Stanford Research Systems LDC500, Руководство по эксплуатации и обслуживанию

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4 – 24 Remote Operation
Interlock ILOC?
Query the state of the external laser interlock.
ILOC?
returns the token value CLOSED 0 or OPEN 1 . The laser diode
cannot be turned on if
ILOC?
is OPEN , and will trip o
ff
unconditionally
should the interlock open at any time.
Front panel:
LD :
(1#
.
ILOC?
Example:
CLOSED
4.5.7 Laser configuration commands
Laser Diode Current Range
RNGE(?)
{ z }
Set (query) the laser diode current source range
{
to
z =
( LOW 0 ,
HIGH
1
)
}
.
The controller has two operating ranges for the laser diode cur-
rent source. Setting
RNGE
LOW sets the maximum output current
to 250 mA (LDC501) or 50 mA (LDC500), while RNGE
HIGH
sets it to
500 mA (LDC501) or 100 mA (LDC500). The
RNGE
command cannot
be executed while the laser is on.
Front panel:
LD :
(3 46)*
.
RNGE HIGH Example:
Modulate Enable MODU(?)
{ z }
Set (query) the laser diode analog modulation input
{
to
z =
(
OFF 0
,
ON
1
)
}
.
The LDC500 has an input relay to disconnect the modulate input
BNC connector from the LD driver circuitry. Setting
MODU
OFF
opens this relay, disconnecting the connector (and any user cable)
from the driver. When using modulation, the user must send the
MODU
ON
command.
For an important discussion of grounding issues when using analog
modulation, see section 1.2.2.1
Front panel:
LD :%
7 48
.
LDC500 Series Laser Diode Controllers