When I use the LimeSuite Source through GNU radio the calibration fails with the following error: (italized in the trace):
INFO: device_handler::calibrate(): Rx calibration: MCU error 5 (Loopback signal weak: not connected/insufficient gain?)
This is the rest of the trace
INFO: device_handler::set_chip_mode(): SISO mode set for device number 0.
INFO: device_handler::set_rf_freq(): RF frequency set [RX]: 1419.6 MHz.
INFO: device_handler::set_samp_rate(): set [RX] sampling rate: 15 MS/s.
INFO: device_handler::set_analog_filter(): RX LPF configured
Configured bandwidth: 4.5 MHz.
INFO: device_handler::set_digital_filter(): digital filter channel 0 [RX]: 4.5 MHz.
INFO: device_handler::set_antenna(): channel 0 antenna set [RX]: LNAL.
INFO: device_handler::set_gain(): set gain [RX]: 60 dB.
INFO: device_handler::calibrate(): Rx calibration: MCU error 5 (Loopback signal weak: not connected/insufficient gain?)
INFO: source_impl::init_stream(): source channel 0 (device nr. 0) stream setup done.
gr::buffer::allocate_buffer: warning: tried to allocate
27 items of size 2400. Due to alignment requirements
128 were allocated. If this isn’t OK, consider padding
your structure to a power-of-two bytes.
On this platform, our allocation granularity is 4096 bytes.
gr::buffer::allocate_buffer: warning: tried to allocate
54 items of size 1200. Due to alignment requirements
256 were allocated. If this isn’t OK, consider padding
The LimeSuite Source parameters I thought might be relevant
Chip mode: SISO
Ch0:A (B also fails)
RF frequency: 1.14196G
Sample rate: 15M
Oversample: Default
NCO frequency: 0
CMIX mode: UPCONVERT
Calibration:On
LNA path:L
Analog filter: On
Digital filter: On
Calibrating through LimeSuite works, trying the calibration in LimeSDR USB Signal issue - #17 by jslatten
We need to calibrate using gnuradio because it sets up DSP filters.
I am running Ubuntu 16.04.4 LTS