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Satellite Reception Digital


Digital Interference

The most common faults to digital satellite reception are caused from insufficient signal levels or impulse noise from electrical and mechanical devices. The result is that they cause satellite pictures to freeze and break up into small boxes, all of which can be subject to the following reasons:

What can be done?

  • Check that the satellite dish is correctly aligned to the satellite especially if the fault is apparent when it rains.

  • Check the physical condition of the satellite dish, ensuring it is not dented or damaged in any way. If it is replace the dish.

  • Check that the correct size of satellite dish is being used for its location use a solid dish as opposed to a mesh one for reception of weak satellites.

  • If the fault occurs where there is a long cable run between the satellite dish and receiver install a feeder cable which is subject to less signal loss. This will comprise of a larger cable constructed from a centre core of 1.25mm. Another alternative would be to install an in line amplifier, connected to the feeder cable and is powered from the satellite receiver.

  • If the fault has just occurred, check the dish has not moved and that there are no local obstructions such as building work; trees; etc. gone up or grown noticeably taller since the dish was installed. Ensure that there is a clear line of sight approximately 30 degrees upwards from the satellite dish position.

  • Check the signal quality by accessing the receivers menu, using a Sky digital receiver this can be accessed by selecting from your handset: Services; System set-up (4); press 'Select', 'Signal test' (6) and press 'Select'. Ensure that both the signal strength and signal quality cursor bars are reading more than half way. An adequate signal will then be displayed as 'Locked' and confirmed as ok.


Pattering effect displayed over the satellite picture

Inter-modulation patterning is the results of incorrect UHF channel spacing between off air TV signals and RF outputs of satellite receivers and videos that appear as wavy lines on the screen.

What can be done?

  • Ensure that all receivers are set using the correct spacing between channels, avoid allocating active channels + or - 1, 5, 9 channels away. To achieve this, adjustment of the equipments' modulator may be necessary. This can be adjusted by either mechanical trimmer screws at the rear of the equipment or electronically by accessing the equipments' menu and selecting the RF output settings and following the instructions.

  • To totally eliminate any possibility of inter-modulation patterning, use Scart leads to connect between the equipment. These are recommended as the best means of configuring receivers to deliver stereo sound and optimum picture quality.


Sky digital - loss of reception

Sudden loss of reception can be the result of Sky carrying out over the air downloads these can cause a variety of problems to Sky satellite receivers. The effect is that receivers will lose certain settings and services such as teletext and cause pictures to become permanently frozen on the screen.

What can be done?

  • To resolve the fault the Sky digital receiver will require re-booting, unplug the receiver from its 230 volt mains supply wait for one minute and then re-plug it back again. Once the red light is displayed on the front of the receiver wait 30 seconds before turning on.

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