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If bit 1 of the condition register is set, the laser's forward voltage is near the user's
Voltage Limit (VLim) setpoint. The Laser Voltage Limit condition occurs when the
voltage is about 0.25 volts less than the VLim setting. When the VLim set voltage
is reached, the hardware is triggered to shut the Laser output off and bit 7, Open
Circuit, is set.
Output Off Registers
The Output Off Enable Registers allow you to determine which conditions and
events in the current sources can cause their outputs to be turned off. These
registers are configured in a manner which is similar to the status reporting
registers. However, their outputs are not reported in the Status Byte Register.
Rather, they go to the hardware which controls the output switching for that
current source. The events and conditions which may be set to cause the outputs
to be turned off are shown in Figure 3.4.
The default settings for the Output Off registers are shown in Table 3.3. These
settings are not affected by the *PSC (Power-On Status Clear) command.
02_03
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Turn
LOGICAL OR
Output
Off
LASER Output Off Bit Reference
0 - Current Limit
8 - n/a
1 - Voltage Limit
9 - Out of Tolerance
2 - n/a
10 - n/a
3 - Power Limit
11 - n/a
4 - n/a
12 - n/a
5 - n/a
13 - n/a
6 - n/a
14 - n/a
7 - n/a
15 - n/a
Figure 3.4 LDC-3926339 Output Off Register
R E M O T E O P E R A T I O N S
Status Reporting
LASER Output Off Register
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
LASER Output Off Enable Register
LASER:ENABle:OUTOFF <nrf>
LASER:ENABle:OUTOFF?
3
C H A P T E R
bit-wise
LOGICAL AND
33
LDC-3926339
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