High-Rises Blocking TV Signal: Is Satellite-to-Digital-TV Conversion Worth It?

Buildings shadowed by nearby towers do not need a dish on every balcony. The building's shared TV system can receive channels from one satellite dish, convert them to terrestrial digital TV (DVB-T2) and feed them into the existing coax. Every DVB-T2 TV can watch without a set-top box.

Executive summary

Worth it when rooftop measurements from the terrestrial transmitter fail, even after upgrading antennas and amplifiers.
No rewiring: the existing riser, splitters and outlets are reused.
More than free-to-air: foreign channels and in-house channels (CCTV, notices) can be added.
Plan for C-Band: 5G interference and possible spectrum changes after 2029.

Options compared

Option	Best for	Limitation
UHF antenna + amplifier	Weak but measurable signal	Fails when heavily blocked
Satellite converted to DVB-T2 (SMATV)	Blocked buildings, extra channels	Headend investment
Residents install own dishes	Very small buildings	Cluttered facade, box in every room
IPTV / FTTR	Major renovation, hotels	New network investment

System components

Satellite dish (C-Band, typically 7.5 ft or larger for buildings; KU-Band smaller but sensitive to heavy rain)
LNB with 5G filter for C-Band
Transmodulator DVB-S/S2 to DVB-T2
Combiner and amplifiers
Existing riser and outlets, balanced to 65–75 dBµV

C-Band outlook

At its 21 October 2026 meeting the NBTC board had not settled spectrum allocation. One open question is whether C-Band (3700–4200 MHz) will be used for mobile by 2029; if sharing is not feasible, C-Band satellite users may need to move to KU-Band. New installations should allow for a KU-Band dish and dual-band transmodulators.