The station also uses a BBC-designed pulse code modulation digitisation technique similar to NICAM, which is used for outside broadcasts running through a telephone line.
12.
It's 159 pages of fine print, and not a dull page in the lot, if you like reading about refraction indexes and pulse code modulation.
13.
By operating with a different carrier frequency of 250 Hz, additional pulse codes could be sent to the train without interfering with legacy 100 Hz codes.
14.
A single-bit error in audio data stored directly as linear pulse code modulation ( such as on a CD-ROM ) causes, at worst, a single click.
15.
The Gray code is sometimes attributed, incorrectly, to Elisha Gray ( in " Principles of Pulse Code Modulation ", K . W . Cattermole, for example ).
16.
There are two theories on how the signal that is being propagated is coded in the spikes as to whether it is pulse code or rate code.
17.
The pulse code modulated ( PCM ) data link transmitted digital data, which would be vital to providing automated spacecraft checkout and launch procedures on future flights.
18.
The current is very fast and not suitable for fine control of the resulting store charge, so pulse code modulation is used to accurately control the overall flow.
19.
The two modulation techniques used were pulse code modulation / frequency modulation ( PCM / FM ) and frequency modulation / frequency modulation ( FM / FM ).
20.
Speed restrictions required by the signal system are provided by the legacy Pulse code cab signaling system, which has been in service on various railroads since the 1930s.
