FAQ - Frequently asked questions
Frequently asked questions about our products
Do you have a question about one of our products? Take a look at our FAQ, you will often find the right answer here.
FAQ: easyDVBT >>>
For receiving DVBT on board you need the following hardware: your already available VHF-antenna, an „easyDVBT“ – a DVBT receiver (commercial) and a TV. Later you can complete the easyDVBT with an easySPLIT and easyAIS.
- Because of the higher frequented DVBT-channels (500 bis 860 MHz) have in the coax-cable a higher decay compared with the navy-radio-signal, it can be necessary to use a high quality, low-loss coax cable at higher cable lengths. Types of good coax cables are e.g. RG 213/U, AIRCELL 7, ECOFLEX 10. 2..
- Also a preferably uninterrupted transmission of the receiving signals from the antenna to the easyDVBT is only possible when you use the installed coaxialcable with together fitting coax plugs and jacks (.e.g coaxial deck-disconnection point)..
- In the easyDVBT the TV-Receiver-Signals will be separated (filtered), heightened and routed to the TV-receiver. This will be only successful, when an adequate high signal level is at the easyDVBT input. That means that the decay of the signals from the mast-top to the input of the easyDVBT has to kept small.
FAQ: easyDVBT >>>
This effect is not wrong, it is just the logic consequence of the unit.
Reason for that is the following. Imagine, that a VHF would “over the easyDVBT” directly transmit with 20W. The TV or the receiver would immediately be broken. Therefore the easyDVBT unit needs to disconnect all other connected units, (except the VHF Radio) in the moment when the VHF Radio is transmitting.
- How does the unit work: Normally a VHF antenna do not receive well the UHF frequencies of the television transmitters. But there is still a reception signal, even with the regular VHF antenna. What the easyDVBT does is, that it amplifies the UHF television signal so that the digital receiver can work with the signals. But to do so, it is necessary to get an “even small” UHF signal to the unit, to amplify it there.
- UHF attenuation of cables. The regular used VHF cables are of the type RG58. These cables do have a normal attenuation at the VHF frequencies of app. 140-160Mhz. But at the UHF frequencies for TV, up to 900 MHz the attenuation of these regular cables is very high, which means very poor signal transmission of these frequencies. Just to give you an idea: RG58 at 144MHz for 10 m cable: attenuation app. -1.9 dB RG58 at 900MHz for 10 m cable: attenuation app. -6,5 dB
- Poor transmission power of TV stations In some areas the coverage and the transmission power is not very good. This means that almost no signal is received.
Summary: To recveive a good TV signal out of the easyDVBT you need a good cabling, e.g. RG213 or Aircell 7 or Ecoflex 15 and good cable connections from the cable to the unit. Also the area where you are sailing is important, that there is enough “signal strength” to reveive TV signals.
B) Self oscillating of the amplifier In a very seldom, but possible case, the amplifier starts self oscillating in consequence of a critical impedance of the existing cable and the VHF antenna, which is very bad. To find a remedy, you can extend the cable by 1-2 meters. If this does not help, please ask us for a little electronic system which eliminates the oscillating, material No. B041.
C) Polarization of the TV transmitter from the TV stations VHF antennas are made to receive vertical polarized HF waves very good. This transmission of DVBT is the norm, for that reason everything should work fine. But we found out that some TV transmitters in the Baltic Sea stilldo work with horizontal polarization (as in the former years) and then the polarization might course technical difficulties. If you want to receive per horizontal polarized TV transmitter, please notice our self-developed “horizontal wave catcher” unit for the regular bar antenna (except of fibre glass antenna).
FAQ: easyDVBT >>>
Yes, the connection FM <=> antenna is always active even when the device is switched off as this is a basic security feature. This means the VHF radio installation can be used even when the easyDVB-T is switched off.
Horizontal radiations are bad received by the FM antennas, since the antennas are vertically aligned.
When you are often in areas where you receive horizontal signals, you will need a horizontal receiver on your UKW antenna. This begins by 3 horizontally mounted rods and receive horizontal field lines. It is simply put over your existing VHF antenna. However, it only works with Steel rods VHF antennas and not with plastic hard antennas.
The easyDVB-T is amplified the frequencies of 180 – 850 MHz.
DVB-T2 is using the frequencies of 470-690 MHz.
So you can answer this question with yes.
Your easyDVB-T is able to amplify the latest DVB-T2 signal.