User manual

G-2 E6198B Switch/Load Unit User Manual
G Glossary Of Terms
•Adjustment
An adjustment is an action performed in the field to modify
an instrument's response to some input. It can usually be
performed by the user on-site.
•Calibration
A standardized maintenance procedure designed to ensure
system accuracy. In this manual it refers to removing those
items that require calibration - the DVM and the Frequency
Counter - and shipping them to an Agilent bench site for
calibration.
• Card
Plug-in devices that are installed into either the Switch/Load
Unit or a VXI mainframe.
• Common Line
This refers to the power bus side of a load on the 24-Channel
Load Card. A line is run back up to the UUT load side of the
card, and jumpering a channel's internal load terminals
allows the user to utilize the load switch as a GP relay.
• Current Sensing
Determining the current through a fixed, known-value
resistor, using the four-wire measurement method and
deriving the current in amperes via the equation: I=E/R.
•Duty Cycle
That portion of a cycle when components are actually being
used. For example: A component that can carry 10A with a
10% duty cycle, and with a cycle equal to 1 second, could
carry 10A for 100ms, then 0A for 900ms.
• Flyback Protection Device
Any device that controls the magnitude of positive or
negative-going voltage spikes on a channel.
• Flyback Voltage
The voltage surge experienced when current flow through a
coil is abruptly stopped or started.
•Form C Relay
Standard terminology for Single-Pole, Double Throw (SPDT)
relay contacts.