What could this possibly be 890.400 - 890.600 mhz

[Dimmer_gamer]

These big blocks of this very distorted high pitched sound which I have seen across 600-890 mhz freaks me out in a way, and I have no clue as to what it is. My only possible guess is the tower behind my backyard, which is some internet or cell tower.

 

[nd5y]

What is your location? In the US one of the cellular bands is 869-894 MHz.

 

[davidgcet]

cellular is also in the 600-700 band along with digital public safety systems in the US

 

[kc2asb]

cellular is also in the 600-700 band along with digital public safety systems in the US

Wouldn't "big blocks" as described by the OP indicate cellular? Unless I'm mistaken, they are very wide bandwith signals.

 

[IC-R20]

Wouldn't "big blocks" as described by the OP indicate cellular? Unless I'm mistaken, they are very wide bandwith signals.

Indeed. Also I've yet to see 600 MHz public safety systems, but boy wouldn't that be fun!

 

[kc2asb]

Indeed. Also I've yet to see 600 MHz public safety systems, but boy wouldn't that be fun!

If public safety agencies switch to LTE based systems, wouldn't that get us there?

 

[wtp]

some of my radios when driving around towers go silent.
he does say the tower is behind his backyard, so even closer ?

 

[kc2asb]

These big blocks of this very distorted high pitched sound which I have seen across 600-890 mhz freaks me out in a way, and I have no clue as to what it is. My only possible guess is the tower behind my backyard, which is some internet or cell tower.

With any tower used for radio or cellular being that close, your radio might be overloading.

 

[davidgcet]

Indeed. Also I've yet to see 600 MHz public safety systems, but boy wouldn't that be fun!

i did not mean to imply they were in the 600, should have spelled it out and said certain parts of 700 have public safety. but yes if they use commercial LTE systems there is a good chance at least some of their traffic goes out on 600 depending on a particular carrier's setup. i don't think many US public safety use commercial LTE yet, but i really do not know on that.

 

[MTS2000des]

The only 600MHz band 71/N71 in the USA is T-Mobile. All 84MHz of it.

 

[davidgcet]

The only 600MHz band 71/N71 in the USA is T-Mobile. All 84MHz of it.

absolutely incorrect, the carrier i work for is NOT TMO and we have b71/n71 on a majority of our sites. TMO does have the biggest coverage in that band, but not exclusive. and actually they are on several sites where we are and both of us run it.

 

[IC-R20]

absolutely incorrect, the carrier i work for is NOT TMO and we have b71/n71 on a majority of our sites. TMO does have the biggest coverage in that band, but not exclusive. and actually they are on several sites where we are and both of us run it.

UScellular's wireless division has just been acquired by T Mobile last month so he's correct.

https://imgur.com/tuKaGyM

 

[davidgcet]

i do not work for TMO nor USCC and the company where i work has tons of b71/n71 in use. i know because i am one of the senior FST's and work on sites daily. so once again, NO TMO is not the sole exclusive owner of 600 mhz spectrum as he stated. they may have the largest holding, but not all of it.

 

[IC-R20]

i do not work for TMO nor USCC and the company where i work has tons of b71/n71 in use. i know because i am one of the senior FST's and work on sites daily. so once again, NO TMO is not the sole exclusive owner of 600 mhz spectrum as he stated. they may have the largest holding, but not all of it.

Nope. You're not getting off spewing fairytale nonsense like that without an actual company name to back it up and expecting anyone to take you seriously. Either prove it or be quiet at this point. Again, no other real carrier is licensed to operate and MVNOs are invalid.

 

[KD4TO]

This appears to have degraded to another urination competition.

 

[davidgcet]

i won't give names but if you look it up on the fcc site you will easily find it. not an MVNO, but a real full carrier with spectrum(and the physical infrastructure from the switches to the antennas) in most bands from 600 up thru MMwave. our b71 was in use for several years and has been being converted to n71 for a while now depending on particular cluster area needs. most of the sites i am primarily responsible for have b5 or n5, b12, b25 or n25, b41, and b71 or n71. not all carriers are the big 3, there are plenty of regional carriers that have the bands as well. again, no where near the channel size of the nationwide carriers but there are many more out there than people realize.

 

[kc2asb]

Well, that was interesting. In any case, we have not heard back from the OP as to what he is hearing - wideband cellular transmissions, overloaded receiver, etc. To be continued, maybe.

 

[Vargas2025]

These big blocks of this very distorted high pitched sound which I have seen across 600-890 mhz freaks me out in a way, and I have no clue as to what it is. My only possible guess is the tower behind my backyard, which is some internet or cell tower.

Yeah, I’ve seen that kind of interference before…..often shows up as wideband digital noise. Could definitely be from a nearby cell or microwave tower, especially if it’s constantly active. Those frequencies (600–890 MHz) are heavily used for LTE and 5G now. If it’s bleeding into your receiver, a high-gain directional antenna or some filtering might help narrow it down. Stay sharp out there!