monitor output frequency for the
EN-XX L-Band tracks with the main
RF output frequency.
2.7
Power
Allows the operator to configure
the output power of the main RF
output port. The monitor output
power level for the EN-200 IF and
L-Band is fixed at -45dBm. Power
is defined as the composite power
referenced to an un-modulated
(Pure Carrier) carrier.
-35 to +5dBm LBAND
-30 to +5dBm IF
2.8
Spectrum
Inversion
The Spectrum Inversion options
are either Normal or Invert. If
Normal is selected, then spectrum
inversion does not occur. Spectral
inversion can occur when either the
baseband signal is up-converted to
an IF frequency or when the IF is
upconverted to the desired RF
output frequency.
Invert
Normal
2.9
FEC Frame
When operating in DVB-S2, the
Frame Type options are either
Normal or Short. The Normal
64,800-bit FEC frame provides
better protection but introduces
more latency compared to the
Short 16,200-bit FEC frame.
Therefore, the Short FEC frame
type should be selected in
applications where latency is
critical and the longer frame type
should be used to optimize
protection.
Short
Normal
2.10
Rolloff
The Rolloff selection will determine
the shape of the output filter. The
occupied bandwidth of the
modulated signal is the symbol
rate multiplied by (1+α) where
alpha (α) is the rolloff factor. By
using a lower alpha, carriers can be
spaced closer together on a given
transponder or an increased
symbol rate can be realized for a
given bandwidth.
5
10
15
20
25
30
2.11
Pilot
When operating in DVB-S2, the
Pilot options are either ON or OFF.
When pilots are enabled, the total
On
Off
