Specifications

136 Glossary
R
Receiver
See ICA.
Relay Sequencing
The process of ensuring relay switching has fully completed before continuing a test action. A “busy bit”,
or status bit, generated by each load card when its relays are switched halts further test actions until the
relay timer has timed out. This allows the slowest relay on a card to complete opening/closing before
continuing a test action. This feature is not implemented in TestExec SL software release A.01.00. The
timing is controlled by the PC.
Remote Sensing
Monitoring the voltage output of a power supply can be done either at the inputs to the Switch/Load Unit
(locally) or at the inputs to the DUT (remotely). Remote sensing guarantees the voltage value set will be
applied at the sense point, and losses in the system will be compensated for.
For example: If the DUT requires precisely 12 vdc applied to it, and there is a 0.5 vdc drop between the
power supply and the DUT due to system and cable losses, setting the voltage sense to remote and
thereby monitoring the power supply output at the DUT will compensate for the voltage drops between
the power supply and the DUT.
Repetitive Mode
The Measurement Control Module (MCM) has an internal timer/counter that is primarily used to time
the open/close of the MCM relays. It can also be used as a trigger source. As a trigger it can either in
either of two modes; it can generate a single-shot pulse, or it can generate a continuous stream of trigger
pulses (repetitive mode).
Routine Type
You can specify either Setup/Cleanup (a combination of the two), or Execute routines. Execute routines
contain a single entry point and typically perform a single action, such as measuring a pulse. Setup/
Cleanup routines can consist of a single Setup routine, a single Cleanup routine, or a paired Setup and
Cleanup routine. Paired Setup/Cleanup routines contain two entry points and typically bracket an
Execute action or series of actions. For example, a Setup routine might put the DUT into a particular
mode (Setup action), an Execute routine could then make a measurement (Execute action), then a
Cleanup routine would return the DUT to idle mode (Cleanup action).
Rs
Sense resistor.
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