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N9340B Programmer's Guide
The standard event status register contains following bits:
Bit Description
0 Unused
1 Request Bus Control: This bit is always set to 0. (The analyzer
does not request control.)
2 Query Error: A 1 in this bit position indicates that a query error
has occurred. Query errors have SCPI error numbers from 499 to
400.
3 Device Dependent Error: A 1 in this bit position indicates that
a device dependent error has occurred. Device dependent errors
have SCPI error numbers from –399 to –300 and 1 to 32767.
4 Execution Error: A 1 in this bit position indicates that an
execution error has occurred. Execution errors have SCPI error
numbers from –299 to –200.
5 Command Error: A 1 in this bit position indicates that a command
error has occurred. Command errors have SCPI error numbers from
–199 to –100.
6 User Request Key (Local): A 1 in this bit position indicates
that the [Preset/System] (Local) key has been pressed. This is true
even if the analyzer is in local lockout mode.
7 Power On: A 1 in this bit position indicates that the analyzer has
been turned off and then on.
The standard event status register is used to determine the
specific event that set bit 5 in the status byte register. To
query the standard event status register, send the command
*ESR?. The response will be the decimal sum of the bits
which are enabled (set to 1). For example, if bit number 7
and bit number 3 are enabled, the decimal sum of the 2 bits
is 128 plus 8. So the decimal value 136 is returned.
In addition to the standard event status register, the
standard event status group also contains a standard event
status enable register. This register lets you choose which
bits in the standard event status register will set the
summary bit (bit 5 of the status byte register) to 1. Send the
Status Registers
3
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