DOKK / manpages / debian 12 / gr-osmosdr / osmocom_fft.1.en
osmocom_fft(1) User Commands osmocom_fft(1)

osmocom_fft - Spectrum Browser

osmocom_fft [options]

Spectrum Browser

show this help message and exit
Device args, [default=]
Select RX antenna where appropriate
Set sample rate (bandwidth), minimum by default
Set frequency to FREQ
Set frequency correction (ppm)
Set gain in dB (default is midpoint)
Enable waterfall display
Enable oscilloscope display
Set fftsink averaging factor, default=[0.1]
Enable fftsink averaging, default=[False]
Set dBFS=0dB input value, default=[1.0]
Set number of FFT bins [default=1024]
Set FFT update rate, [default=30]
Use verbose console output [default=False]

SEE ALSO

The full documentation for linux; is maintained as a Texinfo manual. If the info and linux; programs are properly installed at your site, the command

info linux;

should give you access to the complete manual.

You can specify the source or sink device using a comma separated string of argument=value pairs. The always-up-to-date block documentation with examples is available ​right here.

Notes
0-based device identifier, optional
overrides the audio device
selects the dongle type, 1 for Classic, 2 for Pro+

The "device" argument overrides the audio device used by the underlying driver to access the dongle's IQ sample stream.

The "type" argument selects the dongle type, 1 for Classic, 2 for Pro+.

Notes
0-based device identifier
Default is 32
Default is 256kB, must be multiple of 512

Notes
0-based device identifier OR serial number
Frequency (Hz) used for the RTL chip, accepts eng notation
Frequency (Hz) used for the tuner chip, accepts eng notation
Default is 32
Default is 256kB, must be multiple of 512
Enable direct sampling mode on the RTL chip. 0: Disable, 1: use I channel, 2: use Q channel
Enable offset tune mode for E4000 tuners

NOTE: use rtl_eeprom -s to program your own serial number to the device

NOTE: if you don't specify rtl_xtal/tuner_xtal, the underlying driver will use 28.0MHz

Notes
hostname defaults to "localhost", port to "1234"
Default is 16384 bytes
Enable direct sampling mode on the RTL chip 0=Off, 1=I-ADC input enabled, 2=Q-ADC input enabled
Enable offset tune mode for E4000 tuners

Notes
0-based device identifier
Default is 32

Argument Notes

Use this argument without a value
For multichannel USRP configurations use the subdev parameter to specify stream mapping
Examples: "A:0", "B:0", "A:0 B:0" when nchan=2. Refer original ettus documentation on this
Offset frequency in Hz, must be within daughterboard bandwidth. Accepts eng notation

Additional argument/value pairs will be passed to the underlying driver, for more information see ​specifying the subdevice and ​common device identifiers in the Ettus documentation.

Notes
0-based device identifier (optional)
program MCU firmware from given file. usually not needed. power cycle required.
load FPGA bitstream from given file. required only at first run at the moment.

Notes
Use this argument without a value
Default is 32

Only the first device found may be used at the moment because of libhackrf limitation.

Transmit support has been verified by using the crc-mmbTools DAB sdr transmitter.

Notes
Center frequency in Hz, accepts eng notation
Mandatory, in samples/s, accepts eng notation
Default is true
Throttle flow of samples, default is true

osmocom_fft -a rtl=0 -v -f 100e6 -s 2.4e6 -g 15

osmocom_fft -a hackrf -v

osmocom_fft -a uhd -v

SEE ALSO

osmocom_siggen(1) osmocom_siggen_nogui(1) osmocom_spectrum_sense(1)

October 2013 OSMOCOM