Keysight N1911A Programming Manual page 757

P-series power meters

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The SDC (Selected Device Clear) command causes instruments using GPIB in the

listen state, to assume a cleared condition. The definition of a selected device

clear is unique for each instrument. For the power meter:

– All pending operations are halted, that is, *OPC? and *WAI.

– The parser (the software that interprets the programming codes) is reset and

– The output buffer is cleared.

The SPD (Serial Poll Disable) command terminates the serial poll mode for the

power meter and returns it to its normal talker state where device dependent data

is returned rather than the status byte.

The SPE (Serial Poll Enable) command establishes the serial poll mode for the

power meter. When the power meter is addressed to talk, a single eight bit status

byte is returned.

N1911A/1912A P-Series Power Meters Programming Guide

now expects to receive the first character of a programming code.

IEEE 488.2 Command Reference

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