 48 volt phantom power, the Model 212 is compatible with balanced dynamic and condenser microphones. A sophisticated compressor circuit controls the dynamic range of the audio signal from the microphone preamplifier to ensure the main output offers faultless performance as the on-air or other primary audio feed.

The headphone output's circuitry provides high output levels with very low distortion and noise. The user can monitor audio channels from among the three digital audio sources: the AES3id input, the bidirectional digital interface, and an optionally implemented AES3 input. Each source can be individually assigned to the left, right, or both channels of the binaural headphone output. Two rotary controls allow the user to adjust the headphone output levels.

Features:

• Microphone preamp with selectable gain and 48 volt phantom power
• Two digital audio input channels
• Two pushbutton switches offer programmable "click-free" audio path control
• Digital audio main and talkback output channels
• Digital interfaces directly compatible with unbalanced AES digital audio signals
• Bidirectional digital interface for direct integration with Riedel® intercom systems
• Stereo headphone monitoring of selectable sources
• Two rotary headphone output level controls
• Microcontroller-directed audio routing
• All configuration switches accessible via the bottom of the enclosure

Specifications:

• General Audio:
  • Frequency Response: < –0.1 dB at 20 Hz, –1 dB at 18 kHz, mic in/main out
  • Distortion (THD+N): 0.025%, measured at 1 kHz, mic in/main out
  • S/N Ratio: 71 dB, referenced to –46 dBu mic in/ –14 dBFS out
  • Common Mode Rejection Ratio: 68 dB at 60 Hz
• Connectors:
  • Mic In: 3-pin female XLR-type
  • AES3id Out, AES3id In, Bidirectional Interface: 75 ohm BNC
  • Headphone Out: ¼-inch 3-conductor phone jack 24 Vdc Power In: 2.1 x 5.5 mm coaxial power jack
• Spare Connector Locations: 2, allows one or two Neutrik NC*D-L-1 connectors to be installed (*=3F, 3M, 5F, 5M, 6F, 6FS, etc.)
• Digital Inputs/Outputs:
  • A/D, D/A Converters: 24 bit, 100 dB dynamic range
  • Sampling Rate: internal clock source 48 kHz, external clock source 32 to 96 kHz
  • AES3id In: unbalanced, transformer-coupled Impedance: 75 ohms
  • AES3id Out: unbalanced, transformer-coupled Impedance: 75 ohms
  • Bidirectional: unbalanced transformer-coupled Impedance: 75 ohms
  • AES3 In: balanced, transformer-coupled (via optional connector) Impedance: 110 ohms
  • AES3 Out: balanced, transformer-coupled (via optional connector) Impedance: 110 ohms
• Microphone Input/Preamplifier:
  • Type: electronically balanced
  • Input Impedance: 2 k ohms, nominal
  • Gain Range: 10 to 50 dB, nominal, adjustable in 10 dB steps
  • Compatibility: dynamic or phantom-powered mics
  • Phantom Power: 48 Vdc, nominal, meets IEC 61938
• Compressor:
  • Threshold: switchable –14 dBFS/–4 dBFS
  • Attack/Release Time: 2 mSec/100 mSec, nominal
  • Slope: 5:1, nominal
• Optional Line Inputs: 2
  • Type: balanced, transformer-coupled
  • Impedance: 10 k ohms, nominal
  • Nominal Level: +4 dBu
• Headphone Output: 1, binaural (stereo)
  • Compatibility: intended for connection to mono or stereo headphones or headsets with nominal impedance of 100 ohms or greater
  • Type: voltage driver
  • Maximum Output Voltage: 8 Vpp, 150 ohm load
• Auxiliary Relay:
  • Function: software configurable
  • Contacts: 2, form C (Common, Normally Closed, Normally Open)
  • Rating: 1 A, 30 W (resistive)
• Power Source: 24 Vdc nominal, 150 mA max; acceptable range 20-30 Vdc. All units include a universal input/24 Vdc output power supply.
• Dimensions (Overall):
  • 5.6 inches wide (14.2 cm)
  • 3.3 inches high (8.4 cm)
  • 8.5 inches deep (22.4 cm)
• Weight: 3.2 pounds (1.45 kg)