Pulsations of the Known Universe
san_jose_guy
money was invented for handing to women, but buying dances is a chump's game
I'm not talking about the Search for Extra Terrestrial Intelligence. I'm talking more about receiving the signals of natural origin.
Does it work, from home, in town, in the backyard, from under the edge of a roof?
How large of a microwave dish do you need? 12" work?
Work in the daytime?
I guess there is thermal noise everywhere. If you point a microwave dish at the Sun, is there more thermal noise?
AIK, most of the things with really interesting microwave signatures are in deep space. So hard to see, takes extensive equipment. But how about the radio signals?
You would want the front end of the receiver and the down converter to be right out there on the antenna. Best to put the entire receiver out there, including conversion to digital, and some buffer memory. Then have two way communications so that messages can be sent for tuning, filtering, gain control, mode control, and requests for re-sends. Send the DC power two. If you have power to spare, you can use thermo-electric cooling to lower the noise floor.
Should it be on an equatorial telescope mount, with the motor to track the heavens? Should there be a spotting scope too? Or even a larger optical telescope? Not sure if you could see or listen to these kinds of space objects so easily.
Aiming is far less critical for a microwave dish than for an optical telescope.
Here, a magnetic compass is about 10 deg off. So instead of using that, you could put marks on the ground, or just permanently mount your equipment. If you can identify 3 stars and make spottings, that should be enough to make computerized corrections.
Think about it, a sound feed and imaging from a deep space object, there being used to make music and visuals, and in your own bed room.
Anyone doing backyard amateur radio astronomy?
SJG
Watch this video next, Universal Co-Masons
https://www.youtube.com/watch?v=36lC9RC2…
Recommended
https://www.anthropologymatters.com/inde…
Richard Smoley: The Shamanic Vision
https://www.youtube.com/watch?v=kI_KmST_…
Joe Bonamassa - "I'll Play The Blues For You" - Live At The Greek Theatre
https://www.youtube.com/watch?v=qoX0Olfq…
Nice looking, agree?
https://i2.wp.com/davidswanson.org/wp-co…
https://pixel.nymag.com/imgs/daily/intel…
Got something to say?
Start your own discussion
101 comments
https://www.nrao.edu/whatisra/hist_ham.s…
2.1 Meter, and a Direct TV dish
https://www.nrao.edu/epo/amateur/
Also Moon Bounce
37 pages, lots of technical info, even using liquid He to cool receiver!
http://www.rsgbshop.org/acatalog/PDF/AR_…
Shows how to make a meteorite radar. Not sure if that is legal, it transmits.
Talks about signals from Jupiter. That is interesting because of Jupiter's moons making it interesting visually too.
Periods of the 4 larges moons run from 1.8 to 17 days.
Backyard Radio Astronomy
https://www.youtube.com/watch?v=3EcrrLNl…
SJG
Ep. 008 - Legends of the Craft: Freemasonry and the Tower of Babel
https://www.youtube.com/watch?v=nBzWx2Bb…
Now this is Le Droit Humaine, Phoenix, and after the Universal Co-Masons separated
https://www.youtube.com/watch?v=sCA1s6i7…
Ro Khanna: Regime Change Is Not the Answer
https://www.youtube.com/watch?v=E3IbZlC8…
The Ancient War Between Gnostics and Neoplatonists
https://www.youtube.com/watch?v=E3IbZlC8…
Apocalypse of the Alien God: Platonism and the Exile of Sethian Gnosticism
https://www.amazon.com/gp/product/081224…
Apocalypse of the alien god : Platonism and the exile of Sethian gnosticism / Dylan M. Burns (2014)
jeff healey live at nottoden 2006
https://www.youtube.com/watch?v=U5Qb-6Qk…
https://www.youtube.com/watch?v=lWJNWotx…
Amateur Radio Telescope using SDR
https://www.youtube.com/watch?v=Umi7gCjF…
SJG
https://www.youtube.com/watch?v=3EcrrLNl…
The Milky Way as You’ve Never Seen It Before – AMNH SciCafe
https://www.youtube.com/watch?v=LOJ1XmbS…
BAA Radio Astronomy Group
https://www.youtube.com/watch?v=LOJ1XmbS…
SJG
Yanis Varoufakis: Socialism, Populism, Nationalism and Independence ( Aug 2018 )
https://www.youtube.com/watch?v=ZnFOfJsQ…
Yanis Varoufakis: Has capitalism failed us? ( May 2018 )
https://www.youtube.com/watch?v=gReGEDku…
Crazy Mini Engines
https://www.youtube.com/watch?v=ZfDZKanK…
Richard Smoley - The Kabbalah: Key to Hidden Knowledge
https://www.youtube.com/watch?v=g-R4sOrW…
Shocking Blue - Venus ( live 1969 )
https://www.youtube.com/watch?v=qWb8_DH8…
Have You Seen The Saucers - live, 1970
https://www.youtube.com/watch?v=xrVqhs4I…
https://www.youtube.com/watch?v=zqZEgoJa…
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TJ Street
https://c2.staticflickr.com/4/3752/96322…
Jefferson Airplane 5-7-1970 Fillmore East Complete Show
https://www.youtube.com/watch?v=xrVqhs4I…
Richard Smoley - The Kabbalah: Key to Hidden Knowledge
https://www.youtube.com/watch?v=g-R4sOrW…
https://www.youtube.com/watch?v=phWvEHg6…
SJG
https://www.youtube.com/watch?v=OBUZhAuE…
Jovian Io-B L-bursts recorded at 22.4 MHz and 22.2 MHz July 05 2016
https://vimeo.com/173638603
The Beginner's Guide To Software Defined Radio RTL-SDR
https://www.youtube.com/watch?v=nB6XQSEF…
SJG
https://www.nooelec.com/store/
SJG
SJG
http://www.rsgbshop.org/acatalog/PDF/AR_…
about 25 Mhz ( 12 meter ) signals coming from Jupiter.
