setting w ill d epend o n y our e xternal
hardware ( Block U pconverter), a nd
may d iffer f rom t he v alue s et i n
here.
2.6
Read O nly - D VB M odulator o utput
Frequency
frequency
2.7
Allows t he o perator t o c onfigure t he
Power
output p ower o f t he m ain R F o utput
port. T he m onitor o utput p ower l evel
for t he E N-210 I F a nd L -Band i s
fixed a t - 45dBm. P ower i s d efined a s
the c omposite p ower r eferenced t o
an u n-modulated ( Pure C arrier)
carrier.
2.8
The S pectrum I nversion o ptions a re
Spectrum
either N ormal o r I nvert. I f N ormal i s
Inversion
selected, t hen s pectrum i nversion
does n ot o ccur. S pectral i nversion
can o ccur w hen e ither t he b aseband
signal i s u p-converted t o a n I F
frequency o r w hen t he I F i s
upconverted t o t he d esired R F
output f requency.
2.9
When o perating i n D VB-S2, t he
FEC F rame
Frame T ype o ptions a re e ither
Normal o r S hort. T he N ormal
64,800-bit F EC f rame p rovides
better p rotection b ut i ntroduces
more l atency c ompared t o t he S hort
16,200-bit F EC f rame. T herefore, t he
Short F EC f rame t ype s hould b e
selected i n a pplications w here
latency i s c ritical a nd t he l onger
frame t ype s hould b e u sed t o
optimize p rotection.
2.10
The R olloff s election w ill d etermine
Rolloff
the s hape o f t he o utput f ilter. T he
occupied b andwidth o f t he
modulated s ignal i s t he s ymbol r ate
multiplied b y ( 1+α) w here a lpha ( α)
is t he r olloff f actor. B y u sing a l ower
alpha, c arriers c an b e s paced c loser
together o n a g iven t ransponder o r
an i ncreased s ymbol r ate c an b e
The m onitor o utput f requency f or
the E N-210 I F i s f ixed a t 1 .080GHz.
The m onitor o utput f requency f or
the E N-XX L -Band t racks w ith t he
main R F o utput f requency.
-35 t o + 5dBm L BAND
-30 t o + 5dBm I F
Invert
Normal
Short
Normal
5
10
15
20
25
30