Test Methods

Background Light and

Electromagnetic Field

There are four ambient

interference conditions in which

the receiver is to operate

correctly. The conditions are to be

applied separately:

1. Electromagnetic field:

3 V/m maximum (please refer

to IEC 801-3, severity level 3

for details).

2. Sunlight:

10 kilolux maximum at the

optical port. This is simulated

with an IR source having a

peak wavelength within the

range of 850 nm to 900 nm and

a spectral width of less than

50 nm biased to provide 490

at the optical port. The light

source faces the optical port.

This simulates sunlight within

the IrDA spectral range. The

effect of longer wavelength

radiation is covered by the

incandescent condition.

3. Incandescent Lighting:

1000 lux maximum. This is

produced with general service,

tungsten-filament, gas-filled,

inside frosted lamps in the 60

Watt to 100 Watt range to

generate 1000 lux over the

horizontal surface on which the

equipment under test rests.

The light sources are above the

test area. The source is

expected to have a filament

temperature in the 2700 to

3050 Kelvin range and a

spectral peak in the 850 to

1050 nm range.

4. Fluorescent Lighting:

1000 lux maximum. This is

simulated with an IR source

having a peak wavelength

within the range of 850 nm to

900 nm and a spectral width of

less than 50 nm biased and

modulated to provide an

optical square wave signal

(0

0.3

with 10% to 90% rise and fall

times less than or equal to

100 ns) over the horizontal

surface on which the

equipment under test rests.

The light sources are above the

test area. The frequency of the

optical signal is swept over the

frequency range from 20 kHz to

200 kHz.

Due to the variety of

fluorescent lamps and the

range of IR emissions, this

condition is not expected to

cover all circumstances. It will

provide a common floor for

IrDA operation.

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Data subject to change. Copyright © 2007 Lite-On Technology Corporation. All rights reserved.