Teledyne LeCroy FireInspector - Users Manual - Manual (Page 106)

96
CATC F IRE I NSPECTOR 2.01 C HAPTER 7
User’s ManualTraffic Generation
7.6 Maximum Block Size for Isochronous Data
The maximum block size for isochronous data is shown below:
7.7 Creating Different Traffic Patterns With
Isochronous Data
You can create different types of traffic patterns by setting the data length (datalen) to a
value equal to or less than the size of the data block that you are loading into the buffer. For
example, if you set the data length to 8 bytes and then load a 32-byte data block into the
buffer, FireInspector will read the first 8 bytes of the block and send them out as a packet,
then read the next 8 bytes and send them out as a second packet, and so on, until all 32 bytes
have been sent. Then the cycle repeats. If, however, you set the data length value to be equal
to the buffer size, FireInspector sends a stream of identical packets made up of the entire
data block. Thus, if you set the data length to 32 bytes and load a 32-byte data block into the
buffer, FireInspector will then send out the entire data block in each packet.
Maximum buffer size: 16K per channel
Maximum number of channels: 4
Maximum data length size: 4K-1 or 4095 bytes
7.8 Editing Tools in FireInspector
Several editing tools for traffic generation files can be accessed via the Trace file pop-up
menus. For more information about the menus, please see “Cell Context Menus” on
page 74.
7.8.1 Edit Packet
The Edit Packet command is found on the Trace file cell context menu. It opens an Edit
Packet dialog, which allows you to edit the packet data.
Cable Speed Maximum Data Payload Size (in bytes)
100 Mb/s 1024
200 Mb/s 2048
400 Mb/s 4095
Note: the 1394 specification allows for a
maximum of 4096; however, this is not
possible with FireInspector, due to a hardware
limitation.