DI-2000 Digital Telephone Hybrid

DI-2000 Digital Telephone Hybrid
Radio Systems
DI-2000 Digital
Telephone Hybrid
Radio Systems’ digital dual-line phone hybrid provides everything you demand from a broadcast
phone interface. Just a push of a dedicated front panel button answers calls, puts callers on hold,
on-the-air, or in conference mode. Digital line nulling provides excellent separation and audio
quality, and microprocessor controlled switching circuitry makes the DI-2000 the most featured,
best sounding and easiest to use hybrid you’ll ever own.
• Dual Line Hybrid functions as 2 separate hybrids or conference system
• Full automated console remote control
• Automatic digital nulling
• Producer and screener phone support
• Auto-answer feature
• Console to-caller cueing
• Full line monitoring for auto call drop and auto-nulling
• Internal mix- generation
• Acoustic room echo cancellation
• Record outputs
601 Heron Drive • Logan Township, New Jersey 08085
(856) 467-8000 voice • (856) 467-3044 fax • www.radiosystems.com
Radio Systems
The ANSWER/CUE control flashes red to indicate an incoming call. Push once to answer the call and automatically route the caller audio to the cue channels.
Callers placed on HOLD are fed program audio. If in the conference mode, callers can speak to each other off-air.
Pressing the DROP button disconnects callers, and (with) any of the three other mode buttons initiates the auto-answer feature. Calls will be automatically seized and
placed into any of the three modes selected. The lamps flash slowly to indicate the auto-answer mode selected.
Callers are automatically switched between three audio sends; cue when answered, program on hold, and mix-minus on air (the mix-minus also contains the second
caller's output in the dual model.) The multiple outputs to the studio include caller cue on answer (useable as line level input or direct speaker drive), main output,
and a mixed caller/host output for recording. Dip switches program whether the unit operates in a conference or dual line mode, and how the audio mix is shared
between callers. The unit accepts a mix-minus input from the console if one is available but does not require one to create an excellent caller to host null. The remote
connector interfaces console automated answer functions and supports an external remote control panel. A producer's phone jack is also provided for off-air call
screening. To record callers off air, the di-2000 provides a mixed (caller and host) audio output.
The DI-2000 is ideal for conference calls, with several optional and programmable modes for mixing caller outputs and cue input buses. The unit also creates an
internal inter-caller talk path, eliminating the need to supply a second mix-minus output from the console. The DI-2000 can also be programmed to operate as two
separate single-line units.
Hybrid Technology
Full duplex operation is automatically achieved using adaptive filtering techniques which dynamically calculate and maintain the maximum caller to host null
(trans-hybrid loss). This digital filter trains on both the acoustical (speaker to microphone) and line (caller send/ receive) signals to suppress echo from both paths.
The auto-nulling function is accomplished in the first few seconds of call connection and without the use of a white noise burst.
Audio Inputs
Remote Control Lines
Console Logic Remote Lines
Impedance: 10K ohm, active balanced
Maximum input level: +21 dBm
Nominal input level: +4 dBm
1/4 inch balanced (TRS) phone connector Mix-minus input: provides audio to
caller when on air
Cue input: Provides audio to caller when in ans/cue
Music-on-hold input: provides audio to caller when on hold
Answer / cue switch control
Hold switch control
Air switch control
Drop switch control
Answer / cue lamp
Hold switch lamp
Air switch lamp
Line 1 & 2 seize relay (c form)
Off switch control (answer, cue, hold, drop)
On switch control (air, cue)
Off lamp (ring flash, hold flash)
Audio Outputs
Impedance: 60 ohms, active balanced
Maximum output level: +14 dBm
Nominal output level: +4 dBm (.3 watts ‹ cue adjustable level)
1/4 inch balanced (stereo) phone connector
Record output: mix of caller and host audio
Cue output: caller audio when in ans/cue
Speaker level: cue channel
Main output: caller audio when on air
Distortion 1% THD at 1 kHz
Frequency Response 300 - 3300 Hz +/- 1 dB
Noise 65 dB referenced to 0 dBm phone level
Transhybrid loss 40 dB minimum
Power 115/230 switchable 50/60 Hz
Telco line inputs
2 tip/ring standard (pots) line inputs
Ring voltage detect
Off-hook line detect (for auxiliary phone)
Line-drop detect (for auto disconnect)
RJ-11 (4 wire) connector
1 year parts and service
Specifications subject to change without notice.
601 Heron Drive • Logan Township, New Jersey 08085
(856) 467-8000 voice • (856) 467-3044 fax • www.radiosystems.com
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