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4-12
Programming Commands
Common Commands
*STB?
The *STB (status byte) query returns the current value of the instru-
ment’s status byte.
Syntax
*STB?
Description The master summary status (MSS) bit 6 indicates whether or not the
device has at least one reason for requesting service. When you read
the status byte register, the value returned is the total of the bit
weights of all of the bits set to one at the time you read the byte. The
following table shows each bit in the status byte register and its bit
weight. The *STB? query does not affect the contents of the status byte
register.
Query Response <integer> from 0 to 255.
Example
OUTPUT 720;”*STB?”
ENTER 720;Value
PRINT Value
Table 4-17. Status Byte Register
Bit Bit Weight Condition
7128Not Used
6 64 Master Summary Status (MSS)
5 32 Event Status Bit (ESB)
4 16 Message Available (MAV)
38Not Used
24Error queue status
12Not Used
01Not Used