Cobalt Digital COMPASS 9223 Dual-Channel 3G_HD_SD MPEG-4 Encoder User Manual
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9223-OM (V2.0)
Connections section, later in this document. The ASI Output Parameters are:
•
Port Name: All 9223 encoders and outputs can be assigned a user-defined Port Name.
This name is used to identify the port later when making connections. Use any
descriptive name suitable for your application, or accept the default.
•
Packet Size: Select between 188 and 204 bytes.
•
ASI Rate: The following two modes are available:
o
Manual: In this mode, the ASI output bit rate is set to the value entered in the Bit
Rate field. The ASI output will maintain this rate at all times, as follows:
If there is no connection to the ASI port, or if the input connected to the
ASI port is not active, the ASI port will transmit NULL packets.
If the connected input bit rate is lower than the rate entered in the Bit Rate
field, the ASI port will add NULL packets as required to pad it to the
desired value. PCR packets will be re-stamped as required.
If the connected input bit rate is higher than the rate entered in the Bit
Rate field, the ASI port will attempt to remove NULL packets from the
connected bitstream in order to achieve the desired value. PCR packets
will be re-stamped as required. If there are not enough NULL packets to
be deleted, packets will be dropped, and an alarm will be raised. This
alarm will be indicated in the Dashboard™ Card State field, in the front
Status LED, and in the ASI Statistics page.
o
Automatic: If this mode is selected, the Bit Rate field disappears. The ASI
output will exactly match the rate of the connected bitstreams. However, if the
connected ports have no data, or if there is no connection to the ASI port, there
will be no output, and any connected downstream ASI device will indicate loss of
sync. The ASI Statistics page will indicate this state, as well as the rear I/O panel
indicator LED. Note that an alarm will only be raised if there is at least one
connection to the ASI output.
•
Bit Rate: This field is only available if the ASI Rate mode is set to Manual. Enter the
desired ASI output bit rate here, in bits/second. The minimum value is 64,000 and the
maximum value is 213,000,000.
Once the port is configured, click on the Apply button, and the configuration takes effect.
ASI Ports: Statistics Tab
The Statistics Tab for the ASI Ports provides a quick visual summary status for the ports. A
sample, corresponding to the table example of the previous section, is depicted below.
Each of the ASI Port indicators can have the following values: