Evolution Digital
EVO-SUP-DMS2002HD-U-001-v1r0
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3.2
Channel Map Updates
Channel map updates are supported by mechanisms detailed in [Ref 2]. When a new channel map is available, the
DTA will begin downloading the channel map in the background, with little to no interruption experienced by the
viewer. In addition, the DTA will continue using its currently loaded channel map until the new channel map is
fully loaded. As previously mentioned, the DTA will default its VCT ID to zero (0) until provisioned for a different
VCT ID.
When a channel map is fully loaded and currently in use, the Virtual Channel Map diagnostic screen will look
similar to that shown in Figure 22. Notice that the Stored VCT-ID is ”Loaded”. The second line represents the
VCT-ID of the channel map that is currently loaded and active; note the VCT-IDs match. Please note that the VCT-
ID values used in your system may be different than the values shown in the figure. The figure is for illustration
purposes only.
Figure 22 Virtual Channel Map Diagnostic Screen, Channel map loaded
Stored channel maps are persistent between power cycles. The DTA will ignore all channel maps with VCT IDs
different than the currently configured value. The remainder of this section details typical scenarios and how the
DTA behaves.
3.2.1
Addition of Channels
When channels are added to an existing channel map, the channels will be added with in a seamless transition.
Please view the Virtual Channel Map diagnostic screen to view additions.
