ILX Lightwave LDC-3700 Series User Manual

3.7.2 Operation Complete Defiiition
Note that bit 0 of the Standard Event Status Register contains the status of the Operation Complcte,flag (see *OX,
Section 3.4.8). Enabling this bit via the *ESE command allows the user to update bits of the status byte. Then, if
the SRE mask has bit 5 set, and the user issues an *OPC command, an SRQ will be issued upon completion of the
currently processed commands.
This may be used to initiate service request routines which depend on the
completion of
all previous commands.
For example, the
user may set the TEC output to 30°C, enable the SRQ on Operation Complete, and have an SRQ
handling routine in the user's software which begins a new measurement after the 30°C value has been reached.
This allows the use of the operation complete features of the LDC-3700 Series Laser Diode Controller, such as the
"TOLerancen commands, without the need for program looping or polling which
can tie up the GPIB.
Operation Complete on the LDC-3700 Series Laser Diode Controller is defined as:
1)
The LASER controller, which is updating the cmnt source hardware, is idle.
2)
The TEC controller, which is updating the temperature controller badware, is idle.
3)
No EEPROM (non-volatile) memory write cycles are in progress.
4)
New LASER current and photodiode measurements are available, updated approximately every
600 mSec.
5)
New TEC sensor and lTE measurements are available, updated approximately every 400 mSec.
6)
No Display time-out clocks are running.
7)
No calibration routines are running.
8)
LASER output is off, or it is on and within tolerance.
9)
TEC output is off, or it is on and within tolerance.
NOTE - Care must be taken when using the *OPC, *OPC?, and *WAI commands
when settling times are long (i.e.
a large step in temperature is made and the
temperature tolerance is tight).
In some cases the operation completion may far
exceed the standard
GPIB time-out setting. If the GPIB times out while waiting
for a response which indicates completion, either set the
GPIB time-out longer or
use SRQ generated interrupts
in the program. See your GPIB manual for time-out
configuration or
SRQ programming setup.
The *OPC, *OPC?, and
*WAI commands should not be used inside a calibration
routine, except to detect the completion (exiting) of calibration. Notice that
Operation Complete criteria
7 will hold the OPC flag false throughout calibration.
If the program waits until the OPC flag is true before entering a calibration value,
it will wait forever.
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ILX Lightwave LDC-3700 Series Specifications

General

Brand	ILX Lightwave
Model	LDC-3700 Series
Category	Controller
Language	English