If the GPS light is the light left to the GPS ANT port, then yes it it shining green.
Currently, I have two GPS antennas connected to two X410. The GPS antenna has multiple outputs, I use the "GPS" output and screw it to the SMA connector. Then I probe the module pins (and call the `./sync_to_gps` example). We use a Poynting A-Puck-0005-V1-01 antenna, in case it helps. ________________________________ Von: Marcus D. Leech <[email protected]> Gesendet: Dienstag, 8. März 2022 15:27 An: [email protected] <[email protected]> Betreff: [USRP-users] Re: GPS alarm PIN set to true On 2022-03-08 07:51, Tobias Kronauer wrote: Dear all, I want to synchronize multiple USRP devices using a GPS antenna. I use a X410. Running the example file `./sync_to_gps`, I get the warning that the GPS is not locked (ref is locked however). Further, if I probe the GPS module pins, I receive the following: GPS locked? 0 gps enabled? 1 gps alarm? 1 gps warmed up? 0 gps survey? 0 I am wondering, why the GPS alarm PIN is true... I cannot find any information on this in the documentation. Interestingly, I get the same results if a GPS antenna is NOT connected to the USRP... Plus, the example file prints me a GPSDO timestamp. am I missing something entirely fundamental? Thanks in advance, Tobias Is the GPS light on the USRP illuminated? How are you distributing your GPS antenna signal to your multiple X410s? Looking at the documentation from Jackson Labs for the GPSDO, the "ALARM" signal indicates a hardware fault, which may be nothing more than "I'm not seeing a GPS signal". Barkhausen Institut www.barkhauseninstitut.org Barkhausen Institut gGmbH | Sitz: Würzburger Straße 46, 01187 Dresden, Germany | Registergericht: Amtsgericht Dresden, HRB 37267 | Geschäftsführer: Prof. Dr. Gerhard Fettweis, Dr. Tim Hentschel | Vorsitzender der Gesellschafterdelegation: Dr. Andreas Handschuh Hinweise zum Datenschutz und zur Verarbeitung Ihrer Daten finden Sie unter: https://barkhauseninstitut.org/data-privacy This email and any attachments are intended only for the person to whom this email is addressed and may contain confidential and/or privileged information. If you received this email in error, please do not disclose the contents to anyone, but notify the sender by return email and delete this email (and any attachments) from your system. Information on data protection and processing of your personal information: https://barkhauseninstitut.org/data-privacy
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