VHF background pattern
Ploends opened this issue · 5 comments
The new extio file has clearly solved the problem of VHF singals in HF spectrum. Well done !
On my RX888 MKII unit I can still observe a significant amount of HF signals travelling into VHF and
creating a background pattern. I have attached a few photos to explain what I observe:
The first photo shows my HF spectrum at 32 MHz bandwidth. RF is set to 0 and IF is set to -25.
All is fine.
The second photo shows the VHF spectrum, also at 32 MHz bandwidth, that I see when I tune into
the FM broadcasting area.
The RF in VHF is set to 0. The IF is -5. One can see some week VHF signals and a pattern of a lot of HF
signals that seem to be mirrored into VHF.
When I tune within the VHF spectrum, the VHF signals move as expected but the background signal
pattern remains the same. The signals of the background pattern do not not move.
On the final photo one can see that the background pattern disappears completely when I
disconnect the HF antenna. Then only the VHF signals remain.
Not sure if this is a Bug or an issue with my MKII unit ?
Dear Oscar,
Thanks for your quick reply. Unfortunately the situation is still the same even with the Extio package from the link that you provided.
Regards
Marcus
Hi Marcus,
Please test this code #189
In the bottom of page you find the compiled extio-package.zip.
Possibly it will decrease the crosstalk by some 30 dB.
BR
Oscar
Hi Oscar,
this is indeed a massive improvement !
Only the 5 strongest AM signal are still visible on the right sight of the 8 MHz VHF window.
These 5 signals are the strongest AM broadcasting stations that I can receive here in Edinburgh.
Thanks
Marcus
I will mark this as resolved unless there is objection.