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Evolution Digital
Figure 16 Code Download Diagnostic Screen
It is important to note that the DTA does not require a channel map, SCTE-65 tables (Netowrk PID), activation or
network configuration information to enter Code Download Mode.
2.6.1 CVT
The CVT is delivered in-band in the Network PID as an MPEG section. See Section 2.3.1.2 for more information
on how the Network PID is determined. The CVT format is specified in [Ref 1]; it is delivered as a private string of
bytes. It is highly recommended that the headend be configured to include the CVT in every QAM the DTA can
tune to. In this way, it will be assured the DTA will promptly detect new code versions available for download. The
DTA does not support delivery of the CVT via a DSG tunnel.
2.6.2 CVT Configuration Count
The DTA will monitor the CVT configuration count value. By default, the CVT configuration count value is set to
0. The DTA applies the default value to the CVT Config Count Change parameter in the Code Download diagnostic
screen when the DTA is reset either through power cycle or headend message. The DTA will store the new CVT
configuration count when it detects the CVT. Upon detection of a CVT configuration count different than the
currently stored value, the DTA will begin processing the CVT. Once the DTA verifies Hardware Version, Version
ID, Code Filename and other download parameters, the DTA will enter Code Download Mode.
Upon successful completion and load of the new code version, you can view the code objects stored in memory in
the Code Objects diagnostic screen as shown in Figure 17.
EVO-SUP-DMS2002HD-U-001-v1r0
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