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USE 0F WWVWWVH BR0ADCASTS F0R FREQUENCY CALIBRATI0NS
RESULTS 0F TIME C0MPARIS0NS
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0scilloscope display showing adjusted angle of radiation beat frequency beat note Bureau of Standards cesium standards circle distance clock comparison Controlled delay counter crystal oscil cycle correction delay TD delayed trigger method dipole direct trigger method display of WWV display showing second Equipment setup error Frequency Calibrations frequency standard half-wavelength harmonic IC9C ICl0B ICllA input frequency intermediate frequency ionosphere l00 kHz signal l00 microseconds layer height Lissajous figure Lissajous pattern logic maximum sunspot cycle milliseconds mixer stage moving average ms/division N0R gate National Bureau number of hops oscillator frequency path propagation delay propagation time delay radio waves receiver delay receiver time delay reception reset second zero crossover selected showing second zero shown in figure sine wave Single-hop sky wave SQUARE WAVE station Technical technique Total time delay transmitter tuned vertical antenna vertical input virtual height WWV and WWVH WWV tick WWV/WWVH tick Yagi antenna