Explanations Tutioune version 1.0

Messagede F6DZP » Mer 2 Nov 2011 06:34

from New version 1.0 software is all in One.

tutioune web.jpg
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you can now see directly video, measures(RFpower, constellations...),and analyze inside same software

TV Button is the button that allow to switch between Setup Mode and Video mode

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In all modes you keep always the Measure Panel

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In setup mode you have the Tuner Command panel - the setup panel _ the Decoding Command panel

Tuner commands :

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You will see on these buttons the values you have written in the Tutioune.ini file.
This allow you to setup you preferred presets.
To lock on a DVB-S station begin to click firstly SYMBOLRATE and after click FREQUENCY.
Normally you have just do do that to get a DVB station.
GO! is just for repeating all setup to STB0899.
Reinit is to be use when you have change too much parameters ans are lost, or when any problem appear.
It will rewrite all standards parameters in the STB0899 registers but SymbolRate and Frequency.
Reset is for my own debuging purpose for moment...

You can also set a voltage if necessary for your preamplifier (or LNB)
You can also set the FEC
Remember that STB0899 always works in auto detect FEC mode, but with these 6 little checkboxes you call tell him which FEC searching.
You can set on all 6 checkboxes, STB0899 will find the good FEC value between all of them, but if you set on only one or two checkboxes, STB0899 will find more quickly.

You can set LNB voltage and if you choose 13v or 18v you can add 22khz to switch LNB to upper Band

decoding commands:

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When TS Status is green( Measure Panel), you can ask for Ts decoding.
PID from TS
will try to find all Pids of all data in the stream.
If it can, it will write all Station Names automatically on different buttons ( max 10)
You will also see the Provider Name
If station Name is a CallSign with @Locator, Webmonitor will be able to compute automatically the distance between your station and the station you receive

PID from.ini
will read Pids from your tutioune.ini file

You can also directly write by yourself Pid values in EDit zones.

Format
if autoformatis checked then Format will be automatically recognize ( if station send its format) and pictures are resized.
if autoformat is no checked you can change by yourself format you want.

Graph
if led is red your computer has not be able to create Directshow Decoding Graph
You can verify which graph has been created by looking at newvideo.grf file ( with graphEdit)

Station and infos
you write station name and different informations to be send to your Web Monitor

Button Photo
Whit this button you can start pictures capture from video
Timing Capture between each snap can be set from 1sec to 10 sec

Button XMLSAve
XML messages are save in a file for checking.

Button Web
your pictures are sent to your TiouneMonitor on Vivadatv Forum

Button JPGsave
last picture is saved on hard disk

Button UDP
stream is sent to an UDP IP (set by tutioune.ini)
so you can see video using VLC (vlc.exe "udp://@230.0.0.1:1234")
so you can analyze in real time received stream using tools like TSreader...

Record
press once to record complete stream in a .TS file
you can use in with VLC to look at video
you can use it with your modulator software like StreamXpress
press once again to stop recording.

Button TV
TV Button is the button that allow to switch between Setup Mode and Video mode



SETUP panel


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bandwidth and preamplification

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The Tuner reference name will be automatically detected (STB6100 or STB8260)
for the STB6100 you can setup Gain and Bandwidth.
Before detected a signal don't set the Gain in Auto mode.
The auto Gain mode can be set after a frequency locked to obtain a better MER which is the best when AGC1 is about 100U.
the aim of AUto gain is to search the "near 100U" position.

Frequency

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Here you can write frequency you wish to receive. Just type the digit in the rectangle.
If value is in a RED rectangle, the Tuner has not been well programmed, try again.
Most of time the rectangle is green, the frequency is well programmed.
You will see just under the real frequency programmed in the tuner STB6100( frequency set). This frequency depends of quartz oscillator and step possibilities.
But the Transmitter frequency is often not the same you asked, so there is a digital corrector system called DEROTATOR that will search the deviation with the frequency found. For the moment the Derotator can find a frequency +/- 450 khz around the programmed frequency.

