AM images on LF and MF range
AM images on LF and MF range
Hi
I knew about FM images on UHF (380-440)
Today I was playing with SDRPlay and I heard some commercial stations on 18KHZ, 155KHZ, 276KHZ, etc
I knew that these can't be real and found out that these are in fact, images.
Has anyone else noticed this behaviour before? Can it be overcome?
Thanks
I knew about FM images on UHF (380-440)
Today I was playing with SDRPlay and I heard some commercial stations on 18KHZ, 155KHZ, 276KHZ, etc
I knew that these can't be real and found out that these are in fact, images.
Has anyone else noticed this behaviour before? Can it be overcome?
Thanks
Last edited by Sasan on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
Reason: No reason
Reason: No reason
DF2HF, NM9A, EP2C
Re: AM images on LF and MF range
A good quality low pass filter with a suitable cut-off is the only way to get rid of these 'images'. It might comfort you to know that the much more expensive SDRs requires filters to remove break through from strong stations.
Last edited by DaveB on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
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Re: AM images on LF and MF range
I had the same problem with the RSP and a fairly high end receiver that I have. A Google search brought me to this forum topic. I found a very complete discussion (including how to set up the filter) at this: http://www.dxing.com/tnotes/tnote06.pdf
Last edited by jackb on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
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