Serial outputs

[Rob Henderson]

I am trying to use 2 different serial outputs to talk to different devices. Serial out 4 is air data Z and serial out 7 is air data D. When I set out 4 it turns off out 7 and if I turn on 7 it turns off 4. How can I use both?

[Bobturner]

This sounds strange, I would call GRT.
But first (they will want to know), double check the wiring. Then,
When port 7 is on, does the device it's sending data to get it?
When port 4 is on, does the device it's sending data to get it?
Can you turn them both on (and stay on) if you change one format to something else?

[Rob Henderson]

Bob, thanks for the reply.
I know the wiring is good.
If I turn on serial output 7 my G327 stops showing the altitude immediately.
If I turn on serial output 4 the King 90B shows NO 232 DATA.
When I turn on both outputs to Shadin Z I get a serial port conflict message.
The King 90B will eat Shadin Z so I guess I will have to splice the 232 data in wire to the GRT serial out 4.
Thanks
-Rob

[Bobturner]

I have never read of any restrictions on using the same, or different, formats on different ports. I would call GRT.

[GRT_Jeff]

The "Fuel/Air Data" outputs are all driven by the same software and you can only have one active at a time. The conflict message is missing for the D format.