EVERLIGHT ELECTRONICS CO.,LTD.

Everlight Electronics Co., Ltd.

http:\\www.everlight.com

Rev 1.1

Page: 4 of 9

Device No：DMO-026-311

Prepared date：07-13-2004

Prepared by：Carryll Hsu

Carrier frequency is adjusted to

center frequency of each product.

IR TANSMITTER

OUTPUT WAVE FORM

OUTPUT PULSE

OF DEVICE

IRM-2638V

Test Method：

The specified electro-optical characteristics is satisfied under the following

Conditions at the controllable distance.

Measurement place

A place that is nothing of extreme light reflected in the room.

External light

Project the light of ordinary white fluorescent lamps which are not high

Frequency lamps and must be less then 10 Lux at the module surface.

(Ee≦10Lux)

Standard transmitter

A transmitter whose output is so adjusted as to Vo=400mVp-p and the output

Wave form shown in Fig.-1.According to the measurement method shown in

Fig.-2 the standard transmitter is specified.

However , the infrared photodiode to be used for the transmitter should be

λp=940nm,∆λ=50nm. Also, photodiode is used of PD438B(Vr=5V).

Measuring system

According to the measuring system shown in Fig.-3

Fig.-1

Transmitter Wave Form

D.U.T output Pulse

Duty=0.5