The TG1800D kit for larger buildings with above average height of ceilings
This kit includes a Yagi aerial upgrade for areas with very poor signal strength the stick antenna is replaced with the more sensitive and highly directional Yagi antennae.
The number of internal antennae can be increased but it is important for MobDev to see the building's plans before offering advice.
The TG1800DY Kit includes a highly directional Antennae, the 'LPDA' or Yagi' aerial, as it is fondly known. The TG1800DY kit is very suitable for larger houses and buildings of a rather more commercial nature. This unit tends to be used where the TX kits don't have quite enough power or versatility over which areas of the building truly need mobile connectivity. Because of the poor mobile signal even outside the building this kit utilizes the sensitive and highly directional LPDA or 'Yagi aerial which can pull in a signal from a mast quite a distance away. The kit is supplied with two internal dome antennae but this can be increased to as many as six re-transmission domes. Two are usually enough for quite a large building.
The elements in the picture are as follows.
Supplied are three fifteen-meter cables. The Yagi aerial is situated at the top of the picture and has a seven meter cable. The Yagi Antennae, located at the top of the picture, can be mounted on the same mast as a television aerial but in a commercial property an aerial installation contractor will mount the aerial and an electrician will probably do the rest. The importance of accurately positioning the directional aerial cannot be stressed enough. The whole effectiveness of the installation revolves around the correct fitting and directionality of the external antennae.
You need to find the position of the nearest transmission mast that provides the frequency appropriate to your mobile phone. . One way to do this is to go to www.sitefinder.ofcom.org.uk and this site will help you to find out where the closest suitable mast is located. The possession of a local Ordinance Survey map can often assist in this search. This transmission mast may be several miles away but accurate positioning of the external aerial, can often achieve good signal strength in places where even marching around the building with your phone fails to achieve a workable signal.
The TG1800 processor unit is blue and is at the bottom of the picture. The Yagi antenna is coupled to this with a seven meter cable and an adaptor where it goes into the processor. In this picture a fifteen meter cable is used to connect the processor to the junction box. The aforementioned junction box is the grey rectangular box with one connection in and two connectors going out. These have a pair of fifteen meter cables connecting to the two dome antennas. No adaptors apart from the external aerial adaptor are needed in this kit.
These dome aerials are best if fitted to the ceilings in an establishment owing to their transmission pattern, i.e. broad and wide but without huge depth. One way of installing them is in the floor space between ground floor and the next one up. Place them back to back, one facing upwards and the other downwards and you will have connectivity without seeing unsightly domes.
Most customers for these more complex kits will use their favourite electrician to install the system. This means that the wiring is kept very tidy. The main TG900 processor and the junction box are usually situated in the roof space. The Yagi antennae is plugged into The TG1800 processor where it is marked BTS. This is the end where the on/off switch is located together with the indicator light. The cable leading to the junction box plugs into the main processor unit at the port marked MS.
Ideally try to arrange things so that the TG1800 unit is placed where it can be got at easily with the external aerial socket facing you. This means that when everything is working smoothly and communication suddenly fails, it is easy to check whether the unit is switched on. The only time that this has happened to me is when a fuse had blown due to the same circuit being overloaded by the use of some major power tools.
If your technician has any problems, then call us on 01935 891046 and we will talk them through it. Do bear in mind that all mobile phone users in the building need to be using the same group of providers so as to achieve total connectivity for everyone.
