DDA219 - Double D Electronics General Purpose 1+1 Switch Controller & Redundancy Controller

The DDA219 is a general-purpose controller for 1+1 switching systems using coaxial or waveguide switches, and includes automatic redundancy facilities. Its compact size makes it ideal for mobile use, and other applications where space is at a premium. A wide range of switch types are supported, including IF coaxial (50Ω or 75Ω), SHF coaxial and waveguide. Input and output switches may be different types, giving support for a wide range of equipment including HPAs, up and down converters, LNAs, LNBs and modems.

An alternative switching interface provides electronic buffering and switching of RS-422 signals, including two separately buffered outputs. There is a separate connector for alarms from each protected equipment chain; there is support for two fault signals from each chain (typically alarm and fault) and there is a voltfree contact for HPA muting during switching. Buffered alarm outputs are available in most configurations.

HPA muting is generated within the controller; the HPAs are muted during switching, and if a switch is moved manually or becomes disconnected. The DDA219 includes a remote monitoring & control port supporting 4-wire RS-485 and RS-232, compatible with the larger DDA70 family as well as the DDA69/DDA78 1+1 controllers. A networked SNMP V1/V2c interface is available as an option. The front panel provides local control and status. A number of standard front panel mimics can be supplied, including a generic layout and some showing typical redundancy configurations.