Double D Electronics Ltd.Redundancy Controllers
Waveguide
- DDA70 for power levelling/larger systems
- DDA86 for smaller systems, mixed switching
- DDA219 1+1 for fixed applications
- DDA224 1+1 for mobile applications
- DDA78 CRCA/VPC Controller
Up/Down Converters
- DDA89 up to 1+8, supports most converters
- DDA219 1+1 for fixed applications
- DDA257 1+2 for fixed applications
- DDA224 1+1 for mobile applications
Modems/Encoders/Decoders
- DDA89 up to 1+8 for many types
- DDA219 1+1 for fixed applications
- DDA257 1+2 for fixed applications
- DDA224 1+1 for mobile applications
Amplifier Subsystems
- DDA89 up to 1+8 for small signal amplifiers
- DDA219 1+1 for fixed applications
- DDA257 1+2 for fixed applications
- DDA224 1+1 for mobile applications
- DDA237 up to 1+8 with integral amplifiers and fault detection
LNA/B
- DDA219-X90 1+1 with PSU monitoring; 1U dual mains feed
- DDA257-X90 1+2 with PSU monitoring; 1U dual mains feed
- DDA86 1+1 or 1+2 with power supply monitoring
- DDA228 up to 4 LNA/B in various configurations; PSU monitoring
Comms Links
- DDA209 dial-in override for serial links
- DDA219 1+1 for fixed applications
- DDA224 1+1 for mobile applications
- DDA86 RS-422, serial, IEEE-488 data
Video (Coaxial ASI etc)
- DDA86 coaxial, RS-422 etc
- DDA89 up to 1+8
- DDA219 1+1 for fixed applications
- DDA257 1+2 for fixed applications
- DDA224 1+1 for mobile applications
General Purpose
- DDA86 mixed switching systems
- DDA219 1+1 for fixed applications
- DDA257 1+2 for fixed applications
- DDA224 1+1 for mobile applications
We can also offer a wide range of redundancy controllers based on standard units such as the DDA89, the DDA86, or on various other standard modules. Signal types switched comprise anything that will go through a mechanical relay or switch - latching types are used wherever available for best reliability and minimum power consumption. Where appropriate solid state switching can be used - for example PIN diode switches, audio matrices, RS-422 data. Alternatively commercially available routers are used in conjunction with our controller to provide special signal handling requirements, or where size or other considerations dictate.
Examples of switching systems built to date include:
- Modem Redundancy Switches
- Baseband and IF switching
- Modem settings updated on changeover
- Facilities similar to DDA89-02
- Video encoder/decoder redundancy switches
- Balanced audio and IF switching
- Encoder/decoder settings updated on changeover
- Video Redundancy Controllers
- All switching via routers
- Standby only controlled
These are just a few of the configurations which are possible; to discuss your particular application please contact the factory.
