Tsunami Mode-Locked Ti:sapphire Laser
8-20
*CLS
—performs the following:
a. Clears the Standard Event Status Register (SESR).
b. Clears the STAT:OPER event status register.
c. Clears the STAT:QUES event status register.
d. Clears the error/event queue.
e. Updates the status byte to reflect these changes.
*ESE <parameter> and *ESE?—set/read the Event Status Enable Register
(ESER). This is used as a mask for the bits in the Standard Event Status
Register (SESR), which is read with the *ESR command. Both the parame-
ter and the return value are in the range 0 to 255.
*ESR?—reads and clears the Standard Event Status Register (SESR). The
value is in the range 0 to 255.
*IDN?—returns the product identification string. This string contains four
fields, separated by commas. The fields are, in order from left to right, the
manufacturer, the product, the serial number of the product (optional) and
the firmware revision of the product (optional). A typical response from the
Model 3930 is “Spectra Physics,3930,0,1.00”
*OPC—is one of the synchronization commands, and indicates that the
product should set the Operation Complete (OPC) bit when the current
operation is finished. Since this device implements only sequential com-
mands, the “current operation” is the interpretation of this command; thus,
the OPC bit is set immediately.
*OPC?—returns a “1” when the operation is complete (when this command
has executed).
*RST—resets the Model 3930. Reset means:
a. The loop is turned off (if on)
b. The status structures are not affected.
c. The delay setting (DLY) is set to zero.
d. The long delay setting (
LDLY) in the Model 3931 is not affected.
*SRE <parameter> and *SRE?—sets/reads the Service Request Enable
(SRE) mask register. Note that bit 6 is ignored (decimal value 64), since
that is the service request bit of the status byte. Both the parameter and the
return value are in the range 0 to 255.
*STB?—reads the status byte. The returned value is 0 through 255. The bits
in the status byte are:
Bit Name Comments
0 ACQ 1 if the system is in acquisition mode
1 LON 1 if the loop is on
2 QUEUE 1 if the error/event queue is not empty
0 if the error/event queue is empty
3 QUES Summary bit for the STAT:QUES condition
(EVENT????) register
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