Listening to Jupiter,
http://www.radio-astronomy.org/pdf/qex/r…
w/ links to more info.
SJG
El Chapo's Trial
https://nypost.com/2018/11/07/juror-sobs…
And all from the privacy of your own bedroom temple of the cosmos.
SJG
Sexy Girls World Map ( consider Ecuador and Argentina )
https://static.boredpanda.com/blog/wp-co…
Argentina
https://www.argentinaxp.com/wp-content/u…
Year of the Pig
http://media.gettyimages.com/vectors/hap…
It'd be out of this world ;)
SJG
https://www.youtube.com/watch?v=K98vSBLJ…
SJG
Alvin Lee – The Bluest Blues
https://www.youtube.com/watch?v=rB6OlJqV…
But they seem to have a large dish, how big does it need to be?
SJG
The End of Work and the Case for Universal Basic Income
Andy Stern, former President of the Service Employees International Union (SEIU), author of Raising the Floor: How a Universal Basic Income Can Renew Our Economy and Rebuild the American Dream, and Senior Fellow at Columbia University's Center for Business, Law, and Public Policy
https://www.youtube.com/watch?v=aKzNBXFn…
How Ayn Rand Became a Hero to Right Wing Nerds -- Thom Hartmann
https://www.youtube.com/watch?v=ZY1ik8bu…
Alec Baldwin: Trump's 'SNL' Attack May Be 'A Threat To My Safety'
https://www.yahoo.com/huffpost/alec-bald…
Kim Kardashian
https://www.yahoo.com/entertainment/kim-…
Thierry Mugler
https://en.wikipedia.org/wiki/Thierry_Mu…
https://www.muglerusa.com/
http://www.livingly.com/The+Most+Beautif…
Intimidation, Pressure and Humiliation: Inside Trump’s Two-Year War on the Investigations Encircling Him -- New York Times
https://www.nytimes.com/2019/02/19/us/po…
Venus, Shocking Blue, actually live, with only what you see on stage, and not hamming for the camera, quite good, a coffee house grade performance
https://www.youtube.com/watch?v=qWb8_DH8…
Alvin Lee – The Bluest Blues
https://www.youtube.com/watch?v=rB6OlJqV…
JEFF BECK -Brush With the Blues
https://www.youtube.com/watch?v=TlqyLqDt…
Joe Bonamassa - I'll Play The Blues For You
https://www.youtube.com/watch?v=6-Jzcu5S…
https://www.youtube.com/watch?v=MSqC84JW…
SJG
Losing Arguments with Your Wife After Her Brain Surgery - Jim Gaffigan
https://www.youtube.com/watch?v=UVDYXB-d…
A most impressive article:
https://www.nytimes.com/2019/02/19/us/po…
The origins of freemasonry : facts & fictions / Margaret C. Jacob. (2006)
Ending the Punishment of Poverty: Supreme Court Rules Against High Fines & Civil Asset Forfeiture
https://www.democracynow.org/2019/2/21/e…
Frances Fox Piven, Professor of Political Science and Sociology at the Graduate Center, CUNY
https://www.youtube.com/watch?v=oQBgRPtL…
https://www.amazon.com/gp/product/B00IHG…
NOLO, Bourbon Street
http://doxyspotting.com/?p=131772
AZTECA
https://www.youtube.com/watch?v=yS9WVbQT…
Peter Green - In The Skies ( Full Album ) 1979
https://www.youtube.com/watch?v=U_Llz6n8…
https://www.youtube.com/watch?v=zga8bhlm…
I love the smell of napalm in the morning
https://www.youtube.com/watch?v=ALi78xSa…
https://www.youtube.com/watch?v=-V6NYHal…
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Love For Sale ( cover of Billy Holiday )
https://www.youtube.com/watch?v=8htJVyav…
Sunday on the Front Stoop; 'Critical Path', What was Buckminster Fuller trying to tell us?
https://www.youtube.com/watch?v=zqCZPxOB…
http://doxyspotting.com/?p=70423
http://doxyspotting.com/?p=88179
Pablo Sender - The Secret Doctrine: Part 1 - How to Study The Secret Doctrine
https://www.youtube.com/watch?v=_O2hdnG6…
James Phillips - Secrets of Adepts: An Introduction
https://www.youtube.com/watch?v=vTILhZ3d…
House Votes to Block Trump National Emergency Declaration ( tally means this must have been bipartisan, so it then could pass the Senate. Walls take time to build. So the idea that you build it by declaring a National Emergency is preposterous.)
https://www.democracynow.org/2019/2/27/h…
http://www.olasu.com.uy/arch_contenidos/…
SJG
Kenneth Grant & Typhonian References
https://www.youtube.com/watch?v=ex33k5hv…
Bernie Sanders Kicks Off 2020 Run in Brooklyn, New York
Sen. Rand Paul Likely to Oppose Nat’l Emergency in Decisive Vote
https://www.democracynow.org/2019/3/4/he…
Metallica - Ain't My Bitch
https://www.youtube.com/watch?v=hNXmKiEq…
Master of Puppets
https://www.youtube.com/watch?v=S7blkui3…
Metallica - Bleeding Me
https://www.youtube.com/watch?v=ftV_XepI…
https://www.youtube.com/watch?v=ftV_XepI…
Thin Lizzy Full Concert U K 1983
https://www.youtube.com/watch?v=hq9qy6TD…
Do you use basic antennae, moderate directionallity, or have you ever looked into multiple element phased arrays.
