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This section contains scenarios and debug hints. If you are facing the same problem, try the solutions here first. |
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Solution: Check the PSR count when clean signal is being transmitted. If it is relatively low (i.e., ~0.3 or lower), adjust your antenna length, position or consider give the receiver side a boost. To do so, go to the RTL-SDR Source block, change the Gain method to "Manual", RF gain to 20dB. Run the transmission again, it should boost up to a relatively high PSR (~0.9) with clean signal. You are suggested to record signals at a private place rather than in the lab, so that other teams who are transmitting at the same time will not affect your recording. |
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Possible cause 3: Cut-off too early |
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Possible cause 4: Cut-off too late |
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Possible cause 5: Suppression not enough |
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Possible cause 6: Passband signal distorted. |
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Possible cause 7: Unstable DC signal overriding |
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High pass filter |
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Scenario 1: When Bode Plot cutoff at designed frequency but no message can be demodulated.
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