SDR: Fix rtl_power: symbol lookup error: rtl_power: undefined symbol: rtlsdr_set_bias_tee für Raspberry Pi – Wenzlaff.de

Das Rtl_power ist ein unix-hacker’s Tool für die Annäherung an den Wasserfall mit folgenden Features, ldt. Kyle Keen:

Unlimited frequency range. You can do the whole 1.7GHz of a dongle
Unlimited time. At least until you run out of disk for logging
Unlimited FFT bins.
Quantitative rendering. Exact power levels are logged.
Runs on anything. A slower computer will use less samples to keep up.

Wer folgenden Abbruch

rtl_power: symbol lookup error: rtl_power: undefined symbol: rtlsdr_set_bias_tee

auf dem Raspberry Pi bei rtl-power bekommt, der kann die librtlsdr0 entfernen mit

sudo apt-get remove librtlsdr0

1	sudo apt-get remove librtlsdr0

dann läufts.

Hier die Online Hilfe für rtl_power -h

rtl_power -h
rtl_power, a simple FFT logger for RTL2832 based DVB-T receivers

Use:    rtl_power -f freq_range [-options] [filename]
        -f lower:upper:bin_size [Hz]
         (bin size is a maximum, smaller more convenient bins
          will be used.  valid range 1Hz - 2.8MHz)
        [-i integration_interval (default: 10 seconds)]
         (buggy if a full sweep takes longer than the interval)
        [-1 enables single-shot mode (default: off)]
        [-e exit_timer (default: off/0)]
        [-d device_index (default: 0)]
        [-g tuner_gain (default: automatic)]
        [-p ppm_error (default: 0)]
        [-T enable bias-T on GPIO PIN 0 (works for rtl-sdr.com v3 dongles)]
        filename (a '-' dumps samples to stdout)
         (omitting the filename also uses stdout)

Experimental options:
        [-w window (default: rectangle)]
         (hamming, blackman, blackman-harris, hann-poisson, bartlett, youssef)
        [-c crop_percent (default: 0%, recommended: 20%-50%)]
         (discards data at the edges, 100% discards everything)
         (has no effect for bins larger than 1MHz)
        [-F fir_size (default: disabled)]
         (enables low-leakage downsample filter,
          fir_size can be 0 or 9.  0 has bad roll off,
          try with '-c 50%')
        [-P enables peak hold (default: off)]
        [-D enable direct sampling (default: off)]
        [-O enable offset tuning (default: off)]

CSV FFT output columns:
        date, time, Hz low, Hz high, Hz step, samples, dbm, dbm, ...

Examples:
        rtl_power -f 88M:108M:125k fm_stations.csv
         (creates 160 bins across the FM band,
          individual stations should be visible)
        rtl_power -f 100M:1G:1M -i 5m -1 survey.csv
         (a five minute low res scan of nearly everything)
        rtl_power -f ... -i 15m -1 log.csv
         (integrate for 15 minutes and exit afterwards)
        rtl_power -f ... -e 1h | gzip > log.csv.gz
         (collect data for one hour and compress it on the fly)

Convert CSV to a waterfall graphic with:
         http://kmkeen.com/tmp/heatmap.py.txt

rtl_power -h

rtl_power, a simple FFT logger for RTL2832 based DVB-T receivers

Use: rtl_power -f freq_range [-options] [filename]

-f lower:upper:bin_size [Hz]

(bin size is a maximum, smaller more convenient bins

will be used. valid range 1Hz - 2.8MHz)

[-i integration_interval (default: 10 seconds)]

(buggy if a full sweep takes longer than the interval)

[-1 enables single-shot mode (default: off)]

[-e exit_timer (default: off/0)]

[-d device_index (default: 0)]

[-g tuner_gain (default: automatic)]

[-p ppm_error (default: 0)]

[-T enable bias-T on GPIO PIN 0 (works for rtl-sdr.com v3 dongles)]

filename (a '-' dumps samples to stdout)

(omitting the filename also uses stdout)

Experimental options:

[-w window (default: rectangle)]

(hamming, blackman, blackman-harris, hann-poisson, bartlett, youssef)

[-c crop_percent (default: 0%, recommended: 20%-50%)]

(discards data at the edges, 100% discards everything)

(has no effect for bins larger than 1MHz)

[-F fir_size (default: disabled)]

(enables low-leakage downsample filter,

fir_size can be 0 or 9. 0 has bad roll off,

try with '-c 50%')

[-P enables peak hold (default: off)]

[-D enable direct sampling (default: off)]

[-O enable offset tuning (default: off)]

CSV FFT output columns:

date, time, Hz low, Hz high, Hz step, samples, dbm, dbm, ...

