DVB-T Configuration and Settings
R&S
®
SMCVB-K163
33
User Manual 1179.0997.02 ─ 02
4.5
Special Settings
Access:
► Select "Baseband > DVB-T > Special".
The tab provides settings, that differ from the specification of the broadcast stan-
dard.
Settings different from the broadcast standard can be useful for research and develop-
ment. Applying these settings requires "Special Settings > On".
If you set a parameter different from the specification, the warning icon is displayed
left to the parameter.
Settings:
Special Settings
Enables/disables special settings.
The setting allows you to switch between standard-compliant and user-defined channel
coding.
Remote command:
[:SOURce<hw>]:BB:DVBT[:SPECial]:SETTing[:STATe]
Reed Solomon
Enables/disables the Reed-Solomon encoder.
The standard stipulates a Reed-Solomon RS (204, 188), i.e. "Reed Solomon > On".
Incoming packets of the TS frame have a length of 188 bytes or, in special cases, a
length of 204 bytes. The packet length determines
"On"
●
"Packet Length
=
188": The Reed-Solomon encoder adds
16
Reed-Solomon bytes to the incoming 188
bytes of an MPEG
transport stream frame. The Reed-Solomon decoder can correct
up to 8
erroneous bytes in a Reed-Solomon packet (= 204
bytes).
The number of incorrect bits in an errored byte is irrelevant.
●
"Packet Length
=
204": Of the incoming 204 bytes of an MPEG
transport stream frame, the Reed-Solomon encoder overwrites
the last 16 bytes with its own Reed-Solomon bytes.
Special Settings