Line-of-Sight Data Link Test Set
Final technical rept. Jul 1975-Jan 1976
SIGNATRON INC LEXINGTON MA
Pagination or Media Count:
A versatile laboratory instrument which provides accurate and repeatable simulation of multipath and Doppler propagation effects has been built. Microwave line-of-sight airborne radio links typical of remotely piloted vehicle RPV wideband data links can be simulated. The simulator designated Model S-187 is a test set designed to be used in the development and evaluation of modem equipments operating at intermediate frequencies of 70, 100 and 300 MHz with signal bandwidths up to 100 MHz. The basic channel model consists of an undelayed path having both a constant and a fading component and two delayed paths which may be either constant or fading. The delay spacing of the path is 6.6, 16.6, or 50 nanoseconds. The strength of each component may be adjusted over a 60 dB range. The rms bandwidths of the fading components are independently selectable from 1 Hz up to 1,000 Hz. By selection of constant and fading combinations of the undelayed and delayed paths various frequency responses and fading distributions can be simulated.
- Radio Communications