Greetings:
We decided to post this thread to share some information pertaining to Transducer ID and the sounders that utilize them. There seems to be some confusion on this subject matter so it may be a good idea to provide a knowledge base on this subject matter.
In 2006, AirMar announced the incorporation of the transducer ID on some of its transducer.
http://www.airmartechnology.com/uplo...%20release.pdf
The idea behind this is to allow sounder makers to query the transducer attached to it and determine the capabilities of the said transducer. It is also a good way to prevent damage to transducers that are not able to handle the more powerful settings that a capable sounder can provide.
Sounder manufacturers have started to incorporate their products features that take advantage of the Transducer ID. Some sounders like the Garmin GSD22 automatically queries the transducer for the ID and sets itself to the optimim setting. If the GSD22 cannot determine the transducer ID, it sets itself to the default setting of a lower powered transducer (600 watts) so as to inadvertently damage lower powered transducer that may attached to it. If the GSD22 determines that a higher wattage trasducer is attached to it via the transducer ID info, it will set itself up for the higher power operation. This is done automatically by the system and from information we have, there is no manual override feature on the GSD22.
Some sounders do have the override feature like those made by Furuno which will allow the user to instruct the sounder to operate at certain setting regardless of what transducer is attached to it.
GetFeetWet Support
AirMar Transducer ID 
