Seiwa Si-Tex MDA3 - Manual (Page 14)

Installation
Page 11
Step 3 - Connecting the VHF radio
Using the VHF radio accessory cable provided with this product, route the cable from the VHF radio to the AIS antenna splitter and
connect to the VHF radio connector on the AIS antenna splitter as shown in Figure 7. If the cable supplied is not long enough please
contact your dealer for details of suitable extension cables.
A standard marine band VHF voice radio should be used with this AIS antenna splitter. The antenna splitter is DSC compatible.
Figure 7 Position of the VHF radio connector
Power and FM
VHF antenna VHF radio
AIS transceiver