Optik TV wireless range.

What is the wireless range of the Optik TV signal (VIP5662W)? I have a wireless STB in our main bedroom (VIP5602WT) that only has 1 or 2 bars of signal and keeps freezing…it is about 50 ft away from the router (Arcadyan). Will a Telus wi-fi booster improve the signal to that STB in the bedroom? Thank you.