At the outset, it is worth noting that hotels/boardinghouses with (S)MATV systems based on headends will not pose problems with the number of rooms (outlets). The cost mostly depends on the number and arrangement of channels received from satellite transponders. A larger number of outlets is only connected with the need to purchase additional amplifiers that usually are a small percentage of the total cost of the system.
So, the choice of the content is the fundamental problem in creating an approximate calculation for this type of investment. Often, the investor has a difficulty with selecting the optimal list of channels, which is necessary for the cost estimate. We can suggest some strategies for hoteliers and installers interested in building/developing hotel TV systems. In this short guide we will also present examples of practical solutions of headends for reception and distribution of different numbers of channels intended for various kinds of guests.
So, the choice of the content is the fundamental problem in creating an approximate calculation for this type of investment. Often, the investor has a difficulty with selecting the optimal list of channels, which is necessary for the cost estimate. We can suggest some strategies for hoteliers and installers interested in building/developing hotel TV systems. In this short guide we will also present examples of practical solutions of headends for reception and distribution of different numbers of channels intended for various kinds of guests.
Distribution of digital terrestrial television (DVB-T)
Owners of newly built hotels and boardinghouses, equipping them with LCD televisions featuring built-in DVB-T tuners compliant with the broadcasting standard (e.g. MPEG-4), must only provide the antenna signal to outlets in rooms and other facilities. This can be achieved by using appropriate amplifier(s) depending on signal conditions and the number of the outlets.
Smaller hotels or boardinghouses located in areas with good reception conditions and needing ten, twenty or even more than fifty antenna outlets can be equipped with appropriate models of Telmor amplifiers.
From the installer's point of view, the most attractive proposal here will be TERRA's PA321TP R82513 or TERRA's PA420T R82516, with the ability to amplify as many as 20 DVB-T2 MUXes. Moreover, they also offer automatic equalization of signal levels for all channels regardless of their level at the input of the device (while maintaining the minimum required for correct signal quality) of respectively: 113dBμV (for 6 MUXes) – with this functionality, the installer does not have to worry about equalizing the levels of all signals at the input of the system. This means that it is possible to implement a system with a larger number of outlets (about 80, although this number depends on the type and types of passive elements and cabling used in the system) without using additional amplifiers. An alternative option to TERRA amplifiers can be the use of PROFINO Revolution 6711 R89062 amplifier from Johansson or WWK Alpha+ R89864 from Telmor.
Description and comparison of channel amplifiers used in TV systems.
Specifications | ||||
Model | PA321TP | PA420T | PROFINO 6711 | WWK ALPHA + |
Code | R82513 | R82516 | R89062 | R89064 |
No. of inputs | 3 | 4 | 4 | 6 |
Operating band | FM + 2 × VHF/UHF | FM + 2 × VHF/UHF + UHF | FM + VHF + 2 × UHF | FM + 3 × VHF/UHF +DAB/VHF/UHF+AUX |
Frequency range [MHz] | FM: 87...108 VHF/UHF: 174...240/470...694 | FM: 87...108 | FM: 88...108 VHF: 174...240 UHF: 470...694 | FM: 87.5...108 3 × VHF/UHF: 170...230/470...862 DAB/VHF/UHF: 170...230/470...862 AUX: 47...862 |
Preamplifier power supply ON/OFF | IN1 input: 12 VDC/100 mA | IN1 input: 12 VDC/100 mA IN2 input: 12 VDC/100 mA | DC 12 V or DC 24 V max: 100 mA (total) | 12 VDC/50 mA per input |
Gain [dB] | FM: 29 VHF/UHF: max 63 | FM: 29 VHF/UHF: max 63 | FM: 35 VHF/UHF: > 60 | FM: 35/25 DAB/VHF/UHF: > 70 AUX: 22/10 |
Number of supported filters/MUXes | max. 20 | max. 20 | max. 15 | max. 32 |
AGC function | 46 dB for each of the 20 filters | 46 dB for each of the 20 filters | In real time on all multiplexes | YES |
Selectivity [dB/1MHz] | > 30 | > 30 | 35 | 35 |
Converter function | NO | NO | YES | YES |
Configuration | TERRnet app | TERRnet app | Control by buttons + knob on the amplifier panel | Control by buttons on the amplifier panel |
RF output level [dBμV] | 90...113 for 6 MUXes | 90...113 for 6 MUXes | 90...107 for 6 MUXes | 98...118 (DIM 45004B) |
Power supply | Remote power supply via coaxial cable or from the included 12 VDC power supply | Built-in power supply | Built-in power supply | 12 VDC power supply included |
The following diagram shows an example system for digital terrestrial TV in the DVB-T2 standard.
For large facilities and when the facility (hotel, boarding house) is located in an area with poorer signal availability or the signal is interfered with, for example, by other transmitters, it is recommended to use a professional system based on TTX420 R81616 transmodulators from TERRA. The TTX-420 transmodulator, acting as a DVB-T/T2/C signal regenerator, improves signal quality. TTX-420 R81616 transmodulator is used when the error rate (high bit error rate BER and low modulation error rate MER) in the signal directly downstream of the antenna is high and the use of channel amplifiers or frequency converters proves ineffective and does not allow for distribution of the signal in a SMATV system. Such a problem occurs in areas with poor coverage of terrestrial TV signals. Due to high selectivity, the signal processed and amplified by the transmodulators provides a basis for building larger systems.
The components of a system based on Terra devices:
The diagram below shows an example system for terrestrial digital TV in the DVB-T2 standard using TTX420 R81616 transmodulator.