42.0°E Türksat 5B

Leider fand ich nur ITU-Dokumente, wo es um 31°E ging.

Hier war die Rede von einen Frequenzbereich von 14.000 - 14.500 GHz.

Um künftige DRO-Fehler auszuschliessen, habe ich schon mal nach einen PLL-LNB angefragt.

Auf satdx.club gab es einst Einträge zum High-Ku-band, welche inzwischen komplett verschwunden sind.

Die auch heute wieder aufgetretenen Ungereimtheiten veröffentliche ich besser im IQMonitor.Bereich, dort passt es einfach besser.

Unfortunately, I only found ITU documents dealing with 31°E.

There was talking about a frequency range of 14,000 - 14,500 GHz.

In order to rule out future DRO errors, I have already asked for a PLL-LNB.

There used to be entries on satdx.club about the High-Ku-band, which have now completely disappeared.

I'd better publish the inconsistencies that reappeared today in the IQMonitor area, it just fits better there.

Quote from s-band

I meant that if you look at what I think is the image, 11180H, using a standard LNB, and you see Inv is "on" for 11180H then it is likely that it actually is the image of the one you see on 14422. It's unlikely that there really is a signal there as that is not within the Turksat band.

Good question It may have something to do with the ratio of the 11180 signal at the image to the noise from the front end at the wanted frequency (14422). That noise should be quite high and may mask a lot of things. I note that 14422 is at a point where the overall noise is low which might be expected as it is at the top of the LNBs's range. If you look above 14422, do you see anything that matches the lower frequencies (below 11180)?

femi

I would like to ask you to re-register the horizontal polarization spectrum with the following parameters:

Fstop = 14650

Fmax = 14650

In addition to transponder 14422 H 29750 5/6 , you will find transponder 14505 H 30000 5/6 (the left slope of which I see on your spectrum left to 14500 MHz), then transponders 14548 H 8000 3/4 and 14589 H 30000 2/3 8PSK.

It is possible that these transponders will have to be locked manually, but this will not be difficult, because. transponder peaks on the spectrum you will clearly see.

Good luck and health!

Echt verrückt.

Manchmal verläuft das Spektrum relativ konstant und dann wieder mit steigender Frequenz nach unten.

really crazy

Sometimes the spectrum runs relatively constant and then again with increasing frequency downwards.

действительно сумасшедший

Иногда спектр работает относительно постоянно, а затем снова с увеличением частоты вниз.

Here is my VERTICAL SCAN on 1.2m KATHREIN CAS 120.

Nothing visible here...

SRmin = 30 kS/s :

As you can see, the constellation has become very clear, and SNR = 12.3 dB! SR = 92 kS/s, and at the corresponding frequency of the first harmonic

11452 MHz such a powerful signal is not observed

Quote from strannik

SRmin = 30 kS/s :

As you can see, the constellation has become very clear, and SNR = 12.3 dB! SR = 92 kS/s, and at the corresponding frequency of the first harmonic

11452 MHz such a powerful signal is not observed

I'm not sure what that can be. Is it a terrestrial link?

Today jaes (SatsUK) found colour bars on 13497H 13330ks/s. I can only just lock this on a 1.8m dish. There is also a carrier on 13526.00073MHz horizontal.

I can't explain, but nothing from my QTH...

I have a spike on 13572 H close to 42E but nothing else

(it is in H)

SNR=12.6 >> SNR=6.5dB

SR 80kS/s < SR 84 kS/s

Rmax=68 > Rmax=57

FER=0.024<<FER=0.068

13156960kHz - true frequency of 8PSK signal of DVB-S2X standard ?

11452000kHz - frequency which is accepted on the third subharmonic of the heterodyne of the outer ring of the signal as QPSK of DVB-S2 standard.

For this "pseudosignal" the inner ring of symbols with MER commensurate with the outer ring is perceived as interference and reduces the effective SNR by two times, i.e. by 6dB ---> 12.6 - 6 = 6.6 ~ 6.5dB

Today's observations are not impressive, but rather simply confirm the previous experiment:

Das erste Mal auf 42°E ein Signal mit einem Pegel, der auch dem "West new Ku" entspricht und horizontal auf 13525,50 am deutlichsten hervor kommt.

