![]() Historical data indicates accuracy of the WWV received signal on HF is typically within +/- 0.2 Hz of WWV (inaccuracy caused by Doppler shift due to the ever changing Ionosphere), and calibration of instruments within 1 Hz of WWV is very realistic. Next, set your radio to one of the WWV frequencies. At WA2HOM, we use a SignaLink USB to connect the rig’s line output to our desktop computer. At home, I connect the line output of my IC-746PRO to the mic input of my laptop. First, connect the rig audio to the computer. While this concept does not provide as much accuracy as a GPSDO (GPS disciplined oscillator), it's traceable directly back to NIST and requires no calibration, etc. There’s a very simple way to check the calibration of your rig, using WWV and a laptop computer running a digital modes program. I built receivers for both the 5 MHz and 10 MHz WWV frequency, and could not be happier with the results. The calibration function adjusts the time1 values for all clock drivers except. sound from the telephone receiver, then you can check your calibration. These include support for the NIST time/frequency stations WWV and WWVH. ![]() The thread kind of put a damper on the subject, but I would like to say the idea was definitely not a crazy one.Ī year ago I designed and built TRF (Tuned Radio Frequency) receivers for WWV using a crystal filter followed by a MC1350P amplifier with tuned front end and broadband output followed by another crystal filter. will hear the same thing that is broadcast on shortwave radio station WWV. While doing a search I came across a very old Thread in this forum from 2004 called "WWV Receiver" asking about building a WWV receiver to capture the WWV carrier for instrument calibration / frequency standard.
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