Hear Technology PROHAES AES Card for PRO Hub

Hear Technology PROHAES AES Card for PRO Hub

The Hear Technology PROHAES is a professionally designed 16 channels of audio that are created connected to the AES/EBU card with the use of a Tascam DA-88 style pinout on a DB25 connector (see diagram below). This is the same pinout that standard analog DA-88 style connections use (like our Analog input card).

It comes with one difference: Most manufacturers use the first 4 balanced pairs (the first 8 channels) for inputs and the last 4 balanced pairs (the last 8 channels) for outputs. Due to the amount of space available on the back of our card, we use just one DB25 connector to input (or output) all 16 channels.

If the user are interfacing with AES/EBU on another piece of equipment that is using a DB25 type connector, the user will desire to use that manufacturer's break-out cable, which is capable of splitting out to individual XLR connectors first, then patch each of those XLR connectors to our cable. With the use of a DB25 to DB25 cable will not work (if you try it, you will likely get only 8 channels).

Input and Output Settings
The AES/EBU card are possible to either input 16 channels of balanced AES/EBU audio or it is possible to output 16 channels of balanced AES/EBU audio depending on where the four jumpers - J4, J5, J6, and J7 - are set. These jumpers are located on the card, and they are set by default as inputs at the factory. See jumper settings diagram below intended for both input and output settings.

Input
By the time the card is used as an input, the first pair of channels (1/2) are serving as the clock source for the system and must be connected to a valid AES/EBU source in order for the rest of the inputs to work.

All inputs MUST run at the same sampling rate and MUST have their word-clocks synchronized for avoiding a digital pops and clicks. The AES Card will automatically change sampling rate to lock on to the incoming signal.

Output
By the time the card is used as an output, the AES card will automatically change sampling rates to follow the sampling rate of the input source. Supported sampling rates are 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, and 192kHz.

Cabling
Standard microphone cable is not recommended for transmission of the AES/EBU signal. Digital-grade 110Ohm AES/EBU cable such as West Penn DA2401 is recommended.

The maximum distance you are possible to run AES/EBU on a good quality digital-grade 110 Ohm cable is a function of the maximum sampling rate that you wish you support.

Features

• Tascam DA-88-style pin-out on a DB25 connector for inputting or outputting 16 channels of digital audio
• Jumper settings allow the user to choose whether the card is 16 inputs or 16 outputs
• Supports and automatically locks onto sampling rates of 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, and 192kHz
• DB25 to (8) XLR (each AES/EBU XLR connector supports 2 channels of digital audio) break-out cable is sold separately, unless the AES/EBU card is purchased as part of the Hear Back PRO Four Pack
• (2) cards can be populated per Hub to allow A/B input switching between (2) banks of 16 channels
• Up to (4) cards can be populated to allow A/B input switching as well as dedicated AES/EBU outputs