SX1301 Calibration Test
sgodey opened this issue · 2 comments
Hello:
I am seeing a calibration test failure when I am running it on my RAK2245 concentrator on a RaspberryPi 3B. Below is the log output. Can the experts review this and let me know what is it I am doing wrong?
thanks in advance,
Sreekanth
**pi@raspberrypi:~/deps/lgw/platform-rpi/libloragw $ ./test_loragw_cal -a 925.1 -b 923.3 -t 902.3 -r 1257 -n 2
Library version information: Version: 5.0.1;
Radio type: 2
Radio A frequency: 925.100000 MHz
Radio B frequency: 923.300000 MHz
Number of calibration iterations: 2
Calibration command: brd: 0, chip: 1257, dac: 3
lgw_connect:532: INFO: no FPGA detected or version not supported (v0)
Note: success connecting the concentrator
lgw_setup_sx125x:407: Note: SX125x #0 version register returned 0x21
lgw_setup_sx125x:415: Note: SX125x #0 clock output disabled
lgw_setup_sx125x:469: Note: SX125x #0 PLL start (attempt 1)
lgw_setup_sx125x:407: Note: SX125x #1 version register returned 0x21
lgw_setup_sx125x:412: Note: SX125x #1 clock output enabled
lgw_setup_sx125x:473: Note: SX125x #1 kept in standby mode
WARNING: problem in calibration of radio A for image rejection
Rx A IQ mismatch: Amp: -12 Phi: 16 Rej: 47 dB Status: 135 | Debug: Rej: 50 dB Lna: 1 BB: 15 Dec: 7
Rx A IQ mismatch: Amp: -7 Phi: 13 Rej: 50 dB Status: 143 | Debug: Rej: 52 dB Lna: 1 BB: 15 Dec: 7
Rx B IQ mismatch: Amp: 7 Phi: 7 Rej: 55 dB Status: 151 | Debug: Rej: 60 dB Lna: 1 BB: 15 Dec: 7
Rx B IQ mismatch: Amp: 8 Phi: 8 Rej: 55 dB Status: 151 | Debug: Rej: 58 dB Lna: 1 BB: 15 Dec: 7
Tx A calibration bypassed
Tx B calibration bypassed
Rx A IQ mismatch calibration statistics on 2 iterations (min, max):
Amp: -12 -7 Phi: 13 16 Rej: 47 50 dB (capt.: 50 52 dB)
Rx B IQ mismatch calibration statistics on 2 iterations (min, max):
Amp: 7 8 Phi: 7 8 Rej: 55 55 dB (capt.: 58 60 dB)
Note: success disconnecting the concentrator
End of radio calibration test
pi@raspberrypi:~/deps/lgw/platform-rpi/libloragw $**
Below is calibration log which report problem with radio A for image rejection and radio B for TX imbalance.
Can experts comment on this? Is my concentrator bad?
pi@raspberrypi:~/deps/lgw/platform-rpi/libloragw $ ./test_loragw_cal -a 925.1 -b 923.3 -t 3 -r 1257 -n 10
Library version information: Version: 5.0.1;
Radio type: 2
Radio A frequency: 925.100000 MHz
Radio B frequency: 923.300000 MHz
Number of calibration iterations: 10
Calibration command: brd: 0, chip: 1257, dac: 3
lgw_connect:532: INFO: no FPGA detected or version not supported (v0)
Note: success connecting the concentrator
lgw_setup_sx125x:407: Note: SX125x #0 version register returned 0x21
lgw_setup_sx125x:415: Note: SX125x #0 clock output disabled
lgw_setup_sx125x:469: Note: SX125x #0 PLL start (attempt 1)
lgw_setup_sx125x:407: Note: SX125x #1 version register returned 0x21
lgw_setup_sx125x:412: Note: SX125x #1 clock output enabled
lgw_setup_sx125x:473: Note: SX125x #1 kept in standby mode
Rx A IQ mismatch: Amp: -6 Phi: 18 Rej: 50 dB Status: 143 | Debug: Rej: 46 dB Lna: 1 BB: 15 Dec: 7
WARNING: problem in calibration of radio A for image rejection
Rx A IQ mismatch: Amp: -10 Phi: 15 Rej: 48 dB Status: 135 | Debug: Rej: 45 dB Lna: 1 BB: 15 Dec: 7
WARNING: problem in calibration of radio A for image rejection
Rx A IQ mismatch: Amp: -11 Phi: 13 Rej: 48 dB Status: 135 | Debug: Rej: 46 dB Lna: 1 BB: 15 Dec: 7
Rx A IQ mismatch: Amp: -9 Phi: 15 Rej: 51 dB Status: 143 | Debug: Rej: 44 dB Lna: 1 BB: 15 Dec: 7
WARNING: problem in calibration of radio A for image rejection
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Tx B DC offset I : 90 26 -86 123 -49 84 -46 -24
Tx B DC offset Q : 82 -84 37 -106 -20 -14 125 39
Tx B DC rejection: 28 26 25 22 25 20 25 27
Tx B DC debug BB : 15 15 15 15 15 15 15 15
Tx B DC debug Dec: 7 7 7 7 7 7 7 7
Tx B DC Status : 199
WARNING: problem in calibration of radio B for TX imbalance
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