Examples:

rtl_power -f 88M:108M:125k fm_stations.csv

(creates 160 bins across the FM band,

individual stations should be visible)

rtl_power -f 100M:1G:1M -i 5m -1 survey.csv

(a five minute low res scan of nearly everything)

rtl_power -f ... -i 15m -1 log.csv

(integrate for 15 minutes and exit afterwards)

rtl_power -f ... -e 1h | gzip > log.csv.gz

(collect data for one hour and compress it on the fly)

Convert CSV to a waterfall graphic with:

http://kmkeen.com/tmp/heatmap.py.txt

Ein Beispiel lauf:

rtl_power -f 950M:1450M:3.2M -g 30 -i 1 | awk 'BEGIN {t=0} {if (t==0) {t=$2; n=0; s=0}; if (t==$2) {s+=$7; n++} else {print s/n; t=0}}'
Number of frequency hops: 156
Dongle bandwidth: 3200000Hz
Downsampling by: 1x
Cropping by: 0.00%
Total FFT bins: 156
Logged FFT bins: 156
FFT bin size: 1396648.00Hz
Buffer size: 16384 bytes (2.56ms)
Reporting every 1 seconds
Found 1 device(s):
  0:  Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM
Found Rafael Micro R820T tuner
Tuner gain set to 29.70 dB.
[R82XX] PLL not locked!
-29.0534
-29.1021
-29.0906
-29.0941
-29.0894

rtl_power -f 950M:1450M:3.2M -g 30 -i 1 | awk 'BEGIN {t=0} {if (t==0) {t=$2; n=0; s=0}; if (t==$2) {s+=$7; n++} else {print s/n; t=0}}'

Number of frequency hops: 156

Dongle bandwidth: 3200000Hz

Downsampling by: 1x

Cropping by: 0.00%

Total FFT bins: 156

Logged FFT bins: 156

FFT bin size: 1396648.00Hz

Buffer size: 16384 bytes (2.56ms)

Reporting every 1 seconds

Found 1 device(s):

0: Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM

Found Rafael Micro R820T tuner

Tuner gain set to 29.70 dB.

[R82XX] PLL not locked!

-29.0534

-29.1021

-29.0906

-29.0941

-29.0894

Oder in eine data.csv Datei speichern:

sudo rtl_power -f 24M:1700M:1M -i 100 -g 50 -e 24h data.csv
Number of frequency hops: 1676
Dongle bandwidth: 1000000Hz
Downsampling by: 1x
Cropping by: 0.00%
Total FFT bins: 1676
Logged FFT bins: 1676
FFT bin size: 699499.00Hz
Buffer size: 16384 bytes (8.19ms)
Reporting every 100 seconds
Found 1 device(s):
  0:  Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM
Found Rafael Micro R820T tuner
Tuner gain set to 49.60 dB.
Exact sample rate is: 1000000.026491 Hz
[R82XX] PLL not locked!

sudo rtl_power -f 24M:1700M:1M -i 100 -g 50 -e 24h data.csv

Number of frequency hops: 1676

Dongle bandwidth: 1000000Hz

Downsampling by: 1x

Cropping by: 0.00%

Total FFT bins: 1676

Logged FFT bins: 1676

FFT bin size: 699499.00Hz

Buffer size: 16384 bytes (8.19ms)

Reporting every 100 seconds

Found 1 device(s):

0: Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM

Found Rafael Micro R820T tuner

Tuner gain set to 49.60 dB.

Exact sample rate is: 1000000.026491 Hz

[R82XX] PLL not locked!

Und noch in die airband.csv Datei:

rtl_power -f 118M:137M:8k -g 50 -i 10 -e 1h airband.csv
Number of frequency hops: 7
Dongle bandwidth: 2714285Hz
Downsampling by: 1x
Cropping by: 0.00%
Total FFT bins: 3584
Logged FFT bins: 3584
FFT bin size: 5301.34Hz
Buffer size: 16384 bytes (3.02ms)
Reporting every 10 seconds
Found 1 device(s):
  0:  Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM
Found Rafael Micro R820T tuner
Tuner gain set to 49.60 dB.
Exact sample rate is: 2714285.041470 Hz
[R82XX] PLL not locked!