11.   Americans need more time than that to purchase new TV sets that can pick up the new digital TV signals, he said.

12.   Although the same law requires them to start broadcasting a digital signal, a bungled standard-setting process for receivers means that nobody is watching.

13.   An onslaught of charged particles in space can disable satellites by damaging solar-cell panels and altering digital signals.

14.   And on Monday, UPN added a digital signal.

15.   And some stations broadcasting digital signals do not yet offer any high-definition shows.

16.   And these decoders are not equipped to handle a highly complex digital signal pouring in at two, three or four times the normal speed.

17.   And while the boxes will translate the digital signal, the programming will not be in high definition.

18.   Another is splitting the airwaves that HDTV would fill into several digital signals of considerably lesser visual quality, or using some of the space for data transmission.

19.   As cable operators rebuild their lines to send and receive digital signals, they are adding many services.

20.   As the receiver converts the digital signal into analogue format for display on a conventional television, the anti-copy encoder can add extra pulses to the output.