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is the SV-Net protocol closed or some open standard? I assumed it was RS-232 but doesnt appear to be. Also, what are the data rates?

I have a D10A with 251 GPS recvr. Can I tap off the GPS-251 TX line (pin 10 at the DB25 of the D10A ?) to send NMEA data to another device?

Yes, I have tried setting it to to different values and it doesn't seem to help.  In reading the manual it states "While in the menu, press MINSPD to configure the minimum airspeed at which an AOA alarm can occur.Anytime airspeed is below the MINSPD value, AOA alarms will not occur; anytime it...

You've probably already resolved this by now, but FYI...  The GPS-251 in my C150 is installed on top of the cabin, centered left/right, just behind the front spar.

I also have experienced a similar issue in my taildragger with D10A.  My AoA audio warning does not stay active until I stop, but it does stay on well past taxiing off the runway.  Rather annoying.  I'm planning to make a 10 second delay interrupter with a 555 timer and a momentary pushbutton...

Thanks. We got it figured out and wired up today. We just tapped a 12v power wire into pin 12 of D25 connector. Happy to report the GPS was detected and works brilliantly.

hmmm... I ordered the only one Aircraft Spruce offers.  It mentioned nothing about NOT having wiring for the GPS antenna but after reviewing the item on their site I see it mentions: 'includes the necessary power and ground leads, encoder leads, remote magnetic sensor leads and RS-232 leads.'...

My harness only has yellow, orange and black wires into the D9 connector for PC interfacing. It does not have the power wire for GPS that taps into pin 12 of the D25. I guess I'll have to add this wire myself?

May have the problem resolved.  I believe we have the OAT probe set to type 1 instead of Type 2.  Will check that when I'm out at the hangar tomorrow.

Working on a D10A install. Getting an OAT not recognized indication. I've triple checked the wiring of OAT probe to EDC. Pins are in proper position in the DB9 connector. I've verified the EDC is connected by waving a magnet over the EDC and I see a heading change on the display. I've...