Agilent Technologies B2902 Manuale di Servizio Pagina 263

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Agilent B2900 SCPI Command Reference, Edition 2 4- 141
Subsystem Commands
:SYSTem:LOCK:REQuest?
Remarks When a lock is active, Bit 13 in the Standard Operation Register will be set (see
:STATus:<MEASurement|OPERation|QUEStionable>:CONDition? command).
When the lock is released on all I/O interfaces, this bit will be cleared.
Note that for each successful lock request, a lock release is required. Two requests
require two releases.
:SYSTem:LOCK:REQuest?
Requests a lock of the current I/O interface. This provides a mechanism by which
you can lock the instrument's configuration or cooperatively share the instrument
with other computers.
Syntax :SYSTem:LOCK:REQuest?
Query response response <newline>
response returns 1 if the lock request is granted, or 0 if denied.
Example :SYST:LOCK:REQ?
Remarks Lock requests can be nested, and each request increases the lock count by 1. For
each request, you will need to issue a release from the same I/O interface (see
:SYSTem:LOCK:RELease command).
Instrument locks are handled at the I/O interface level (GPIB, USB, LAN, etc.), and
you are responsible for all coordination between threads and/or programs on that
interface.
When a request is granted, only I/O sessions from the present interface will be
allowed to change the state of the instrument. From other I/O interfaces, you can
query the state of the instrument, but no measurement configuration changes or
measurements will be allowed.
Locks from LAN sessions will be automatically released when a LAN disconnect is
detected.
When a lock is granted, Bit 13 in the Standard Operation Register will be set (see
:STATus:<MEASurement|OPERation|QUEStionable>:CONDition? command). In
addition, the entire instrument front panel, including the Local key, will be locked
down while a lock is in place (“KEYBOARD LOCKED” is displayed).
:SYSTem:PON
Specifies the power-on state.
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