RM0453 Rev 2 199/1454
RM0453 Sub-GHz radio (SUBGHZ)
217
CalibrateImage() command
CalibrateImage(CalFreq1, CalFreq2) allows the image to be calibrated at given
frequencies, at any time when in Standby mode. The calibration frequencies are defined by
CalFreq1 and CalFreq2. When the calibration is ongoing, BUSY is set. A falling edge on
BUSY indicates the end of calibration. Once performed, the calibration is valid for all
frequencies between the two selected calibration frequencies. Any ISM band can be
covered by selecting the applicable frequency for CalFreq1 and CalFreq2
By default, the image calibration is made in the band 902 - 928 MHz. Nevertheless it is
possible to request a new calibration at other frequencies.
byte 1 bit 7 Reserved, must be kept at reset value.
bit 6 CalibCfg_Image: Image calibration
0: Image calibration disabled
1: Image calibration enabled
bit 5 CalibCfg_AdcBulkP: RF-ADC bulk P calibration
0: RF-ADC bulk P calibration disabled
1: RF-ADC bulk P calibration enabled
bit 4 CalibCfg_AdcBulkN: RF-ADC bulk N calibration
0: RF-ADC bulk N calibration disabled
1: RF-ADC bulk N calibration enabled
bit 3 CalibCfg_AdcPulse: RF-ADC pulse calibration
0: RF-ADC pulse calibration disabled
1: RF-ADC pulse calibration enabled
bit 2 CalibCfg_Pll: RF-PLL calibration
0: RF-PLL calibration disabled
1: RF-PLL calibration enabled
bit 1 CalibCfg_RC13M: Sub-GHz radio RC 13 MHz calibration
0: Sub-GHz radio RC 13 MHz calibration disabled
1: Sub-GHz radio RC 13 MHz calibration enabled
bit 0 CalibCfg_RC64K: Sub-GHz radio RC 64 kHz calibration
0: Sub-GHz radio RC 64 kHz calibration disabled
1: Sub-GHz radio RC 64 kHz calibration enabled
Table 38. Image calibration for ISM bands
ISM band [MHz] CallFreq1 CallFreq2
430 - 440 0x6B 0x6F
470 - 510 0x75 0x81
779 - 787 0xC1 0xC5
863 - 870 0xD7 0xDB
902 - 928 0xE1 (default) 0xE9 (default)
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