Comrex DH30

$1,795.00
Availability:
Available

DH30 Single Digital Hybrid with Acoustic Echo Cancellation for North America


DH30 Overview

With the variety of phone systems in the world today, it is becoming increasingly difficult to have all callers sound the same on-air. To help bring uniformity and high quality sound to a broadcast talk show environment, we have created the DH30. The DH30 provides a high quality interface between a standard telephone line and your audio equipment.

Designed with both AES/EBU and analog inputs and outputs, the DH30 can interface with the latest digital and analog consoles. To ensure quality sound in studios that have open speakers and microphones, the DH30 was created with an acoustic echo cancellation feature.

The DH30's digital signal processing (DSP) has multiple adjustable parameters to provide you with the best send and caller audio signals. New audio processing features such as the compressor and downward expander functions ensure that the best audio reaches your audience. All audio processing features are programmable via the front panel controls. For the deepest, most reliable hybrid null, and the best quality caller audio for your application, the DH30 is the answer.

Easy to use and install, the DH30 has simple front panel controls and remote control capability. These controls put the On, Off, Rec, and Cue functions right at your fingertips. The DH30 also includes a 2W monitor amp with volume controls right on the front panel. The Rec function sends a start/stop signal to your external recording device. The Cue function allows you to control which audio signal should be sent to the caller, allowing you to switch from the Send input to the Cue input at the touch of a button.

 

DH30 Features

  • Remote controllable presets
  • Password protected
  • 24-bit digital signal processing (DSP)
  • AES/EBU digital or analog audio input and output
  • Record and Cue functions
  • Selectable auto mix-minus
  • Selectable acoustic echo cancellation
  • Selectable auto answer and disconnect
  • Integrated monitor amp with front-panel volume control
  • Remote control via contact closures or RS-232
  • Adjustable caller control (ducking)
  • Adjustable three-band equalizer
  • Adjustable compressor and expander
  • Bass boost
  • Microphone send and cue preamps
  • Automatically accepts all worldwide voltages
  • Three selectable presets for customized audio
  • Worldwide compliant including FCC, CSA, CE, CTR 21

DH30 Specifications

 

Connections

  • Cue In: XLR Female, Mic/Line selectable, -55 or 0 dBu nominal, adjustable, balanced bridging, 20k Ohm impedance, selectable 12VDC phantom power
  • Caller Output: XLR male 0dBu nominal, adjustable, balanced, 50 Ohm impedance
  • Aux Output: XLR male 0dBu nominal, adjustable, balanced, 50 Ohm impedance
  • Telco Line: RJ-11 connector - POTS line or analog extension from a PBX or dry line (no DC offset voltage), A-Lead supervision provided
  • Telco Set: RJ-11 connector, A-Lead supervision provided
  • Remote: DB-25 Female
  • Remote Send Input: 0dBu nominal, adjustable, unbalanced, 20k Ohm impedance
  • Remote Caller and Aux Output: 0dBu nominal, adjustable unbalanced, 50 Ohm impedance
  • Control Inputs: Remotely activate any of the following functions with a simple switch closure to ground: On, Off, Cue, and Rec along with preset selection controls 1,2, and 3 or with Send, Caller, and Monitor Mute controls
  • Status Outputs: Remotely check the status of the hybrid using the On and Off status outputs. Status outputs are open collector outputs rated at 30VDC and 40mA maximum
  • Monitor Output: 1/4" stereo jack Tip=+phase, Ring=ground, Sleeve=ground, 1W output into an 8 Ohm load
  • Send Input: XLR female Mic/Line selectable, -55/0 dBu nominal, adjustable, balanced, bridging, 20k Ohm impedance
  • AES/EBU In: XLR, Pin 1=ground, Pin 2=+phase, Pin 3=-phase; 32, 44.1, or 48 kHz sample rate
  • AES/EBU Out: XLR, Pin 1=ground, Pin 2=+phase, Pin 3=-phase; 32, 44.1, or 48 kHz sample rate
  • RS-232: DB9 Female Connector, 9,600 baud rate, used for status and control via a PC or other RS-232 controller
  • Record Control: DB9 Female, Start, stop, and enable outputs are open collector outputs rated at 40VDC and 50mA maximum

Controls

  • LCD programming display, ENTER/ESC/st programming buttons, Monitor volume control, Send-level LED bar meter, Caller-level LED bar meter, Record, cue, Hybrid On/Off, Buttons with status LEDs

Telephone Transmit

  • All measurements referenced at -15 dBm level on the phone line
  • Frequency response: 250 Hz to 3.5 kHz, ±1 dB
  • SNR: >70 dB
  • Distortion: <0.15%

Telephone Receive

  • All measurements referenced at -15 dBm level on the phone line with caller processing options bypassed
  • Frequency response: 250 Hz to 3.5 kHz, ±1 dB
  • SNR: >70 dB
  • Distortion: <0.1%

Echo Cancellation/Mix-Minus

  • Tail time: 120 milliseconds
  • Null: 50 dB

Telco Cancellation

  • Tail time: 32 milliseconds
  • Null: 55 dB

Null

  • Send-to-Caller separation: 55 dB nominal
  • Tail time: 32 milliseconds

Power & Physical

  • Power: IEC Type, Auto Adjusting 100-240VAC, 2A, 50/60 Hz, 30W
  • Dimensions: 17.125" L x 10.125" D x 1.75" H (43.5 cm x 25.7 cm x 4.44 cm
  • Weight: 6.7 lbs (3.04 kg)
  • Operating Temperature: 32-100° F (0-38° C)
  • Operating Humidity: 0-80 percent

**DH20 & DH22 Sold Separately**