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FT-857D RX frequency increments for satellites with identical RX and TX frequencies

Abierto
#326 20 comentarios 0 reacciones 0 asignados Ver en GitHub

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Evaluación

Dificultad
4/5
Tiempo estimado
3-5 días
Aptitud para principiantes
15/100
Tipo de issue
Error
Claridad
Bastante claro
Estado de actividad
Estancado
Stack tecnológico
c, linux
Área
desktop-dev

Línea de trabajo

The report points to the transponder file ~/.config/Gpredict/trsp/53106.trsp (its DOWN_LOW and UP_LOW values for the same frequency) and the rig file with Type=4, LO and LO_UP, which the rig-control code reads when Engage is pressed. Start in the gpredict source where the rig is updated during tracking, and check how it handles the Hamlib rigctld connection on localhost:4533. Done means downlink and uplink keep their own frequencies after Engage, which needs an FT-857D or a rigctld simulator to verify.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

This may be related to #294 . I am trying to use gpredict for greencube. To define both the uplink and downlink frequencies, I added the following section to ~/.config/Gpredict/trsp/53106.trsp:

[Mode U GMSK FULL DUPLEX]
DOWN_LOW=435310000
UP_LOW=435310000
MODE=FSK AX.100 Mode 5
BAUD=1200

I defined a rig for this as "FT817/857/897 (auto)" with PTT Status set to "Read PTT". Its .rig file is as follows:

[Radio]
Host=localhost
Port=4533
LO=0
LO_UP=0
Type=4
PTT=1
SIGNAL_AOS=false
SIGNAL_LOS=false

My problem is when I start tracking the satellite and click "Engage", at first everything is normal; both the Downlink and Uplink radio frequencies get updated regularly:
Screenshot from 2023-03-13 18-01-38

After about 7-8 seconds, both the Downlink and Uplink radio frequencies get set to the same (Uplink) frequency and my Downlink frequency automatically shifts up. From this point onwards, my Downlink radio frequency tracks the Uplink radio frequency.
Screenshot from 2023-03-13 18-01-43

Fedora 37, gpredict 2.2.1, hamlib-4.5.4.

Lenguaje dominante
C
Estrellas
1.2k
Forks
305
Merge medio
8 h 48 min
PR fusionados (30 d)
3

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