en:users:drivers:ath9k:spectral_scan
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| Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
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en:users:drivers:ath9k:spectral_scan [2016/12/23 10:54] Robert Felten fixed markup / format |
en:users:drivers:ath9k:spectral_scan [2016/12/23 13:37] Robert Felten [ath9k spectral scan] minor format fix |
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| * absolute magnitude (|i|+|q|, abs() for I/Q phase of the wireless signal) for each FFT bin (56 for subcarriers in HT20 mode and 128 in HT40 mode) | * absolute magnitude (|i|+|q|, abs() for I/Q phase of the wireless signal) for each FFT bin (56 for subcarriers in HT20 mode and 128 in HT40 mode) | ||
| * an index indicating the strongest FFT bin | * an index indicating the strongest FFT bin | ||
| - | * the maximum signal magnitude for each sample These information can be used to create an open source spectrum analyzer or interference classifier | + | * the maximum signal magnitude for each sample |
| - | To try it out, you can use the following commands to acquire samples for all channels which can be scanned: | + | These information can be used to create an open source spectrum analyzer or interference classifier. To try it out, you can use the following commands to acquire samples for all channels which can be scanned: |
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| * ''manual'': as many spectral scan samples as configured in spectral_count are returned from the current channel after writing "trigger" into spectral_scan_ctl. | * ''manual'': as many spectral scan samples as configured in spectral_count are returned from the current channel after writing "trigger" into spectral_scan_ctl. | ||
| * ''chanscan'': as many spectral scan samples as configured in spectral_count are returned for each channel when performing a scan. | * ''chanscan'': as many spectral scan samples as configured in spectral_count are returned for each channel when performing a scan. | ||
| - | * **spectral_scan0**: the relayfs file which returns the spectral scan samples. The samples are returned as TLV binary data, see ''drivers/net/wireless/ath/ath9k/spectral.h'' and/or ''drivers/net/wireless/ath/spectral_common.h'' for the format | + | * **spectral_scan0**: the relayfs file which returns the spectral scan samples. The samples are returned as TLV binary data, see ''drivers/net/wireless/ath/ath9k/spectral.h'' and/or ''drivers/net/wireless/ath/spectral_common.h'' for the format |
| ===== Spectral scan parameters ===== | ===== Spectral scan parameters ===== | ||
en/users/drivers/ath9k/spectral_scan.txt ยท Last modified: 2021/11/05 03:39 by Craig Younkins
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