XM Satellite Radio (XMSR) said it cut a deal with 94.6% of the holders of its $400 million of 1.75% senior convertible notes, and will offer to exchange them for a new series of notes with a 10% interest rate but otherwise comparable terms. In return for the dramatic hike in the coupon, the noteholders have agreed not to assert any claim that the proposed merger of XM with Sirius Satellite Radio (SIRI) triggers a change of control provision that could allow the noteholders to demand XM buy back the notes at par.

The offer is conditioned on the closing of the merger, which awaits final approval from the FCC.

XMSR today is up 18 cents, or 2.4%, to $7.56.