The AEQ TH-03 is an advanced digital hybrid that comes in the version of 1 or 2 telephone lines, and either analogue or AES/EBU digital inputs and outputs.

Each model has built-in signal level metering for each hybrid line. Feedback is automatically mitigated by the digital hybrid, and no adjustments or calibration are required.

The two-line models include a mix-minus bus for multiplex communication while on-air or on-hold in the studio: Pressing the MPX button automatically establishes a conference between the two telephone lines, so only a single audio feed to and from the hybrid to the mixing console is needed. The TH-03 takes care of simultaneously getting both in-bound calls to the console, and provides audio from the console back to each individual telephone line, with both console audio and the other callers audio.

The TH-03 also has AEQ’s exclusive built-in frequency extender. When activated, it moves all frequencies 250 Hz upwards on the send line and 250 Hz downwards on the receiver line. This additional 2 ½ octave results in enhanced bass frequencies. To use the frequency extender functionality, another AEQ hybrid must be used at the far end.

Each telephone line incorporates a SET port which is disabled when the hybrid is on-air. Each of the TH-03’s telephone lines Off-Hook, Frequency Extender, and On-Air functions can be controlled locally via the front panel, or remotely using a console or a remote control panel.

The TH-03 is capable of operating with single or dual lines. Independent outputs line level, or multiplexed output provided by its unique multiplexing capabilities. Working with dual lines permits telephone multiconference, allowing the On-Air personality and two callers to talk and listen to each other simultaneously.

Feedback is eliminated by the digital hybrid. No adjustments are required to operate.

AUDIO INPUTS:Analog: Electronically balanced.Input impedance: > 6 K Nominal input level: 0 dBv.Digital: AES/EBU transformer balanced.Internal adjustment of audio gain.AUDIO OUTPUTS:Analog: Electronically balanced.Nominal output level: 0 dBv.Digital: AES/EBU transformer balanced.Internal adjustment of audio gain.TELEPHONE INTERFACE:Input/Output: Transformer coupled.Impedance: 600 Nominal input level: -10 dBm.Nominal output level: -6.5 dBm.*In conferencia mode, telephone line output level (nominal line input level): -7.5 dBm.DIMENSIONS:1 Standard 19” Rack Unit.Width: 482 mm. (19”).Height: 44,5 mm. (1.75”).Depth: 230mm. (9”). AUDIO BANDWIDTH (Frequency Extender OFF)Telephone Line: 300 – 4,000 Hz +/- 1 dBAudio Output: 300 – 4,000 Hz +/- 1 dBAUDIO BANDWIDTH (Frequency Extender ON)Telephone Line: 50 – 3,750 Hz +/- 1 dBAudio Output: 50 – 3,750 Hz +/- 1 dBDistortion: THD+N: 1 KHz at nominal I/O levelsTelephone Line: < 0.20%.Audio Output: < 0.15%.Absolute Noise: TX < -66 dBm. RX < - 68 dBm.Frequency Extender: TX = 250 Hz. RX = - 250 Hz.Cross-Talk: Lower than absolute noise.ELECTRONIC ECHO SUPPRESSION:Line impedance: One and two lines: 600 Signal source: One and two lines 1 KHz.Nominal input and output levels.Audio output level:One line: < -64 dBm typicalTwo lines: < -54 dBm typicalPOWER SUPPLY:90 - 250 VAC, 50-60 Hz, 35 VA.
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