User manual MyM DVB-3T , rev B eng
Page 10
8.2.2 Output channels
Use this menu to choose the output frequencies for the
MyM. After automatic installation you will find the preset
channels on VHF output at channels S11, S13 and S15
respectively. This menu allows you to choose between
VHF (S10 to S41) or UHF (E21 to E69) as output channels.
8.2.3 Quality
This menu is used to test the signal quality and the aerial
reception quality. It may be necessary to adjust or
upgrade the TV aerial to ensure good picture and sound on
all channels. For more information see Chapter 8.2.3.1
Reception.
The MyM has an inbuilt spectrum analyser to help optimise
the aerial installation. For more information see Chapter
8.2.3.2 Antenna Quality.
8.2.3.1 Reception
Use this menu to measure the reception quality of each
channel. If these are not optimal it is possible that the
picture and sound quality will deteriorate in poor
reception conditions and it may be necessary to adjust the
aerial. The information refers to the 2 installed muxes for
the 3 channels.
The menu shows the channels numbers and frequencies of
the 2 installed muxes. Good reception quality requires a
strong incoming signal. For more information on the optimal signal strength see
Chapter 8.2.3.2 Antenna Signal. It may be necessary to adjust the aerial for
optimal signal strength. The signal quality C/N (Carrier to Noise) value is a
measurement of the relationship between the aerial signal and disturbance in the
channel. This should be higher than 20 dB. The BER (Bit Error Rate) measures the
number of ratio of the number of faulty bits received to the total number of bits
received. The BER should be as low as possible and less than 2.00E-4 (2*10
-4
) to
ensure good quality picture and sound.
