EDH0170FE1010 – 09/98 28
LDS1000 Controller for Laser Diode Sensors
Electric Characteristics of the Analog Outputs:
•Outputs on rear panel of controller2 connectors BNC OUTY and OUTZ
•Refresh frequency 2000 Hz
•Low pass digital filter 1 to 2000 Hz (depending on INTG)
•Output range ±10 V
•Scale factor 5 mV/incr (for Gx1) to
1000 mV/incr (for Gx200)
•Resolution 0.5 increment
•Electronic noise 1 mV rms
•Distortion 0.5% (electronic)
•Maximum offset 50 mV typical
•Discrepancy Pure delay of 1.1 msec
(outside integration)
•Output impedance 10 Ω
WARNING: SPECTRAL WITHDRAWAL
The analog outputs use an intermediary calculation stage that is based
on a sample at 2000 Hz. This will limit the use of the LDS sensor for stu-
dying signals that do not have a significant spectral component over
1000 Hz (this sort of component would find themselves “withdrawn” and
would appear for lower frequencies).
The functions accessible by the Menu are the following:
(F4)Modification of analog output parameters.
(F5)Return to main menu.
Return to main menu disables the analog outputs.
8.2 Modification of Analog Output Parameters
=> (F4) => (F4) => (F4)
The integration constant INTG and the gain GAIN can be modified in this
menu.
They will be chosen in relation to the type of measurements to be carried out:
•Rapid measurements: Low integration value.
•Accurate measurements: Long integration value.
•Wide range: Low gain value.
•Reduced range: High gain value (Zoom).
From this menu the active keys are the following:
(F1)Modification of the integration constant.
(F2)Modification of the gain.
(F5)Return to analog output mode.
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