Calculated Frequency Data From Spectrumlab, For Wwv-10, 21 Aug 2017

NAME : Martin Potter, VE3OAT GEOPOSIT : 45 15' 9.023" N 75 35' 27.60" W (Maidenhead FN25eg) START TIME : 1400 UT STATION CONFIG : Multi-band vertical antenna with 18 radials. Receiver Yaesu FTdx1200 in AM mode with audio bands limited to 800-1200 Hz (18 dB/octave roll-off). Trimble Thunderbolt 10 MHz output to HP 3325B sig generator set to 9999 kHz and injected to station antenna. Measured nominal 1 kHz beat note between WWV-10 and sig generator using SpectrumLab software. Note : On 20 Aug, receiver AGC was ON. On 21 Aug, receiver AGC was OFF and audio output level was set using RF Gain control.

It was thought advisable to limit the audio bandwidth to 800-1200 Hz because of the broad-band noise interference from an unsuppressed solar panel installation about 600 metres from my location. This noise interference completely covers WWV at 5 MHz during the daytime and makes reception at 10 MHz difficult. Hence, the filtering.

Keywords

WWV-10, solar eclipse

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