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g0orx / linhpsdr

Linux HPSDR
GNU General Public License v3.0
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Radioberry testing of beta 4-23-19 #32

Closed imoldovavan closed 5 years ago

imoldovavan commented 5 years ago

Here is the video of testing the latest beta on my majaro system. https://youtu.be/St0QobSouHA The gain seems too high. On the windows machine running powersdr mrx everything works good and I don't see any of those peaks that look like AM stations bleeding over from the broadcast band. Let me know if I you want me to perform other tests. Thank you, Ion KC8CDQ

g0orx commented 5 years ago

OK, I will have to wait to test with a real Hermes Lite 2 rather than the RadioBerry. With the RadioBerry the display looks like this monitoring 14.074 FT8. I will try to get access to a Hermes Lite 2 in the next few days.

hermeslite2

g0orx commented 5 years ago

FYI - this is what I have been working mostly on recently. QO-100 (Es'hail 2) support with RTLSDR and LimeSDR.

qo-100

imoldovavan commented 5 years ago

Hi John. I have been playing with the rb and found a sweet spot on the gain value. I have another video showing the efect the gain value has on the receive. https://youtu.be/Sd4kCAkCg58 Jumping from 19 to 20 wipes out the receive. Going down in value the "AM" peaks start to show up. Not sure if this is normal behavior, but I hope this helps in some way. Thank you.

g0orx commented 5 years ago

I have contacted Johan as it looks like there may be a bug with the Radioberry code implementing the LNA gain settings when the firmware/gateware version is >=4.0. I noticed that in hermeslite.c it is only taking the low 5 bits for the attenuation rather than the 6 bits. It seems we have 2 separate problems one using the Radioberry hardware and one using the Hermes Lite 2 hardware.

I will be testing with both later today.

-- John

g0orx commented 5 years ago

I have changed the code to check for greater than 4.0 firmware version. Radioberry currently returns 4.0 but only handles the old way of setting the LNA gain.

imoldovavan commented 5 years ago

I believe the receive was cleaner before. I can see the "AM" peaks now, and I can't make them go away. https://youtu.be/qGGnbg138oE

g0orx commented 5 years ago

I can see that the gian level is moving up and down evenly on your video.  I just suspect you have too much gain from the antenna. Do you have any filtering between the antenna and the Radioberry?

-- John

On 26/04/2019 03:13, imoldovavan wrote:

I believe the receive was cleaner before. I can see the "AM" peaks now, and I can't make them go away. https://youtu.be/qGGnbg138oE

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imoldovavan commented 5 years ago

The 'AM' peaks are not visible on the windows machine running PowerSDR MRx and the "Hermes Step Attenuator" setting at 12. I will try to do a video side by side.

g0orx commented 5 years ago

I will check if there is another gain setting that is enabled on it. I have no problems with mine so may be hard to debug.

-- John

On Fri, 26 Apr 2019, 13:05 imoldovavan, notifications@github.com wrote:

The 'AM' peaks are not visible on the windows machine running PowerSDR MRx and the "Hermes Step Attenuator" setting at 12. I will try to do a video side by side.

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imoldovavan commented 5 years ago

This is more prevalent on 40 and 80 meters bands, towards the end of the day when the AM stations start booming in.

imoldovavan commented 5 years ago

Here are two videos recorded within 5 minutes of each other showin the 40 meters band on linhpsdr and powersdr Mrx. there is no trace of "am" signals on the powersdr mrx program. https://youtu.be/jOJDvnNxOJk https://youtu.be/pRUbvFGXxD0 Hope this helps. Thank you, Ion KC8CDQ

g0orx commented 5 years ago

Is this with the latest update I pushed yesterday?

-- John

On Sat, 27 Apr 2019, 02:10 imoldovavan, notifications@github.com wrote:

Here are two videos recorded within 5 minutes of each other showin the 40 meters band on linhpsdr and powersdr Mrx. there is no trace of "am" signals on the powersdr mrx program. https://youtu.be/jOJDvnNxOJk https://youtu.be/pRUbvFGXxD0 Hope this helps. Thank you, Ion KC8CDQ

— You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub https://github.com/g0orx/linhpsdr/issues/32#issuecomment-487242115, or mute the thread https://github.com/notifications/unsubscribe-auth/AAJEH5N26OQFWFPPFNXNHQLPSORWPANCNFSM4HH7NVWA .

g0orx commented 5 years ago

I can see it is not with the latest push. Can you try that version. You may need to delete the props file for the radio in ~/. local/share/linhpsdr.

-- John

On Sat, 27 Apr 2019, 07:52 John Melton, john.d.melton@googlemail.com wrote:

Is this with the latest update I pushed yesterday?

-- John

On Sat, 27 Apr 2019, 02:10 imoldovavan, notifications@github.com wrote:

Here are two videos recorded within 5 minutes of each other showin the 40 meters band on linhpsdr and powersdr Mrx. there is no trace of "am" signals on the powersdr mrx program. https://youtu.be/jOJDvnNxOJk https://youtu.be/pRUbvFGXxD0 Hope this helps. Thank you, Ion KC8CDQ

— You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub https://github.com/g0orx/linhpsdr/issues/32#issuecomment-487242115, or mute the thread https://github.com/notifications/unsubscribe-auth/AAJEH5N26OQFWFPPFNXNHQLPSORWPANCNFSM4HH7NVWA .

imoldovavan commented 5 years ago

Hi John, I deleted the two props files, before firing up the program. I believe it need more attenuation. It behaves the same. The "AM" peaks are still visible. I also checked the bands with the Powersdr mrx and it works OK with that one. Here is the video. https://youtu.be/vANHeeeVMHA One other observation. If I disable the Hermes Step Attenuation in the Powersdr program the AM spikes start to appear. With that enabled and set at 12 as per Johan instructions it works good.