ILX Lightwave LDC-3700C Series, Руководство пользователя, Страница: 71 / 176

R E M O T E O P E R A T I O N
Command Syntax
04_09 LDC-3700C Series
55
C H A P T E R
3
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Status Reporting
This section contains information that is relevant for understanding instrument
error and status reporting. It also contains information regarding the use of the
instrument status for generating interrupts for interrupt driven programs or
subroutines. Understanding the Operation Complete definition for the instrument
is useful for programming synchronization. The Output Off Register section also
contains information on configuring the conditions which force the laser current
source and/or TEC output off.
Event and Condition Registers
In addition to the required IEEE488.2 status reporting structures, the LDC-3700C
remote interface provides Event and Condition Registers for TEC and LASER
controller operations. The Event Registers are used to report events which occur
during the operation of the LDC-3700C Series Laser Diode Controller. Events
differ from conditions in that events signal an occurrence once, and are not reset
until the Event Register is queried or the LDC-3700C Series Laser Diode
Controller is powered off. Conditions reflect the current state of the device, and
therefore may change many times during operation. Querying a Condition
Register does not change its contents.
Figure 3.5 on page 57 shows the status reporting scheme of the LDC-3700C
Series Controller. Each of the registers which may be accessed by a command or
query has the appropriate command or query written above or below the register
representation. For example, the LASER Condition Register may be queried via
the "
LASer:COND?
" query.
The condition or event registers are logically ANDed with their respective enable
registers. These bits are then logically ORed to form a summary message in the
status byte for that particular register.
TEC:LIM:THI
1 Used to set the TEC upper temperature limit value.
TEC:MODE:T
NONE Sets the instrument to constant temperature mode.
TEC:OUT
1 Used to enable/disable the TEC output.
TEC:OUT?
NONE Returns the TEC output status.
TEC:T
1 Used to set the TEC (temperature) set point.
TEC:T?
NONE Returns the TEC measured temperature value.
TEC:V?
NONE Returns the TEC voltage measurement value.
Table 3.3 LDC-3700C Commonly Used Commands