BS 7693:1993
Current
The latest, up-to-date edition.
Guide to uses of infra-red transmission and the prevention or control of interference between systems
Hardcopy , PDF
English
15-11-1993
Committees responsible
National foreword
Guide
1. Scope
2. Infra-red transmission
2.1 The use of infra-red radiation as a transmission
medium
2.2 Advantage of IR transmission
2.3 Limitations of IR transmission
3. Transmission systems and disturbing sources
3.1 Transmission systems
4. Applications
4.1 Remote control
4.1.1 Applications
4.1.2 Systems and characteristics
4.1.3 Performance
4.2 Audio transmission
4.2.1 Applications
4.2.2 Broadband systems (BBS)
4.2.3 Multi-channel narrowband systems
4.2.4 Technical data (typical values)
4.3 Data transmission
4.3.1 Application
4.3.2 Existing or experimental systems
4.3.3 Performance
5. Disturbances
5.1 Causes by daylight (sunlight)
5.2 Caused by radiation from artificial light sources
5.2.1 General
5.2.2 Incandescent lamps
5.2.3 Tubular fluorescent lamps
5.2.4 High pressure gas-discharge lamps
5.3 IR-disturbances caused by the simultaneous use
of more than one infra-red application (including
interference table)
6. Prevention and reduction of interference
6.1 General
6.2 Light sources
6.3 Transmission systems
6.3.1 Remote control
6.3.2 Audio transmission (frequency multiplex/time
multiplex)
6.3.3 Data transmission
6.4 Optical filtering
7. Conclusion
Figures
1. Frequency spectrum of a biphase modulation system
2. Frequency spectrum of a pulse distance modulated
system
3. Spectral responses of three types of IR diode
4. Response characteristics of typical IR remote
control receivers
5. Maximum permitted disturbing irradiance against
wavelength
6. Measurement circuit
7. Emission spectrum S(lambda) of an IR emitter,
transmission spectra (Tn(lambda)) of two different
dyes and spectral response D(lambda) of the
different signal of two counteracting diodes
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.