For Moon and meteor bounce are you actually able to do this with VHF, what band, and how much power?
SJG
https://www.mathworks.com/campaigns/offe…
SJG
https://www.mathworks.com/?s_tid=gn_logo
SJG
SJG
You do realize out of 26 comments on this thread, that you have over 20 of them? You sure like talking to yourself!
SJG
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https://www.mathworks.com/solutions.html…
Quite broad, but it is still possible to do better!
SJG
https://iopscience.iop.org/article/10.10…
SJG
D-day Broadcast 1
https://www.youtube.com/watch?v=OxBO-Ynx…
NBC broadcast, first London confirmation
https://www.youtube.com/watch?v=Bj2pXLZd…
Charles Walker
Richard Richards
Linda Goodwin
Jerry Ross
Bob Kelso
Grissom family
Scott Grissom
Mark Grissom
Lowell Grissom
It was fucking AWESOME!
They talked about how the space walks were, how the took a shit, how they got to see nightband day 16 x a day due to the fact the circled the earth every 90 minutes. Pretty cool actually.
SJG
Universe - Universe 1971 (FULL ALBUM) [Hard | Blues Rock]
https://www.youtube.com/watch?v=4kSma2pg…
SJG
https://www.youtube.com/watch?v=Qgo_oQed…
SJG
For a General Class license it used to be 13 WPM code. Still true? Do you practice much, and do you like to use Morse Code? It is known that with the right filtering, code ( CW ) can use a very narrow band.
Some say that by the technology standards of today though, the HAM radio modulation schemes are way out of date. Most stuff today is spread spectrum, the mathematics supports this, and it does work wonders.
SJG
Grace Potter and Joe Satriani cover Cortez the Killer
https://www.youtube.com/watch?v=paeNnR3
Dave Matthews and Warren Hayes
https://www.youtube.com/watch?v=yiO13jTs…
So do you just need to pass the theory and rules written test for the General Class License?
So do you have a technician license now? Does that restrict you to VHF only? Always seemed a problem to me, as Novices would use CW on HF.
When I was talking about a modernized phased array system I was envisioning HF. FCC has such for monitoring HAM HF.
SJG
3.5Ghz, is this what these new WiFi routers are using?
https://www.fcc.gov/wireless/bureau-divi…
SJG
TOP DEFINITION
san jose guy
A chump who enjoys GFE make out sessions in the front room of local strip clubs. He also enjoys Hungry Man dinners while sitting in his footy pajamas in his mother’s basement. A victim of brain erosion due to chronic masturbation.
I just enjoyed a great San Jose Guy experience! My cock is sore, and my tongue is burned (from my Hungry Man dinner), and my mom is upset because I got jizz on the mashed potatoes.
by Cashman1234 October 29, 2017
https://kh6jrm.blogspot.com/2015/06/phas…
SJG
https://bigislandarrlnews.com/
SJG
SJG
YES. Technician Class, General Class, Amateur Extra Class. Basics 35 question test for Tech and General, 50 Question for Amateur Extra. Tech mainly limited to 2m and 70 cm,VHF\UHF, but can use CW on 10,15,40,and 80 meter band.
I have a General License, studying for AE License which gets heavy into the antennas.
Phased array system would be good for any band I would think. Although, it seems it would be excellent for long distance (DX) on HF.
As far as the FCC Monitoring it on the Amateur frequency’s... they pretty much leave that up to the HAM OPERATORS to self monitor each other. Not sure about the 386 you referenced.
HAM Radio on any island is very cool. There are some Advanced HAM operators who travel to remote islands just so they can log contacts from their mobile setups on those islands.
Phased arrays, because of solid state and digital, you could have dedicated digitally run transceiver heads for each element.
FCC monitors 20 meters with something like this. Not sure where it is or how to find out about it.
SJG
The technical class had been a kind of trap, locking one into VHF, forcing them out of HF.
SJG
So as they don't require Morse Code anymore, dropping Novice Class is probably a good move.
SJG
As far as taking questions about myself, I have very sensitive and all encompassing responsibilities. Its almost like I am running my own CIA. So I do not ever rule anything in or out.
SJG
https://forums.qrz.com/index.php?threads…
https://forums.qrz.com/index.php?threads…
old 1996 post
https://groups.google.com/forum/#!topic/…
FCC Amateur Radio Service
https://www.fcc.gov/wireless/bureau-divi…
Guy has one for 30 meters and 40 meters, is 60 meters by 300 meters, and uses mile of wire for a ground screen. Not sure how the drive works, doesn't sound like active digital direct to each element. But does somehow get rid of interference, likely by filtering and somehow subtracting.
https://www.nk7z.net/phased-array/
SJG
Richard Smoley, always good
https://www.youtube.com/watch?v=N04WHX1N…
Sun, Sand, Prostitutes? Dominican Republic has legal prostitution
https://www.youtube.com/watch?v=FthM86ds…
You get the idea, good antenna gain, no physical movement.
The FCC monitors ham bands that way, though I have not found specific info.
SJG
I would guess that it uses 1/4 wave length verticals, so 5 meters high, I guess.
The problem with the old license system was that people might start as Novices, 5 wpm, and CW HF only, and crystal controlled.
