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{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/Z5U7K4KCNGJXFMA6QWWQ6J45LG3LBBMW/", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/", "message_id": "CANsNeaoMsTtohWPZbb-3XHfHCHG92WOxKT2ZzOe7HyozWpxGbA@mail.gmail.com", "message_id_hash": "Z5U7K4KCNGJXFMA6QWWQ6J45LG3LBBMW", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/Z5U7K4KCNGJXFMA6QWWQ6J45LG3LBBMW/", "sender": { "address": "rich (a) ourowndomain.com", "mailman_id": "de4e965f89da4d4790638af3cb47f33c", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/de4e965f89da4d4790638af3cb47f33c/emails/" }, "sender_name": "Rich Gopstein", "subject": "[pacsat-dev] Fwd: ax5043 RSSI calibration", "date": "2023-04-28T19:54:39Z", "parent": null, "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "FYI...\n\n---------- Forwarded message ---------\nFrom: Rich Gopstein <[email protected]>\nDate: Sun, Feb 28, 2021, 5:04 PM\nSubject: Re: ax5043 RSSI calibration\nTo: Burns Fisher (AMSAT) <[email protected]>, Zach Metzinger <\[email protected]>, Eric Skoog <[email protected]>\n\n\nAnd I just double checked the secondary ax5043 again - and it varied in the\n-97 to -90 range with a dummy load, but didn't go any lower than that.\n\nNote that on my board, I don't have mmcx connectors, only coax soldered to\nthe board with SMA connectors on the other end, so maybe that's the problem?\n\nRich\n\n\nOn Sun, Feb 28, 2021 at 4:51 PM Rich Gopstein <[email protected]> wrote:\n\n> Sorry - you're right - I just checked my notes again, and one of my two\n> ax5043's did go down to -115 with a dummy load. The other only went down\n> to -90 or so.\n>\n> Rich\n>\n>\n> On Sun, Feb 28, 2021 at 4:50 PM Burns Fisher (AMSAT) <[email protected]>\n> wrote:\n>\n>> Hmm. Odd. With no signal being sent at all, I'm at -114 or so. Do you\n>> get that kind of value with no signal in the air?\n>>\n>> Good to know it is pretty good though. And on the other end, we are\n>> unlikely to get a signal as strong as -27!\n>>\n>> Thanks for checking!\n>>\n>> 73,\n>>\n>> Burns Fisher, WB1FJ\n>> *AMSAT(R) Flight Software*\n>>\n>>\n>> On Sun, Feb 28, 2021 at 4:44 PM Rich Gopstein <[email protected]>\n>> wrote:\n>>\n>>> Using the new \"get rssi\" command, I checked the calibration of the RSSI\n>>> when driven with my HP signal generator tuned to the input frequency.\n>>>\n>>> The reported values closely (within 2-3 dBm) matched the generated power\n>>> between -90 dBm and -30 dBm. -27 dBm was the largest RSSI value reported\n>>> by the ax5043 even with increasing input power.\n>>>\n>>> One of the two ax5043s was able to go down to -97 dBm, the other one\n>>> only went down to -90 dBm (more or less).\n>>>\n>>> Rich\n>>>\n>>>\n\n\n", "attachments": [ { "email": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/Z5U7K4KCNGJXFMA6QWWQ6J45LG3LBBMW/", "counter": 2, "name": "attachment.html", "content_type": "text/html", "encoding": "utf-8", "size": 4287, "download": "https://mailman.amsat.org/hyperkitty/list/[email protected]/message/Z5U7K4KCNGJXFMA6QWWQ6J45LG3LBBMW/attachment/2/attachment.html" } ] }