I have been trying to help a newbie get a broadcast FM receiver working
with a LimeSDR USB.
The OS is ubuntu 18.04; gnuradio version is 3.8.0.0
The user has loaded
https://github.com/myriadrf/gr-limesdr/blob/master/examples/FM_receiver.grc
but it is built for GR 3.7
* should it work for GR 3.8?
Right now the Frequency sink just shows random noise.
* are there any other working examples for GR 3.8 available?
Here is output from the console:
LimeSuite Source (RX) info
##################
LimeSuite version: 19.04.1-ga5b3a10f
gr-limesdr version: 3.0.0.0
##################
Device list:
Nr.:0 device:LimeSDR-USB, media=USB 3.0, module=FX3, addr=1d50:6108,
serial=0009081C05C13425
##################
INFO: device_handler::enable_channels(): SISO CH0 set for device number
0.
INFO: device_handler::set_samp_rate(): set sampling rate: 2 MS/s.
INFO: device_handler::set_rf_freq(): RF frequency set [RX]: 88.1 MHz.
INFO: device_handler::set_analog_filter(): RX LPF configured
INFO: device_handler::set_digital_filter(): digital filter CH0 [RX]: 1.8
MHz.
INFO: device_handler::set_gain(): set gain [RX] CH0: 30 dB.
INFO: device_handler::set_antenna(): CH0 antenna set [RX]: LNAL.
INFO: device_handler::calibrate(): Rx calibration finished
On the "Properties: LimeSDR Source (RX)" screen:
Channel A Properties:
NCO frequency
Calibration bandwidth
LNA path
Analog filter bandwidth
Digital filter bandwidth
Gain (dB)
* What should these parameters be set to?
* is the output signal centered at the RF frequency, or is there an
offset?
on the board there are RX1_L, RX_H, RX_W, RX2_L, RX2_H, RX2_W connectors
INFO: device_handler::set_antenna(): CH0 antenna set [RX]: LNAL.
* which connector corresponds to LNAL? Is it RX1_L?
Any help will be much appreciated!
--
Barry Duggan KV4FV
