When I plug in my TDS3EM module into my TDS3014B/C scope+ I get a message telling me there is a hardware conflict. Why is that?

When I plug in my TDS3EM module into my TDS3014B/C scope+ I get a message telling me there is a hardware conflict. Why is that?

The TDS3000B/C family already has an Ethernet connection built in. So when a TDS3EM module is installed there would be two ethernet (LAN) connections, which is not allowed.