Agilent Technologies EPM-P Series Programming Manual page 597

Bit
3
4
5
6
7
PPU
The PPU (Parallel Poll Unconfigure) command disables the power meter
from responding to a parallel poll. This is effectively a universal disable.
SDC
The SDC (Selected Device Clear) command causes all GPIB instruments 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 now expects to receive the first character of a programming
code.
• The output buffer is cleared.
SPD
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.
EPM-P Series Power Meters Programming Guide
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Weight Meaning
8 Sense bit
0 - response bit is cleared during a
parallel poll if requesting service
1 - response bit is set during a
parallel poll if requesting service
16 Always 0
32 Always 1
64 Always 1
128 Always 0
IEEE488.2 Command Reference
Universal Commands
16-5