With some DVB cards I succeed to catch a frequency up to + or – several megahertz around the programmed frequency.
I suppose that, when I will know more STB0899 secrets, I will be able do enhance this possibility.

So, the Derotator can find the deviation or Offset with the true frequency to decode.
The Offset detection system will do that. It is set ON when you write a new frequency to get, and go automatically to OFF when it has found the deviation.
There are also 3 algorithms possible for the Derotator phase detection. For QPSK the best is to use firstly algorithm #1 and only after lock we can use algorithm #2 if the MER is low ( below 6dB) to help in phase stability.

Frequency and Symbol Rate synchronization are made by a double PLL (Costas Loop) .
We can see the PLL parameters (alpha, beta, Natural frequency and Damping Factor). For specialist. Take care changing alpha,beta parameters. Normally you don’t need to change the PLL parameters. I have put them just to study them and test the best values.

The PLL must be well locked for good demodulation possibilities. The Vu-meter and Carrier Led in the Measuring Panel show how you are locked. The needle must be in the green zone.
The Threshold is not very important, it is just the value the vu-meter need to reach for the Carrier LED to go green.

The Cycle button is for starting a timer that reset the Derotator every 2 seconds when there is no signal demodulated (led TS STATUS red). It's very useful when you want to let you Tutioune scanning a frequency during hours and specifically if you use the web monitoring option. A friend can see on the Web that your Tutioune is waiting on a frequency for a signal to come and can try to send something or test his equipment, even if you are sleeping or not there...
I use this system sometimes just to be given notice that a friend is transmitting.

SymbolRate

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Write Symbol Rate in KSymbols. There is a little error percentage allowed, it written just under the SR set, you see offset max allowed.
Under, you can see the offset found, and so, the Symbol Rate worked after offset correction.

This is the second PLL loop linked with the frequency PLL loop, so the locking of the system depends of the 2 values. You cannot be very well locked in frequency if your have not put a good Symbol rate that can be locked too.

The Timing Vu-meter and Led in the measuring Panel show how you are locked. The needle must be in the green zone.

As for the frequency PLL, you can change the alpha and beta parameters of the PLL and look at alpha and
If you don't know the Symbol rate you can try to find it with SR search:

SRunknown.jpg
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You need to use this only if you don’t know the Symbol Rate of the station you want to receive. Just to change the search mode ( stop by default) to Auto.
You play with it if you want , a friend send you a DVB-S transmission and you don’t know the symbol rate… fun to play…
You can look at AGC panels

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AGC tuner send directly AGC voltage (0-2V if +3dB on) to the tuner STB6100 gain stage. Nothing difficult to understand I think for Ham Radio.
You can change the compensation speed and the reference.

I write the action in dB and also the value in Units (94U for this example)
The STB0899 give best MER when AGC1 is about 100 units.
( the Auto gain option- for the tuner- search by himself the best value)
The range of action for this AGC is about 70 dB.
and equalizer

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The AGC2 act on IQ digital signal inside the demodulator, just after the Nyquist Filter
If you change the reference you will see directly the constellations being +/- concentrated and going towards or far from zero. This change the MER reading, but MER calibration is accurate only for default values. If you change them, MER values are no more accurate.
I use this AGC2 value to compute RF signal value for lowest values , when AGC1 don’t move or is below 40U.

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The equalizer is a system for attenuation of echoes in coaxial cable.
You can change speed.
There are also 3 reset options, depending of what can arrive to your signal.
F6DZP
 
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Inscription: 24 Déc 2010

Re: Explanations Tutioune version 1.0

Messagede dh6bb » Dim 18 Déc 2011 18:42

Hello,
nice software. Is it possible to add diseqc in the next version?
73 de DH6BB
Jens
dh6bb
 
Messages: 1
Inscription: 16 Juil 2011

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