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Hot!RF215 transmission time on MR-O-QPSK is much slower then expected

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jjexy
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2017/11/01 23:51:19 (permalink)
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RF215 transmission time on MR-O-QPSK is much slower then expected

Hi guys
I had a project involving RF215v1 module with MR-O-QPSK, 100kchiprate, rate mode 3 in EU band. According to 15g, the bit rate is up to 50kb/s and my frame is about 35 bytes. Therefore, the time on the fly is about 5.6ms for PSDU and little extra for SHR, PHR, and other delays.
 
But when I use CNTC to count TX time with reset on TX command and read at TX end, the result is about 27ms. I confirmed the measurement with oscilloscope and toggled pins.
 
After that, I bought SAM4S Xpro with RF215 extend board just to check my register settings with performance analyzer. In my view point the setting checks out. 
 
Eventually, I put chat application (AT13282) to the board, disabling auto ACK, change rate mode to 3 and measure the TX time the same way. I got the same result as before... for 35 byte of data, it takes about 27ms...  
So, I tried 2.4G with application's default setting, the TX time is around 25ms.
 
Is it actually the correct TX time, if I misunderstanding the standard or datasheet? Or could it be something with the chip?
#1

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    sunnykillz
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    Re: RF215 transmission time on MR-O-QPSK is much slower then expected 2019/10/29 04:42:03 (permalink)
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    Hi 
    Is it possible to share this chat application?.I am unable to find it.
    I also didnot get it with the package.
    #2
    Jim Nickerson
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    Re: RF215 transmission time on MR-O-QPSK is much slower then expected 2019/10/29 05:56:25 (permalink)
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    sunnykillz
    Hi 
    Is it possible to share this chat application?.I am unable to find it.
    I also didnot get it with the package.


    a quick google showed the location for the download Smile: Smile
    #3
    sunnykillz
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    Re: RF215 transmission time on MR-O-QPSK is much slower then expected 2019/10/29 07:38:19 (permalink)
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    Yes you are right quick google showed it but thats for BLE ,not for ATREB215 RF transceiver(As I specified in earlier post).
     
    :)
    #4
    ric
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    Re: RF215 transmission time on MR-O-QPSK is much slower then expected 2019/11/03 18:44:20 (permalink)
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    sunnykillz
    ... thats for BLE ,not for ATREB215 RF transceiver(As I specified in earlier post).

    Where?
    I can see no mention of that in your first post.

    I also post at: PicForum
    Links to useful PIC information: http://picforum.ric323.co...opic.php?f=59&t=15
    NEW USERS: Posting images, links and code - workaround for restrictions.
    To get a useful answer, always state which PIC you are using!
    #5
    sunnykillz
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    Re: RF215 transmission time on MR-O-QPSK is much slower then expected 2019/11/04 14:22:13 (permalink)
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    Sorry but I got it.
    If anyone need then let me know.
    #6
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