DVB-T2 Configuration and Settings
R&S
®
SMCVB-K164
44
User Manual 1179.0974.02 ─ 02
"SFN"
In
mode, all transmitters in a network are tuned to the same fre-
quency and have frequency coupling (based on the 10
MHz refer-
ence output of a GPS receiver). In addition, it is necessary in an SFN
network to compensate any signal delays that occur in the program
data supply. This involves the use of a GPS receiver, see also
on page 43, and timestamps inserted into the T2-
MI transport stream. The maximum delay in the network is set on the
T2
gateway and represents the maximum delay which can occur in
the program data supply at the most remote transmitter in the net-
work.
If a timestamp was received at the SFN transmitter, its modulator
measures the dynamic delay regarding its own received seconds
pulse from the local GPS receiver. From this information, together
with the processing delay (of the modulator), the RF delay (from mod-
ulator to antenna) and the optional static delay, it computes the local
delay value which the supplied transport stream must undergo to
attain data synchronicity in the network. Note, that it is critical for the
incoming transport stream to be identical for all the transmitters in the
network, i.e. it may not be changed in any way.
See also
"MFN"
In
mode, there is no mandatory coupling between an individual
transmitter and the incoming transport stream (based on the seconds
pulse from a GPS receiver). In addition, the transmitters are not
synchronized with one another based on a common reference and
output frequency. You can select the modulation parameters of the
transmitters involved in the network. In addition, the incoming trans-
port stream can be adapted to the data rate requirements of the mod-
ulation parameter settings.
Remote command:
[:SOURce<hw>]:BB:T2DVb:NETWorkmode
Profile Mode ← Network Mode
Requires "Network Mode > SFN".
Sets the profile mode.
If the modulator operates in a multiple profile environment and is used to generate an
RF combined T2
base/T2
lite composite signal, can be used to mute P1FEF.
"Single"
Modulator operates in normal mode. P1FEF is generated according
to DVB-T2 specification
"Multi"
Modulator operates in multiple profile environment mode. P1FEF is
muted to allow T2
base/T2
lite signal overlay on RF level.
Remote command:
[:SOURce<hw>]:BB:T2DVb:PROFile
Transmission System
Editing the parameter requires "T2-MI Interface > Off".
Sets the transmission system.
"SISO"
transmission.
System Settings
