Will I lose my Survivor Benefit if I get CPPD?

I get my late husband’s CPP (survivor benefit). If I get approved for CPP-D, I understand that the benefits will be combined to a single payment but I can’t get an answer on if I will still get the full amount from the survivor benefit as well as CPP-D. I’ve called and asked and no one seems to know the answer. If approved, I can get about $940/month for CPP-D. Would the $580 I get for survivor benefit be added to that or just up to a certain amount?

There is a maximum amount you can get per month added together, it is $1,467.04.