3 ms·
> LTE Band 53 is a part of the TDD (Time Division Duplex) LTE spectrum that requires only a single frequency band for both the uplink and downlink. LTE Band 53
by nickcw 4y ago
> LTE Band 53 is a part of the TDD (Time Division Duplex) LTE spectrum that requires only a single frequency band for both the uplink and downlink. LTE Band 53 has a frequency range from 2483.5 - 2495 MHz with a bandwidth of 11.5 MHz.
From: https://www.everythingrf.com/tech-resources/lte-bands/lte-band-53 https://www.everythingrf.com/tech-resources/lte-bands/lte-ba...
Quite impressive they can receive that on the satellite with 1W (guess) of power and a not very directional antenna in the iPhone.
- Jtsummers 4y agoIn the earlier videos on it they showed that the phone has to be pointed a certain way (which makes sense given the power constraints), but you are guided through the process. https://www.apple.com/newsroom/images/product/iphone/standard/Apple-Emergency-SOS-Connected_inline.jpg.large.jpg https://www.apple.com/newsroom/images/product/iphone/standar... - Shows the screen you'd see.