SeaTalk and RS125 GPS

[O1dSoldier]

Hi Folks,

In the old forum I recently described a problem I'm having connecting my RS125 GPS to my E120 via SeaTalk. It doesn't work. When I connect the GPS via NMEA, I get GPS lock almost instantaneously. I was told I could test both the SeaTalk port on the MFD and the SeaTalk output of the RS125 using an analogue multi-meter while connected via NMEA and receiving signal. The moderator said I should see the meter pulse between 6 & 11 VDC. I did the test the other day and I did get very discernable pulses when testing the GPS but when I tested the E120 the meter stays steady at about 11 VDC. So, my question then is does this indicate that the SeaTalk bus on my E20 has gone bad?

Thanks in advance for your help.
Paul