Then they would become Technicians, also 5wpm requirement, and they would get stuck on voice VHF.
Many never would make it to General, 13 wpm, Advanced 13wpm, or Extra, 20wpm.
So Technician became a trap, and Novice was something many did not like.
Though Heathkit made their legendary HW-101's with a single 6146B tube, to do the 75 watts, CW only, crystal controlled transmitting.
As they have dumped the Morse Code requirement, good that they dumped the Novice License class.
Thank you for your very good information.
SJG
P.S. In ARRL books they explained about how long ago an FCC inspector was visiting the home of a HAM with a nice rig. He used double sideband AM, and this meant the old full power modulator tube. He was talking to someone voice, and the modulator tube failed. So he continued talking with CW.
The inspector was so impressed that it was decided to make all HAMs demonstrate CW proficiency for all time. So this is the reason given.
But though I kind of think CW is neat, it does mean far less people getting licenses.
Do you ever communicate CW? How many wpm do you think?
Interesting about the CW mandate. I could see how learning CW could be absolutely beneficial in times of war or disorder. I would have to jot down every sequence and then refer to a chart, but I think I could decipher if push came to shove. I would work through it.
Learning to send at moderate speeds is less difficult that learning to receive. Standard straight key works just fine. Need a little training audio oscillator. Also nice if you can make your own training tapes.
I had installed two RCA connectors on a telephone, to send and receive stuff over the phone.
Had old WWII surplus general coverage radio receiver too, up to 30Mhz.
You know Edison made this thing which could send multiple Morse code signals at once. And then modern digital, is the continuation of Morse code.
Probably a negative to make people learn Morse code for a HAM license today. But I still think it is kind of neat. If you use some transmit filtering you can go very narrow bandwidth. And an output stage can put out more power if it is CW only.
SJG
SJG
People who are good at it are actually hearing whole words.
Learn to receive some first, sending is then comparatively easy. Simple straight key to start with. In my view, you never need anything more.
https://www.youtube.com/watch?v=OB1RUBwA…
Ham radio gear had been simpler and lower cost. People often built from scratch, or built kits. ARRL books always had lots of good projects. Worth having all the editions of all the books they have ever published. Their basic manual was outstanding. For the patient reader, you really could learn electronics just from their intro chapter.
https://www.radioremembered.org/HW-101.h…
Does CW and Single Sideband, but not AM. AM would make too much of a steady state output stage demand.
With CW and AM ( double sideband with carrier ) can be done with a class C power amplifier. The latter will then need a full power modulator, but that is only audio frequency. Much greater thermal efficiency in the class C amp, so much less needed for the final elements.
But SSB is more complicated to generate, and so then you need to have a linear output stage. Much lower thermal efficiency. Makes it all into a bigger scale project.
As sophisticated SSB rigs with very fine tuning and sophisticated filtering and multiple conversions proliferated, it went beyond the capabilities of the amateur builder.
Some people were still building linear power booster amps though.
SJG
Montrose - Live KSAN Radio Session (Live @ Record Plant, Sausalito, CA, USA 04.21.73.)
https://www.youtube.com/watch?v=mzC835bh…
https://www.youtube.com/watch?v=JWzPH4EZ…
Space Station #5
https://www.youtube.com/watch?v=aZXF7Ipu…
So why not just make a box with no controls and do it all by an external computer?
There are some of these on the market now.
SJG
Stephan Hoeller
https://www.youtube.com/watch?v=mj5QW8vc…
SJG
King Crimson - Live in Hyde Park (1969) - Complete Performance
https://www.youtube.com/watch?v=tiA_q-Kf…
Imagine how well this would work that that kind of antenna gain.
SJG
Or is their too much loss considering that most of those one would be communicating with would be using 1/2 wave horizontal dipoles? Making a phased array with horizontal 1/2 wave would be more complex and it would take more space.
This is why I want to see how the FCC did it for monitoring.
SJG
http://www.arrl.org/frequency-allocation…
http://www.arrl.org/frequency-allocation…
Yes, they seem to, more and more small bands allocated. And some special stuff.
But most allow this RTTY/Data
Yes, they have this new PSK31.
But then this RTTY/Data goes way back.
http://www.arrl.org/files/file/ContestRe…
So the answer is a definitive yes, but there are rules, and also rules about utilization.
SJG
White Girl
https://www.youtube.com/watch?v=3e4KTTyF…
The B-52's - "Rock Lobster" (Countdown 1980)
https://www.youtube.com/watch?v=2VCCiY17…
the B-52's - Give Me Back My Man
https://www.youtube.com/watch?v=Hl_EEpRf…
The B-52's - Roam (Official Music Video)
https://www.youtube.com/watch?v=iNwC0sp-…
The B-52's - Rock Lobster (Official Music Video)
https://www.youtube.com/watch?v=n4QSYx4w…
The B 52s With the Wild Crowd! Live In Athens, GA 2011
https://www.youtube.com/watch?v=NBpYsS5V…
https://en.wikipedia.org/wiki/The_B-52%2…
Garbage - Stupid Girl (Live "Album De La Semaine" 2012)
https://www.youtube.com/watch?v=Oi5tsVZW…
Though I have read accounts of rudeness, like what is common on the Internet, on 20 meters.
Universal Licensing System
http://www.arrl.org/universal-licensing-…
FCC Site
https://www.fcc.gov/wireless/bureau-divi…
Only 3 current license classes, no morse code requirement
https://www.fcc.gov/wireless/bureau-divi…
Here they talk about commercial and maritime licensing
http://www.arrl.org/commercial-licenses
https://www.fcc.gov/wireless/bureau-divi…
sounds like you don't need any license to repair citizen's band radio gear. Used to need this.
