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DarkSky

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Posts: 2,241
Reply with quote  #31 
femon should be installed in my image also. I have majortom's fork of dvb-apps installed. Be fore-warned majortom has some mods in that area where the patch is. I would try it first and see what it does. If you want the src:

hg clone https://bitbucket.org/majortom/dvb-apps

cd dvb-apps
make
sudo make install

It has been erroring out on me due to newer version of libpng on my system if you get this:

Code:

exp-gfx.c:172:22: error: ‘Z_DEFAULT_COMPRESSION’ undeclared (first use in this function)
     D->compression = Z_DEFAULT_COMPRESSION;

In util/alevt/exp-gfx.c look for Z_DEFAULT_COMPRESSION and prepend PNG_ to it;

static int png_open(struct export *e)
{
    D->compression = PNG_Z_DEFAULT_COMPRESSION;
    return 0;
}

Good luck

Ray
area21

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Posts: 76
Reply with quote  #32 
Quote:
Originally Posted by iz5rng


A little off topic, sorry.

Area21, is this the device you have?
If yes we need to share some information for use with linux.

300px-TechniSat_SkyStar_USB_HD.jpg 


Yes, that's it
area21

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Posts: 76
Reply with quote  #33 
@Ray, please check the attached screenshots.
1st : Ubuntu pc + Crazycat tune-s2
2nd: Raspbian Pixel + Crazycat tune-s2
Both attachments are for the same frequency ... do you have any explanation for that?

Attached Images
Click image for larger version - Name: tune-s2-crazycat.jpg, Views: 8, Size: 256.65 KB  Click image for larger version - Name: tune-s2-crazycat-rpi.jpg, Views: 9, Size: 221.97 KB 

DarkSky

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Posts: 2,241
Reply with quote  #34 
Max:

I did some experimenting here with majortom's fork and the stock version in arch's repo femon (linuxtv-dvb-apps). First off you have to tune to the tp like with some program (i used tune-s2). This may be counter productive for your use.

I use femon and femon -H on both versions and came up some different read outs:

First tuned majortom's tune-s2:

tune-s2.png 

Using just femon. First pic is majortom's fork & second pic is stock. The snr on majortom's does not appear to be correct and the signal/snr values in the stock femon are in hex:

mt-femon-cropped.png 

stock-femon.png
 
Using femon -H (Human readout). The first pic is majortom's and second pic is stock femon. In majortom's the snr appears to be looking like what you have been getting in the past in db but the stock femon is showing is showing snr in % which at this point I do not know relatively speaking if it is correct but it looks good.

mt-femon -H.png 

stock-femon-H.png   

Decisions decisions........

Ray

DarkSky

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Posts: 2,241
Reply with quote  #35 
Quote:
Originally Posted by area21
@Ray, please check the attached screenshots.
1st : Ubuntu pc + Crazycat tune-s2
2nd: Raspbian Pixel + Crazycat tune-s2
Both attachments are for the same frequency ... do you have any explanation for that?


I would guess there are some differences in the coding between the different kernels used in the distros. If I remember right you are using the stock raspian pixel image which is @ kernel 4.9 and do not know what your ubuntu kernel is. Raspian kernel tree keeps current with with linus's kernel at that time but adds their patches for the raspberry pi and there is no reason for them to change dvb drivers in their kernel.

I have noticed your skystar uses a different frontend than Max's and I understand yours is a different model also.

Any way I downloaded and tested crazycat's tune-s2 here using my install of UDL's kernel and it worked just fine:

crazycat.png 

area21

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Posts: 76
Reply with quote  #36 
Here is majortom femon results

signal = 56%
snr = 17.4db

Attached Images
Click image for larger version - Name: femon.png, Views: 3, Size: 106.92 KB 

area21

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Posts: 76
Reply with quote  #37 

Thanks for replying Ray,
@iz5rng's screenshot is for an old dvb-s skystar frontend stv0299
So, Majortom femon signal and snr values are displayed correctly .. Is there anyway to have the same values using Crazycat tune-s2?
Although the signal in Ubuntu is displayed in dBm and in % using femon but it's not a problem for me.


