Units; Status System & Srq - Agilent Technologies X Series User Manual

Getting Started
SCPI Language Compatibility Application General Rules and Limitations

Units

The N9062A/W9062A application supports the following standard units. Any units supported by
FSE/FSP/FSU commands that are not supported by the application are noted in the table and details
found in Chapter 3 , "Compatible SCPI Commands," on page 37.
Frequency Units: HZ, KHZ, MHZ, GHZ
Amplitude Units: DB, DBM, DBUV, DBMV, DBUA, V, A, W
Time Units: KS, S, MS, US, NS
Status System & SRQ
The STATus subsystem is a remote-only command structure that allows a controller to determine the
operating status of the instrument. The system can also allow the instrument to request service from the
controller on an interrupt basis. The system is a complex hierarchy, where specific details of an
instrument's condition are summarized upward to higher level registers. The use of this system is
optional, and your programs may vary widely in the depth to which you use it.
The topmost Status Byte Register, Standard Event Status Register, and their SRQ behavior, are specified
by IEEE 488.2 standard. The N9062A/W9062A application adopts the Status system of the Agilent
X-Series analyzers, which conforms to the IEEE 488.2 standard and behaves like that of any
IEEE488.2-compliant instrument (including the FSE, FSP, or FSU). These status conditions, events, or
commands should emulate any compliant instrument, for example:
• operation complete, *OPC and *OPC?
• Status Byte bits, including Error/Event reporting, plus *CLS, *STB
• Standard Event Status Register bits, plus *ESE, *ESR, *PSC
• SRQ behavior and *SRE mask
• most error conditions (top level), plus STATus:QUEue? and SYSTem:ERRor? queries
• use of STATus:OPERation and STATus:QUEStionable commands, although specific bits may be
mapped differently
At lower levels of details, different vendors have implemented their status systems differently.
Therefore, if a program (written for FSE/FSP/FSU) makes deep or sophisticated use of the status
subsystem, it may not run correctly with N9062A/W9062A and so require modification. The top
differences include (but are not limited to) the following:
• RF & IF Overload condition
• parallel polling, IST-flag (Individual Status), and PPE (Parallel Poll Enable) mask
• limit or limit margin mask failure reporting
• sweep break feature (of a multi-sweep measurement)
• specific error message numbers, specific error message text
• status conditions associated with Screen B (specifically)
For more information about the X-Series Status system, see SA Programmer's Guide.
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