Icom HAM transceiver
https://www.gigaparts.com/icom-ic-7300.h…
Very cheap, 40 ch 4 W CB radio.
https://www.grainger.com/product/33UG04?…!
https://www.gigaparts.com/icom-ic-7300.h…
https://en.wikipedia.org/wiki/Citizens_b…
Yeah, 40 channels. As I had seen, crystal controlled. Better to do digital synthesis, in my opinion, so just one crystal.
11 meters.
But now they also have this 49Mhz and something on UHF. One of these is called Family Radio Service.
Bummer!
https://www.mercurynews.com/2017/03/24/s…
Also lost the Digital Guru Bookstore out there!
SJG
A Clockwork Orange, ending
https://www.youtube.com/watch?v=Vt66s7OO…
Garbage - Vow
https://www.youtube.com/watch?v=12C_xRI0…
The Trick Is To Keep Breathing
https://www.youtube.com/watch?v=H6ZfzBQM…
Automatic Systemic Habit
https://www.youtube.com/watch?v=gZNmCNSA…
Cream White Room
https://www.youtube.com/watch?v=dCc00pX_…
Garbage - Milk
https://www.youtube.com/watch?v=y14Kp1Di…
So there will also be other types of licensed uses in these ranges.
So in this age of satellites and fiber optics, I want to look at terrestrial microwave and milimeter wave.
https://www.slideshare.net/FarhanaParvin…
Using parabolic dish and low gigahertz, most common form of long distance communications. (So I assume this means over satellite, fiber, or copper.
EHF
https://en.wikipedia.org/wiki/Extremely_…
30 to 300 gigahertz
Compared to lower bands, radio waves in this band have high atmospheric attenuation: they are absorbed by the gases in the atmosphere. Therefore, they have a short range and can only be used for terrestrial communication over about a kilometer. Absorption by humidity in the atmosphere is significant except in desert environments, and attenuation by rain (rain fade) is a serious problem even over short distances. However the short propagation range allows smaller frequency reuse distances than lower frequencies. The short wavelength allows modest size antennas to have a small beam width, further increasing frequency reuse potential.
In the United States, the band 36.0 – 40.0 GHz is used for licensed high-speed microwave data links, and the 60 GHz band can be used for unlicensed short range (1.7 km) data links with data throughputs up to 2.5 Gbit/s. It is used commonly in flat terrain.
The 71–76, 81–86 and 92–95 GHz bands are also used for point-to-point high-bandwidth communication links. These higher frequencies do not suffer from oxygen absorption, but require a transmitting license in the US from the Federal Communications Commission (FCC). There are plans for 10 Gbit/s links using these frequencies as well. In the case of the 92–95 GHz band, a small 100 MHz range has been reserved for space-borne radios, limiting this reserved range to a transmission rate of under a few gigabits per second.[6]
A CableFree MMW link installed in the UAE installed for Safe City applications, providing 1Gbit/s capacity between sites. The links are fast to deploy and have a lower cost than fibre optics.
The band is essentially undeveloped and available for use in a broad range of new products and services, including high-speed, point-to-point wireless local area networks and broadband Internet access. WirelessHD is another recent technology that operates near the 60 GHz range. Highly directional, "pencil-beam" signal characteristics permit different systems to operate close to one another without causing interference. Potential applications include radar systems with very high resolution.
The Wi-Fi standard IEEE 802.11ad operates in the 60 GHz (V band) spectrum to achieve data transfer rates as high as 7 Gbit/s.
Uses of the millimeter wave bands include point-to-point communications, intersatellite links, and point-to-multipoint communications. There are tentative plans to use millimeter waves in future 5G mobile phones.[7] In addition, use of millimeter wave bands for vehicular communication is also emerging as an attractive solution to support (semi-)autonomous vehicular communications.[8]
Shorter wavelengths in this band permit the use of smaller antennas to achieve the same high directivity and high gain as larger ones in lower bands. The immediate consequence of this high directivity, coupled with the high free space loss at these frequencies, is the possibility of a more efficient use of frequencies for point-to-multipoint applications. Since a greater number of highly directive antennas can be placed in a given area, the net result is greater frequency reuse, and higher density of users. The high usable channel capacity in this band might allow it to serve some applications that would otherwise use fiber-optic communication.
old book, Artech House, 1989
Terrestrial digital microwave communications / Ferdo Ivanek, editor.
SJG
The Not-So-Great Reason Divorce Rates Are Declining
Atlantic
https://getpocket.com/explore/item/the-n…
Here, looks like a trade magazine:
https://www.rfwireless-world.com/Termino…
SJG
Talking about low gigahertz and for a few miles between repeater stations. Wonder if that is really the max range?
http://vclab.tu-sofia.bg/AVC%20Network%2…
Otherwise you tend to get into leased lines, and I guess fiber.
And here they talk about spread spectrum.
http://vclab.tu-sofia.bg/AVC%20Network%2…
SJG
Modern Microwave Links can carry up to 400Mbps in a 56MHz channel using 256QAM modulation and IP header compression techniques. Operating Distances for microwave links are determined by antenna size (gain), frequency band, and link capacity. The availability of clear Line of Sight is crucial for Microwave links for which the Earth’s curvature has to be allowed
Microwave signals are often divided into three categories:
ultra high frequency (UHF) (0.3-3 GHz);
super high frequency (SHF) (3-30 GHz); and
extremely high frequency (EHF) (30-300 GHz).
