CC110L: CCA implementation in CC110L

Hi 

   I am trying to understand the CCA mode of CC110L. I Have few Queries related to implementation of CC110L CCA mode.

    First i will state my register setting related to CCA implementation

    my register setting related to this mode

    MCSM1 = 0x3F

    AGCCTRL2 = 0x43 [33 dB]

    AGCCTRL1 = 0x40 

    IOCFG2 = 0x09 

So basically i have set the threshold value to 33 dB and i am observing status of GDO2 on oscilloscope to check whether my current channel is clear on not.

HIGH :- Channel Clear

LOW :- Channel Busy

My Queries

1> I have a customized CC110L Board and i have set it on Channel 0, Rx mode, with above CCA mode setting. when i observe the GDO2 pin of this module i see some random HIGH to Low transition

but no RF communication is going on near by on channel 0.

2> Now with TI CC110L module i send some random data on channel 0 at 10 ms interval. when i observe GDO2 of my custom Board it shows high to low transition (indicating some communication is going on on channel 0) at 10 ms rate which is correct but i also see some random High to Low on GDO2 also which should not be there.

3>Now even if i switch the channel on which TI's CC110L module is sending data to 0,1,2,3,4 still the GDO2 pin of my custom Board which is on Channel 0 shows Channel 0 is busy exactly same as when TI's CC110L module was sending data on channel 0.

Any help ?

Thanks in advance. 

 NOTE :-----------------------------------------------------------------------------------------------------------------------------------

My complete settings are as below

const u8 uc_CC110L_Config[48]=
{
0x09, // IOCFG2 GDO2 Output Pin Configuration
0x2F, // IOCFG1 GDO1 Output Pin Configuration
0x07, // IOCFG0 GDO0 Output Pin Configuration 
0x4F, // FIFOTHR RX FIFO and TX FIFO Thresholds
'G', // SYNC1 Sync Word, High Byte
'N', // SYNC0 Sync Word, Low Byte
61, // PKTLEN Packet Length
0x0D, // PKTCTRL1 Packet Automation Control
0x05, // PKTCTRL0 Packet Automation Control
0x00, // ADDR Device Address
0x00, // CHANNR Channel number
0x06, // FSCTRL1 Frequency Synthesizer Control
0x00, // FSCTRL0 Frequency Synthesizer Control
0x10, // FREQ2 Frequency Control Word, High Byte
0xA7, // FREQ1 Frequency Control Word, Middle Byte
0x62, // FREQ0 Frequency Control Word, Low Byte
0xCA, // MDMCFG4 Modem Configuration
0x83, // MDMCFG3 Modem Configuration
0x12, // MDMCFG2 Modem Configuration
0x22, // MDMCFG1 Modem Configuration
0xF8, // MDMCFG0 Modem Configuration
0x35, // DEVIATN Modem Deviation Setting
0x07, // MCSM2 Main Radio Control State Machine Configuration
0x3F, // MCSM1 Main Radio Control State Machine Configuration
0x18, // MCSM0 Main Radio Control State Machine Configuration
0x16, // FOCCFG Frequency Offset Compensation Configuration
0x6C, // BSCFG Bit Synchronization Configuration
0x43, // AGCCTRL2 AGC Control
0x40, // AGCCTRL1 AGC Control
0x91, // AGCCTRL0 AGC Control
0, // not used
0, // not used
/*------------------------------------------------------------------------*/
0xFB, // RESERVED_0X20 Use setting from SmartRF Studio
/*------------------------------------------------------------------------*/
0x56, // FREND1 Front End RX Configuration
0x10, // FREND0 Front End TX Configuration
0xE9, // FSCAL3 Frequency Synthesizer Calibration
0x2A, // FSCAL2 Frequency Synthesizer Calibration
0x00, // FSCAL1 Frequency Synthesizer Calibration
0x1F, // FSCAL0 Frequency Synthesizer Calibration
/*------------------------------------------------------------------------*/
0, // not used
0, // not used
0x59, // RESERVED_0X29 Use setting from SmartRF Studio
0x7F, // RESERVED_0X2A Use setting from SmartRF Studio
0x3F, // RESERVED_0X2B Use setting from SmartRF Studio
/*------------------------------------------------------------------------*/
0x81, // TEST2 Various Test Settings
0x35, // TEST1 Various Test Settings
0x09, // TEST0 Various Test Settings
/*------------------------------------------------------------------------*/
0xC0 // PATABLE +10dbm
};