EPIC Device Support Ethernet Scope

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EPIC Device Support Ethernet Scope
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LeCroy Benefits

• Faster network communication than GPIB

• Easy to conform to the Ethernet standard

• Portability Driver is based on BSD4.3
• network sockets.

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LeCroy LT364 Specification

• Sample Rate
• 500 MS/s using 4 channels
• 1 GS/s using 2 channels

• Sensitivity
• 2 mV 10 V/div fully variable
• clock accuracy lt 10 ppm
• interpolator resolution 5ps

• Computing Hardware
• Power PC _at_ 160 MHz
• 16 MB RAM
• 10Base-T, GPIB, serial port

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Topology
EDM
Ethernet
Scope
Scope
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Database Records Functionality

• reset

• loading / saving

• panel setup

• link status recovery

• disabling of channels

• voltage / time divisions

• waveform timestamps

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Record Support

• asynchronous (parallel)
• vxWorks task spawn/message queue
• Each scope assigned a task

IOC
Scope A
Task A
Client
Scope B
Task B
Scope C
Task C
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Parallel 10Hz and 4Hz
4Hz
10Hz
IOC
Scope A
Task A
Client
Scope B
Task B
Scope C
Task C
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Parallel 10Hz and 10Hz
10Hz
10Hz
IOC
Scope A
Task A
Client
Scope B
Task B
Scope C
Task C
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Record Support Continued

• Macro definitions for multiple scope support

• mbbi/mbbo obtained from driver to allow for
  different
• driver configurations

• Recover link to recover from network disruptions

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IOC Benchmark

• MVME 2100 , Power PC _at_ 200MHz
• 5 scopes w/ 4 waveforms each 20 waveforms
  (1000 point)
• Updating _at_ 6 Hz

Results

• 0 clients 25 CPU

• 1 client 35 CPU

• 6 clients 42 CPU

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EDM Screen
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Contacts
Seth Nemesureseth_at_bnl.gov Sheng
Peng..peng_at_bnl.gov Larry Hoff..hoff_at_bnl.gov