Modification Of Analog Output Parameters - Newport LDS1000 User Manual

LDS1000
EDH0170FE1010 – 09/98
Electric Characteristics of the Analog Outputs:
• Outputs on rear panel of controller 2 connectors BNC OUTY and OUTZ
• Refresh frequency
• Low pass digital filter
• Output range
• Scale factor
• Resolution
• Electronic noise
• Distortion
• Maximum offset
• Discrepancy
• Output impedance
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1000 Hz (this sort of component would find themselves "withdrawn" and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
(F4) Modification of analog output parameters.
(F5) Return to main menu.
8.2

Modification of Analog Output Parameters

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:
• Accurate measurements:
• Wide range:
• Reduced range:
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.
Controller for Laser Diode Sensors
2000 Hz
1 to 2000 Hz (depending on INTG)
±10 V
5 mV/incr (for Gx1) to
1000 mV/incr (for Gx200)
0.5 increment
1 mV rms
0.5% (electronic)
50 mV typical
Pure delay of 1.1 msec
(outside integration)
10 Ω
WARNING: SPECTRAL WITHDRAWAL
Menu are the following:
Return to main menu disables the analog outputs.
=> (F4) =>
Low integration value.
Long integration value.
Low gain value.
High gain value (Zoom).
28
(F4) => (F4)