PLS - Physical Layer Scrambling

Barcelona, January 20, 2017.

Physical Layer Scrambling or PLS is used in DVB-S2 as a way to improve data integrity. A number called the "scrambling sequence index" is used by the modulator as a master key to generate the uplink signal. This same number must be known by the receiver so that demodulation is possible.

Most satellite transponders use PLS 0 as a default value but there are some transponders that use other values.

Unidentified DVB-S2 satellite transponder
Unidentified DVB-S2 satellite transponder
 
 
We press F2 and enter the corresponding PLS sequence number
We press F2 and enter the corresponding PLS sequence number

RANGER Neo Lite field strength meters are compatible with this type of signals. The PLS sequence number can be entered under F2 as shown in the above right picture.

After entering the PLS sequence number, the satellite transponder has been locked
After entering the PLS sequence number, the satellite transponder has been locked
Now the instrument is able to decode
Now the instrument is able to decode the picture and audio
 
PROMAX is a leading manufacturer of test and measurement systems, broadcast and TV signal distribution equipment. Our product lines include measuring instruments for cable TV, satellite TV, broadcast, wireless and fibre optics networks, FTTH and GPON analysers. DVB-T modulators, IP streamers or IP converters (ASI, DVB-T) are among the company’s latest developments.
PROMAX on Twitter PROMAX on Facebook PROMAX on LinkedIn PROMAX on Google+ PROMAX news RSS feed PROMAX channel on YouTube
The most wanted products
General information
Resources and multimedia
This website uses its cookies and third-party cookies to improve and optimize the user experience. If you continue browsing this site we will assume that you are agreeing to our use of cookies.