DVB-T

Choose the mode of operation, either 2K or 8K mode.

Use 2K mode for single transmitter operation and for small single frequency networks with limited transmitter distances.

Use 8K mode both for single transmitter operation and for small and large single frequency networks.

DVB-T offers three different modulation schemes: QPSK, 16-QAM, and 64-QAM.

Lower order modulation formats like QPSK (Quadrature Phase Shift Keying) do not transmit as much data compared to higher modulation formats such as 64-QAM (Quadrature Amplitude Modulation), but they can be received when signal strengths are lower.

Note that as the QAM order increases, there is a higher possibility of introducing data errors since these schemes are less resilient to noise and interference.

Match the code rate to the requirements of the broadcast network. The higher the level of error correction that is applied, the greater the level of supporting error correction data that needs to be transmitted, which reduces the data rate of the transmission.

For example, if you select 2/3, for every 2 bits of data, you are sending out 3 bits, one of which is for error correction.

Choose the appropriate guard interval so that distinct transmissions do not interfere with each other.

In DVB-T, four guard intervals are available: 1/32 provides the lowest protection and the highest data rate, 1/4 results in the best protection but the lowest data rate.