In addition, microwave frequency bands are designated by specific letters. The designations by the Radio Society of Great Britain are given below.
Microwave frequency bands
Designation Frequency range
L band 1 to 2 GHz
S band 2 to 4 GHz
C band 4 to 8 GHz
X band 8 to 12 GHz
Ku band 12 to 18 GHz
K band 18 to 26.5 GHz
Ka band 26.5 to 40 GHz
Q band 30 to 50 GHz
U band 40 to 60 GHz
V band 50 to 75 GHz
E band 60 to 90 GHz
W band 75 to 110 GHz
F band 90 to 140 GHz
D band 110 to 170 GHz
The term “P band” is sometimes used for ultra high frequencies below the L-band. For other definitions, see Letter Designations of Microwave Bands
Lower Microwave frequencies are used for longer links, and regions with higher rain fade. Conversely, Higher frequencies are used for shorter links and regions with lower rain fade.
Rain fade refers primarily to the absorption of a microwave radio frequency (RF) signal by atmospheric rain, snow or ice, and losses which are especially prevalent at frequencies above 11 GHz. It also refers to the degradation of a signal caused by the electromagnetic interference of the leading edge of a storm front. Rain fade can be caused by precipitation at the uplink or downlink location. However, it does not need to be raining at a location for it to be affected by rain fade, as the signal may pass through precipitation many miles away, especially if the satellite dish has a low look angle. From 5 to 20 percent of rain fade or satellite signal attenuation may also be caused by rain, snow or ice on the uplink or downlink antenna reflector, radome or feed horn. Rain fade is not limited to satellite uplinks or downlinks, it also can affect terrestrial point to point microwave links (those on the earth’s surface).
Possible ways to overcome the effects of rain fade are site diversity, uplink power control, variable rate encoding, receiving antennas larger (i.e. higher gain) than the required size for normal weather conditions, and hydrophobic coatings.
Diverse Path Resilient Failover
In terrestrial point to point microwave systems ranging from 11 GHz to 80 GHz, a parallel backup link can be installed alongside a rain fade prone higher bandwidth connection. In this arrangement, a primary link such as an 80GHz 1 Gbit/s full duplex microwave bridge may be calculated to have a 99.9% availability rate over the period of one year. The calculated 99.9% availability rate means that the link may be down for a cumulative total of ten or more hours per year as the peaks of rain storms pass over the area. A secondary lower bandwidth link such as a 5.8 GHz based 100 Mbit/s bridge may be installed parallel to the primary link, with routers on both ends controlling automatic failover to the 100 Mbit/s bridge when the primary 1 Gbit/s link is down due to rain fade. Using this arrangement, high frequency point to point links (23GHz+) may be installed to service locations many kilometers farther than could be served with a single link requiring 99.99% uptime over the course of one year.
•Backbone links and “Last Mile” Communication for cellular network operators
•Backbone links for Internet Service Providers (ISPs) and Wireless ISPs (WISPs)
•Corporate Networks for Building to Building and campus sites
•Telecommunications, in linking remote and regional telephone exchanges to larger (main) exchanges without the need for copper/optical fibre lines.
•Broadcast Television with HD-SDI and SMPTE standards
Microwave Links are a valuable tool in Mobile Carrier Backhaul: Microwave technology can be deployed to provide traditional PDH 16xE1/T1, STM-1 and STM-4, and Modern IP Gigabit Ethernet backhaul connectivity and Greenfield mobile networks. Microwave is far quicker to install and lower Total Cost of Ownership for Cellular Network Operators compared to deploying or leasing fibre optic networks
Cable Free, Oxford UK, lots of products
https://www.cablefree.net/
4G LTE
https://www.4g-lte.net/
Gigabit Wireless
https://www.gigabit-wireless.com/
Olive Tree Suite, Oxford
https://www.olivetreesuite.com/
Terrestrial Microwave
https://science.blurtit.com/3143496/what…
https://www.reference.com/technology/ter…
SJG
https://blog.aviatnetworks.com/from-the-…
I guess over water is more difficult, due to humidity losses, but it is also a way to get a long line of site, if you have high enough towers or mountains.
Aviat
https://aviatnetworks.com/about-us/overv…
Based in Milpitas CA, but with offices all kinds of other places.
https://en.wikipedia.org/wiki/Aviat_Netw…
SJG
Does that give you line of sight for 60 miles.
Over water, ships vanish after about 10 miles.
SJG
Hey, if I were Governor of California, I would not mind taking her to Africa:
https://www.youtube.com/watch?v=yBg5cnoN…
https://blog.aviatnetworks.com/from-the-…
Honduras
Site A, “Las Cruces,” is at 1600 meters above mean sea level and Site B, “Dixon Hill,” at 250 meters on Roatan Island.
Not sure if this will show here, but seems to run from mountain far inland to island. Used for air traffic control.
https://www.google.com/maps/place/Las+Cr…
SJG
https://www.google.com/maps/place/Coxen+…
SJG
I guess other way is just voice radio. Digital network is better.
SJG
1. Line of sight restriction, cuts down distance. 120 mile microwave link is over water and between mountains. Usually only half that.
2. If you have ionospheric skip, probably ghosting ruins high speed data.
3. Laser beam very weather limited.
4. Satellites work, but very expensive to use. Maybe Musk can launch more, but still very expensive.
So we end up with fiber on land and fiber under the water.
SJG
Some kind of Meta Physics, vastly higher energy levels, higher dimensions?
