You are hereHome / XBT 173 IRRM
XBT 173 IRRM
The IRRM-173 device is designed to manage the redundancy between two different sources in a SFN environment by seamless switching between them.
Two logical inputs can be selected from the available physical input signals. The two selected input are real-time analyzed under rules of presence and validity.
The inputs that are present and valid are eligible to be sent to output. If only one input was present, is sent to output without the application of any validity rule.
One of the two inputs designated for switching can be marked as higher priority to allow its transmission whenever it meets the presence and validity requirements. Otherwise no priority can be set in order to switch only when the actual input is no more present or valid.
Synchronization
Validity checks of input are designed for a SFN environment.
The IRRM 173 needs 10MHz and 1PPS synchronization with any other SFN synchronized device of the network in order to guarantee a unique and stable bitrate reference.
The integrated GPS receiver provide a suitable frequency references source, otherwise external sources can be connected to the available 10 MHz and 1 PPS inputs.
10MHz and 1 PPS outputs permits to use IRRM-173 device as frequency reference source for a device following in the network.
Seamless input automatic selection:
The IRRM manages redundancy of two logic inputs with user selectable priority.
Each logic input can be associated to one of the physical input available:
• ASI1
• ASI2
• Tuner -DVB-S/S2
• RTP input on GBe port 2
The IRRM 173 switches automatically to the other logic inputs when the actual selected
one doesn’t meet the assigned presence and validity requirements.
