Hello,
I am already working on a software-patch for the sf8008 to extend the frequency-range.
All the secret ist in the file "hi-dvb.ko" and its RDA5815-relevant sub-part.
I was successful in disassembling the binary (kernel-module)-code, which is quite identical
to the SiLabs-source for RDA5815M, which can be found (SiLabs-superset) on github.
After removing some restrictions, I am able to tune the IF @ 885...2360 MHz. That is not
enough, because the RDA-tuner has 2 oszillators and for reaching lower frequencies,
some programmable deviders and registers of the chip need to be changed.
Unfortunately only an electrical datasheet ca be found in the internet and I need a
programmers document to continue my modifications (has someone more informations?).
It is true, that the tuner is able to receive IF-signals from 250MHz to 2300MHz and above.
With successful modification, the Octagon should receive QO-100-WB together with normal
unmodified (9750MHz) LNBs.
Another aspect could be a software-modification of the afc-behavior, to remain on frequency,
even if strong signals are on neighbor-channels.
Anyhow, would be nice, if another OM has more knowlege than me in programming the ARM-
processor of the SF8008...
vy73s
Manfred, DL1JM
@Baris: I had sent you some email, but no response!?