31-01-2018, 07:47 PM
Remember that almost all LIPDs at 434 MHz are a digital FSK or spread spectrum and either will occupy a significant band of frequencies across the 430-440MHz segment of the amateur band, the closer you are physically then the worse the QRM becomes. I suspect the SAW oscillator devices aren't necessarily right on frequency either, the cheaper they are then the poorer the tolerances.
I have also run across car entry keyfobs/systems on 434 as well as the wireless weather, wireless doorbells, etc - the list is long.
LIPD : Low Interference Potential Devices
https://www.acma.gov.au/Industry/Spectru...ctrum-acma
I have also run across car entry keyfobs/systems on 434 as well as the wireless weather, wireless doorbells, etc - the list is long.
LIPD : Low Interference Potential Devices
https://www.acma.gov.au/Industry/Spectru...ctrum-acma
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.