Question on the Serial Port signal of the SkyView Classic SV-D1000

[ds3fch]

Hi, this is the another problem of SV-D1000 configuration.

The serial ports of SV-D1000 are connected to
#1 – Garmin GTX 330 XPDR
#2 – ZAON PCAS XRX
#5 – Garmin 750 GPS

#5 port works normally. I can see the Tx/Rx signals at the pin 12(Tx)/11(Rx) with the oscilloscope.
#1 and #2 shows no signal (both Rx/Tx) and [TRAFFIC] sign appears on the serial port setup.
What does this mean?
How can I set up these #1 and #2 serial ports properly?

 

[maartenversteeg]

Did this wok before or is this a new setup. If it worked before and you have not worked on any wiring then you should check the wiring, the status screen clearly shows that no communication is happening. If this is a new setup, then you should focus on the wiring of the units, are the correct wires connected serial RX from the display connected to the TX of the transponder etc. Is there anyuthing that needs to be configured on the transponder.