IFD5XX/4XX Interface with TDR94 Transponder. ![][1] ![][2] [1]: https://hf-files-oregon.s3-us-west-2.amazonaws.com/hdpavidynesupport_kb_attachments/2019/08-12/23f3aa43-84c6-4a85-98b0-d5010f3bf41b/image.png [2]: https://hf-files-oregon.s3-us-west-2.amazonaws.com/hdpavidynesupport_kb_attachments/2019/08-12...