Comtech EF Data MDX420 SkyWire Manual - Manual (Page 18)

MDX420 SkyWire™ Satellite Network Gateway Introduction
MN-MDX420 Revision 6 1–2
1.2 MDX420 Simple Block Design
The MDX420 satellite gateway is based on a single signal processing printed circuit card designed with
one to four optional plug in burst demodulator daughter cards. The minimum configuration consists of a
single signal processing card and a single burst demodulator daughter card with the option to add three
additional burst demodulators for a total of four burst demodulators. The single signal processing printed
circuit board consists of an L-Band burst modulator, the Ethernet interface, and a digital baseband
processor.
Within a SkyWire TDMA satellite network, a gateway has the ability to communicate with up to 32 full
mesh remote sites in a single 1 RU chassis. All units at all locations are based on this single hardware
platform.
Each gateway supports:
 One burst Modulator (MOD)
 Up to four burst Demods (DEMOD)
 Network Control Module for distributed intelligence (NCM)
 All gateway IP data traffic passes through a common 10/100/1000 bridge interface.
 Optional BUC Power and 10Mhz Reference
Figure 1-2 MDX420 Block Design
Each gateway can:
 Transmit
one carrier
 Simultaneously receive four carriers that do not need to be of the same configuration.
 Support a distributed leaderless TDMA network, meaning that there is no HUB and no
single point of failure. The network administrator can log-in through any gateway in a
share group and change the network parameters of any gateway in the share group
MOD DEMOD 1 DEMOD 4 DEMOD 3 DEMOD 2
MDX420
10/100/1000 Switch
NCM