Chapter 1 • Introduction
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1038056-0001 Revision A
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An optional rack mount kit is available for the HX260, which
allows the unit to be installed in an industry standard 19" (0.45 m)
rack.
HX260 features
The HX260 includes the following features.
"
Multi-star mesh functionality
on page 3
"
DVB-S2 compliant outroute rates and ratios
on page 3
"
Transmission types
on page 4
"
Signal and data interfaces
on page 4
"
Mechanical
on page 5
Multi-star mesh
functionality
The multi-star mesh feature extends the HX system to support
direct, on demand, single satellite hop (as opposed to the standard
double hop via the hub) connectivity between sites.
The HX260 is capable of simultaneously receiving traffic from
both the hub and from other HX260 units. This is made possible
because the HX260 includes two types of receivers. The first is
the standard TDM receiver used to receive traffic from the hub
via a DVB-S2 outroute. The second type of receiver provides the
ability to receive one or more inbound TDMA channels, allowing
the HX260 to receive bursts transmitted by other HX260 units.
This makes it possible for the unit to support and process up to
four IPoS inroutes with an aggregate of 2 Msps.
DVB-S2 compliant outroute
rates and ratios
The HX260 receives a single DVB-S2 compliant outroute as
defined in Table 1.
Table 1: Outroute rates and ratios
Encap-
sulation
Signaling
Rates
FEC Mode
Modulation
Rate
BER/PER
Acquisi-
tion
(sec)
DVB-S2
1 – 4 Msps
(in 1 Msps
steps)
LDPC/BCH
Short and
Normal FEC
frame
• QPSK
!
!
• 8-PSK
• 1/2, 3/5, 2/3,
3/4, 4/5, 5/6,
8/9, 9/10**
• 3/5, 2/3, 3/4,
5/6, 8/9,
9/10**
QEF PER < 1E-7
10
DVB-S2
5-35 Msps
(in 1 Msps
steps)
LDPC/BCH
Short and
Normal FEC
frame
• QPSK
!
!
• 8-PSK
• 1/2, 3/5, 2/3,
3/4, 4/5, 5/6,
8/9, 9/10**
• 3/5, 2/3, 3/4,
5/6, 8/9,
9/10**
QEF PER < 1E-7
1
** 9/10 supported for Normal codeblock only.
