Author Topic: Eshail2 QO-100 Satellite reseption Details  (Read 2878 times)

Anton Janovsky (ZR6AIC)

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Eshail2 QO-100 Satellite reseption Details
« on: March 05, 2019, 09:43:42 am »
Here is a diagram of multiple configurationns for the Es'hail Satellite.

All the equipment in this diagram is available from Giga Technology http://www.giga.co.za
More Details on the Satellite is also available here http://zr6aic.blogspot.com/search/label/P4A
Power Injectors
Power Injectors is available from Giga Technology.
A satellite dish is just a parabolic reflector, the real antenna is inside the Low Noise Block downconverter (LNB).

Satellite TV is transmitted in the Ku Band (at least in Europe, in some other parts of the world C band is used instead). More precisely the typical range of frequancy is 10.70 to 12.75 Ghz, frequencies far too high to travel inside a coax cable from an antenna to the receiver. The LNB, installed in the focus of the dish, converts the received signals in the 950-2050 range (using a local oscillator).

Universal LNBs need to receive power from the coax cable. The voltage sent to the LNB can be 13V for vertical polarization) or 18V (for horizontal polarization). Universal LNBs also have two different frequencies for the internal oscillator: 9.75 GHz or 10.60 GHz. A 22khz tone must be sent with the power to enable the higher frequency of the local oscillator.

I have a HackRF and qspectrumanalyzer is a very nice tool, but it is useless to directly plug HackRF to your LNB: without the power supply your NB is simply turned off.

The LNB power supply is able to provide 13 or 18v with or without the 22khz tone and is powered from a USB socket. This makes it very handy, a power bank for portable phones can be used as a battery. This circuit could be used with a Satellite Finder (also known as satellite meter, one of those boxes with an analog or digital meter and a buzzer). Using the circuit presented in this page it is possible to go on the roof carrying this circuit a power bank and the sat-finder and nothing else. No need to carry a sat-receiver or to go back and forth to change channel on the receiver to test different bands or polarization.

Reception Blockchain
                                                          ^>>>Power supply 14 and 18V DC
Dish antenna >>>(10.7Ghz) LNB >>> (739.745Mhz)Power injector >>> SDR >>> Laptop

Transmitter Blockchain

Laptop >>> SDR(hackrf/LimeSDR/ADALM-pluto)>>>2.4Ghz>>>(0-5dbm)1stAMP(10dbm)>>> 2ndAmp(+30dbm)>>>2.4Ghz(grid Antenna

LNB
This LNB is avalable from Giga Technology

« Last Edit: March 05, 2019, 10:04:09 am by Anton Janovsky (ZR6AIC) »