Calrec Hydra2 VI5872 SDI

Calrec Hydra2 VI5872

The VI5872 provides 2 SDI outputs, into which audio can be embedded from the Hydra2 network. This is a 1 slot-wide module with SDI interfacing via BNC connectors.

Any console, H2O user or 3rd party SW-P-08 controller on the Hydra2 network can select audio to be embedded into the SDI outputs. Each SDI output can carry up to 16 channels of embedded audio.

Each SDI output is paired with an SDI input. A valid SDI signal must be fed into an input connector in order for the corresponding output to function. The output can only pass video content from its corresponding input—video content cannot be re-routed by the Hydra2 system. Any audio in the incoming SDI signal is stripped and discarded—all audio in the output stream is routed from the Hydra2 network. Audio channels within the output stream will be silent unless Hydra2 patches are made to them. If any of the audio content from the SDI input needs to be maintained, the signal should first pass through a de-embedder card (VO5841 / VO5873).

3rd party EMBER controllers, such as L-S-B's VSM and Colledia's BNCS have the ability to insert SMPTE2020 metadata into each SDI output stream's VANC space.

Front panel LEDs for each input will light up green to indicate a valid SDI signal is being received.

The standard modular I/O status LED flashes green once the card has booted and lights solid green once a connection between the card and the Hydra2 interface has been established.

Maximum Channel Count

As Hydra2 links are limited to 512 channels of audio in each direction, each I/O box can be populated with cards that provide a maximum of 512 input channels, and 512 output channels.

This limitation becomes a factor when a large number of SDI cards are fitted in the same modular I/O box. Channels are counted across the card slots from left to right. If, for example, SDI embedder (audio output) cards are fitted in the first 16 card slots, the output channel count will be at its maximum (16 channels of audio per SDI output x 2 SDI outputs per card x 16 cards = 512 channels) - Any output cards fitted in the remaining 4 slots will not pass audio or GPIO signals, irrespective of whether audio is being routed to any or all of the SDI outputs.

The remaining card slots could however be fitted with input cards as inputs and outputs have separate channel count quotas.

Note, the channel count totals mono audio channels, therefore, each SDI stream has a channel count of 16 and each digital AES port has a channel count of 2.

Call 01727 821 870 for more information.

Front Panel