Posts by DD4YR

Quote from PE2BEN

So, i have to choose between this 2 tcxo LNB's

Hi,

as already asked, it is important what you intend to receive and what the further receiver chain will look like.

On the one hand, the frequency stability of the LNB depends on the operating mode, and on the other hand, the IF. If a standard RX follows, an IF on 435 MHz may make sense. If strong mobile radio signals are present in the LTE range, an IF around 735 MHz (25 MHz TCXO) can be disturbed.

I see the antenna is 1.8m, so I guess DATV is also an option?

Then an LNB with simultaneous horizontal and vertical output would be good.

Without more precise information, an LNB cannot be recommended.

73 de Robert, DD4YR

Quote from DL3ED

man kann auch den LMP 92066 über dem I2C Bus umprogrammieren, dann braucht man nicht Löten.

ja sehr schön, und wie geht das?

73 de Robert

RF-A and RF-B at the same time works ....

on RF-A 1,8m dish, on RF-B 1,5m dish, two different coax lines ...

73 de Robert

Hallo Ulrich,

bin mir nicht sicher was Dein Anliegen ist.

Der MiniTiouner Pro V2 läuft mit der Software vom Tom.

73 de Robert

Quote from F1EJP

First QSO Duplex DAVT on QO100 between F1EJP and ON1RC in H266 VVC encoding with DATV-Easy 2.17 Beta

Congrats!

Some info about latency and CPU / GPU load ?

73 de Robert

Quote from dl2kp

Now I am not shure to install the newest firmware V.0.35 because I would like to install the french software for MiniTiouner, too. Which version of firmware is recommended? Who has experience with this softwareß

Schau mal da:

Post

RE: Probleme mit dem Pluto Firmware-Update

Bitte gehe mal https://www.f5uii.net/en/patch-plutodvb/

Und vergist die neueste Analog Devices FW v0.35


DVB support ist nur bis 0.32...


benno

PA3FBX

Feb 22nd 2023

73 de Robert, DD4YR

Hello MIkko,

thank you for adding the values.

I am not the antenna specialist, but an axial ration of 3dB is rather bad?

Shouldn't a circular polarized antenna ideally have 0dB?

73 de Robert

Hello Mikko,

this would be great and helpful.

Based on the plotted graphic, I can only roughly estimate the angle, somewhat inaccurately.

Thank you

Hello Miko, very interesting your measurements.

Can you make a readout of the -10dB angles? For iluminating of a dish it would be better to see the -10 dB values than -3 dB for compare....

tnx.

73 de Robert

gm Pierre,

The resolution of the photo is not good. What type of LDMOS is installed there?

73 Robert

73 de Robert

Quote from AB6RF

That sounds like it could be a problem.

Yes, in the worst case this transforms from linear to circular with a loss of 3dB

I prefer to use as less as possible dielectrical material in the radiation pattern.

There is loss enough by the copper tube, need not more....

73 de Robert

Yes, I understand.

In my experiments I used warm rolled copper tube from model making. The tube is softer and stays in the shape as you bend it.

The support structure will have little effect on 2.4 GHz. On 10.5 GHz, however, depending on the phase position, it will have an extreme effect, since the signal must enter the dielectric and exit it again, experiencing refraction twice. And that on each side.

You may be able to rotate the support construction so that the lowest attenuation errors occur with the polarization used (H or V).

You can also try this with TV-Sat at home.

Quote from AB6RF

and when I come to Europe, I'll test which one works better and use that.

... You don't need to wait for your trip to the EU, you can see and measure the attenuation on 3cm by the helix on every TV satellite. .... and optimize if necessary.

73

I think the goal of Dominique was that all settings are taken over "on the fly" by the PLUTO. An "apply" or save settings in the flash memory of the PLUTO is not good, because this always leads to malfunctions.

But maybe Dominique himself can explain us how the process should be?

73 de Robert

Quote from PA3FBX

The PTT button is a separate relay output capabel to just switch the final stage..

Not only, The PTT button switches also the PTT options in the F5OEO soft ...

Quote from DJ0VL

I've written a tiny tool for the programming of those LMP92066

You can describe how you did it.... ?

73 de Robert

Quote from VE4SW

Zusätzlich habe ich AMSAT-DL unterstützt und das war eben auch wichtig

Danke, dass Du das nochmal erwähnt hast. Das übersehen viele ....

Quote from SV1BDS

How it can be explained, if I got it, that rolloff displayed is 0.2 and setting is 0.25?

who says the setting is 0,25 ?

Not mandatory. The TS can transmit a value which is not necessarily used by the roll off filter in the DVB-S2 encoder.

At least this is the case in the MiniTioune software in combination with F5OEO firmware.

With the hardare solution used in DOHA, you can assume that the rolloff value supplied in the TS is also used in the DVB-S2 encoder.

73 de Robert