Rohde & Schwarz SMCVB-K168, User Manual

Page: 21 / 91

DVB-S2 Configuration and Settings
R&S
®
SMCVB-K168
21 User Manual 1179.1064.02 ─ 03
Settings:
Test TS Packet ............................................................................................................. 21
PID Test Packet ............................................................................................................21
PID (Hex) ..................................................................................................................... 21
Payload Test/Stuff. ....................................................................................................... 21
PRBS ............................................................................................................................ 21
Test TS Packet
Specifies the structure of the test transport stream packet that is fed to the modulator.
"Head/184 Payload"
A sync byte (0x47) followed by three header bytes and 184 payload
bytes.
"Sync/187 Payload"
A sync byte (0x47) followed by 187 payload bytes.
Remote command:
[:SOURce<hw>]:BB:DVBS2:TSPacket
on page 64
PID Test Packet
If a header is present in the test packet ("Test TS Packet > Head/184 Payload"), you
can specify a fixed or variable packet identifier (PID).
"Null" The header of the test transport stream packets has a fixed setting of
null packet header 1FFF (hex).
"Variable" Uses the header value defined with PID (Hex) .
Remote command:
[:SOURce<hw>]:BB:DVBS2:PIDTestpack
on page 65
PID (Hex)
Sets the PID .
If "PID Test Packet > Null", "PID (Hex) = 1FFF" is fixed.
If "PID Test Packet > Variable", you can edit the value.
Remote command:
[:SOURce<hw>]:BB:DVBS2:PID
on page 65
Payload Test/Stuff.
Defines the payload area content of the TS packet.
You can select PRBS or exclusively data in hexadecimal format as payload.
For "Source > Test Signal", the packet is a test packet.
For "Stuffing > On", the packet is a null packet. Null packets are inserted into the exter-
nal transport stream to adapt the stream data rate. See also
" Measured Data Rate "
on page 20.
Remote command:
[:SOURce<hw>]:BB:DVBS2:PAYLoad
on page 65
PRBS
Sets the length of the PRBS sequence.
Input Signal Settings