Maybe lots of lower altitude satellites, zipping past over our heads.
https://blog.aviatnetworks.com/from-the-…
6GHz, QPSK, 40 Mbps, 193-km path in Honduras
The measured unfaded link RBER (Residual Bit Error Rate) performance test showed a result of 1×10-13, or just one bit error for every trillion bits received. This level of error performance is equivalent to what you would expect if you connected two Eclipse terminals on a bench, directly connected by a cable!
All Outdoor Radio
https://aviatnetworks.com/products/all-o…
E-Band, 80 Ghz
https://www.youtube.com/watch?v=gKqtyVfM…
Dual band does 10 Gbits/second
up to 8km range.
for the "5G capacity challenge"
Single integrated Multi-Band radio includes single channel 80 GHz plus a single or dual-channel microwave (6-42 GHz) support in one self-contained and integrated outdoor unit.
But their 80Ghz system can do 20Gbits/second
High Power Radios, 5x more transmit power
https://aviatnetworks.com/solutions/high…
SJG
https://www.rfwireless-world.com/Termino…
Types of orbits, Geosync, two elipticals which can complement it, and then a low one for radiometry.
SJG
https://www.rfwireless-world.com/Tutoria…
SJG
Researching the origins of the Ricks, meetings held at Farben Haus in Frankfurt, end of 1943. They knew that there was no way to prevail, not with the Soviet Union on one front and the United States on the other.
https://www.tuscl.net/discussion.php?id=…
Did Jesus Die for E.T.’s Sins?
https://www.tuscl.net/discussion.php?id=…
Wooking for any available guard dog 🐕 jobs
https://www.tuscl.net/discussion.php?id=…
Should we admit dogs? A rick conundrum
https://www.tuscl.net/discussion.php?id=…
is skibum’s real name fred?
https://www.tuscl.net/discussion.php?id=…
Nietzsche's Task: An Interpretation of Beyond Good and Evil
https://www.amazon.com/Nietzsches-Task-I…
Tom Petty And The Heartbreakers - I Won't Back Down (Official Music Video)
https://www.youtube.com/watch?v=nvlTJrNJ…
Chords
https://tabs.ultimate-guitar.com/tab/tom…
Time Has Come Today(Chambers Brothers-Long Version)
https://www.youtube.com/watch?v=_zfgoJzO…
I make you feel like real man!
2G stands for 2nd generation wireless technologies,for example GSM standard falls under this category.
3G stands for 3rd generation wireless technologies, for example CDMA,HSPA falls under this category.
https://www.rfwireless-world.com/Termino…
3G vs 4G
RF Frequency Band About 1.8 to 2.5GHz About 2-8 GHz
RF Bandwidth 5-20 MHz 100 MHz and more.
Data rate 384 kbps- 2 Mbps 20-100Mbps in mobile
https://www.rfwireless-world.com/Termino…
4G vs 5G
Peak Data Rate 1 Gbps 10 Gbps
Data Bandwidth 2Mbps to 1Gbps 1Gbps and higher as per need
Spectral Efficiency 30 b/s/Hz 120 b/s/Hz
Holy Shit!
SJG
https://www.youtube.com/watch?v=yo2qbIkF…
SJG
The big orbiter was because they wanted to be able to bring big things out of orbit.
But other than human life, not much worth the cost of bringing things out of orbit.
They did say that when NASA had to start working with the Air Force and the CIA, the shuttle got bigger, as they had communications and spy satellites they want to bring back down.
They say that the concept for the shuttle did come from Wernher von Braun, a project paperclip Nazi. And that it was during the heights of the cold war.
What the above video does not say, which should be obvious, was that the space shuttle was intended to serve in the cold war as bomber planes were. A load of nuclear weapons would be sent up with a crew. Then it could be brought back down. Presumable another would be sent up during that time.
Bringing these weapons up, and then back down, is why the orbiter is so big, and hence why it was a totally failed program.
What they have to take its place now is small, just room for like 8 people, nothing else. Built by Boeing.
SJG
http://www.cpri.info/downloads/CPRI_Spec…
Millimeter Wave Links
https://www.cablefree.net/wirelesstechno…
SJG
So this shows the windows for good transmission, I think?
https://i0.wp.com/www.cablefree.net/wp-c…
57 – 66GHz: The 60GHz Millimeter Wave Band or V-Band is governed by OFCOM for licensed operation. The large amount of signal absorption via atmospheric oxygen and tight regulations make this frequency band more suited to short range, Point-to-Point and Point-to-Multipoint Millimetre Wave solutions. Between 57 – 64GHz the band is licensed and regulated but from 64 – 66GHz the band is unlicensed and self coordinated.
71 – 76GHz and 81 – 86GHz: The 70GHz and 80GHz Millimeter Wave Bands or E-Bands are governed by OFCOM for licensed operation only and are regarded to be the most suited band for Point-to-Point and Point-to-Multipoint, Millimeter Wave Wireless Networking and communication transmission. Each band has a 5GHz spectral range available which totals to be more than all other assigned frequency bands added together. Each 5GHz range can act as a single contiguous wireless transmission channel allowing very efficient use of the whole band and in turn these result in high throughput speeds from 1 to 3 Gbps whilst only using simple modulation techniques such as OOK (On-Off-Keying) or BPSK (Binary Phase Shift Keying). These throughput speeds are substantially higher than those found in lower frequencies using much more complex and advanced orders of modulation so even higher throughput speeds should be achieved with Millimetre Wave devices when utilising the same advanced techniques. It should be only a matter time before market demand brings these to the forefront.
