said by Aprel:Edit: Apparently this is done by setting the MoCA AP to broadcast on a different wireless channel than the main router. Wonder if that would do the trick in the repeater config....
Answering my own question...looks like you can do this, but then wireless clients have to decide which channel to connect to and may choose the inferior repeater network when the main router is well in range, or require each client to be configured separately as to which channel to prefer. So setting a separate SSID for the repeater seems like the best way to go.
Hopefully I'll get to this this weekend and let you know how it goes.