Gretacoder 101

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Scrambler

Gretag

GC-101 →


SC-101

Voice scrambler - this page is a stub

Gretag SC-101 was a frequency and time domain voice scrambler for telephone and short-wave radio links, developed around 1973 by Gretag AG in Regensdorf (Switzerland). In was intended for civil as well as military use, and was succeeded in 1975 by the — also two-dimensional — voice scrambler GC-101 and GC-102. At present no further information is available.

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Specifications

Device
Voice scrambler
Purpose
Secure narrowband voice transmission over telephone and radio circuits
Model
SC-101
Year
1973
Manufacturer
Gretag
Successor
GC-101
Principle
F/T scrambling
Mode
Half-duplex
Bandwidth
300-2800 Hz
Distortion
≤ 8%
Suppression
≥ 55dB
Interval
100 ms
Resync
70 sec
Key space
8⁸ = 16,777,216
Period
10¹⁰
Power
12 to 16V DC
Consumption
3.5W (standby), 10W (receiver or transmit)
Temperature
-10°C to +50°C
Storage
-40°C to +75°C
Dimensions
285 × 200 × 70 mm
Weight
3 kg


Documentation

SC-101 Speech Scrambler
Product Datasheet (English). 2 pages
Gretag AG, April 1973..


Further information

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