The first time at 42°E a signal with a level that also corresponds to the "West new Ku" and is most clearly visible horizontally at 13525.50.

Excellent result! I would say more good and kind words if I could see the registration parameters in the main program window, as I did in my previous post.

Now I can advise you to check and, if I have interpreted the horizontal and vertical spectra correctly, adjust the LNB rotation around the axis:

- set the current frequency F=13505000kHz, and polarization H;

- turn on the dynamic spectrum Dynamical and adjust the vertical scale so that there is a reserve of ~2dB at the top and bottom;

- stretch the spectrum window as much as possible vertically to ensure maximum adjustment accuracy;

- turn on the V checkbox on the dynamic spectrum, then stop and close the dynamic spectrum. Immediately click Dynamical again - its window will open again, but in addition to the H spectrum, there will be a more inertial auxiliary spectrum V;

- make and save the original spectra (before adjustment);

- proceed with the alignment. If the computer screen is not visible from the focal point of the antenna - two smartphones and a video stream will help you (to avoid interruptions, press Start 100 many times);

- now slowly rotate the LNB around the axis so that the SNR (H) is maximum with minimum SNR (V), and the spectral pattern is as different as possible. Save this spectrum;

- without changing the angle of rotation of the LNB, try to slowly move the LNB to the side and away from the antenna mirror. Having reached the optimum for H and V, take a picture of the dynamic spectra. Keep in mind that this setting is frequency-dependent (see the article);

- now try (without fanaticism) to move the converter holder with your hand to the left and right (checking the correctness of the antenna adjustment to the satellite by azimuth), and then up and down (checking the correctness of the antenna elevation angle). If necessary, adjust the antenna.

Good luck to you, we are waiting for pictures of the dynamic spectra of your antenna

settings

Sofern es morgen möglich ist, andernfalls erst zum kommenden Wochenende, versuche ich die Drehung des LNB mit dem Laptop im Garten.
Einen Tisch finde ich leichter, zwei Smartphones nie.
Ich muss zwar einen USB-Tuner verwenden, hoffe aber, dass es damit auch funktioniert.

Die Antenne selbst MUSS ich JEDES Mal optimieren, schon auf Grund der Instabilität des Laminas Polarmount.
Ich kann dies vorab im ext. Ku-band versuchen, normalerweise nehme ich dazu einen Eastbeam-Transponder auf 42°E

Das LNB befindet sich am Maximum von der Antenne entfernt. Zur Antenne ist ein verschieben möglich, weg nicht.
Die seitliche Drehung läßt sich mittels Laser kontrollieren.

If it's possible tomorrow, otherwise not until next weekend, I'll try rotating the LNB with the laptop in the garden.
I find a table easier, two smartphones never.
I have to use a USB tuner, but I hope it works with that too.

I HAVE to optimize the antenna itself EVERY time, simply because of the instability of the Laminas Polarmount.
I can do this in advance in ext. Try Ku-band, I usually use an Eastbeam transponder at 42°E

The LNB is at the maximum distance from the antenna. It is possible to move it towards the antenna, but not away.
The lateral rotation can be controlled using a laser.

Position angefahren und optimiert

LNB ausgewählt und Brennpunkt kontrolliert. Dieser lag in der Mitte der 4 Befestigungsschrauben der Antenne (Laserpunkt grün).
Der Sollwert liegt zwischen der Mitte und den unteren Schrauben (roter Punkt).
Allerdings wie sich herausstellte, hatte das Drücken des Feeds nach unten keine Auswirkung bei dynamical gezeigt.

Leichtes Drehen des LNBs brachte nur einen geringeren Pegel.
Das verwendete LNB ist Sinle-Polar, hat keine Polaritäts-Umschaltung!

13497 H wurde automatisch gefunden und ist ein weiterer Erfolg, auch wenn das Level nicht gerade einen Westbeam gleicht.
Ich schreibe dies dem sehr kurzen Kabel (~2 m) zum Tuner zu, gegenüber zur stationären Anlage mit ca. 30 m und noch ein Diseqc-Schalter dazwischen.

Position approached and optimized

LNB selected and focus checked. This was in the middle of the 4 antenna fastening screws (green laser point).
The target value is between the middle and the lower screws (red dot).
However, as it turns out, pushing the feed down had no effect on dynamical.

