Providing simple and clean 2 x 2 switching between two SDI or DVB-ASI signals, the SW222 is relied on by multi-channel broadcasters.

It is equally at home as an emergency transmission switch to avoid broken equipment, or to manually bypass products requiring maintenance on a 24 hour station.

Each of the two inputs can be switched to either or both of two outputs (A and B), with up to four reclocked outputs of each switched signal available.

There's the choice of independent or opposite paired outputs. With independent operation you can control the selection separately for each output. With opposite paired outputs the switches are controlled so that output B always gets the input not selected for output A, making B a preview that will always show what will be transmitted if you change the switch.

An automatic switch away from a faulty SDI source is triggered on loss of input or invalid video (determined by loss of the sync word structure), while if the SW222 is set for ASI it will only switch on loss of input.

The SW222 gives you the choice of switching between the two feeds either immediately or in the vertical blanking period (with it detecting the video standard and switching at the appropriate point) to enable a clean switch.

The SW222 offers powerful and flexible control using a combination of board edge piano switches and GPIs. Up to four GPI inputs with tally can be used for control applications such as wiring physical buttons to represent the inputs, while lamp drivers allow a bulb to be lit to indicate the input selected.

The SW222 is a 100mm x 266mm module fitting in the standard frames (available in 4U, 2U, 1U and desk top box) and allowing easy integration with any products from the range.

It gives flexible outputs thanks to the choice of four rear modules to suit all applications - the RM01, RM02, RM18 and RM38. Bringing an extra layer of security, the RM38 provides relay bypass protection on power failure or board removal, preventing signal loss by mechanically connecting the inputs of the SW222 to its outputs whenever the supply to the RM38 is interrupted.