Channel Plans: Setting Channel Plan Parameters
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selecting the unit’s default setting for Inverted Spectrum, which is simply
“Yes” or “No”.
• For example, when you select the NCTA channel plan, the SDA defaults
to Annex B and defaults to “No” regarding Inverted Spectrum because
the occurrence of spectrum inversion is not anticipated. If spectrum
inversion does occur, however, the setting can be edited to “Yes” on the
Edit Channel screen.
• The PAL-UK channel plan defaults to Annex A and to “Yes” for Inverted
Spectrum because spectrum inversion is anticipated with PAL-UK
channels. All other Base Channel Plans default to “No” for Inverted
Spectrum (because spectrum inversion is not anticipated).
Fig. 3-10 EDIT CHANNEL Menu Screen (Type: QAM)
Configuring a QAM Digital Stream Channel
1. From the EDIT CHANNEL PLAN screen, select the channel to be
configured as a QAM Digital Stream channel and press the Enter key
on the keypad.
2. Press the down diamond key to highlight Type from the EDIT
CHANNEL menu and press Enter to edit the current selection. Use
the down diamond key to select QAM Digital Stream and press Enter
(see Figure 3-10).
3. Press the down diamond key to highlight Modulation and press Enter
to edit the current selection. Use the down diamond key to select 64 or
256 QAM and press Enter.
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