Feasa 20-F, User Manual

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FEASA LED ANALYSER
FUNCTIONAL VERSION
Capture Mode
MANUAL CAPTUREPWM - Store PWM LED Data for a specific Range
Transmit Receive
capture#pwm@@
capture#pwm
OK
OK
Where:
# represents the exposure Range 1 – 5.
@@ represents an averaging factor in the range 1 - 15.
@@ If the @@ digits are omitted then a default setting of 07 is used.
Description
This command allows the User to specify the exposure range # and an averaging factor @@
when testing PWM LED's. Select the exposure range # (1-5) to match the Intensity of the
LED's. The Analyser tests these LED's by taking a number of readings and averaging the
results. A larger Averaging factor will lead to more stable results but increased Test Times.
The
averaging factor @@ is a number in the range 1-15. If this number is omitted from the
command the default value is 07.
This command instructs the LED Analyser to read and store the Colour and Intensity of all the
LED's positioned under the fibers. The data is stored until the power is removed or another
capture command is issued. When completed the Analyser will transmit the character OK on
the receive line to the transmitting device (i.e. the PC).
capture1pwm10
OK
or
c1pwm10
OK
There are 5 manual capture ranges each with an intensity output range of 0 to
99,999. Feasa recommends that the UUT readings should be in the 55K to 85K range
for the best stability.
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