In the USA, how or where can I see the Cellular spectrum being allocated for each carrier, i.e. AT&T, Verizon and others?
I am specifically interested in the 850 CLR band (B5) 824-849MHz // 869-894MHz and which entities owns frequency in the 25Mhz
https://www.fcc.gov/wireless/bureau-divisions/mobility-division/800-mhz-cellular-service
There is something I had found below from Tutela which shows B5 is really very limited deployed around the USA. Just wondering which chunk of spectrum belongs to which carrier, for example, 824–829 is ATT and 829–834 VZW etc,
https://www.tutela.com/blog/spectrum-analysis-diversity-is-the-name-of-the-game-for-att
https://preview.redd.it/b0yn1gj1h7u61.png?width=680&format=png&auto=webp&s=01c75092367b21d36a4923c105fd964d5537ae8e
A reference for all the "Help me identify this signal" questions, etc. and just a handy thing to have around.
This is a link to a PDF, last updated January 2016 (the most recent version available afaik):
https://www.ntia.doc.gov/files/ntia/publications/january_2016_spectrum_wall_chart.pdf
You can order a print version of the poster from the Government Printing Office here, suitable for hanging on your wall (36 x 48 inches) for $6 USD. Totally worth it.
https://bookstore.gpo.gov/products/united-states-frequency-allocations-radio-spectrum-poster
For example, this would prevent browsing by new to be swamped or dominated by one subreddit. Maybe just a low medium high priority assignment like with torrents.
I found an IEEE Database of Frequency Allocations resource I thought would be worth sharing.
It can be a good starting point for anyone wanting to know what a signal is inside a given frequency range is no matter what country they are in!
It's as simple as that, just thought I would share it.
So I know that in the US, 30-88 MHz is considered reserved for military use
I also know that about 462-467 MHz is Family Radio stations (FRS)---what typical walkie talkies use
However, on the official FCC allocation chart, I don't see either of these pop up. I'm trying to Learn which parts of the spectrum are typically being used by which people
So what's the deal with the FCC chart and how do I truly go about finding out who's using which bands?
I found some pdfs, but they are quite dated, and if I recall correctly there were some talks about changing up the frequencies. What are the current planned frequency allocations of the satellites?
I am particularly interested whether any part of Starlink will be transmitting between 9.8 and 11.4 GHz, as I have a receiver that operates in that range.
SpaceX is submitting a proposal that will be discussed in the upcoming FCC open commission meeting in November that is focused on the 2nd group of Starlink satellites (not the earlier group of roughly 3k satellites... this is for the next 7k satellites). The proposal motion before the FCC can be found here:
https://docs.fcc.gov/public/attachments/DOC-354775A1.pdf
The frequencies being requested by SpaceX involve the "V-band", which is very high frequency microwaves (not VHF... that is a completely different radio band) that are above the "K-band" in the spectrum (frequently used by satellites). This is important because it sort of sets a marker on the bandwidth of individual terminals with ground stations and the aspirations for what SpaceX plans on accomplishing in terms of total data throughput of the constellation. See also the Shannon-Hartley Theorem for why this is important.
This proposal, in addition to specifying explicitly frequencies for the Ground to Satellite links that Starlink will be permitted to operate in, it also explains some geometry limits to the Starlink transmitters (they won't be able to transmit below 35 degrees from the horizon) and expresses a concern that potentially NASA weather satellite data might have some interference with Starlink data transmissions.
Some additional details of the feud between One Web and SpaceX are also included in this document, with some interesting rebuttals by SpaceX to questions raised by One Web. A whole lot of interesting specific details about Starlink can be gleaned from this document that I haven't seen elsewhere before.
If I might be speculating here, once this gets approved it could indicate some major moves by SpaceX in the next few months with Starlink, especially with the loan application that was just announced. I can't think that is a coincidence with this application.
P.S. Thanks to /u/TheCoolBrit for submitting this piece on the lounge that caused me to look up this document.
Sorry for a non-amateur radio question.
