Integrator's Manual

97
QAM output channels have a destination port of QamChannel *16 + subchannel number.
The top screen shows the status of each channel. The RF groups are labeled Qam1-Qam12.
Each RF channel can have up to 8 subchannels or programs. If a subchannel is active, its bit rate
will be shown. Bitrates are static snapshots.
Figure 53 – QAM24 Command Screen (bottom portion)
The bottom screen controls the RF output configuration and provides SW upgrade capability. 12
RF output channels are defined in 3 groups of 4. Each group of 4 is in a fixed channel sequence
starting with the base channel. Each group‟s base channel can be set according to the North
American Cable Television Frequency plan. Each RF channel can be individually turned on or
off. Each channel must be frequency adjacent and within the same band per the North American
Cable Television Frequency Plan (See EIA-542B or
http://www.jneuhaus.com/fccindex/cablech.html).
The QAM24 supports an emergency broadcast override. If a video stream is sent to port 25600 it
will override all of the channels.
The “tftpIP” address field sets the address of the file server for SW upgrades. “tftpFilename”
sets the name of the new SW image.
DO NOT turn off power or unplug a card that is updating its SW image. YOU WILL
create a doorstop.
The reset field executes a SW reset of the QAM24. It is almost user transparent.