Spirent DLS 400E3, Operating Manual

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DLS 400E3 Operating Manual
Page 4-8 - Spirent Communications
7104000537 03/04 -2
*IDN? Identification Query
Type: System command
Function: Returns the ID of the unit. Upon receiving this command the host system puts the follow-
ing string into the output queue:
SPIRENT COMM INC,host system,<SN>,<Ver>
where:<SN> is the serial number of the unit
<Ver> is the revision level of the control firmware (always 2 digits)
*OPC Operation Complete
Type: Synchronization command
Function: Indicates to the controller when the current operation is complete. This command causes
the host system to set bit 0 in the Event Status Register (ESR) when all pending operations
are completed. The bit is read with the *ESR? command, which also clear the bit. Com-
munication can proceed as normal after this command, but be prepared to receive SRQ at
any time.
*OPC? Operation Complete Query
Type: Synchronization command
Function: Indicates when the current operation is complete. This causes the host system to put an
ASCII 1 (decimal 49, hex 31) in the output queue when the current operation is complete.
Communication can proceed as normal after this command, but be prepared to receive the
“1” at any time.
*PSC <NRf> Power-on Status Clear
Type: Status and event command
Function: Indicates if the unit should clear the Service Request Enable Register and the Standard
Event Status Register at power-on. If 1 (or higher) then all the enable registers are cleared
at power-on, if 0 then all the enable registers are restored from the non-volatile RAM at
power-on. The factory default is 1 (clear all the enable registers). Any change to the
“Power-on Status” is saved in non-volatile RAM, and is always restored on power up.
*PSC? Power-on Status Clear Query
Type: Status and event command
Function: Return the Power-on Status Clear value. If 1 then all the enable registers are cleared at
power-on, if 0 then all the enable registers are restored from the non-volatile RAM at
power-on. The factory default is 1 (clear all the enable registers).
*RST Reset
Type: Internal command
Function: IEEE 488.2 level 3 reset. This command initializes the host system with the bypass loop,
and cancel any pending *OPC operation. It does not affect the output buffer or other sys-
tem settings of the unit. Note that this is NOT equivalent to the power-up reset and the
IEEE 488 “Device Clear”.
*SRE <NRf> Service Request Enable
Type: Status command