General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

Sweep Unit

Patents

N/A

General Description

Metal casing and connector pieces with a hard synthetic switch

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

21.3 cm

Width

7.0 cm

Height

14.2 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Communications

Category

Radio

Sub-Category

N/A

Manufacturer

AKA

Bruel Kjaer

Country

Denmark

State/Province

Unknown

City

Unknown

Context

Country

Canada

State/Province

Ontario

Period

1976-1998

Canada

Bell Northern Research, was the research and development subsidiary of Northern Telecom (later Nortel Networks) and Bell Canada. It was built by Northern Telecom at its Trans-Canada plant in Montreal. Northern Telecom and its predecessor, Northern Electric, was for decades Canada’s largest manufacturer of telecommunications equipment. Originally a subsidiary of the AT&T-owned Western Electric, for which it manufactured American-designed products for the Canadian market, Northern Electric became Canadian-owned in the 1950s and in the 1960s began to design and produce equipment to meet the distinctive needs of Canadian telecommunication companies. In the 1970s, through its new research subsidiary, Bell Northern Research, the company made a concerted shift from conventional analogue equipment into the emerging field of digital communications, becoming in the 1980s the first equipment supplier to provide a complete line of fully digital switching and transmission gear. During this decade the company moved aggressively into export markets, and opened manufacturing and R&D operations in several countries. The company’s sales soared during the internet boom of the 1990s, but a combination of poor financial decisions and a failure to maintain its technological edge led eventually to its bankruptcy in 2009. The original Bell Northern facilities were designed with cutting edge telecommunications research and development in mind with the first three buildings on the campus featuring laboratories, an extensive research library, and an anechoic chamber. The anechoic chamber was the focal point of the Bell Northern Research acoustics research examining both the technology and placement of speakers and microphones in telecommunication devices. The anechoic chamber group was organized under the Industrial Design and working together with design were responsible for the development of the acoustic properties of most products. (From the Acquisition Proposal, see Ref. 1)

Function

Used to monitor the radio spectrum to identify sources of radio interference. (From the Acquisition Proposal, see Ref. 1)

Technical

Used in conjunction with other Bruel & Kjaer equipment to build an experimental acoustic apparatus. (From the Acquisition Proposal, see Ref. 1)

Area Notes

Unknown

Details

Markings

On the proper front: "Sweep Unit ZM 0047/ Normal/ Rec. Paper/ 100 Hz/ 10 kHz/ 4904/ Range/ Time/ Sweep/ Generator/ Freq. Contr. Volt. In/ Level Recorder/ X-Input/ Spectrometer/ Remote Control/ Level Recorder/ Remote Control/ Brüel & Kjaer/ [logo]"/ On the stickers on the proper top: "nt/ FOR/ INDICATION/ ONLY"/ "BNR [logo]/ ACOUSTIC DESIGN"/ On the purple sticker on the proper back: "property of/ Bell-Northern research/ L-0015401/ Ottawa - Canada/ [logo]"/ Printed on the proper back casing: "Made in Denmark"

Missing

Appears complete

Finish

Predominantly black casing with a light green panels on the proper front and back. On the proper front are black markings and a switch and a silver coloured metal fastener and connectors. On the top there is a grey sticker with black markings and a pink sticker with black markings. On the proper back there are black markings, a white and purple sticker and a black and silver coloured metal screws.

Decoration

N/A