Zenith DTV1080 - Manual (Page 11)

2-1. Sending Signals
10
206-3675
2. IMPORTANT OVERVIEW
Digital broadcasting is a new way of sending programs over the airwaves with superior qual-
ity video and audio. The Zenith HD Satellite Receiver enables you to take full advantage of
digital broadcasting. To fully enjoy it, you need to understand the ways the program signals
are sent.
There are two types of TV signal formats; analog (often called NTSC format; National Television
System Committee) and digital (ATSC format; Advanced Television System Committee). Digital
formats are classified into three catagories: High Definition (HD) Enhanced Definition (ED) and
Standard Definition (SD) according to the resolution or digital picture quality.
There are also three ways that program signals can be received; over-the-air (NTSC, ATSC),
cable, and Satellite.
TV
HD Receiver
Phone
Jack
Digital
signal Analog
signal
DIRECTV
Sat A 101 Sat B 110 Sat C 119
Satellite
Cable service