Teledyne LeCroy Sierra M6-2 SAS_SATA Protocol Analyzer User Manual - Manual (Page 25)

Sierra M6‐2 SAS/SATA Protocol Analyzer User Manual 23
Expandability Teledyne LeCroy
1.9 Expandability
You can expand by:
 Cascading with STX SYNC Expansion Cards
 Cascading with CATC SYNC Expansion Cards
 Using the Power Expansion Card
You can remove expansion cards with two simple tools.
Cascading and Memory Size
For example, you have two units. The first one has 2 GB memory. The second one has
4 GB memory. The system shows the entire memory as 6 GB. If you set buffer size to 6 GB,
the system programs the first board for 2 GB and the second board for 4 GB. You can
consider this ratio when you set buffer size to any value. For example, if you set buffer
size to 2 GB, the system programs the first board for 
(2*2)/6 GB and the second board for (2*4)/6 GB. Any unit that has more memory will have
larger buffer size.
1.9.1 Cascading with STX SYNC Expansion Cards
You can use cascading of analyzer units for higher port count, by daisy chaining the units
through the provided Expansion and Clock In/Out interfaces on the analyzer back.
Connect “Out” connectors to “In” connectors of the next unit in the chain, for both Signal
and Clock interfaces. You must provide external hubs
for connecting the host machine to
these units using USB or Ethernet. You can cascade up to eight units. Use the STX SYNC
Expansion Cards to sequentially trigger the State Machine in Advanced mode.
If you mix Sierra M6‐4, Sierra M6‐2, and STX A6‐4 analyzers/emulators, put Sierra boards
first, then STX.
Note: Because chain connections for cascading boards cause delay of signals, traffic on different
boards is not completely time synchronized, with about one DWORD difference between
consecutive boxes.
Cascading
To set up the units in a cascade:
1. Connect all units to the host machine using either USB or Ethernet cables. You can
use hubs.
2. Locate the Expansion and Clock ports on the back of each unit.
Figure 1.6: Expansion and Clock Ports