Public bug reported: When doppler shifting in Gpredict, the static frequency changes. By inserting test points into the source code, we traced this back to hamlib getting feedback from the FT-897 that it interprets to be dial tuning, so it adjusts the static frequency and therefore 'drifts' off frequency. We tried in an older version of hamlib (1.2.10-3) and found this still present as an issue.
The problem was initially thought to lie with Gpredict, but on further troubleshooting is more likely with hamlib (http://ehc.ac/p/gpredict/mailman/message/31445857/). The problem is more obvious at higher frequencies (tested at UHF and VHF, it was more present at UHF). Setup has included all the following combinations: Ubuntu 12.04.1, 14.04, 14.04.1 Gpredict 1.2,1.3,1.4 Hamlib 1.2.15.1-1, 1.2.15.3-2, 1.2.10-3 Yaesu FT-897 Hamlib was activated with rigctld -m 123 -r /dev/ttyUSB0 -s 38400 ** Affects: hamlib (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu ham developers, which is subscribed to hamlib in Ubuntu. https://bugs.launchpad.net/bugs/1357535 Title: Yaesu FT-897 frequency drifts in rigctld Status in “hamlib” package in Ubuntu: New Bug description: When doppler shifting in Gpredict, the static frequency changes. By inserting test points into the source code, we traced this back to hamlib getting feedback from the FT-897 that it interprets to be dial tuning, so it adjusts the static frequency and therefore 'drifts' off frequency. We tried in an older version of hamlib (1.2.10-3) and found this still present as an issue. The problem was initially thought to lie with Gpredict, but on further troubleshooting is more likely with hamlib (http://ehc.ac/p/gpredict/mailman/message/31445857/). The problem is more obvious at higher frequencies (tested at UHF and VHF, it was more present at UHF). Setup has included all the following combinations: Ubuntu 12.04.1, 14.04, 14.04.1 Gpredict 1.2,1.3,1.4 Hamlib 1.2.15.1-1, 1.2.15.3-2, 1.2.10-3 Yaesu FT-897 Hamlib was activated with rigctld -m 123 -r /dev/ttyUSB0 -s 38400 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/hamlib/+bug/1357535/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-hams-devel Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-hams-devel More help : https://help.launchpad.net/ListHelp
