Analog Output Parameter Input; Selecting Analog Outputs (If Option Present) - Newport LDS1000 User Manual

LDS1000 Controller for Laser Diode Sensors
8.0

Analog Output Parameter Input

8.1

Selecting Analog Outputs (if option present)

=> (F4) => (F4)
The analog outputs are a material option that must be specified at the time
of ordering. They can be installed later on, but you will need to contact our
after-sales service.
When the analog outputs are activated, the OUTY and OUTZ connectors
located on the rear panel of the controller give two voltages that are pro-
portional to the digital values calculated by the controller. The analog out-
puts take into account the real calibration performed on the current sensor
and provide the reliable values that can be used directly. The refresh fre-
quency of the analog outputs has been set at 2 kHz which enables events to
be seized rapidly. Thus, when the analog outputs are active, the controller
no longer manages the display, or the communication with the computer.
When the analog outputs have been chosen and the controller is switched
off, the controller memorizes this status. When the controller is switched
on, the analog mode is reactivated. The LDS1000 Controller operates like a
standard analog instrument and can be perfectly integrated into classical
acquisition chains.
The configuration parameters of the analog outputs are the following:
INTG: Integration constant (in msec).
Like the digital version, the value available at the output is obtained by a
sliding average of a given number of values measured at maximum frequen-
cy. With this parameter a frequency filter adapted to the signals that you
wish to obtain can be selected.
GAIN: Choice of output gain.
The output voltage is between -10 volts and +10 volts. When the gain is 1,
the voltage of +10 V matches the highest limit of the measurement range.
When the gain is 10, the same voltage only corresponds to a tenth of the
highest limit of the measurement range.
With a gain of 1, the resolution of 1 increment supplies a voltage of 5 mV. It
increases to 50 mV for a gain of 10.
The (F4) menu provides access to the analog outputs that are
immediately available on the rear panel. In addition, it displays the current
parameters:
The first value is the value of the integration constant used, the second
value is the value of the gain.
27
EDH0170FE1010 – 09/98