RTL-SDR: rtl-fm - Revision history

Onnowpurbo: /* Referensi */

2020-01-04T01:19:36Z

Referensi

← Older revision		Revision as of 01:19, 4 January 2020
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	* http://kmkeen.com/rtl-demod-guide/		* http://kmkeen.com/rtl-demod-guide/


			==Pranala Menarik==

			* [[GNURadio]]

Onnowpurbo: /* AirBand Scanner */

2019-12-30T02:12:55Z

AirBand Scanner

← Older revision		Revision as of 02:12, 30 December 2019
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	rtl_fm -M am -f 118M:137M:25k -s 12k -g 50 -l 280 \| play -r 12k -t raw -e s -b 16 -c 1 -V1 -		rtl_fm -M am -f 118M:137M:25k -s 12k -g 50 -l 280 \| play -r 12k -t raw -e s -b 16 -c 1 -V1 -

			rtl_fm -M am -f 118M -f 120M -f 128.8M -f 119.7M -s 12k -g 30 -l 300 \| play -r 12k -t raw -e s -b 16 -c 1 -V1 -

	-M am AM demodulation		-M am AM demodulation

Onnowpurbo: /* AirBand Scanner */

2019-12-30T02:06:32Z

AirBand Scanner

← Older revision		Revision as of 02:06, 30 December 2019
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	==AirBand Scanner==		==AirBand Scanner==

	rtl_fm -M am -f 118M:137M:25k -s 12k -g 50 -l 280 \| play -r 12k ~~...~~		rtl_fm -M am -f 118M:137M:25k -s 12k -g 50 -l 280 \| play -r 12k -t raw -e s -b 16 -c 1 -V1 -

	-M am AM demodulation		-M am AM demodulation
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	-g 50 same as above		-g 50 same as above
	-l 280 squelch level, exact value varies a lot		-l 280 squelch level, exact value varies a lot




	==Referensi==		==Referensi==

	* http://kmkeen.com/rtl-demod-guide/		* http://kmkeen.com/rtl-demod-guide/

Onnowpurbo: /* Police Scanner */

2019-12-30T02:06:21Z

Police Scanner

← Older revision		Revision as of 02:06, 30 December 2019
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	rtl_fm -M fm -f 154.42M -f 154.75M -f 154.82M -f 154.89M -s 12k -g 50 -l 70 \| play -r 12k ~~...~~		rtl_fm -M fm -f 154.42M -f 154.75M -f 154.82M -f 154.89M -s 12k -g 50 -l 70 \| play -r 12k -t raw -e s -b 16 -c 1 -V1 -


	This one will take a lot more fiddling to work properly. First, you of course need channels used by your municipality. And this will only work if your local services have not upgraded to P25 or some other trunked system.		This one will take a lot more fiddling to work properly. First, you of course need channels used by your municipality. And this will only work if your local services have not upgraded to P25 or some other trunked system.
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	-g 50 set gain to maximum (use a value appropriate to your dongle)		-g 50 set gain to maximum (use a value appropriate to your dongle)
	-l 70 set squelch to 70. The exact values varies a lot. Changing the gain or sample rate will require a change in the squelch to compensate.		-l 70 set squelch to 70. The exact values varies a lot. Changing the gain or sample rate will require a change in the squelch to compensate.



	==AirBand Scanner==		==AirBand Scanner==

Onnowpurbo at 01:59, 30 December 2019

2019-12-30T01:59:43Z

← Older revision		Revision as of 01:59, 30 December 2019
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	apt install sox		apt install sox
	rtl_fm -M wbfm -f 92.0M \| play -r 32k -t raw -e s -b 16 -c 1 -V1 -		rtl_fm -M wbfm -f 92.0M \| play -r 32k -t raw -e s -b 16 -c 1 -V1 -



	rtl_fm -f 92.0M -M fm -s 170k -A fast -r 32k -l 0 -E deemp \| play -r 32k ...		rtl_fm -f 92.0M -M fm -s 170k -A fast -r 32k -l 0 -E deemp \| play -r 32k ...

Onnowpurbo at 01:58, 30 December 2019

2019-12-30T01:58:28Z

← Older revision		Revision as of 01:58, 30 December 2019
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	==FM==		==FM==

			apt install sox
	rtl_fm -M wbfm -f 92.0M \| play -r 32k -t raw -e s -b 16 -c 1 -V1 -		rtl_fm -M wbfm -f 92.0M \| play -r 32k -t raw -e s -b 16 -c 1 -V1 -



	rtl_fm -f 92.0M -M fm -s 170k -A fast -r 32k -l 0 -E deemp \| play -r 32k ...		rtl_fm -f 92.0M -M fm -s 170k -A fast -r 32k -l 0 -E deemp \| play -r 32k ...

Onnowpurbo: Created page with "Sumber: http://kmkeen.com/rtl-demod-guide/ ==FM== rtl_fm -M wbfm -f 92.0M | play -r 32k -t raw -e s -b 16 -c 1 -V1 - rtl_fm -f 92.0M -M fm -s 170k -A fast -r 32k -l 0 -E..."

2019-12-30T01:16:14Z

Created page with "Sumber: http://kmkeen.com/rtl-demod-guide/ ==FM== rtl_fm -M wbfm -f 92.0M | play -r 32k -t raw -e s -b 16 -c 1 -V1 - rtl_fm -f 92.0M -M fm -s 170k -A fast -r 32k -l 0 -E..."

New page

Sumber: http://kmkeen.com/rtl-demod-guide/

==FM==

rtl_fm -M wbfm -f 92.0M | play -r 32k -t raw -e s -b 16 -c 1 -V1 -

rtl_fm -f 92.0M -M fm -s 170k -A fast -r 32k -l 0 -E deemp | play -r 32k ...

'-f ...' indicated the frequency to tune to
-M fm means narrowband FM
-s 170k means to sample the radio at 170k/sec
-A fast uses a fast polynominal approximation of arctangent
-r 32k means to lowpass/resample at 32kHz
-l 0 disables squelch
-E deemp applies a deemphesis filter

==Police Scanner==

rtl_fm -M fm -f 154.42M -f 154.75M -f 154.82M -f 154.89M -s 12k -g 50 -l 70 | play -r 12k ...

This one will take a lot more fiddling to work properly. First, you of course need channels used by your municipality. And this will only work if your local services have not upgraded to P25 or some other trunked system.

-M fm narrowband FM
-f ... frequency to tune, use multiple times for scanning
-s 12k sample rate, about as narrow as possible for FM voice
-g 50 set gain to maximum (use a value appropriate to your dongle)
-l 70 set squelch to 70. The exact values varies a lot. Changing the gain or sample rate will require a change in the squelch to compensate.

==AirBand Scanner==

rtl_fm -M am -f 118M:137M:25k -s 12k -g 50 -l 280 | play -r 12k ...

-M am AM demodulation
-f start:stop:interval a range of frequencies to scan
-s 12k same as above
-g 50 same as above
-l 280 squelch level, exact value varies a lot

==Referensi==

* http://kmkeen.com/rtl-demod-guide/