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Updated Usage cautions (markdown)

sommermorgentraum 2024-04-28 16:09:35 +08:00
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Usage-cautions.md

@ -7,3 +7,7 @@ The LNA of HackRF is extremely sensitive, thus you need to notice the following
- The LNA of hackrf is physically between SMA port and radio front end - The LNA of hackrf is physically between SMA port and radio front end
- Thus, you shouldn't receive near high power transmitters, even if it's not in the range that you are monitoring. - Thus, you shouldn't receive near high power transmitters, even if it's not in the range that you are monitoring.
- For example: You are receiving FM radio at 100.00MHz, and there's a high power transmitter at 2.5GHz around you, the transmitter will still blow your LNA, if you set LNA/AMP too high and/or too near the transmitters, even if 2.5GHz is not in the freq range that you are monitoring. - For example: You are receiving FM radio at 100.00MHz, and there's a high power transmitter at 2.5GHz around you, the transmitter will still blow your LNA, if you set LNA/AMP too high and/or too near the transmitters, even if 2.5GHz is not in the freq range that you are monitoring.
# I suspect I damaged the LNA, how do i check?
- Try listen local radio. Try with AMP on and off both.
- Try replay a **non**-rolling code <sub>(to prevent break the rolling sync)</sub> fob. Try with AMP on and off both.