Thanks for reporting derek I happen to have a pretty similar setup except for not getting the Global signal. You should call them, you're the first one that might be using 7mc with Global Ottawa around here.
I have been trying to give it a go...but no detection so far in 7mc.
Here are my findings with rabbit ears:
1. put rabbit ears direct to my pioneer tv atsc tuner. I picked up cbc french and english and several others (digital and otherwise), no global.
2. same as number one except put the rabbit ears on the roof. Everything vanished...even cbc. For whatever reason the rabbit ears work best ~15 feet below the peak of my roof.
3. Tried the rabbit ears routed through my cm7777 vhf input (in separate mode) along with my cm4228. Nothing on the roof for VHF...picked up the usual suspects 15feet below roof line.
4. Tried my old RCA powered rabbit ears (which includes a rotatable circular loop in middle both through the cm7777 and direct to TV...same results with a bit better reception on the analog stations.
just wondering...is global analog off the air? I get nothing on channel 6 at all.
I was wondering if its something to do with wmc. I am going to try direct to my pioneer and see if that works next.
EDIT: I don't know how to add 6.1 manually to the pioneer or to wmc...looks like I have some tinkering to do.