Keithley S46 Instruction Manual page 62

S46/S46T Microwave Switch System Instruction Manual
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*IDN? — identification query
The identification code includes the manufacturer, model number, serial number, and
firmware revision levels. Identification codes vary with the model number, output formats
and output types. Power supplies set for the exponential output format and Keithley
Instruments output types have the following codes:
System 46
KEITHLEY INSTRUMENTS INC., sss, xxxxxxx, yyyyy
Where:
*OPC — operation complete
*OPC? — operation complete query
When *OPC is sent, the OPC bit in the standard event register will set after all pending
command operations are complete. When *OPC? is sent, an ASCII "1" is placed in the
output queue after all pending command operations are complete.
The following syntax rules explain how to use *OPC and *OPC? with other commands:
NOTE
Bit B4, Execution Error (EXE) — A set bit indicates that the S46/S46T detected
an error while trying to execute a command.
Bit B5, Command Error (CME) — A set bit indicates that a command error has
occurred. Command errors include:
– IEEE-488.2 syntax error — S46/S46T received a message that does not follow
the defined syntax of the IEEE-488.2 standard.
– Semantic error — S46/S46T received a command that was misspelled, or
received an optional IEEE-488.2 command that is not implemented.
Bit B6 — Not used.
Bit B7, Power ON (PON) —A set bit indicates that the S46/S46T has been turned
off and turned back on since the last time this register has been read.
sss is the system (S46 for both S46 and S46T)
xxxxxxx is the serial number.
yyyyy is the firmware revision level of the digital board ROM.
Send *OPC or *OPC?, separated by a semicolon, on the same line as another
query. If sent on separate lines, an error occurs. The *OPC? can be sent on the
same line with a command that is not a query, or on a separate line as a
command (not a query).
Operation
Reads identification code
Sets OPC bit
Places a "1" in output queue
S46-901-01 Rev. C / January 2006
3-27