In the US, an additional band is available as well as the above which is:
92 – 95GHz: The 94GHz Millimeter Wave Band or W-Band is governed by the FCC Part 15 for unlicensed operation also but only for indoor usage. It may also be used to outdoor Point-to-Point applications following the FCC Part 101 regulations but due to a range between 94 – 94.1GHz being excluded, the band is less spectrally efficient than the others.
The 71-76, 81-86 and 92-95 GHz bands are also used for point-to-point high-bandwidth communication links. These frequencies, as opposed to the 60 GHz frequency, do not suffer from the effects of oxygen absorption, but require a transmitting license in the US from the Federal Communications Commission (FCC). There are plans for 10 Gbit/s links using these frequencies as well. In the case of the 92–95 GHz band, a small 100 MHz range has been reserved for space-borne radios, making this reserved range limited to a transmission rate of under a few gigabits per second.
The band is essentially undeveloped and available for use in a broad range of new products and services, including high-speed, point-to-point wireless local area networks and broadband Internet access. WirelessHD is another recent technology that operates near the 60 GHz range. Highly directional, “pencil-beam” signal characteristics permit different systems to operate close to one another without causing interference. Potential applications include radar systems with very high resolution.
The upcoming Wi-Fi standard IEEE 802.11ad will run on the 60 GHz (V band) spectrum with data transfer rates of up to 7 Gbit/s.
Uses of the millimeter wave bands include point-to-point communications, intersatellite links, and point-to-multipoint communications.
Because of shorter wavelengths, the band permits the use of smaller antennas than would be required for similar circumstances in the lower bands, to achieve the same high directivity and high gain. The immediate consequence of this high directivity, coupled with the high free space loss at these frequencies, is the possibility of a more efficient use of the spectrum for point-to-multipoint applications. Since a greater number of highly directive antennas can be placed in a given area than less directive antennas, the net result is higher reuse of the spectrum, and higher density of users, as compared to lower frequencies. Furthermore, because one can place more voice channels or broadband information using a higher frequency to transmit the information, this spectrum could potentially be used as a replacement for or supplement to fiber optics.
^^^^ actually quite complex, but seemingly open enough in licensing that one could do what they need to.
SJG
https://www.youtube.com/watch?v=X70BTP_p…
Planet Nine could be a miniature black hole hiding in our solar system
https://www.digitaltrends.com/cool-tech/…
SJG
https://www.inphi.com/
Inphi transimpedance amplifiers (TIAs) power the fastest networks on the planet. TIAs are the essential building blocks that take a weak electrical signal from the photodiode in the optical receiver, clean it up and amplify it before transmitting it to the digital signal processing unit.
https://www.inphi.com/products/
https://en.wikipedia.org/wiki/Transimped…
Bob Pease 2001
https://www.electronicdesign.com/technol…
Optical IQ modulators for coherent 100G and beyond (InP)
https://www.lightwaveonline.com/optical-…
IN5661TA
56 GBaud
https://www.inphi.com/technical-document…
IN5661TA
56 Gbaud Single-Channel, Single-Ended Input, Linear Transimpedance / Variable-Gain Amplifier
Part No.
IN5661TA
Product Type
Transimpedance Amplifiers
Market Segments
Inside Data Centers
Applications
100GbE-DR1 SMF Optical Receiver
Features
Supports data rates up to 56 Gbaud
Single-channel monolithic TIA/VGA
Wide differential electrical gain, typical
High electrical bandwidth
Adjustable AGC output amplitude
Low noise
Low power consumption
Available in die form
Description
The IN5661TA is a single-channel, single-ended input linear transimpedance/variable-gain amplifier (TIA/VGA) for 100GbE-DR1 SMF optical receiver
In Search of Optical Networking's 'Holy Grail' ( very good article, mid 2019)
https://www.lightreading.com/components/…
************
A lot of the limits of how much one can stay current with is just getting access to books and journal articles.
Having been in a field where I had to read about 30 papers per month, I learned this. And this included books and theses too.
There are monetary costs.
But then it is also just the time. My Org. will have many think tank sections to try and contend with this.
SJG
Santana 2009
https://www.youtube.com/watch?v=DlGrSBlV…
https://www.richardsonrfpd.com/Supplier/…
The Pacific Monolithics Division of Richardson RFPD offers a range of low cost, packaged RF integrated circuits for Cellular, PCS and ISM bands. Products include power amplifiers, switches, attenuators and LNAs covering the spectrum from 800 to 2500 MHz. The amplifiers offer operating efficiencies greater than 50% and output power in excess of 1 watt using a single 3 or 5 volt supply. Richardson RFPD acquired the assets of Pacific Monolithics RFIC group in 1998 and continue to provide full support to the product line, with production at independent wafer fabs, while automated test is done at our Lafox, IL facility. Demo boards are available for most parts, and product samples and applications support are provided on request.
SJG
Daniel Castro - I'll Play The Blues For You
https://www.youtube.com/watch?v=ioOzsi9a…
Slow Blues/ Blues Ballads 1 - A two hour long compilation
https://www.youtube.com/watch?v=V8oaxsHC…
TJ Street
https://tuscl.net/photos/5d699507cd73c
https://tuscl.net/photo.php?id=1061
https://www.spiedigitallibrary.org/confe…
1993
SJG
Open:
R Programming Language
https://tuscl.net/discussion.php?id=6069…
Right Wing Jews
https://tuscl.net/discussion.php?id=6456…
Closed:
Fighting Against Christianity
https://tuscl.net/discussion.php?id=5091…
https://www.nist.gov/time-distribution/r…
https://www.nist.gov/pml/time-and-freque…
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