Application Note

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would be 2 X 16 = 32 32 + 3 = 35 so a port value of 35 will send the programming to the RF channel
representing Qam2 QamSubChannel 3. Another way to look at it is Port = PortBase + SubChannel. The
portBase listed in the grid for Qam2 is 32 and 32 + 3 = 35.
The next column to the right is Chan. This is the RF channel that the QamChannel represents. This
channel is set in the Control section of the QAM page using the baseChannel variable. The base channel
variable sets the first of the four RF channels of the up convertor IC. This is explained in detail in the
Control section of this document.
The next bunch of columns are labeled -1, -2, etc. These columns represent the QamSubChannels (minor
number) of the each of the 12 QAM channels. In the box at the intersection of a QAM channel and a sub
channel is the bitrate of the transport stream being sent to that QAM channel - subChannel. This data
rate is expressed in megabits per second.
The rightmost column shows the total bitrate for each QAM channel (Qam1-Qam12) and at the bottom
the total bitrate for the entire QAM6.
Control Section
Figure 4
The Control section of the QAM page is both informational and used for configuration of the QAM6 and
software updates. In figure 4 across the top of the section you find the chassisID, the hwVersion (this is
the version of the FPGA firmware), swVersion and tempC (averaged temperature of IC) below this is the
MAC of the QAM6 Ethernet port and the license count (number of functional QAM channels).
Below the informational portion of the of the Control section you find the baseChannel setting for each
of the 3 up convertor ICs (A, B and C) that are on the QAM6. This is where you set the RF channel that