26-01-2017, 08:45 AM
I tried SDsharp as the spec analyser today after noting paging tones come over the top (partial FM capture) of some users on VK4RAX (Rx 147.675), still with the attenuator in-line and adjusted to prevent overload. Vertical graticule is 5dB steps (approx).
This latter image shows some transmitted intermod as the extra spurs are still there with more attenuation in line to the SDR.
The 148.5625 frequency up alone does not show spurs..
This latter image shows some transmitted intermod as the extra spurs are still there with more attenuation in line to the SDR.
The 148.5625 frequency up alone does not show spurs..
Doug VK4ADC @ QG62LG51
http://www.vk4adc.com
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http://www.vk4adc.com
This Forum is only going to be as interesting as the posts it contains.
If you have a comment or question, post it as it may trigger or answer the query in someone else's mind.