NAME

       osmocom_fft - Spectrum Browser

SYNOPSIS

       osmocom_fft [options]

DESCRIPTION

       Spectrum Browser

OPTIONS

       -h, --help
              show this help message and exit

       -a ARGS, --args=ARGS
              Device args, [default=]

       -A ANTENNA, --antenna=ANTENNA
              Select RX antenna where appropriate

       -s SAMP_RATE, --samp-rate=SAMP_RATE
              Set sample rate (bandwidth), minimum by default

       -f FREQ, --center-freq=FREQ
              Set frequency to FREQ

       -c FREQ_CORR, --freq-corr=FREQ_CORR
              Set frequency correction (ppm)

       -g GAIN, --gain=GAIN
              Set gain in dB (default is midpoint)

       -W, --waterfall
              Enable waterfall display

       -S, --oscilloscope
              Enable oscilloscope display

       --avg-alpha=AVG_ALPHA
              Set fftsink averaging factor, default=[0.1]

       --averaging
              Enable fftsink averaging, default=[False]

       --ref-scale=REF_SCALE
              Set dBFS=0dB input value, default=[1.0]

       --fft-size=FFT_SIZE
              Set number of FFT bins [default=1024]

       --fft-rate=FFT_RATE
              Set FFT update rate, [default=30]

       -v, --verbose
              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.

Device specification

       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.

FCD Source

       Argument
              Notes

       fcd=<device-index>
              0-based device identifier, optional

       device=hw:2
              overrides the audio device

       type=2 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+.

OsmoSDR Source

       Argument
              Notes

       osmosdr=<device-index>
              0-based device identifier

       buffers=<number-of-buffers>
              Default is 32

       buflen=<length-of-buffer>
              Default is 256kB, must be multiple of 512

RTL-SDR Source

       Argument
              Notes

       rtl=<device-index>
              0-based device identifier OR serial number

       rtl_xtal=<frequency>
              Frequency (Hz) used for the RTL chip, accepts eng notation

       tuner_xtal=<frequency>
              Frequency (Hz) used for the tuner chip, accepts eng notation

       buffers=<number-of-buffers>
              Default is 32

       buflen=<length-of-buffer>
              Default is 256kB, must be multiple of 512

       direct_samp=0|1|2
              Enable direct sampling mode on the RTL chip. 0: Disable, 1: use I channel, 2: use Q
              channel

       offset_tune=0|1
              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

RTL-SDR TCP Source

       Argument
              Notes

       rtl_tcp=<hostname>:<port>
              hostname defaults to "localhost", port to "1234"

       psize=<payload-size>
              Default is 16384 bytes

       direct_samp=0|1|2
              Enable  direct  sampling mode on the RTL chip 0=Off, 1=I-ADC input enabled, 2=Q-ADC
              input enabled

       offset_tune=0|1
              Enable offset tune mode for E4000 tuners

Miri Source

       Argument
              Notes

       miri=<device-index>
              0-based device identifier

       buffers=<number-of-buffers>
              Default is 32

UHD Source / Sink

       Argument Notes

       uhd    Use this argument without a value

       nchan=<channel-count>
              For multichannel USRP configurations use the subdev  parameter  to  specify  stream
              mapping

       subdev=<subdev-spec>
              Examples:  "A:0", "B:0", "A:0 B:0" when nchan=2. Refer original ettus documentation
              on this

       lo_offset=<frequency>
              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.

bladeRF Source / Sink

       Argument
              Notes

       bladerf[=0]
              0-based device identifier (optional)

       fw='/path/to/the/firmware.img'
              program MCU firmware from given file. usually not needed. power cycle required.

       fpga='/path/to/the/bitstream.rbf'
              load FPGA bitstream from given file. required only at first run at the moment.

HackRF Source / Sink

       Argument
              Notes

       hackrf Use this argument without a value

       buffers=<number-of-buffers>
              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.

IQ File Source

       Argument
              Notes

       file=<path-to-file-name>

       freq=<frequency>
              Center frequency in Hz, accepts eng notation

       rate=<sampling-rate>
              Mandatory, in samples/s, accepts eng notation

       repeat=true|false
              Default is true

       throttle=true|false
              Throttle flow of samples, default is true

EXAMPLES

       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)