Thanks for your response.
I have scoped out the pin right at the device and a signal is getting there, not sure if it is a ? but I can check. I am assuming that it is since it is being sent from FM.
Pin 2.10 is the correct pin to be strobing, that has been confirmed on a couple of other docs.
After the ? is seen on the pins of RxD on the device, there is no data on the TxD. This confirms that at least 1/2 of the RS232 driver is working. I will lift a pin on the 232 device to see if it is holding the signal down and that is why I am not seeing the Tx information coming out.
I have scoped out the pin right at the device and a signal is getting there, not sure if it is a ? but I can check. I am assuming that it is since it is being sent from FM.
Pin 2.10 is the correct pin to be strobing, that has been confirmed on a couple of other docs.
After the ? is seen on the pins of RxD on the device, there is no data on the TxD. This confirms that at least 1/2 of the RS232 driver is working. I will lift a pin on the 232 device to see if it is holding the signal down and that is why I am not seeing the Tx information coming out.