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IEEE 488.2 Command Reference
USBTMC/USB488 Universal Commands
DCL
The DCL (Device Clear) command causes all USB instruments to assume a
cleared condition. The definition of device clear is unique for each instrument.
For the power sensor:
• All pending operations are halted, that is, *OPC? and *WAI.
• The parser (the software that interprets the programming codes) is reset
• The output buffer is cleared.
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and now expects to receive the first character of a programming code.
U2000 Series Programming Guide