Edgetech STARMUX III, User Hardware Manual

Page: 25 / 34

4-1
4.0: TECHNICAL DESCRIPTION
This section provides an overall general description of the hardware elements of the STARMUX III
DIGITAL LINK. This information, which includes block diagrams, board descriptions, chassis photos,
component callouts, and wiring diagrams, can be useful for troubleshooting purposes and installing
optional equipment.
4.1 Internal Components
A block diagram of the STARMUX III Digital Telemetry Link electronics is shown in F
IGURE
4-2 . The wiring
diagram is shown in F
IGURE
4-3 , and the electronics chassis is shown in F
IGURE
4-1. The main hardware
elements in the 2000 Digital Telemetry Link include the following components and circuit boards:
Sea Cable Interface The Sea Cable Interface consists of the Sea Cable connector (P2
on rear panel of STARMUX III) and a common mode choke. The
common mode choke is connected in series between the FSIU
(J6) and the Sea Connector on the rear panel (P2).
12 VDC Power Supply The 12 VDC Power Supply (PS2) receives AC power from the
Power Entry module to ge12 VDC which is used to power
the ADSL Modem.
375 VDC Power Supply The 375 VDC Power Supply (PS1) receives AC power from the
Power Entry module to ge375 VDC. The 375 VDC Power
is output to the FSIU. The PS1 Power Supply also provides a 24
VDC power output to power the digital and analog circuits
located within the FSIU.
Power Entry The Power Entry module filters the AC power and connects it to
the +12 and 375 VDC Power Supply through the front panel
power switch.
ADSL Modem The ADSL Modem board converts the uplink data ADSL signals
received from the tow vehicle and input on the ADSL connector
from the FSIU into Ethernet 10/100/1000BaseT signals which are
output to the 4200/2000 Topside Processor. Similarly, the ADSL
Modem
board converts the downlink Ethernet
10/100/1000BaseT based command signals from the 4200/2000
Topside Processor into the ADSL downlink command signals
which are output on the ADSL connector to the FSIU for
transmission to the tow vehicle thru the Sea Cable Interface
(FSIC) . The ADSL Modem also provides the status for power