DTC Communications Inc. PD2TX100S Manuale Utente

Pagina di 24
DTC COMMUNICATIONS, INC.
12
PROGRAMMING
DVBT Service Name
DVB-T service name is a place to assign a name for the DVB-T configura-
tion. Press Apply to save the new name.
DVBT FEC Rate
DVB-T FEC rate selects forward error correction rates in the wideband
DVB-T modes. Options are 1/2, 2/3, and 3/4, with 1/2 giving best range
and 3/4 possibly giving better video quality under certain conditions,
recommended default is 1/2.
DVBT Guard Interval
DVB-T guard interval selects guard intervals in the wideband DVB-T
modes between 1/32 and 1/4. Use the smallest guard interval that will
allow reliable low error rate communications, this parameter may need to
be adjusted when the link is relocated; the recommended default is 1/16.
DVBT Modulation
DVB-T modulation selects the modulation used in the wideband DVB-T
mode. Modulations QPSK, 16QAM, or 64QAM can be selected. QPSK will
give best distance and in most cases very good video quality and low
latency.
DVBT Spectrum Inversion
DVB-T spectrum inversion allows flipping the modulated spectrum to
compensate for spectrum inversion that may take place on the receiver
side due to high side LO injection.
DVBT 4 KHz Offset
DVB-T 4 KHz offset is not normally used but might improve BER in cases
where the TX upconverter I/Q balance is poor.