Posts by DD4YR
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Hello Mikko,
this would be great and helpful.
Based on the plotted graphic, I can only roughly estimate the angle, somewhat inaccurately.
Thank you
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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
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gm Pierre,
The resolution of the photo is not good. What type of LDMOS is installed there?
73 Robert
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73 de Robert
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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
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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.
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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
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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
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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 ...
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I've written a tiny tool for the programming of those LMP92066
You can describe how you did it.... ?
73 de Robert
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Zusätzlich habe ich AMSAT-DL unterstützt und das war eben auch wichtig
Danke, dass Du das nochmal erwähnt hast. Das übersehen viele ....
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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 ?
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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
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Hello,
not sure, because the Minitioune soft read out the rolloff value which is transmitted with the TS. Did not really measure the rolloff.
73 de Robert
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Hi George,
from what do you conclude that the rolloff should / could have changed ?
73 de Robert
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For example the F5OEO Firmware 1602
the PLUTO output pwr makes a jump from about 5 dB between SR500 and SR510
PLUTO v32 pluto.frm 1602 (F5OEO) VV class A/B 1W SR PLUTO slider VV output 25 -4 dB 10mW 53 -4 dB 15mW 66 -4 dB 23mW 125 -4 dB 23mW 250 -4 dB 24mW 500 -4 dB 24mW 510 -4 dB 85mW 1000 -4 dB 85mW 1500 -4 dB 90mW 2000 -4 dB 90mW 2500 -4 dB 90mW -
Hello all,
you must specify the F5OEO firmware version and the SR used!
Different filters are used depending on the firmware version and symbol rate, so the performance (for DATV) can be up to 15dB different!!!!
73 de Robert, DD4YR
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Roberto, what version of Evaristes firmware is recommended?
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Hallo zusammen,
vielleicht ein kleiner Tipp:
Die MiniTioune Software krallt sich immer einen kompletten Kern aus den CPU Kernels. Will man jetzt mehrere Anwendungen gleichzeitig laufen lassen, dann macht es Sinn eine CPU mit möglichst vielen Kernen zu verwenden. Geschwindigkeit ist sekundär.
In meinem Fall läuft Minitioune im Kern 11. In Summe ist dadurch die CPU wenig ausgelastet, und ich bin somit in der Lage mit 12 Kernels OBS, ffmpeg, usw. bis hin zur SDR-Console alles gleichzeitig laufen zu lassen und hab nur 60% CPU Auslastung in Summe.
Schaut euch mal die aktuelle Auslastung eurer Kernels an, mit und ohne MiniTioune ....
Übrigens, es läuft auch MiniTioune noch problemlos mit 0,9 GHz Taktfrequenz .....
73 de Robert
