1. What is digital TV, and what are the differences among high definition television (HDTV), standard definition television (SDTV) and the conventional analogue television?
To have a full picture about the broadcasting methods and resolution of image on TV, please refer to the information provided by the Office of the Communications Authority (OFCA)
2. How do I tune my television set to Radio Television Hong Kong's (RTHK) digital terrestrial TV (DTT) channels?
Under normal circumstances, the DTT receivers (including the set-top boxes and the integrated digital televisions (iDTVs)) will be tuned to RTHK's DTT channels with the display of channel numbers after the "auto searching" function has been properly performed. In case of doubt, you should contact the retailers/suppliers concerned for enquiries.
3. What does building management need to do to receive RTHK Ch31-33?
To enable the occupants in the premises to receive RTHK's DTT services, communal aerial broadcast distribution (CABD) systems are required to be upgraded to include the receiving capability of Channel 62. For the technical details, please visit website of Office of the Communications Authority (OFCA): http://www.ofca.gov.hk/en/industry_focus/broadcasting/television_broadcasting/
4. How to find out whether my estate/building can pick up RTHK DTT signals?
Under normal circumstances, any estate/building that is within the coverage area of transmitting stations and has been able to receive DTT broadcast of other TV stations, is presumably capable to receive RTHK's signals. For the estimated coverage of DTT service, please visit the coverage area of RTHK's DTT web page and also refer to the following web page of OFCA:
5. What's the cost of upgrading and installing public antenna?
Charges by different contractors for the work on public antenna system vary. Costs may differ due to the size of the residential estate, number of floors of each building and complexity of the work. It is recommendable to obtain more than one quotation for evaluation. (In general, the cost for installing DTT system falls within the range of slightly over a thousand to tens of thousand dollars. The cost should include hardware like DTT antenna, mast amplifier, digital equalizer and digital power processing).
6. Could RTHK provide technical advice/support on receiving DTT?
Due to the limited resources of RTHK, we cannot provide comprehensive technical support. However, if you encounter any problems, you are most welcome to drop us a note so that we can take into account that for our future improvement in broadcasting quality.
7. My property management company has already installed and retuned the in-building CABD systems for DTT of RTHK, but the screen image is not clear. What is the reason?
The quality of reception of DTT signal also depends on the facilities and equipment within the domestic premises. Factors such as old-model set-top box, degenerated antenna cable or TV socket plate and multi-splitters would significantly weaken the signal. For useful technical information, please visit the following web page.
8. I used to be able to watch RTHK's DTT channels through our building's public antenna with good quality of picture. However, recently I found that the quality of the picture was not stable and pixelated images occurred. Is there anything wrong with RTHK's transmission?
RTHK's DTT signals have been broadcast within the parameters of the technical standards laid by OFCA. Our engineering department also carries regular field tests to detect any irregularities of signal transmission as well as continuously monitors the transmission. The unstable TV reception is mainly due to insufficient signal strength present at CABD System in a building, leading to poor signal quality. In a CABD System, after the television signals from off-air is received by the public antenna, the signals will be filtered, re-processed, re-combined, amplified and distributed over an in-building coaxial network. Both the signal strength and signal quality will be degraded and become unstable if there is no proper fine-tuning specifically to RTHK's off-air frequency channel and regular maintenance of the CABD System. It is recommended to report this incident to the building management office who should contact the public antenna contractor for investigation.
9. I am using standalone antenna and my area is under the coverage of transmission station, but why is the signal of RTHK's DTT weak while that of other TV stations are satisfactory?
TV households should note that the actual reception situation of a building or a house within the signal coverage area is susceptible to variations due to blockage and reflections of structures nearby, as well as other relevant environmental factors. The installation of the angle of the antenna may also affect the optimal quality of reception. It is advisable to seek the service of a qualified technician to adjust and reset the antenna installation.
10. Are Cable TV's subscribers able to watch RTHK's DTT channels?
To enable Cable TV's subscribers of those buildings that have already had their public antenna systems upgraded to smoothly receive RTHK's TV channels, RTHK has been working closely with Cable TV. By working out the technical issues and administrative arrangements, RTHK's DTT signals are directly fed to Cable TV's optical fibre system, and then, progressively the signals are transmitted to the residential estates which are currently connected to Cable TV. For the time being, most of the residential estates that are connected to Cable TV have already had their interconnection works finished. The Cable TV's subscribers in those residential estates will only need to perform an auto searching function then they will be able to watch RTHK's three DTT channels via common digital TV sets or digital TV set-top boxes.
11. How do Cable TV's subscribers know that their buildings can receive RTHK's TV channels?
If Cable TV's subscribers want to find out whether the address is able to watch RTHK TV Channels, please visit the following web page:
12. Is there any application requirement for using an IBCCDS channel for the delivery of RTHK's DTT service?
IBCCDS owners can decide on the number of and the exact IBCCDS channels to be used for the delivery of broadcasting, telecommunications and security services which reflect the preference and choice of the residents of the buildings. On the other hand, licensees of Satellite Master Antenna Television (SMATV) systems should seek prior approval from the OFCA for its use of IBCCDS channels in buildings. For more information about the use of IBCCDS channels, please visit the web page or contact the OFCA at 8102 4100 or in-bldg@ofca.gov.hk.
13. Why do tenants of the building need to bear the cost to upgrade the existing CABD system in order to receive the free TV?
For free TV service, users/tenants need not pay any fee to free-to-air TV broadcasters for receiving their free TV services directly picked up from off-air. On the other hand, CABD system is part of the building facilities usually owned by the Incorporated Owners (IOs) / BMOs for receiving and distributing TV broadcasting signals to building tenants. In this connection, in addition to maintenance fees for the normal operation of the CABD system, IOs/BMOs will need to upgrade their CABD systems at own cost in order to properly receive any new free TV service (such as RTHK's DTT service) from off-air and distribute it to the respective building tenants. The upgrade costs are usually paid by IOs/BMOs which will eventually be borne/shared by owners/tenants of the building concerned.
14. What are the contents on RTHK TV CH 33?
At present, RTHK TV Channel 33 relay the live feed of China Central Television Channel 1 (CCTV-1). All the broadcasting contents, including programme contents, transmission time, broadcast languages, bilingual broadcast and subtitles, are managed by China Central Television.

Contact Us

In case of any enquiry about the signals reception of RTHK DTT channels, please visit our DTT’s web page (http://rthk.hk/about/dtt/ways_e.htm) or contact us by phone at 3403 0431 or email to dtt@rthk.hk.

(Due to the considerable amount of incoming calls, not all the telephone inquiries will be attended by RTHK right away. Therefore, we greatly appreciate that you leave your contact details, so that we will get back to you as soon as possible.)

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