Why not make an option for the SDRplay to configure the receiver/spectrum the way you want?
I mean:

Spectrum x/x/x/x/x/x/10Mhz
Centerfreq xMHz
then auto adjust the fall off's, like each side minus 250KHz (typical filter drop)
Or warn that it drops.
Then ask min/max freq to show.

I would expect 10MHz to do 0-9MHz, but start at 0 and stop at 9MHz, as such show the usefull spectrum not the rest.
And center should be 4.5MHz.

Quote from: Bas ON5HB on Oct 05, 2026, 04:24 PMI have tested the SDRplay, but your settings are just 1 band.
While the SDRplay can easily do 10MHz spectrum, but about 9.5 usable because of the bandfilters.
When I set 10MHz in the fern.conf, it receives just fine, but won't go 0-10MHz but only starts at 800KHz.

Center 5000000, when I lower center to 4000000 then it does go lower but the spectrum becomes negative.

You have to rethink this for the SDRplay.

This is true, about 95% of the spectrum is useable and currently only 80% is shown. I will adjust this. You can already do that with high and low parameters in the config but its to complicated. It should be 100% and adjustable to less. Otherwise its very confusing. I agree

[band:hf-wide]
name = HF Spectrum
source = module
module = sdrplay
sample_rate = 8000000
center = 7500000
signal = iq
hours = always
 this works for me though.. using a rspi1a for this

Yes Airspy support is planned. Its the next module that will be added

I appreciate the testing, this seems like a bug. I will put this into the 0.1.2 version which should be out later today

I'm missing the Airspy support.

Is that planned?

I have tested the SDRplay, but your settings are just 1 band.
While the SDRplay can easily do 10MHz spectrum, but about 9.5 usable because of the bandfilters.
When I set 10MHz in the fern.conf, it receives just fine, but won't go 0-10MHz but only starts at 800KHz.

Center 5000000, when I lower center to 4000000 then it does go lower but the spectrum becomes negative.

You have to rethink this for the SDRplay.

I tested with my RX888MK2, it finds it under modules, it tells me that the Firmware is loaded, I can see it under LSUSB.

But it won't start, keep telling me this, tested various USB-3 cables even the original it keeps saying this:

fern-rx888 0.1.0 with libusb 1.0.30
no RX-888 is plugged in. Check that it sits in a USB 3 port and that lsusb lists Cypress 04b4:00f3 or 04b4:00f1
fern-rx888 0.1.0 with libusb 1.0.30
no RX-888 is plugged in. Check that it sits in a USB 3 port and that lsusb lists Cypress 04b4:00f3 or 04b4:00f1
fern-rx888 0.1.0 with libusb 1.0.30
no RX-888 is plugged in. Check that it sits in a USB 3 port and that lsusb lists Cypress 04b4:00f3 or 04b4:00f1
fern-rx888 0.1.0 with libusb 1.0.30
no RX-888 is plugged in. Check that it sits in a USB 3 port and that lsusb lists Cypress 04b4:00f3 or 04b4:00f1
fern-rx888 0.1.0 with libusb 1.0.30
no RX-888 is plugged in. Check that it sits in a USB 3 port and that lsusb lists Cypress 04b4:00f3 or 04b4:00f1
fern-rx888 0.1.0 with libusb 1.0.30
no RX-888 is plugged in. Check that it sits in a USB 3 port and that lsusb lists Cypress 04b4:00f3 or 04b4:00f1
fern-rx888 0.1.0 with libusb 1.0.30
loading the built-in firmware into the FX3 at USB port 1-4
the RX-888 at USB port 1-4 did not come back with its firmware running within 6 seconds. Unplug it and plug it in again; if this repeats, try another USB 3 port or cable
fern-rx888 0.1.0 with libusb 1.0.30
loading the built-in firmware into the FX3 at USB port 2-4
the RX-888 at USB port 2-4 did not come back to its bootloader within 6 seconds. Unplug it and plug it in again; if this repeats, try another USB 3 port or cable
fern-rx888 0.1.0 with libusb 1.0.30
loading the built-in firmware into the FX3 at USB port 1-4
the RX-888 at USB port 1-4 did not come back with its firmware running within 6 seconds. Unplug it and plug it in again; if this repeats, try another USB 3 port or cable
fern-rx888 0.1.0 with libusb 1.0.30
loading the built-in firmware into the FX3 at USB port 2-4
the RX-888 at USB port 2-4 did not come back to its bootloader within 6 seconds. Unplug it and plug it in again; if this repeats, try another USB 3 port or cable
fern-rx888 0.1.0 with libusb 1.0.30
loading the built-in firmware into the FX3 at USB port 1-4
the RX-888 at USB port 1-4 did not come back with its firmware running within 6 seconds. Unplug it and plug it in again; if this repeats, try another USB 3 port or cable
fern-rx888 0.1.0 with libusb 1.0.30
loading the built-in firmware into the FX3 at USB port 2-4
the RX-888 at USB port 2-4 did not come back to its bootloader within 6 seconds. Unplug it and plug it in again; if this repeats, try another USB 3 port or cable
fern-rx888 0.1.0 with libusb 1.0.30
loading the built-in firmware into the FX3 at USB port 1-4
the RX-888 at USB port 1-4 did not come back with its firmware running within 6 seconds. Unplug it and plug it in again; if this repeats, try another USB 3 port or cable
fern-rx888 0.1.0 with libusb 1.0.30
loading the built-in firmware into the FX3 at USB port 2-4
the RX-888 at USB port 2-4 did not come back to its bootloader within 6 seconds. Unplug it and plug it in again; if this repeats, try another USB 3 port or cable
fern-rx888 0.1.0 with libusb 1.0.30
loading the built-in firmware into the FX3 at USB port 1-4
the RX-888 at USB port 1-4 did not come back with its firmware running within 6 seconds. Unplug it and plug it in again; if this repeats, try another USB 3 port or cable
fern-rx888 0.1.0 with libusb 1.0.30
loading the built-in firmware into the FX3 at USB port 2-4

I know it's working as it's my testing system. Looks to me the module doesn't detect it properly.

if you tried to implement a background image its not showing up. is this size restricted?
admin config admin#/config is not changing if you change settings in the admin system.
ft8 decoder works fine.. its running on 6 meter now..
update went smooth to 0.1.1  poppup update message is working...
what would be nice is a way to add bookmarks customise the Waterfall colours in admin.. now its only 4 to choose from.
for the rest still looking good.

so far so good.. i keep working a wee bit with the colours though and see how it goes from there.. tnx