I assume you have already done a proper Forum Search for your model number in case other people have already answered your question ?
If so and that didn't help then check out this thread: https://community.sling.com/message/10363#10363
Come back if it that doesn't help either.
Hoping someone can help a newbie out. I purchased a Slingbox M1 and Mediasonic Homewrox HW-150 PVR. I was hoping to connect the PVR to a non scrambled cable source to view cable programming on my phone etc... I know I will need an QAM firmware update on the PVR but when I tried connecting the Slingbox it list various PVRs but none made by Mediasonic and I was not able to complete install. The Slingbox install requires me to input a cable box brand and model in order to complete the install.
I have emailed both companies not response yet, if anyone out there has overcome this please share.