Turning the LNB slightly resulted in a lower level.
The LNB used is sinle-polar, has no polarity switching!

13497 H was found automatically and is another success, even if the level isn't exactly like a Westbeam.
I attribute this to the very short cable (~2 m) to the tuner, compared to the stationary system with approx. 30 m and a Diseqc switch in between.

Nachtrag:
Um den Brennpunkt permanent zu optimieren, muss die Motoraufhängung des LNB-Wechslers gefräst werden, um die Neigung verstellbar zu machen.
Addendum:
In order to permanently optimize the focal point, the motor mount of the LNB changer must be milled to make the inclination adjustable.

femi

Many thanks for the great, painstaking, and, most importantly, very productive work!

Due to the inadequacy of the translation, there is confusion between a unipolar LNB and an LNB with one polarization (as a rule, the vector of a linearly polarized signal is perpendicular to the wide side of a rectangular waveguide). But if H (horizontal) polarization is enabled in IQmonitor, the LNB is supplied with a supply voltage of 18V, and V (vertical) polarization corresponds to a supply of 13V, which leads to a decrease in the transmission coefficient and some deterioration in the frequency response.

Therefore, two similar, but not identical curves are observed on the dynamic spectra, which show changes in C/No.

In the upper left corner, the instantaneous C/No value for 18V supply is shown, and below, in gray numbers, the C/No strongly averaged over the ring stack is shown. This real-time statistical processing allows to increase the accuracy of C/No measurement to 0.01dB compared to 0.2 dB at the ADC output. The instantaneous C/No value for 13V power supply is shown in the upper right corner.

The first dynamic spectrum was recorded at 09-49-36 and, according to the agreement, should correspond to the LNB position before the adjustment. It shows 9.7dB H (on average 9.93dB) and 10.9dB V.

The last dynamic spectrum was recorded at 09-56-56 and, according to the agreement, should correspond to the LNB position after the adjustment. It shows 12.5dB H - 2.8dB more (on average 11.93dB - 2dB more) and 11.4dB V - 0.5dB more.

Now let's compare the SNR on the feed reports after and before the adjustment:

17.4 - 16.6 = 0.8dB (H)

11.9 - 8.6 = 3.3 dB (V) On average, the SNR increased by 2.1dB, which corresponds well with the improvement of the average C/No by 2dB.

PS For TBS 5927, 6903, 6908 and 6983 cards, you need to enable the TBS-6983 checkbox, but do not enable the S2X checkbox!

13497H still there but in and out of lock as clouds pass by.

The mid-transponder beacon has the 2, closely spaced frequencies similar to 5A but the vertical one is at a much lower level in this case.

The transponder bandwidth can be clearly seen on V & H. However, I can find no evidence of any other signals, from near London, and the method used here is quite sensitive.

1.8m PF 2dB NF LNB

femi What is your ext Ku LNB model number and LO frequency?

You can see it in the settings of my last post. Its single polarity like Norsat's, SMW's.

Zu XMW aktuell:
Vor 2 .. 3 Wochen sendete ich eine Anfrage an XMW bezüglich Ersatz meines defekten K-Band LNB, komplett detailiert, sowie die Höhe der Versandkosten.
Die Antwort war enttäuschend und verstörend, ein Link zu den LNB-Typen und wieviele ich will.
Von Lesen meiner Anfrage keine Spur.

About XMW currently:
2 .. 3 weeks ago I sent a request to XMW regarding the replacement of my defective K-Band LNB, completely detailed, as well as the amount of shipping costs.
The answer was disappointing and disturbing, a link to the LNB types and how many I want.
No sign of my request being read.

Quote from s-band

Today jaes (SatsUK) found colour bars on 13497H 13330ks/s. I can only just lock this on a 1.8m dish. There is also a carrier on 13526.00073MHz horizontal.

Nothing from 13497 H 13330 on 1.2m from my place - only carreir on 13526 H is visible here...

/edit: Sorry guys... it´s my vertical spectrum here!

Quote from qwer

Nothing from 13497 H 13330 on 1.2m from my place - only carreir on 13526 H is visible here...
...

What lnb did you use for this extension?
Thanks

satesco

I use the right one from this picture, see in this toppic here before: RE: 42.0°E Türksat 5B