EDM01-36v10 DAG_9.2X2_Card_User_Guide
ii ©2010 - 2012 Endace Technology Ltd. Confidential - Version 10 - May 2012
Using your DAG card 37
Introduction .......................................................................................................................................... 37
Basic data capture ................................................................................................................................. 37
Starting a capture session ................................................................................................................... 37
dagsnap ............................................................................................................................................. 38
Capturing data at high speed ............................................................................................................... 39
Viewing captured data ........................................................................................................................... 40
dagbits ............................................................................................................................................... 40
dagbits tests ....................................................................................................................................... 42
Converting captured data ....................................................................................................................... 43
dagconvert ......................................................................................................................................... 43
Using third party applications ................................................................................................................. 47
Transmitting captured data .................................................................................................................... 47
Configuration ...................................................................................................................................... 47
Explicit packet transmission ................................................................................................................. 47
Trace files .......................................................................................................................................... 48
TR TERF ............................................................................................................................................. 48
Synchronizing clock time 51
Overview ............................................................................................................................................... 51
DUCK configuration ................................................................................................................................ 51
Common synchronization ....................................................................................................................... 51
IRIG-B ................................................................................................................................................ 51
Network Time Protocol ........................................................................................................................... 52
Timestamps ........................................................................................................................................... 53
Example ............................................................................................................................................. 53
Readable DUCK ..................................................................................................................................... 54
Reading the current DAG time ............................................................................................................. 54
Performance ....................................................................................................................................... 54
Dagclock ............................................................................................................................................... 55
Card with timing reference ..................................................................................................................... 59
Overview ............................................................................................................................................ 59
Pulse signal from external source ......................................................................................................... 59
Testing the signal ............................................................................................................................... 59
Single card no reference......................................................................................................................... 60
Two cards no reference .......................................................................................................................... 61
Overview ............................................................................................................................................ 61
Synchronizing with each other ............................................................................................................. 61
Synchronizing with host ....................................................................................................................... 61
Connector ............................................................................................................................................. 62
Overview ............................................................................................................................................ 62
Pin assignments .................................................................................................................................. 62
Data formats 65
Overview ............................................................................................................................................... 65
Generic ERF header ............................................................................................................................... 66
ERF 2. TYPE_ETH .................................................................................................................................. 68
Extension Headers (EH) ......................................................................................................................... 69
Introduction........................................................................................................................................ 69
Guidance for stream buffer sizing 71
Selecting stream buffer size .................................................................................................................... 71
Burst duration ..................................................................................................................................... 71
Latency .............................................................................................................................................. 72
Multiple streams .................................................................................................................................... 72
Calculating the stream buffer size ........................................................................................................... 72
Example 1 .......................................................................................................................................... 73
To Next Page
Loading...