[CA] [CA11] Trouble Adding Tacktick T122 to Existing System

[Chuck - Raymarine - Moderator]

bobcat,

Q1. Given this does it still make sense to sent it to Raymarine or should I just order a TA119 3-up battery pack?
A1. Replacing its battery would be my recommendation unless you have some reason to believe that the T122 has been damaged or has otherwise suffered a failure.

Q2. Why does the T122 have a 2 separate NMEA inputs?
A2. One is dedicated to GPS input from a 12V powered GPS Sensor supporting 4800 BAUD NMEA 0183 communications such as the TackTick T908 GPS Sensor. Other NMEA 0183 data sources (ex. depth, speed, etc. may be interfaced to the second NMEA 0183 input port of the T122.

Q3. In particular is there something special about the input labeled GPS NEMA1 vs ALARM NEMA2? (i.e. can they be used for any 0183 instrument?) What is the purpose for the GPS PWR out?
A3. The software processing associated with the GPS port is designed to process GPS data exclusively. As NMEA 0183 GPS sensors are require power, the power leads of the GPS sensor would be interfaced to these terminals.