Hopefully someone has a quick fix. I have installed an IF-NMEA2K2 drop on the operating NMEA2k backbone with hopes that I could send and receive waypoint output data to and get heading data from my Simrad AP22/j300x autopilot. The Simrad will output heading (HDG) at 10Hz (= 100ms) so in theory that should be fine for radar overlay.
The interface device is recognized on the TZT3 sensor list, its amber light flashing, it appears on the data source page although no data present, and I have PGN's 129025, 026, 029, 283, 284 and 285 turned on.
I wired the IF-NMEA2K2 wires to the Simrad j300x terminals as follows:
Pink to TB10 RX2+
Pink/Black to TB10 RX2-
Blue to TB10 TX2-
Blue/yellow to TB10 TX2+
I get no heading data going into the TZT3 nor does the AP22 receive waypoint data from the TZT3 via the IF-NMEA2K2.
So dumbfounded I ran a few checks.
First, I hooked only the converter NMEA 0183 output leads to my radio and no Lat Lon data appeared.
Second, I hooked the TZT3 NMEA 0183 output from the multicable to my DSC radio with the GLL and APB sentences turned on. The radio received the Lat/Lon and time data fine.
Third, I ran a loop test on the Simrad NMEA 0183 connections jumping the output to the input and it checked OK. I then connected the multicable NMEA 0183 output from the TZT3 to the Autopilot NMEA 0183 input TB10 RX+/- and the Go To heading data from the TZT3 was present on the Autopilot. The Baud rate set at 4800, the NMEA version at 2.0. Unfortunately, there is no way for me to double check the Simrad output other than the jumper test I did.
I'm hoping someone has successfully integrated an older Simrad AP into the latest generation of TZTs via IF-NMEA2K2. Maybe I've overlooked some step to jump start this darn thing? Or am I chasing something un-attainable with the IF-NMEA2K2?
I know a (amazing) SCX-20 would solve my heading issue as well a smooth out many other things, but that is not in my budget right now.
The interface device is recognized on the TZT3 sensor list, its amber light flashing, it appears on the data source page although no data present, and I have PGN's 129025, 026, 029, 283, 284 and 285 turned on.
I wired the IF-NMEA2K2 wires to the Simrad j300x terminals as follows:
Pink to TB10 RX2+
Pink/Black to TB10 RX2-
Blue to TB10 TX2-
Blue/yellow to TB10 TX2+
I get no heading data going into the TZT3 nor does the AP22 receive waypoint data from the TZT3 via the IF-NMEA2K2.
So dumbfounded I ran a few checks.
First, I hooked only the converter NMEA 0183 output leads to my radio and no Lat Lon data appeared.
Second, I hooked the TZT3 NMEA 0183 output from the multicable to my DSC radio with the GLL and APB sentences turned on. The radio received the Lat/Lon and time data fine.
Third, I ran a loop test on the Simrad NMEA 0183 connections jumping the output to the input and it checked OK. I then connected the multicable NMEA 0183 output from the TZT3 to the Autopilot NMEA 0183 input TB10 RX+/- and the Go To heading data from the TZT3 was present on the Autopilot. The Baud rate set at 4800, the NMEA version at 2.0. Unfortunately, there is no way for me to double check the Simrad output other than the jumper test I did.
I'm hoping someone has successfully integrated an older Simrad AP into the latest generation of TZTs via IF-NMEA2K2. Maybe I've overlooked some step to jump start this darn thing? Or am I chasing something un-attainable with the IF-NMEA2K2?
I know a (amazing) SCX-20 would solve my heading issue as well a smooth out many other things, but that is not in my budget right now.