Keithley 2897 3700 ScriptAppNote free download

File name 2897_3700_ScriptAppNote.pdf

Number 2897 Application Note Comparing a Series 7000 Series SCPI Application to a Series 3700 Script Application Introduction The SCPI Instrument Model Some measurements require direct control over an instrument's For many years, instrument manufacturers have used "Standard hardware. To provide this control, SCPI-based instruments con- Commands for Programmable Instrumentation" or SCPI to con- tain command subsystems that control particular instrument trol programmable test and measurement devices in instrumen- functions and settings. These commands trade interchangeably tation systems. SCPI provides a uniform and consistent language for fine control. The ability to configure instruments and make for the control of test and measurement instruments. The same measurements with different degrees of control is a major advan- commands and responses control corresponding instrument tage of SCPI. functions in SCPI equipment, regardless of the manufacturer or the instrument type. The SCPI Instrument Model controls the way instrument functionality is divided among the SCPI command subsystems. By design, Keithley's new Series 3700 System Switch/ In the case of Series 7000 instruments, the command subsystems Multimeter instruments do not use SCPI commands. Instead, are broken down into the following categories: instruments on this platform use an internal Test Script 1. DISPlay: Controls the display of the 700X. Processor (TSP) to process and run programs called "scripts." 2. OUTput:Controls the polarities of the digital output port. The motivation to migrate toward the use of TSP was to address 3. ROUTe: Controls the signal routine through the switch today's more demanding system throughput requirements. system. Communication with any TSP-based instrument is much the same as interfacing to a conventional instrument, using commer- 4. SENSe: Used to read the digital input ports. cially available software applications and an application develop- 5. SOURce: Controls the logic level(True or False) of eac