Edgetech STARMUX III, User Hardware Manual

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4-2 4.0: TECHNICAL DESCRIPTION
STARMUX III
0016903_REV_B
applied to the modem, status of the ADSL communication link
and the Ethernet LAN connection. +12 VDC power is input on the
DC connector from the +12 VDSC Power Supply.
FSIU The FSIU board mounts to the STARMUX III chassis. The FSIU
connects between the Sea Cable Interface (FSIC) and the ADSL
Modem in the STARMUX III chassis. The FSIU board 24
VDC on J3 from the PS1 (24VDC) output to power the digital and
analog circuitry. The FSIU board also inputs 375 VDC power from
PS1. The 375 VDC power is output to the tow vehicle on J6
combined with the frequency shift keyed (FSK) responder trigger
signal input from J1 and the ADSL downlink command and uplink
data signals from J9. The ADSL command signals are input and
the data signals are output on J9. The FSIU also provides the
current sense output (J7) and the Fish Power ON status output
(J4) which drives the Fish Power Indicator on the front Panel.