I am working on interfacing my GRT Sport with my Garmin GTR-200 comm. The Garmin wiring harness included a shielded RS232 input wire, but it does not reach the EFIS. To test things, I spliced an unshielded wire to the center of the shielded wire from the radio, and ran that to the EFIS. The serial link works fine, but I am getting interference in the radio with the EFIS on.
The GTR-200 manual shows the RS232 serial line grounded at both ends with the shield. First, would it be acceptable to splice a new shielded wire to the end of the first? And second, where should I ground it at the EFIS side, as there is no grounded metal backshell?
Thanks for any input!
Chris
The GTR-200 manual shows the RS232 serial line grounded at both ends with the shield. First, would it be acceptable to splice a new shielded wire to the end of the first? And second, where should I ground it at the EFIS side, as there is no grounded metal backshell?
Thanks for any input!
Chris