Originally it was planned that splitter can also divide the frequencies for the GSM network. But during several tests it showed, that in fact the easySPLIT could do this, as calcutaled by the simulation, but the normal VHF-antenna does not cover the frequency band which is necessary for the GSM-network. Even by several technical experiments we did not receive a good result.Our quality standard, to offer good solutions, did not allow us to proceed with that variant. Because the tool for the box was already finished, the hole for the GMS branching was kept inside at the early beginnig with our 1st generation of products. An after-market additional accessory will not be available in the future.
The unit itself probably works well, but there are 3 different outside influences which could spoil the results from your easyDVBT:A) Cable quality and length The DVBT frequencies are received by a regular VHF antenna, but not in a sufficient quality to watch TV. What our unit is doing is to amplify the signal strength so that the digital receiver box can interpret the signals. But amplification only works, if there is a base level of signals at our easyDVBT. If the cable which is used or the transitions between the cable and the inside of the cabin is no good quality, we do not get any “amplifiable level of signal” into the easyDVBT. Proposal for a solution: Use of a good quality cable e.g. RG 213 or ecoflex 10. Attenuation of RG213 or Ecoflex 10 at 1000 MHz is around -2dB/10m which is an acceptable value. RG58 is very bad for TV frequencies: Attenuation of RG58 at 1000 MHz is -6,4dB/10m which is an enormous attenuation. Another important factor of the quality is the connector: The TV high frequencies lose signal strength if the transition into the cockpit is soldered too easy and not “by plugs and sockets”. You easy loose -3 to -4 dB if only soldered not in a very exact coaxial way.
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).