All the diffusion parameters of the coverage study are initially configured by default when selecting the service (technology) of the study, with appropriate or typical values ​​of the type of simulation to be performed. It is recommended, however, to be reviewed and specified by the user to adapt their simulation to the reality of the equipment to be simulated.

Broadcast parameters are only present when any of the following technologies are used within the category of sound and audiovisual broadcasting:

•FM

•DAB-T

•Analogue TV

•DVB-T

•DVB-H

•DVB-T2

Depending on the technology to be simulated, it will be necessary to configure different parameters.

FM PARAMETERS

For FM services in Xirio the broadcast parameters that can be configured are:

•System: Stereo, Mono or Mono mobile

•Maximum frequency deviation: 50 or 75 kHz

DAB-T PARAMETERS

For DAB-T services in Xirio the broadcast parameters that can be configured are:

•Reception type: Portable indoor or mobile terminal.

•Percentage of locations: 50%, 70%, 90%, 95% or 99%. The objective of percentage of locations considering the variations due to the occupation of the ground in the surrounding area.

•Sigma: Standard deviation of the field strength distribution for digital signals. The field level is considered to follow a log-normal distribution. It has a default value of 5.5 dB.

•Transmission mode: Mode I, Mode II, Mode III or Mode IV.

•Minimum field strength: Minimum signal level required for proper receiver operation. The "Minimum field strength" together with the "Sigma" and "Percentage of locations" parameters is used to automatically obtain the "Reception threshold" of the reception radio parameters by means of the button .

ANALOGUE TV PARAMETERS

For analogue TV services in Xirio the broadcast parameters that can be configured are:

•System: G, B, B1, D, D1, H, I, K, K1, L or M.

•Precision offset: Indicates whether there is a frequency offset or not.

•Color system: PAL, SECAM or NTSC.

•Offset:

•Offset type: None, Normal, Precision, Synchronized o Unspecified.

DVB-T PARAMETERS

For DVB-T services in Xirio the broadcast parameters that can be configured are:

•Reception type: Fixed, Portable outdoor, Portable indoor or Mobile terminal. This parameter determines standard cable loss, receiver height, gain and receiving antenna aperture values when calculating the Minimum field strength.

•Percentage of locations: 50%, 70%, 90%, 95% or 99%. The objective of percentage of locations considering the variations due to the occupation of the ground in the surrounding area.

•Sigma: Standard deviation of the field strength distribution for digital signals. The field level is considered to follow a log-normal distribution. It has a default value of 5.5 dB.

•Carriers: 2K or 8K.

•Guard interval: 1/32, 1/16, 1/8, or 1/4 of symbol interval. Used to avoid interference from delayed, echo or multi-path signals. During this time the echoes do not interfere with the information.

•Code rate: 1/2, 2/3, 3/4, 5/6 or 7/8.

•Channel modulation: QPSK, 16-QAM or 64-QAM.

•Minimum field strength: Minimum signal level required for proper receiver operation. The "Minimum field strength" together with the "Sigma" and "Percentage of locations" parameters is used to automatically obtain the "Reception threshold" of the reception radio parameters by means of the button .

DVB-T2 PARAMETERS

For DVB-T2 services in Xirio the broadcast parameters that can be configured are:

•Reception type: Fixed, Portable outdoor, Portable indoor, Mobile or Mobile indoor terminal. This parameter determines standard cable loss, receiver height, gain and receiving antenna aperture values when calculating the Minimum field strength.

•Percentage of locations: 50%, 70%, 90%, 95% or 99%. The objective of percentage of locations considering the variations due to the occupation of the ground in the surrounding area.

•Sigma: Standard deviation of the field strength distribution for digital signals. The field level is considered to follow a log-normal distribution. It has a default value of 5.5 dB.

•Carriers: 1K, 2K, 4K, 8K, 8Ke, 16K, 16Ke, 32K or 32Ke.

•Guard interval: 1/128, 1/32, 1/16, 19/256, 1/8, 19/128 or 1/4 of symbol interval. Used to avoid interference from delayed, echo or multi-path signals. During this time the echoes do not interfere with the information.

•Pilot pattern: PP1, PP2, PP3, PP4, PP5, PP6, PP7 or PP8.

•Code rate: 1/3, 2/5, 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 or 7/8.

•Channel modulation: QPSK, 16-QAM, 64-QAM or 256-QAM.

•Block length: 16200 or 64800 symbols by block.

•Implementation margin: Indicated by the manufacturer.

•Height losses environment: Urban, Suburban, Rural or No Losses. When using mapping with building information in the simulations, it is recommended to configure the No Losses option so that the height correction is not considered in the calculation of the Minimum required field strength or the reception threshold.

•Minimum field strength: Minimum signal level required for proper receiver operation. The "Minimum field strength" together with the "Sigma" and "Percentage of locations" parameters is used to automatically obtain the "Reception threshold" of the reception radio parameters by means of the button .

SNF PARAMETERS

For SFN services in Xirio the broadcast parameters that can be configured are:

•Windows start: Triggered by best server, Triggered by first pre-echo strong enough, Triggered by first pre-echo stable with sufficient strength. It establishes the origin of the signal with which the FFT window starts in the digital receiver, this signal thus imposes the reference symbol, from which the guard interval starts.

•MRMS: This margin applied to the signal level received from the best server, indicates the minimum signal level required for a pre-echo so that the receiver can synchronize with it.

•Guard interval: Used to avoid interference from delayed, echo or multi-path signals. During this time the echoes do not interfere with the information.

•Symbol interval: Duration of the OFDM symbol.

•Equalization interval: During the equalization interval it is considered that the signals can be correctly equalized and contribute constructively to the reception. This parameter includes the Guard Interval and depending on the technology can be extended by an extra time.

•MISO type (Múltiple Input Single Output). Available for DVB-T2. Two transmitters groups broadcat simultaneously two versions slightly different in time and frequency of the desired signal. In this way the system SNR improves and therefore network coverage and data rate also improve. This parameter models the type of channel used (Rice or Rayleigh).

•MISO group. Available for DVB-T2. It allows to tag each of them two groups of transmitters in the network that will emit the same signal slightly out of phase.

•Consider TFS gain (Time-Frequency Slicing). Available for DVB-T2. Several statistically multiplexed services are transmitted on more than one RF channel, providing additional gain.

•TFS gain. Available for DVB-T2. The gain to be used in the calculations when using TFS.