4.7 LDC340 specific commands
LDC340 / Page 50
4.7.12 Reading the optical power from the display (POPTP)
Syntax:
"
:POPTP:ACT?
"
Response:
[:POPTP:ACT <NR3>]
Description: Queries the actual optical power, that is calculated from the position of
the potentiometer marked ADJ next to the LED P
LD
. This is the optical
power shown on the display. Unit: [W]
NOTE
This queries the optical power measured by the internal monitor diode that
is displayed on the 4 ½ digit display.
4.7.13 Reading the laser diode voltage (VLD)
Syntax:
"
:VLD:ACT?
"
Response:
[:VLD:ACT <NR3>]
Description:
Queries the actual laser diode voltage. Unit: [V]
4.7.14 Reading the bias voltage (VBIAS)
Syntax:
"
:VBIAS:ACT?
"
Response:
[:VBIAS:ACT <NR3>]
Description:
Queries the actual photo diode bias voltage. Unit: [V]
NOTE
This query always tells the bias voltage set with the potentiometer ADJ
next to the LED PD BIAS even with the bias voltage switched off.
