AEQ Audio Over IP
Routing System
67
• "Preferred": 'No' indicates that the card has not been set to preferred master mode.
'Yes' indicates that the card is set to preferred master mode.
• "Frequency Offset": Indicates the offset from the network clock master measured in
parts-per-billion.
"Interfaces": Provides the following information about the primary network interface (P) and the
secondary network interface (S):
• "IP address": The IP address currently assigned to the interface.
• "MAC address": The Media Access Control address of the interface, associated with
the Ethernet layer.
• "Tx Utilization": Shows the current total transmit bandwidth in use.
• "Errors": (on the same line as Tx utilization) shows the number of transmit Cyclic
Redundancy Check (CRC) or packet errors detected since the device was last started.
• "Rx Utilization": Shows the current total reception bandwidth in use.
• "Errors": (on the same line as Rx utilization) shows the number of receive Cyclic
Redundancy Check (CRC) or packet errors detected since the device was last started.
NOTE 1: The "Rx Utilization" includes not only network traffic destined for the Dante device, but
any other multicast or broadcast traffic received at this network interface.
NOTE 2: As a rule of thumb neither the "Rx Utilization" nor the "Tx Utilization" should exceed
about 85% of the link speed in order to guarantee good clock synchronization performance
(links are full duplex).
The button "Clear Counters" allows you to reset the packet errors history for the device.
The graphic also indicates the speed and connected state of the interface as follows:
Indicates that the link is operating at 1Gbps.
Indicates that the link is operating at 100Mbps.
Indicates that the link is not connected, or that there is an error. The IP address will
read N/A, and Tx and Rx utilization will be 0 kbps.
The information about the secondary network interface will only be displayed if the device
supports redundancy and it’s configured as redundant.
4.8.3.4. "Latency".
For supported devices, the "Latency" tab displays histograms of audio packet latency for each
transmitter that the device is subscribed to.
Newer Brooklyn II (featured in AEQ multichannel devices) and PCIe devices support latency
monitoring in "Dante Controller". You can check your device type in the "Device Info" tab under
"Network View".
About Latency and Packet Loss.
Latency is used to account for the delay between an audio packet leaving the transmitter,
traversing the network (potentially through multiple switches) and reaching the receiver.
If a receiver's latency setting is too low, audio packets will not have time to get from the
transmitter to the receiver before they are supposed to be played out. When this happens, the
receiver will drop packets (i.e. it will throw packets away, because they are 'late to the party').
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