A new concept in the reliability evaluation of vehicular radio

This paper describes automatic equipment developed to conduct temperature tests of two-way vehicular radio. The automatic test unit reported below controls the temperature chamber, maintains input voltages at proper EIA specified levels, turns test specimens on and off, measures the operational performance parameters of transmitters and receivers at each of the selected temperature conditions and prints the data. Four units can be tested at a time and these may be any combination of standard frequency bands, carrier or continuous tone coded squelch, and wide band or split channel.