DH30 - Digital Hybrid

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.

Specifications
Connections:	AES/IBU In: XLR Pin 1=ground, Pin 2=+phase, Pin 3=-phase; 32, 44.1, or 48kHz sample rate AES/IBU Out: XLR Pin 1=ground, Pin 2=+phase, Pin 3=-phase; 32, 44.1, or 48kHz 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 Remote: DB25 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, -55/0dBu nominal, adjustable, balanced, bridging, 20k ohm impedance Echo Cancellation/Mix-Minus Tail time: 120 milliseconds Null: 50dB Telco Cancellation Tail time: 32 milliseconds Null: 55dB Cue In: XLR Female Mic/Line selectable, -55 or 0dBu 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: RJ11 connector POTS (plain old telephone service) line or analog extension from a PBX or dry line (no DC offset voltage). A-Lead supervision provided Telco Set: RJ11 connector A-Lead supervision provided Telephone Transmit All measurements referenced at -15dBm level on the phone line Frequency response: 250Hz to 3.5kHz, ±1dB SNR: >70dB Distortion: <0.15% Telephone Receive All measurements referenced at -15dBm level on the phone line with caller processing options bypassed Frequency response: 250Hz to 3.5kHz, ±1dB SNR: >70dB Distortion: <0.1%
Functions:	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
Power:	IEC Type Auto adjusting 100-240VAC, 2A, 50/60Hz, 30W
Physical:	Dimensions (LxDxH) 17.125" x 10.125" x 1.75" 43.5 x 25.7 x 4.44 cm Weight 6.7 lb/3.04 kg (dry) 11.2 lb /5.08 kg (shipping)