Renseignements généraux

Nº de série

S/O

Nº de partie

1

Nombre total de parties

12

Ou

S/O

Brevets

S/O

Description générale

METAL/ SYNTHETIC/ CERAMIC/ GLASS

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

48,0 cm

Largeur

31,5 cm

Hauteur

9,5 cm

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Technologie informatique

Catégorie

Dispositifs numériques

Sous-catégorie

S/O

Fabricant

Ou

Norpak

Pays

Canada

État/province

Ontario

Ville

Kanata

Contexte

Pays

Canada

État/province

Ontario

Période

1980'S

Canada

This decoder was designed, developed and built in Canada. It is Telidon videotex technology created by the Communications Research Centre. The Telidon program began on August 15, 1978 and ended on March 31, 1985.

Fonction

This is a fourth-generation videotext decoder. The purpose of a decoder is to receive the communications data that's transmitted over narrow bandwidth line, which would be the telephone line in this case, and decode and convert it to something that can be put on to a display screen.

Technique

This decoder used a microprocessor and a 1200 baud modem to decode and convert communications data code to something that was displayable on a television display screen. This decoder used a bit plane that is a dot by dot image structure. While the graphic was not high quality, it was quite reasonable and the code was designed to be capable of expanding to handle higher resolutions. The system was designed to be forward and backward compatible, meaning it had the capability of displaying existing and future images, taking advantage of lowering memory costs to improve Telidon technology over time. In 1983, the North American Presentation Level Protocol Syntax (NAPLPS) graphics language develop from the Canadian Telidon system was formalized, ratified and adopted as a world standard for graphics transmission by computer. The mark 4 decoder was a great upgrade because it was developed after the adoption of the NAPLPS standard. It had a significant amount more functionality, including dynamic color maps. It also had the capability of supporting some of the codes that came from the European videotex systema because the Communications Research Centre research team wanted to increase the information economy.

Notes sur la région

Inconnu

Détails

Marques

.1 ON FRONT: 'norpak/ Mark IV Telidon Videotex Decoder/ Power CarrierSend Receive Dial'/ ON BACK: 'norpak ltd./ KANATA, ONTARIO/ MADE IN CANADA/ [PORTLABELS:] KEYBOARD/ DATA PORT/ TELEPHONE/ RED GREEN/ BLUE SYNC/ RF IN RF OUT/ [BAUD RATES LISTED]/ [ECHO & DATA CHOICES LISTED]/ [ABOVE PLUG:] 120 VAC/ UNSWITCHED/ 250 W MAX. LOAD/ [ABOVE FUSE:] 120 VAC/ 3 AMP/ SLOWBLOW/ [ABOVE CORD OUTLET:] 120 VAC/ 60 HZ/ 1 AMP'/ STICKER READS: 'ontario hydro/ electrical/ approval/ by special inspection-series 10'/ STICKER ON TOP: 'N.M.C./ M.N.C./ 32145'.

Manque

S/O

Fini

VARIOUS SHADES OF GREY PLUS BLACK WITH BLACK & WHITE PRINTING & TRIM.

Décoration

S/O