Can also Test reception of the Broadcast Tv stations/channels to the , South East , South , South West.
Aim the CM4228HD antenna about 180 degree magnetic compass direction.
Scan for channels.
Digital Broadcast Tv Tuners can develop -Digital Glitches- that are not cleared out with simple channel scans.
Do Double Rescan ,
www.wchstv.com/DoubleReScanAlert.pdf