Payload (DVB-S2/S2X)

Payload is a parameter group within the Frame Definition tab containing the following parameters:

Payload Header specifies the payload header type.

Unknown - specifies the payload header is unknown.
None - specifies that there is no payload header.

Default: Unknown

Choices: Unknown, None

Payload specifies the payload data sequence.

Unknown - specifies that the payload is unknown (known modulation).
AllOnes - specifies that the payload bits are all 1s.
AllZeros - specifies that the payload bits are all 0s.
PN9 - specifies a PN9 bit sequence, as specified in CCITT T-REC-O.153.
PN11 - specifies a PN11 bit sequence, as specified in CCITT T-REC-O.153.
PN15 - specifies a PN15 bit sequence, as specified in CCITT T-REC-O.151.
PN20 - specifies a PN20 bit sequence, as specified in CCITT T-REC-O.153.
PN23 - specifies a PN23 bit sequence, as specified in CCITT T-REC-O.151.
Custom - specifies a custom sequence. After selecting the Custom, enter or paste the sequence into the field below the Payload parameter. The sequence is an array of integers where each integer is 0 or 1, representing a binary bit.
- Import - Import a custom bit sequence to use as the payload data. The import feature accepts None-, Comma-, Tab- or Newline-delimited data.
- Export - Export the bit sequence in the Custom Payload data field to a .txt file for later reuse. In the drop-down, select the type of delimiter to insert between data bits (None, Comma, Tab or Newline).

Default: Unknown

Choices: Unknown, AllOnes, AllZeros, PN9, PN11, PN15, PN20, PN23, Custom

BCH/LDPC Encode On enables or disables LDPC low-density parity check and BCH Broadcast Channel decoding for the payload.

Default: Disabled

Range: Enabled, Disabled

Soft Decision Decoding Enabled enables or disables soft decoding for the payload. During decoding, the input bits can be hard decision bits (0, 1) or soft decision bits which are float values indicating the reliability of the bits.

Default: Disabled

Range: Enabled, Disabled

Skip LDPC Decoding On Parity Check Fail enables or disables whether LDPC decoding is bypassed when there is an LDPC parity check failure.

Default: Enabled

Range: Enabled, Disabled

BER Enabled determines whether the payload data is included in Bit Errors, Bit Count and BER Bit Error Ratio - A ratio of the number of errors to data bits received on a digital circuit. metrics. See Frame Summary, Carrier Summary and Syms/Errs for more information.

BER calculations are supported if the payload sequence is either AllOnes, AllZeros, a PN 1) part number, or 2) packet number type or a custom bit sequence.

Default: Disabled

Range: Enabled, Disabled