Special Features:

Shall not exceed 75 lbs; power consumption shall be less than 300 watts; shall be furnished with accessories necessary for mounting in a standard 19 inch eia rack; the unit shall meet all the accuracy requirements specified when the operating temperature is maintained to within 0 degrees to 50 degrees celsius; meter display shall be visible in low light conditions

Properties:

An item which generates a highly accurate signal of one or more fixed frequencies for calibration of frequencies from other sources. Does not include oscillator (as modified). For devices which are designed as voltage sources, see generator, signal. See also frequency meter.