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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/WLCL2J2OVQKX5MCRMFSPW4NXXNEOICC5/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "WLCL2J2OVQKX5MCRMFSPW4NXXNEOICC5",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/WLCL2J2OVQKX5MCRMFSPW4NXXNEOICC5/",
    "sender": {
        "address": "wa4cwi (a) bellsouth.net",
        "mailman_id": "4aa6f1e3f4cd4bf4b1492e47285ca527",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/4aa6f1e3f4cd4bf4b1492e47285ca527/emails/"
    },
    "sender_name": "Jim McCullers",
    "subject": "[pacsat-dev] Re: Power coming out of AX5043",
    "date": "2024-02-17T15:29:31Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Bob,\n\nAttached is a power analysis done by OnSemi that I discovered after doing\none of my own when I discovered the power output was not linear as the\nprogramming manual implies and several project samples utilize.\nAs is was copyrighted material I did not believe it was appropriate to put\non github.\n\nMy analysis was in line with the document.  They also did an output to\nvoltage analysis which leads me to believe your 3.3 volt power supply is not\na factor in the low output.\n\n0x0fff is the eleven setting.  Crank it up!\n\nJim \n\nI did test a board today and found it was transmitting every 30 seconds with\na power level of about -28 dBm. \n\nI spent some time looking at the code and found where the power level is set\nto ox0d in a config file and get AX reports this value. \n\nI see in the data sheet for AX5043 where power should range from -10 dB to\n16 dB and uses a 12 bit value to set the level. Possibly we are just\nadjusting upper 8 bits. \n\nWe will also be losing power in the differential to single ended converter\nand shaping circuit. I will probe on this a little more tomorrow but likely\njust leave it alone and move on for now to be sure and ship boards Monday. \n\nI also see the 30 second interval in the code and some other comments about\nsetting power but does not seem like this is being used. \n\nI could not get a continuous tone and I did not spend time setting up a\ntight loop to transmit. \n\nI did change the call sign in the configuration to mine. \n\nBob\n\n-----------------------------------------------------------\n\npacsat-dev mailing list -- [email protected] View archives of this\nmailing list at\nhttps://mailman.amsat.org/hyperkitty/list/[email protected]\nTo unsubscribe send an email to [email protected] Manage all of\nyour AMSAT-NA mailing list preferences at https://mailman.amsat.org\n",
    "attachments": [
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            "email": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/WLCL2J2OVQKX5MCRMFSPW4NXXNEOICC5/",
            "counter": 2,
            "name": "AX5043_AND9314-D_PowerAnalysis.PDF",
            "content_type": "application/pdf",
            "encoding": null,
            "size": 170930,
            "download": "https://mailman.amsat.org/hyperkitty/list/[email protected]/message/WLCL2J2OVQKX5MCRMFSPW4NXXNEOICC5/attachment/2/AX5043_AND9314-D_PowerAnalysis.PDF"
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    ]
}