DMG 3200/3100/3000 – User Manual
Page 96 (306)
Auto Reset
Automatic CAM Reset – enables the CAM to reset if there are failures in
the descrambling process. This helps the CAM to recover automatically
without requiring the user to reset manually. Auto Reset provides the
following options:
Off – automatic reset is disabled; the CAM can be reset manually.
One – if one or more services have descrambling failures, the CAM will
reset.
Majority – if more than half the services configured to be descrambled in
the CAM fail, the CAM will reset.
All – in this mode, the CAM will simply reset if all services configured in
the CAM fail to be descrambled.
Man Reset
Manual CAM Reset – sometimes resetting the CAM Module is
necessary, e.g. if the CAM is not responding. Click reset to power
recycle the CAM module.
MAX TS rate
[Mbps]
Maximum Transport Stream Range can be used if the rate of the
transponder exceeds the default CAM input rate. The user can choose
one of three values:
• 43 Mbps
• 58 Mbps
• 68 Mbps
The default value is 43; however, not all CAMs support these rates.
6.1.4 Alt CAM Mode
In a normal configuration, when an input stream is sent to the CAM, only a selection of PIDs
that comprise the services being descrambled are actually transmitted, together with CA-
related PIDs listed in the PSI.
In Alt CAM Mode, the entire input stream is sent to the CAM without PID filtering. This feature
can be useful in the following scenarios:
Some CA systems do not list all the required PIDs in the PSI. Often this will involve the EMM
PIDs, resulting in problems keeping the subscription updated over time. Alt CAM Mode can
prevent this problem.
Sending all the PIDs changes the packet timing of data streaming into the CAM to more
closely resemble that of the input. Testing has shown that very few CAMs require this to work
reliably over time.
Not filtering PIDs sent to the CAM simplifies the input card configuration due to all input PIDs
being sent. This may slightly improve response time on service changes. The effect may be
marginal, but it could be of value, especially for inputs where most of the services are
descrambled in the same CAM anyway.
The drawback of Alt CAM Mode is increased bandwidth usage from the input card(s) into the
system. In most systems, this is not a significant limitation; however, it should be taken into
consideration for large systems.
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