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CC1352P7: CC1352P7-4

Ivan Cenov
Prodigy 150 points
Part Number: CC1352P7
Other Parts Discussed in Thread: SYSCONFIG

Tool/software:

Hello,
We were made experiments with this example: rfCarrierWave_LP_CC1352P7_4_tirtos7_ticlang. First on LP-CC1352P7-4 and then on our custom Schematic/PCB at 868MHz. We use SA44B Spectrum Analyzer of Signal Hound as test receiver and their Spike application for visualization.

1. On LP-CC1352P7-4 We were able to produce 868MHz and see the result.

2. On our PCB we did not see the output (except some rare spikes at ~ 868.5Mhz).

Both schematics, related to the sub-GHz antenna path are same as schematics in the Launch pad and in our PCB. Here is what is on our schematic:

The antenna is Helix type.

We need some pointer where to search, what to look for. The example works on LP-CC1352P7-4.

Regards

Ivan Cenov

  • 0
    TI__Mastermind 25967 points

    Hi Ivan,

    I think that by default, the rfCarrierWave example will run at maximum output power, which means 20 dBm.

    Given that the 20 dBm path is not wired on your schematic, it will not be shown on the spectrum analyzer.

    Thankfully, you can change that in SysConfig (rfCarrierWave.syscfg) under here:

    Regards,

    Arthur

  • 0 in reply to Arthur R☑️
    Prodigy 150 points

    We tested by changing the setting you mentioned with different TX powers 1, 4, 6 and 10dBm with no visible effect.
    We use SUB-1GHz antenna and the maximum TX power fort this antenna (in the sysConfig user interface) is 14 dBm.

  • 0 in reply to Ivan Cenov
    TI__Mastermind 33660 points

    Can you measure this conducted first so you can check that you are measuring the designated output power ?

    i.e. remove the antenna and just measure after the DC block. Need to confirm the conducted performance first before bring in the antenna as a new parameter.

    There should be a clear difference in conducted output power from 14 dBm and 1 dBm. 

  • 0 in reply to RGW
    Prodigy 150 points

    As my colleagues said, they restarted again with clean example, and it worked. It seems that our first ever try with CC1352P7-4 was not clean. Now this works and probably we had wrong system configuration.