Frequency measuring device for telecommunication s

专利名称：Frequency measuring device for

telecommunication systems

发明人：Jacques M. Jules申请号：US05/755945申请日：19761230公开号：US04074191A公开日：19780214

摘要：A device capable of being operated under the control of a programmer forrapidly measuring the differences between the actual values of a plurality of transmittedsignal frequencies and their assigned values. It comprises a constant frequency localoscillator, a modulator fed from said oscillator and from a signal the actual frequency ofwhich is to be determined, a bandpass filter fed from the output of said modulator,another local oscillator producing a constant frequency, and means for measuring thefrequency difference between said other oscillator and the output frequency of the filter.Arrangements are provided for displaying the measured frequency difference values indigital form.

申请人：JULES; JACQUES M.

更多信息请下载全文后查看