Lok-to-Clock Electronics
8-19
Examples:
LDLY 10000sets the delay to 10000
LDLY? the system would respond “10000<LF>”
:LDLY 100is ignored, because of the leading colon
:FREQ:UP and :FREQ:DN—“jog” the coarse cavity length control to bring
the laser to a slightly higher or lower repetition rate when the loop is not
locked. The change in repetition rate is approximately 15 Hz. If the loop is
locked, the net effect will be to move the
PZT operating position until the
servo pushes it back toward center.
The following SCPI commands are not valid for use with the Model 3930
because the bits in these registers are defined by SCPI with meanings that
do not apply. Event and condition queries will always return “0<LF>”.
:STATus
:OPERation
:EVENt?
:CONDition?
:ENABle
:ENABle?
:QUEStionable
:EVENt?
:CONDition?
:ENABle
:ENABle?
:STATus:PRESet
—performs the following:
a. Sets the STAT:OPERation and STAT:QUES event enable registers to 0.
b. Has no effect on the STAT:OPER and STAT:QUES event registers.
c. Has no effect on the error/event queue.
d. Has no effect on the Standard Event Status Register (*ESE?), ser-
vice request enable (*SRE?), or status byte (*STB?) registers.
:SYSTem:ERRor?—returns the next entry in the error/event queue. The
return format is <number><comma><“description”>.
For example,
–100,”Command Error”
:SYSTem:VERSION?—returns “1994.0”, which corresponds to the relevant
version of the SCPI standard.
This command and query are the only ones which do not allow the nor-
mal flexibility of the SCPI standard. The command/query must be the
only item before the
<CR> or <LF> termination. No error is generated if
commands/queries are not properly formatted. Commands/queries may
not be combined on one command line.
Note
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