Part II: Settings and Measurements
(4) PCR_discontinity_indicator_error: The PCR_discontinuity_indicator_error is set in the case that a
discontinuity of the PCR values occurs and has not been signalled appropriately by the discontinuity
indicator.
(5) PCR_accuracy_error: If the PCR jitter exceeds ±500 ns, a PCR_accuracy_error will be set.
(6) PTS_error: The spacing between two PTS values must not be greater than 700 ms to avoid a PTS error.
(7) CAT_error: An MPEG-2 transport stream packet can contain scrambled data, but only the payload must
be scrambled, never the header or the adaptation field. A scrambled payload is flagged by two special
bits in the TS header, the Transport Scrambling Control bits. If both bits are set to zero, there is no
scrambling. If one of the two is not zero, the payload part is scrambled and a Conditional Access Table
(CAT) is needed to descramble it. If this is missing or only rarely there, a CAT_error occurs. The CAT has a 1
as PID and also a 1 as table ID. Apart from the EIT in the case of the transmission of a program guide, all
DVB tables must be unscrambled.
9-3.3 Priority 3 Parameters
(1) NIT_actual_error: Network Information Tables (NIT) as defined by DVB, contain information on frequency,
code rates, modulation, polarization, etc. of various programs which the decoder can use. It is checked
whether the NIT related to the respective TS is present in this TS and whether it has the correct PID.
(2) NIT_other_error:Further Network Information Tables (NIT) can be present under a separate PID and refer
to other TSs to provide more information on programs available on other channels. Their distribution is not
mandatory and the checks should only be performed if they are present.
(3) SI_repetition_error: For SI tables, a maximum and minimum periodicity are specified in EN 300 468 and TR
101 211 documents. This indicator should be set in addition to other indicators of repetition errors for
specific tables.
(4) Unreferenced_PID: Each non-private program data stream should have its PID listed in the PMTs.
(5) SDT_actual_error: The SDT (Service Description Table) describes the services available to the viewer. It is
split into sub-tables containing details of the contents of the current TS (mandatory) and other TS
(optional). Without the SDT, the receiver is unable to give the viewer a list of what services are available.
It is also possible to transmit a BAT on the same PID, which groups services by type.
(6) SDT_other_error: This check is only performed if the presence of a SDT for other TSs has been established.
(7) EIT_actual_error: The EIT (Event Information Table) describes what is on now and next on each service,
and optionally details the complete programming schedule. The EIT is divided into several sub-tables,
with only the "present and following" information for the current TS being mandatory. If there are no
'Present' or 'Following' events, empty EIT sections will be transmitted according to TR 101 211. The EIT
schedule information is only accessible if the TS is not scrambled.
(8) EIT_other_error: This check is only performed if the presence of an EIT for other TSs has been established.
(9) EIT_PF_error: If either section ('0' or '1') of each EIT P/F subtable is present both should exist. Otherwise
EIT_PF_error should be indicated.
(10) RST_error: The RST is a quick updating mechanism for the status information carried in the EIT.
(11) TDT_error: The TDT carries the current UTC time and date information. In addition to the TDT, a TOT can
be transmitted which gives information about a local time offset in a given area.
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