Encoder/Decoder Uniqueness

[RSG]

Could any one here please explain...
I am trying to use RF600 encoder/decoder pairs.

Datasheet says that "up to seven transmitters can be learnt"
Does it mean that one decoder can respond to seven different transmitters (non-simulataneously/operating simultaneously)?

If I want to operate say 50 encoder/decoder pairs at one place, how can i be sure that the uniqueness of a particular encoder/decoder pair is maintained?

Please elaborate...

Thanks

 

[crutschow]

Apparently the decoder chip can learn codes from up to 7 different encoder chips stand-alone, or from up to 48 different encoders if used with an external EEPROM memory. The decoder can respond to any of the 7 (48) but not likely simultaneously since it wouldn't be able to uniquely sort out two overlapping signals.

The codes are uniquely (and randomly) determined when the decoder learns a code from the encoder. There are 4 billion changing codes (see pg.2 in data sheet) so it is unlikely that two codes would be the same for 50 encoder/decoder pairs.

 

[RSG]

"Manufacturer's key"

Custom Versions of RF600E/D

"Custom versions of the RF600E / D chipset are available, programmed with a unique ‘Manufacturers Key’ which means that the transmitter and receiver will respond only to other devices with the same unique manufacturers key. This provides a bespoke remote chipset for OEM applications".


I thought that once the decoder learns a particular transmitter, then it does NOT respond to any other encoder/transmitter...then, what is this concept of specific manufacturer's key?...any idea?

Thanks
RSG

 

[crutschow]

Custom Versions of RF600E/D

"Custom versions of the RF600E / D chipset are available, programmed with a unique ‘Manufacturers Key’ which means that the transmitter and receiver will respond only to other devices with the same unique manufacturers key. This provides a bespoke remote chipset for OEM applications".


I thought that once the decoder learns a particular transmitter, then it does NOT respond to any other encoder/transmitter...then, what is this concept of specific manufacturer's key?...any idea?

It sounds like you can't program a device to accept another Manufacturers Key. Only devices with the same Manufacturers Key can be programmed to read each other.