Community TV installations
Orienting an antenna in a community installation, I experience considerable bounce from the terrestrial signal and receive it with a great deal of distortion.
In this case, it is necessary to use a highly directional antenna (MX-075). And if even this fails, a simple trick is to turn the antenna a few degrees to the right or to the left in such a way that it no longer receives the bouncing signals.One final suggestion: you can choose to work with a digital terrestrial signal using a TO-511 (COFDM-PAL transmodulator). With this equipment, the digital signal is changed to analogue. Accordingly, it can be distributed in RF as if it were a genuine analogue signal.
What advantages does TTD hold over existing analogue TV?
Interference ?snow? and intermodulation are eliminated. The advantages of DVD are obtained: digital image quality, 16:9 format, 5.1 sound, Internet, email and SMS messaging.
I have a headend of monochannels installed in a cabinet. When I close the door of the cabinet, the television picture becomes so distorted that it is impossible to watch.
Because the connectors are not shielded, feedback is being produced in the amplifier, i.e. the signal coming from the amplifier it is radiated through the connector, so that part of the signal is fed back and joined with the antenna signal, with the result that eventually the amplifier is saturated.
In an installation I have a large run of coaxial cable and the line amplifier is unable sufficiently to equalise the roll-off.
By using an EQ-126 external fixed equaliser or an EQ-186, it is possible to compensate for the roll-off produced by the coaxial cable.
What is the correct order of installation of antennas on a mast?
For the wind load produced by the mast to be as little as possible, the antennas must be installed in descending order of size (i.e. the largest installed first, the smallest installed last) and from the bottom of the mast to the top. The distance between antennas should be 1m.For example: the BIII antenna would be installed on the lowest part of the mast, followed by the UHF, with the FM at the top.
What is the minimum level necessary in the outlet for an individual TTD receiver to function?
The CODFM is from 45 to 70 dBµV.