EDH0170FE1010 – 09/98
28
LDS1000 Controller for Laser Diode Sensors
Electric Characteristics of the Analog Outputs:
• Outputs on rear panel of controller 2 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1000 Hz (this sort of component would find themselves “withdrawn” and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.