Is there any international HF frequency allocation for NGOs such as the Red Cross for phone usage? I looked at the charts but nothing jumped out at me.
If an organization like that wanted to communicate with itself over long distances, how would it go about getting licensed for that?
In Australia when you ask for a repeater licence, you need to have a "Spectrum Assigner" check that it doesn't interfere with other services.
That appears to mean these intermod calculations:
+/-n * f1 +/-m * f2
With: n, m = 0, 1, 2, 3, ... And: f1 < f2
I'm not quite sure what f1 and f2 would be in the context of a beacon, but I'm guessing that they're the input and output frequencies for a repeater?
Also, not sure what the very low numbers mean in relation to the assessment, or are all existing services on any "related" frequency X km excluded?
Is X the same for each variation?
Does line of sight change anything?
Are there any other such "Spectrum Assigner" steps, or is that the sum total of the job?
Edit: Added intermod and implied questions. Edit 2: Removed harmonics, since they appear to be covered by n, m = 1
Introduced: Sponsor: Rep. Doris Matsui [D-CA6]
This bill was referred to the House Committee on Energy and Commerce which will consider it before sending it to the House floor for consideration.
Rep. Doris Matsui [D-CA6] is a member of the committee.
Can anyone speak to the frequency allocations between OneWeb, Starlink, and Project Kuiper (do they even have an allocation?) I'm curious as to which allocations are better / more valuable / more usable / less restrictions among those?
Hey guys,
So lately, I've been very much into the idea of ensuring my instruments in my beats all are allocated to their own frequency range for clarity, but I'm somewhat new to the concept. My question is that I'm currently working on a beat where the guitar has a frequency at around 1500 khz that sounds great when boosted, but so does the snare. On the guitar, anything above or below that frequency doesn't resonate as well as this particular frequency, same with the snare. I know the answer is "if it sounds good, do it," but I'm looking for a little input from more experienced producers than myself here. In this type of instance, how would you handle this? Would you pan the guitar so it's not interfering with the snare even though its boosted around the same frequency? would you simply not boost one of the instruments and let one dominate the frequency range? I'm not looking necessarily for THE answer, just ways of approaching this while keeping the whole "creating space in a mix" mentality. Any input here would be greatly appreciated.
I've been debating myself over the re-balancing question for months now, but I can't seem to come to a proper conclusion.
I have a Roth IRA in Vanguard exclusively made up of Vanguard ETFs. This gives me two clear advantages: 1) All trades are free, 2) Rock bottom maintenance fees.
I have been trying to reconcile JL Collin's advice with what I personally witness in my accounts. He advocates a simple total market investment with a bond buffer. Just the two ETFs in my case. Traditional advice would say that diversity is good, and you can take advantage of arbitrage annually/semiannually through re-balancing. Personally, I've noticed that my high dividend and REIT holdings seem to be weakly/negatively correlated with my S&P 500 holdings.
My question is, given that I pay no taxes or trade fees in my account, can very frequent (weekly, or even daily) re-balancing hurt my performance? The analyses I've read show that there is little difference, but always mention trade fees, which don't apply in this case.
I have a feeling that, with weekly or daily re-balancing, I might be able to eek out a maybe a quarter or half a point over breakfast every morning.
EDIT: Thanks all. I'll just stick to a 5% rebalance trigger.
I've heard that some of my Shure and Sennheiser mics will no longer work once the FCC auctions off the frequencies they use. I can't find anything definitive on this. Thoughts?
Whilst trawling the FCC website, I happened upon this summary of licences issued that includes a mention of SpaceX:
> SPACE EXPLORATION TECHNOLOGIES CORP. WI2XOG 0096-EX-CN-2016 > New experimental to operate in 9300-9500 MHz to deploy an ocean > surveillance system to verify boats and ships are not at excessive risk > from a launch. > Fixed: Cape Canaveral and Kennedy Space Center (Brevard), FL
Not sure I'd heard of this experiment at detecting Wayward Boat before. I assume it's part of reducing their reliance on DoD range assets?
