BNC 645 - Manual (Page 150)

150
MEMory:STATe:VALid? {0︱1︱2︱3︱4}
Query the specified storage location to determine if it currently stores a valid
instrument state. “0” is returned when there is no valid state stored in that
location and “1” is returned when there is a valid state stored in that location.
MEMory:NSTates?
Query the number of storage locations available for storing the states. “5” is
returned.
-- O --
*OPC
Set the “Operation complete” bit (bit 0) in the Standard Event Register after all
of the previous commands have been completed. Other commands may be
executed before the bit is set. This command is used in the triggered sweep or
triggered burst modes to provide a way to poll or interrupt the computer when
the *TRG command is complete.
*OPC?
Returns “1” to the output buffer after the previous commands have been
completed. Other commands can not be executed until this command
completes.
OUTPut {OFF|ON}
Disable or enable the Output connector on the front panel. The default is OFF.
The Output key is lit when enabled.
•
The APPLy command overrides the current OUTP command setting and
automatically enables the Output connector.
• The Output connector will be disabled when an excessive external voltage
is applied to it. To re-enable it, remove the excessive voltage and use this
command to enable it again.
• This command changes the state of the output connector by switching the
output relay. However, this command does not zero the voltage to be
output before switching the relay. Thus, the output signal may have
“glitches” for about a millisecond until the signal stabilizes. You can
minimize these glitches by first setting the amplitude to the minimum
(using the VOLTage command) and the offset to zero (using the