AEQ TH-03

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 multi-conference, 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 conference 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: 230 mm. (9″”).AUDIO BANDWIDTH (Frequency Extender OFF)
• Telephone Line: 300 – 4,000 Hz +/- 1 dB
• Audio Output: 300 – 4,000 Hz +/- 1 dB
• AUDIO BANDWIDTH (Frequency Extender ON)
• Telephone Line: 50 – 3,750 Hz +/- 1 dB
• Audio Output: 50 – 3,750 Hz +/- 1 dB
• Distortion: THD+N: 1 kHz at nominal I/O levels
• Telephone 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 typical
• Two lines: < -54 dBm typical

POWER SUPPLY:

• 90 – 250 VAC, 50-60 Hz, 35 VA.