Confidential
Page 13
bandwidth limitations of your chosen output transport. If you oversubscribe, artifacts may occur on any
program in that transport. More on this topic
below. The Program Number field is used when
you wish to manually set the program number
for this program use this field. If not using the
“auto” selection for this field, be sure to choose
the program number carefully, there cannot be
any duplicate program numbers in a given
transport. The PMT pid and Elements are for
expert use only and should almost always be
“auto”. If the output is configured for US Cable
or ATSC, there are additional fields for PSIP
information. These fields contain data that is
often displayed on the TV when the channel is
first tuned. The Short Name can be up to 7
characters. i.e. WXYZ-12. The Virtual Channel
information will typically override the Physical
Channel information when displayed on a TV.
The Virtual Channel can be a single digit integer
or hyphenated if supplying both a major and minor channel number. You can return to this dialog later
and modify these fields at any time. All changes will take effect immediately. You may need to retune
the TV to see the results.
Oversubscribing the Transport
If the sum total bit rate for all the programs included the output multiplex is more than the specified
maximum bitrate for that transport, clipping will occur to ensure the output does not exceed the
maximum bitrate. Clipping means some packets are not transmitted. Missing packets will cause audio
and video artifacts in one or more of the programs included in that output transport. After selecting and
saving the programs that will be included in your output transport it is best to return to the Outputs tab
of the Overview page to see if the “Utilization” for that output is more than 100%. If it is, then the
number or mix of programs in that multiplex should be trimmed. At times, since video encoding is a
variable bitrate, these errors will be intermittent. To be save, it’s best not to exceed 90% of the
available bandwidth (“utilization”).
Display Controls
Display controls set the channel and
display state of a display that has
been provisioned with a West Pond
RX device such as the RX-WP100.
Each receiver must first be registered
