Using the Equipment
Note: PMT Update Mode is a separate process to Hunt Mode. Hunt Mode handles
the service selection, whilst PMT Update Mode handles the service
component (PID) selection after the service has already been selected.
There are three PMT Update modes available:
• SUSTAIN – This is the default setting and behaves the same as the previous
releases i.e. it takes in to consideration the current PID selection when
deciding what PIDs to select and maintains it.
• REFRESH – On arrival of a new PMT this flushes the existing PID
selections, except for USER PID type selections, before deciding which PIDs
to select. In general PID selections are dependent on component order
within the PMT.
• FLUSH – This mode is similar to REFRESH but flushes the PID selections
when no PMT is received for 2 seconds.
The PMT update method can be configured via the front panel, web interface or
RCP control.
Note:
If a new service has been selected either by the user or by the Hunt Mode
operation, all existing PID selections are flushed when processing the PMT for
the first time i.e. PID selections will be dependent on the PMT order initially.
Is PMT Update Mode
set to REFRESH?
REFRESH MODE:
Reselect service
components (PIDs)
according to PMT order
SUSTAIN MODE: Keep
current selection of
service components
(PIDs)
NO
YES
PMT UPDATE MODE
PMT Update Mode
review complete.
No more action taken
START
New PMT section
filtered
Has PMT verison
changed?
YES
NO
Figure 3.96 PMT Refresh Mode
• SI Mode – This menu selects the following options.
- DVB: The receiver will assume DVB table syntax and will only look for the
appropriate tables on the appropriate PIDS for DVB SI.
- ATSC: The unit will only look for the appropriate tables on the appropriate
PIDs for ATSC SI.
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