Sounds like your reception of Channel 5 is less than the ideal. Take it to a friends house with better reception, re-scan channels and bring it home and try again.
It's possible that the picture may freeze or pixelate.
Surface Pro (2017) vs Surface Pro 4
20 groundbreaking 3D animation techniques
How to mine Bitcoin on Mac
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.