The Channel Number for QAM Channel A. Range is 0 to 158, with valid channels being 1 to 158 and 0 indicating 'not applicable'. This parameter is valid only when QAM Transmission Mode is 'annexB-ATSC-DCII'. This parameter is configurable only when Tuning Mode is 'channel'. When Tuning Mode is 'channel', this is the Channel Number used to determine the output frequency of QAM Channel A using the selected Frequency Plan. When Tuning Mode is 'frequency', this value is determined by the APEX using the selected Frequency Plan. If there is no channel number for the frequency, the value is set to zero. This parameter is not configurable for Transmission Modes of 'annexA-DVB' or 'annexC-Asia-Pacific' and the value is set to zero by the APEX. Channel 1 is not defined in CEA Standard: Cable Television Channel Identification Plan (CEA-542-B) for the Standard (STD) North American frequency plan. Channel 1 cannot be selected when apexQamRfConfigEiaFrequencyPlan is 'std'. Channel 2 as defined in defined in CEA Standard: Cable Television Channel Identification Plan (CEA-542-B) for the Harmonic Related Carrier (HRC) frequency plan is below the APEX 57 MHz minimum frequency. Channel 2 cannot be selected when apexQamRfConfigEiaFrequencyPlan is 'hrc'. For 4x4 QAM Modules: Channels with frequencies below 69 MHz may not be available. This limitation is dependent upon the HW version installed and number of channels enabled.