21. It is difficult to keep stray radiation from the local oscillator below the level that a nearby receiver can detect. 22. In a 1905 patent, Fessenden stated that the frequency stability of his local oscillator was one part per thousand. 23. The signals are mixed with a local oscillator to reduce their frequency, prior to correlation with an analog correlator. 24. The hexode contains two such grids, one for a received signal and one for the signal from a local oscillator . 25. An example is Yaesu's FRG-7 communications receiver, which uses the system to remove local oscillator drift. 26. First, Heterodyned signals are beat frequencies between the signal source and a reference source ( dubbed local oscillator LO ). 27. The local oscillator frequency is switched in response to a 22 kHz signal superimposed on the supply voltage from the connected receiver. 28. The returned laser energy must be mixed with a local oscillator in a heterodyne system to allow extraction of the Doppler shift. 29. He concluded that an oscillator, which became the first local oscillator ( LO ), was ordered for the frequency of. 30. Most receivers are actually superheterodyne receivers and they leak a little of their local oscillator frequency; this can be easily detected.
