B
Configuration • QAM Configuration
APEX1000 All-Purpose Edge QAM Software Version 2.4.x • Installation and Operation Manual
103
573408-001-a
Item Definition/Range
Frequency Plan
Use to select one of the Frequency Plan modes.
Options are:
• STD
• HRC
• IRC
Note: Only configurable when QAM Transmission Mode is Annex B –
ATSC DCII.
Spectrum Inversion
Use to select the Spectrum Inversion mode.
Options are:
• Normal
• Invert
Select Normal for normal operation, and Invert to accommodate
non-standard systems.
RF Channel Spacing (kHz)
1. When QAM Transmission Mode is Annex A – DVB, the spacing
between the A and B channel center frequencies is user-configurable.
2. When QAM Transmission Mode is Annex B – ATSC DCII or Annex C –
Asia-Pacific, the channel spacing is fixed and cannot be changed.
RF Level Low Threshold
Use this text-entry box to configure RF low level limits for alarming.
RF Level High Threshold
Use this text-entry box to configure RF high level limits for alarming.
Interleaver Depth 1 and 2
Use to select Interleaver values for the RF Port. The drop-down menu
lists available Ranges.
QAM Transmission Mode Annex B – ATSC DCII allows for variable
interleaver settings. The standard value for Annex B 256 QAM mode is
I=128, J=4 and 64 QAM mode is I=128, J=1. If you select a non-
standard value, be sure that all the set-tops in your system support
those values.
Note: Only configurable when QAM Transmission Mode is Annex B –
ATSC DCII.
Symbol Rate (ksps)
When QAM Transmission Mode is Annex B – ATSC DCII, the symbol
rate is fixed based on Modulation Mode and cannot be changed.
Note: Only configurable when QAM Transmission Mode is Annex A –
DVB or Annex C – Asia-Pacific.
Information Rate (bps)
The read-only information rate displays according to the selected symbol
rate and Modulation mode, and cannot be changed directly.
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