Agilent Technologies U2300A Series, Programming Manual

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6 IEEE-488 Common Command
48 U2300A Series USB DAQ Programming Guide
*STB?
Syntax
*STB?
This command queries the condition register for the Status Byte Register
group. This command is similar to a Serial Poll but it is processed like any
other instrument command. This is a read- only register and the bits are
not cleared when you read the register.
Remarks
• The following table lists the bit definitions for the Status Byte Register.
• Use the <enable_value> parameter to specify which bits will be enabled.
The decimal value specified corresponds to the binary- weighted sum of
the bits you wish to enable in the register. For example, to enable bit 1
(decimal value = 2), bit 3 (decimal value = 8), and bit 6 (decimal value
= 64), the corresponding decimal value would be 74 (2 + 8 + 64).
Bit Number Decimal Value Definition
0 Not used Not used Always zero
1 Not used Not used Always zero
2 Error Queue 4 One or more errors have been stored in the Error Queue
Use the SYSTem:ERRor? command to read and delete
errors
3 Not used Not used Always zero
4 Message Available 16 Data is available in the instrument's output buffer for
single SCPI query but not for continuous acquisition
output buffer
5 Standard Event Summary 32 One or more bits are set in the Standard Event Register
(bits must be enabled, see
*ESE command)
6 Master Summary 64 One or more bits are set in the Status Byte Register and
may generate a Request for Service (RQS)
Bits must be enabled using the *SRE command
7 Not used Not used Always zero