setting
will
depend
on
your
external
hardware
(Block
Upconverter),
and
may
differ
from
the
value
set
in
here.
2.6
Frequency
Read
Only
-
DVB
Modulator
output
frequency
The
monitor
output
frequency
for
the
EN-210
IF
is
fixed
at
1.080GHz.
The
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-210
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
5
10
15
20
25
30
