BOOSTXL-CC1120-90: CC1120EM-868-915-RD

PAVANAKUMAR A G

Part Number: BOOSTXL-CC1120-90
Other Parts Discussed in Thread: CC1190, CC1120

Tool/software:

I am working on a CC1120 + CC1190 custom board with a carrier frequency of 868 MHz, using the following configuration:

Bit rate: 1.2 kbps
RX filter bandwidth: 7.8 kHz
Modulation format: 2-GFSK
Frequency deviation: 1.5 kHz
Transmit power: 27 dBm

I configured the registers as per SmartRF Studio:

{IOCFG3, 0x06},
 {IOCFG2, 0x33},
 {IOCFG1, 0xB0},
 {IOCFG0, 0x73},
 {SYNC3, 0xD3},
 {SYNC2, 0x91},
 {SYNC1, 0xD3},
 {SYNC0, 0x91},
 {SYNC_CFG1, 0x0B},
 {DEVIATION_M, 0x99},
 {MODCFG_DEV_E, 0x05},
 {DCFILT_CFG, 0x15},
 {PREAMBLE_CFG1, 0x18},
 {FREQ_IF_CFG, 0x3A},
 {IQIC, 0x00},
 {CHAN_BW, 0x04},
 {MDMCFG0, 0x05},
 {SYMBOL_RATE2, 0x43},
 {SYMBOL_RATE1, 0xA9},
 {SYMBOL_RATE0, 0x2A},
 {AGC_REF, 0x3C},
 {AGC_CS_THR, 0xEF},
 {AGC_CFG1, 0xA9},
 {AGC_CFG0, 0xC0},
 {FIFO_CFG, 0x00},
 {SETTLING_CFG, 0x0B},
 {FS_CFG, 0x12},
 {PKT_CFG2, 0x04},
 {PKT_CFG1, 0x04},
 {PKT_CFG0, 0x20},
 {PA_CFG2, 0x77},
 {PA_CFG1, 0x56},
 {PA_CFG0, 0x7E},
 {PKT_LEN, 0xFF},
 {IF_MIX_CFG, 0x00},
 {FREQOFF_CFG, 0x20},
 {FREQ2, 0x6C},
 {FREQ1, 0x80},
 {FS_DIG1, 0x00},
 {FS_DIG0, 0x5F},
 {FS_CAL1, 0x40},
 {FS_CAL0, 0x0E},
 {FS_DIVTWO, 0x03},
 {FS_DSM0, 0x33},
 {FS_DVC0, 0x17},
 {FS_PFD, 0x50},
 {FS_PRE, 0x6E},
 {FS_REG_DIV_CML, 0x14},
 {FS_SPARE, 0xAC},
 {FS_VCO0, 0xB4},
 {XOSC5, 0x0E},
 {XOSC1, 0x03},

I have enabled PA_EN for transmission and LNA_EN for reception.

Issue:

Wireless transmission and reception distance maximum I can achieve 150meters, how can I improve the range and is there other register do I need to configure.

Any guidance or recommendations would be greatly appreciated.

Thanks in advance!

2 months ago

0 ZC 2 months ago

TI__Genius 15605 points

Hi,

Please step through this App Note: SWRA603 (Debugging Communication Range): https://www.ti.com/lit/swra603

Have you tried a range test using any of the default settings from SmartRF Studio to verify that it is not your PHY settings?

Regards,

Zack

0 PAVANAKUMAR A G 2 months ago in reply to ZC

Prodigy 60 points

Thank you for the replay

I tried with the software examples in swre253e CC1120 Long range example, but the register settings is diffrent from SmartRF Studio, Please suggest me which one do I need to preffer, My carrier frequency is 868MHz and bit rate should be 4.8kbps to 9.6kbps and range of transmission should be around 300meters without line of sight, and 1000meters with line of sight

0 ZC 2 months ago in reply to PAVANAKUMAR A G

TI__Genius 15605 points

Hi,

To my knowledge you should test with the SmartRF Studio settings. Please share your results using SmartRF Studio once you have finished them and we can advise on the next steps.

You can use the following tool for estimating the expected range: RF Range Estimator: https://www.ti.com/tool/RF-RANGE-ESTIMATOR

The accompanying App Note explains how to use it and gives further useful information: SWRA479 (Achieving Optimum Radio Range): https://www.ti.com/lit/swra479

Regards,

Zack

0 TheGhostOf 2 months ago in reply to ZC

Mastermind 6360 points

Why do you use 868 MHz? If you want to use +27 dBm you have to use the correct sub band.

But: The headline on this page https://www.ti.com/tool/BOOSTXL-CC1120-90 indicate that this boosterpack has a SAW filter that are selected for a different band, if you want to use it in EU, you have to swap the SAW filter.

Sub-1 GHz

Sub-1 GHz forum

BOOSTXL-CC1120-90: CC1120EM-868-915-RD

Issue: