I have the FreeFlight Rangr FDL-978-XVR Transceiver/Receiver, and am planning to *not* use the TC-978 Control Head. Based on the Installation documentation with the XVR, page II-1, it indicates "...Transponders with serial control data out capability (like the GTX-330/327/32/33 and SL-70/R) should be connected via an FDL-978-XVR serial port to control Mode A code and IDENT...."
I have a GTX-327, and I'm not finding any serial out pin that transmits "control data". Pin 20 appears that it can output Altitude data, but doesn't say anything about control data (IE: code/ident)
Further, in the same paragraph in the Installation Guide, it continues "...Mode A/C transponders without serial control data out can use the FDL-978-XVR internal Mode A receiver (configuration setting) which receives the on-board transponder transmissions to automatically set Mode A code and IDENT control data transmit."
So, now I'm totally confused. ...Does this mean that if I connect the transponder pin 20 output to the XVR Serial port 2 (pin 3) the XVR will figure out the Mode A code and IDENT from the transponder transmission (data stream)?
Help is much appreciated, thanks!
Michael
I have a GTX-327, and I'm not finding any serial out pin that transmits "control data". Pin 20 appears that it can output Altitude data, but doesn't say anything about control data (IE: code/ident)
Further, in the same paragraph in the Installation Guide, it continues "...Mode A/C transponders without serial control data out can use the FDL-978-XVR internal Mode A receiver (configuration setting) which receives the on-board transponder transmissions to automatically set Mode A code and IDENT control data transmit."
So, now I'm totally confused. ...Does this mean that if I connect the transponder pin 20 output to the XVR Serial port 2 (pin 3) the XVR will figure out the Mode A code and IDENT from the transponder transmission (data stream)?
Help is much appreciated, thanks!
Michael