KWS VAROS109, Manual, Page: 24 / 78

22 Chapter 06 – Measuring range
10911 V01.10
DVB-S (QPSK)
FEC MER (QEF) rounded values
1/2 5 dB
2/3 6 dB
3/4 7 dB
5/6 8 dB
7/8 9 dB
6.3 DVB-S2 mode
Use this mode to receive and measure QPSK/8PSK-modulated DVB-S2 signals.
DVB-S2 is a further development of DVB-S. In addition to QPSK a higher-quality modulation scheme (8PSK) has been
introduced. As an option, pilots can be transmitted to help the receiver synchronise when reception conditions are not
favourable. Furthermore, more efficient error protection (LDPC/BCH) increases bandwidth effectiveness (bit rate/band-
width at the same MER).
6.3.1 Symbol rate input
You must set the corresponding symbol rate before receiving a DVB-S2 signal. The device offers the operator ten preset
symbol rates for rapid input.
MODE > Symbol rate
opens the selection area for the five preset symbol rates. Use the
Up/Down
arrow keys to select
the required symbol rate. The new symbol rate is set when you press
ENTER
.
Press > to change the preset symbol rate between 2,000 kBd and 45,000 kBd (2,000—45,000 MSym/s). At tuning the
device tries out every symbol rate of this list until it is locked. To shorten this procedure you can use only the first five of
the list or all ten. You can choose between these options via the menu Used SRs (see above at DVB-S mode). This set-
ting is store in the non-volatile memory.