HP 53150A Series Programming Manual page 141

Chapter 4 Command Reference
:SYSTem Subsystem
• The queue is cleared (emptied) on *CLS, power-on, or upon reading he
COMMENTS
last error from queue.
• If the Error Queue overflows, the last error in the queue is replaced
with the error -350, "Queue overflow". Any time the queue overflows,
the least recent errors remain in the queue and the most recent error
is discarded. The maximum length of the Error Queue is 30.
• The Error Queue is unaffected by *RST and *SAV/RCL. It is cleared
by *CLS.
None
RELATED
FRONT-PANEL
KEYS
:SYSTem:KEY:CATalog?
COMMAND
This query returns a list of the Counter's keys that have command
equivalents. The response is a definite-length block that lists the key
codes and their meanings. There is no command version.
None
RELATED
FRONT-PANEL
KEYS
:SYSTem:KEY . . . <numeric_value>
COMMAND
This command simulates the pressing of a front-panel key. The
<numeric_value> is a key-code value.
This command puts an entry in the Key Queue (just as any front-panel
key-press does). There is no query version of this command.
The keys and their corresponding key codes are listed in Table 4-3.
Programming Guide 4-41