Hello what is this?I also have a steerable
how the co-axial is constructed how diameters play role in AC freqThe highest frequency co-ax can carry depends on it's construction, diameter and whether it has bends in it.
in my DTH Satellite reciver the frequency must be higher than 1GHZ range ..
Ask again when you also have 50 years experience, but by then you would know the answer anyway!how you learn so much?
how you learn so much?.
The signal is down converted at the dish LNB itself: the local osc frequency is sent up the cable (and the power for the LNB) - this also selects the tuning channel. The IF result is received by the same cable back to the set top box.
OK, Coaxial also carries DC at what voltage and current?"LNB" (Low Noise Block converter) and it's purpose is to down-convert the satellite broadcast frequencies so they are low enough that normal co-ax can carry them. The co-ax also carries DC from your set top box up to the LNB to provide it with operating power.
There are also numerous other control signals sent from the set-top box to the LNB to select the antenna polarization and usually to select more than one oscillator frequency. You are normally not aware that these signals are controlling the dish as they are sent automatically as you change channel.
Does LNB has oscillator like micro controller ?
IF
what is IF here?
I can not tell without seeing them. They could be the antennas, one horizontal and one vertical or some kind of signal coupling lines.and there are two pins of 15mm i think at 90 degree what they function?
It varies from one LNB to another but typically, the DC is switched between around 15V to 20V to tell the LNB which polarization to use and there may also be burst of data using 22KHz tones to switch local oscillator frequency. Search for "Disecq" for more information. The current depends on individual LNB designs but is normally around 100mA.OK, Coaxial also carries DC at what voltage and current?
can one wire can carries dc volatge with signal of GHZ with information?
what is the cost of it and how it look?dielectric resonator oscillators" (DRO)
How can we do this will this not result in damage to signal?for example 11GHz from the satellite minus 10GHZ from the DRO produces 1GHz IF.
oand there are two pins of 15mm i think at 90 degree what they function?.
polarization
hello,
which modulation is used in satellite dish?
**broken link removed**
Neither the satellite dish nor the LNB are determining the modulation.which modulation is used in satellite dish?
An experienced engineer can design virtually everything, but not without studying many project details.So after learning lot of things what you can design ?
can you design STB or what?
So after learning lot of things what you can design ?
can you design STB or what?
Is it contain mechanical components??Braking systems for trains in France.
Many automatic telecoms test sets, including all hardware, software and pneumatics.
Read a lot, understand a lot, ask questions as a last resort. See if local schools or colleges run electronics courses you can join.how should i learn?
In that product there were wheel rotation sensors (magnetic reluctance sensors) and inputs from the speed control and braking controls. It calculated the amount of braking power needed and produced a PWM signal to the brake actuators. If the brakes were failing or the speed was too high, it sent an alarm signal to the driver. It was mostly a software product but had some interfacing components to process the input signals and provide the required PWM drive voltages.Is it contain mechanical components??
I worked on the PEDC Project (Pan-European Digital Cellular) which later became GSM , now the digital cell phone system used throughout the world. After that, I designed and built fast automated telephone testers. They were quite big machines that sat at the end of telephone production lines, they automatically checked the function of all the telephone buttons by pressing them with pneumatically driven 'fingers', did line impedance and voltage/current checks, operated all the switches, checked the ringer volume, used video pattern recognition to check LCD displays and LEDs were working and finally did frequency sweep checks to make sure all the audio paths were withing specification. A large office telephone with an LCD display and lots of features would have all it's features tested in about 30 seconds. I don't know how many phones went through the testers but it was more than 10,000 per week.what is it?
I designed and built fast automated telephone testers.
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?