Help with the settings

[Andy R3MAV]

Can you tell me what needs to be changed in the settings to remove this central signal?



Wow, how do I insert a picture?

[Bas ON5HB]

There are no settings that I know.
Depends on the driver.

If that is a bad freq, use a different centerfreq.

Most of us use the RX888MK2, that has no center-signal.

[Andy R3MAV]

Bas, thanks for the reply. So it's hardware, as I understand it. We plan to use RX888, this is a test version.

[Bas ON5HB]

I had the same problem with all IQ-devices, also during websdr.org software.
You can not avoid a problem in the center of the spectrum.

Real devices like the RX888MK2 only have this at the beginning and end of the spectrum, but not in the center.

When you get an RX888MK2, make sure it's thermal modified or it will be burn and die.

Open it before you use it, look if there is a thermal pad installed at the bottom. Serveral topics here in the forum help you about this.

Do not use an RX888MK2 without thermal mod....IT WILL DIE.

[Andy R3MAV]

Yes, I know that. Our RX888MK2, I modified it and it now works on one of the most popular websdr, according to the version of the websdr.org

[alanVK2ZIW]

I have two SDRs, an RX-888 and a Mirics based "Simple SDR".
Run these under two different users, user1 and user2.

Config for the Mirics MSi3101 chipset board:
config-miri.toml
[server]
port=9073 # Server port
html_root="frontend/dist/" # HTML files to be hosted
otherusers=1 # Send where other users are listening, 0 to disable
threads=2

[websdr]
register_online=true # If the SDR should be registered on https://sdr-list.xyz then put it to true
name="MSi3101, Sydney, Australia" # Name that is shown on https://sdr-list.xyz
antenna="same dipole" # Antenna that is shown on https://sdr-list.xyz
grid_locator="QF56HG" # 4 or 6 length Grid Locatlr shown on https://sdr-list.xyz and for the Distance of FT8 Signals
hostname="http://www.unixservice.com.au" # If you use ddns or something to host with a domain enter it here for https://sdr-list.xyz

[input]
sps=2000000 # Input Sample Rate
fft_size=1048576 # FFT bins
fft_threads=2
brightness_offset=-6 # Waterfall brightness offset. Reduce to negative if you see black regions in the waterfall
frequency=6900000 # Baseband frequency
signal="iq" # real or iq
accelerator="none" # Accelerator: none, cuda, opencl
audio_sps=44100 # Audio Sample Rate
smeter_offset=-10

[input.driver]
name="stdin" # Driver name
format="s16" # Sample format: u8, s8, u16, s16, u32, s32, f32, f64

[input.defaults]
frequency=14165000 # Default frequency to show user
modulation="USB" # Default modulation
---------------------
start-miri.sh
#!/bin/bash
cd /home/alanb/src/ny4q/PhantomSDR-Plus
 [  `pgrep -c  -u $USER miri_sdr` = 1 ] && \
 [  `pgrep -c  -u $USER spectrumserver` = 1 ] && exit 1

## killall -s 9 spectrumserver
## killall -s 9 miri_sdr
pkill -u $USER miri_sdr
pkill -u $USER spectrumserver

##service sdrplay restart
##rm -f /tmp/miri2
##mkfifo /tmp/miri2
##ls -l /tmp/miri2
sleep 2
 miri_sdr -m 252 -f 6900000 -s 2000000 - | ./build/spectrumserver --config config-miri.toml > specMiri 2>&1 &

[Bas ON5HB]

What are you asking?
As many things are wrong.

frequency=6900000 # Baseband frequency

but

frequency=14165000 # Default frequency to show user

then why:

audio_sps=44100 # Audio Sample Rate

other then that, what are you asking?

Sorry mate, but your posts make no sense.