Questions tagged [satellite]

Circuit design for satellites differs because of the space environment, which includes designating for vacuum, large temperature swings, and radiation tolerance. Satellite circuits should be able to handle latch ups and Single Event Upsets (SEU's) from radiation that ionizes silicon channels and recover from faults.

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Antenna Array - Hundreds of elements forming thousands of beams - How?

How would an antenna array of 100 elements be able to form 5000+ simultaneous beams? Or do I have it wrong, there would only be a maximum 100 beams from the 100 elements at any one time and those ...
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27 views

Troubleshooting NOAA double cross antenna

I've been trying to recive NOAA automatic picture transmission (APT) pictures for a year now. I never got a picture with V-dipole, so I decided to build a double cross antenna. I used 75 ohm coax ...
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2answers
133 views

How do I move a motor to a desired angle using a motor encoder?

So I have this project, the goal is basically to be able to make a motor move to rotate a set of gears and move a panel attached to a hinge to a desired angle. I have a motor encoder attached to the ...
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65 views

How does satellite TV get through in rain?

How does satellite TV get through in rain? I read somewhere that satellites make use of KU band to transmit data, we have heavy rainfall in various times of the year but even during those times TV ...
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1answer
48 views

Satellite array antenna beamforming - basic intuition help

When you see a satellite coverage region on the earth, the array antennas form tens of circles (small coverages) in a large coverage. My question is whether all these small circle coverages exist at ...
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25 views

Does DiSEqC require a DC bias?

The DiSEqC (Di[gital] S[attelite] Eq[uipment] C[ontrol] specification (bus_spec.pdf within https://www.eutelsat.com/files/PDF/DiSEqC-documentation.zip) describes a tone-based serial data bus that can ...
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1answer
57 views

Radiofrequency exposure from portable (vehicle-mounted) satellite uplink antennas

I came across these broadcasting vans recently in London. The antenna that's deployed I think is a Vislink Advent uplink antenna, similar to this model, designed to transmit to satellites for ...
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2answers
101 views

Do you really need a satellite dish to communicate with satellites?

I'm doing a project where I have ground sensors that detect seismic activity and report their GPS coordinates via APRS if seismic activity is detected. I'd like to do the APRS over satellite. The ...
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1answer
102 views

Can anyone explain Phantom Power and, specifically, how it's used in satellite television systems?

Although I spent many years in the electrical field, I specialized in Electrical Metrology (a long time ago). Bearing this in mind, I really know very little about satellite television system theory. ...
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1answer
48 views

Source generator for Satellite Tuner input

I need to design a source generator for a TV factory. They want to automatize the functional tests by applying a test module to the TV's at the end of the production line. All the peripherals of the ...
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2answers
282 views

Current limiting solution for pocketqube satellite

A project I am working on requires a reliable current limiting solution for a pocketqube picosatellite. Currently a Texas TPS2553 is being employed which will cut power once the limit is hit. We are ...