Specifications

Chapter 2 Command System RIGOL
M300 Programming Guide 2-99
READ?
Syntax
READ?
Description Change the trigger status of the instrument from the "idle" state to the
"wait-for-trigger" state. The instrument starts scanning when the specified trigger
conditions are satisfied. Readings are sent to the reading memory and output buffer
during the scan.
This command have to be used with the following modules.
 MC3120: 20-Channel Multiplexer
 MC3132: 32-Channel Multiplexer
 MC3164: 64-Channel Single-Ended Multiplexer
 MC3232: 32-Channel Reed Multiplexer
 MC3264: 64-Single-Ended Reed Multiplexer
 MC3324: 20-Voltage Channel+4-Current Channel Multiplexer
 MC3534: Multifunction Module
Explanation  Sending the READ? command is similar to sending the INITiate command followed
immediately by the
FETCh? command.
 For scan measurements using the multiplexer modules, an error is generated if the
DMM module is disabled (refer to the
INSTrument:DMM command) or not installed
in the mainframe. The DMM module is not required for operations on the
multifunction module.
 Each reading returned may or may not contain the measurement units, time stamp,
channel number and alarm status information, depending on the settings of the
FORMat Command Subsystem commands.
 The READ? query is not valid with the
*TRG command.
 The instrument clears all the readings in the reading memory after a Factory Reset
(the
*RST command), after an Instrument Preset (the SYSTem:PRESet command),
or when mainframe power is cycled (the power-on value is set to “Default”, refer to
the SYSTem:UTIlity:CONFigure:POWEron command)).
Return
Format
The query returns the measurement readings (the format is set by the FORMat
Command Subsystem commands) in scientific notation. Multiple return values are
separated by commas.
Example CONF:VOLT:DC 20,DEF,(@401:403)
ROUT:SCAN (@401:403)
TRIG:SOUR IMM
READ?
The query returns +3.061584378E-03,+3.338635854E-03,+3.335876377E-03.
Related
commands
FETCh?
INITiate
ROUTe:SCAN