Specifications

Glossary 131
HV Interlock
High Voltage Interlock interrupt that disables the high voltage amplifier of the Measurement Control
module.
I
ICA
Interface Connector Assembly - The system half of the mass interconnect. May also be called the
receiver or fixture receiver.
Interface Connector Blocks
The connectors between the ICA and the ITA.
Instrument Handler
An additional layer of software between Agilent TestExec SL and a device driver. By providing a set of
well-known functions through which the Test Executive software communicates with device drivers, an
instrument handler enhances Agilent TestExec SL's ability to control devices.
Interlock Event
An interrupt generated when the high voltage safety interlock circuit is opened.
ISA
Standard PC data bus.
Isense + and Isense -
The Switch/Load Unit has a two-line current sense bus along the its backplane. This Current sense bus
can be broken into as many as four discrete buses by removing jumper plugs on JP1, JP2, and JP3.
Current sensing is performed on any load card channel across a four-terminal current sense resistor. Two
load cards are designed to connect to the current sense bus in the Switch/Load Unit: The 8-Channel, and
16-Channel High Current Load Cards. Each channel's current sense lines are multiplexed so that on each
card only one channel at a time can be connected to the Switch/Load Unit current sense bus.
Isolated Inputs
Inputs that have the common connected to system ground.
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