HP E8491A manual Chapter

Chapter 3
VXI Programming Using the IEEE 1394 Serial Bus	35
Using this Chapter	35
Programming Register-Based and Message-Based VXI Instruments	35
Opening Instrument Sessions	35
Optimizing Programs	36
Block Data Transfers	36
Block Transfers using HP VXIplug&play Drivers	37
Block Transfers using HP VISA	40
HP E8491A Triggering	43
Using Triggers	43
Configuring the E8491A Trig In and Trig Out Ports	44
Triggering Example	45
Trigger Pull Up	47
Using HP E8491A Shared Memory	47
Locating E8491A Shared Memory	47
Example Programs	49
Storing Readings in Shared Memory - HP VISA Example	50
Storing Readings in Shared Memory - SICL Example	54
Chapter 4
IEEE 1394 Fundamentals and
Interface Overview	57
Using this Chapter	57
IEEE 1394 Topology and Terminology	57
Features of the IEEE 1394 Bus	58
Optimizing the Configuration	59
IEEE 1394 Data Transfer Protocol	59
Asynchronous Data Transfers	60
Fair Arbitration Protocol	60
VXI Data Transfers	60
The Adaptec® AHA-8940 Host Adapter and Interface Cable	61
The HP E8491A PC to VXI Interconnect	62
Using the HP E8491A with the HP E1406 Command Module	64
The HP I_O Libraries	64
Appendix A
Specifications	65
Interface Characteristics	65
VXI Characteristics	65
General	65
CLK 10	66
External Trigger Input	66
External Trigger Output	66
Trigger Delays	67
Cooling	67
Power Supply Loading	67

2 Contents