The WWV Detector provides a simple method to measure the frequency offset of your HF Radio. This is useful to check if your radio is still within specifications or has drifted in frequency.
This detector uses a WWV station as a reference signal and then measures the offset in the IF frequency. As an example, the HF Radio for this display was tuned to 1500 Hz less than 10 MHz in USB mode. This sets the IF frequency of the WWV 10 MHz signal at 1500 Hz for an Icom 710 Marine Transceiver. The WWV detector located the carrier frequency at 1510.4, as indicated by the red line. This indicates the radio's frequency offset is 10.4 Hz at 10 MHz.
This HF Radio is very close to being out of specification, as the frequency offset should be less than 10 Hz at 10 MHz. If the frequency offset was much larger it would be time to have the unit recalibrated.
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