DarkSky

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Posts: 2,241
Reply with quote  #38 
That confuses me some when you posted you had what he had above in post #32.

I would check (both of you) with linuxtv.org and make sure you both have the recommended firmware in /lib/firmware for your devices; just to make sure all is good there.

google linuxtv your-dvb-device
area21

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Posts: 76
Reply with quote  #39 
Quote:
Originally Posted by DarkSky
That confuses me some when you posted you had what he had above in post #32.

I would check (both of you) with linuxtv.org and make sure you both have the recommended firmware in /lib/firmware for your devices; just to make sure all is good there.

google linuxtv your-dvb-device


True [smile],
We have the same device in post #32
But he is not using the same device in the screenshots he posted
He is using an old device .. got it?

DarkSky

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Posts: 2,241
Reply with quote  #40 
I understand now.
iz5rng

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Posts: 33
Reply with quote  #41 
Hello, sorry for making some confusion (I am italian so confusion is in our DNA!! ahahahah)

I have two skystar:
The first one is very old (I think about 15 years) and has frontend stv0299. I'd like to use this device to make my dish pointing equipment instead of trow it in the rubbish.
The second one is the same Skystar HD USB using Area21, I use this device with Ubuntu for viewing some live feed...
Thank you all.
Max.
iz5rng

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Posts: 33
Reply with quote  #42 
Area21, do you have an email address? I sent you a private message but maybe you did't read it.
Thank you.
Max.
majortom

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Posts: 4,836
Reply with quote  #43 
massimo,
to implement a relative scale in your tune-s2 arduino project for your older device.
have a look at the dvb-apps utility 'femon' as an example.

https://linuxtv.org/hg/dvb-apps/file/3d43b280298c/util/femon/femon.c

__________________
Perfect 10 7.5' mesh Chapparal C/Ku Co-Rotor feed, Norsat 8115 CBAND, Norsat 4106A Ku Thomson Saginaw Actuator, Vbox positioner,
Home Brew Polarotor683 Servo circuit. Openbox S9, Prof7500, v4l-updatelee linux drivers installed.
area21

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Posts: 76
Reply with quote  #44 
Quote:
Originally Posted by iz5rng
Area21, do you have an email address? I sent you a private message but maybe you did't read it.
Thank you.
Max.

Please check your pm [smile]

@majortom
You tried szap-s2?
https://bitbucket.org/CrazyCat/szap-s2
Signal and snr are displayed as in the attached screenshot.
Can you fix it?

Attached Images
Click image for larger version - Name: szap-s2.png, Views: 5, Size: 109.12 KB 

majortom

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Reply with quote  #45 
No , but you can... I am not a programmer, sorry...
But that is the beauty of Open Source sw in a linux environment...
Come across something you don't like or would like to see differently, you have the opportunity to fix it
yourself and possibly even learn something in the process, what a concept...
Try that with windows, and see how far ya get[smile]



__________________
Perfect 10 7.5' mesh Chapparal C/Ku Co-Rotor feed, Norsat 8115 CBAND, Norsat 4106A Ku Thomson Saginaw Actuator, Vbox positioner,
Home Brew Polarotor683 Servo circuit. Openbox S9, Prof7500, v4l-updatelee linux drivers installed.
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Fellow Members, your posts are welcome here! Do not worry about posting everything perfect. Different receivers and LNB's will give you different Frequencies and Symbol Rates. Some set top boxes, PCI cards and USB receivers, Do Not Require all of the same information that others may need. It is not Required to post everything that others may need to tune in a feed. It is just most important to share the find. We can always adjust the Frequency and Symbol Rates and try the various Modulations and FEC's on our own receivers until we get a lock and then give a polite reply with what works for your receiver, as that information might help others as well. We all appreciate the efforts and energy of the Posters!

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