User's Manual

SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
eNfusion® HSD-440 Mark 2 Terminal
23-15-30 3-6
3 JUN 10
The HSD-440 Mark 2 Terminal maintenance p
ort is available at the front of the
HSD-440 Mark 2 Terminal and at the rear ARINC 600 connector. Connection on the
front of the HSD-440 Mark 2 Terminal is accessible via a DB25S connector for local
maintenance of the terminal. Remote access is provided for cases where local access
is unavailable. For remote access, install an accessible DB9S connector in the cabin
area.
NOTE: The front panel and remote connections to the maintenance port cannot
operate simultaneously.
Refer to "Test and Fault Isolation" on page 4-35 for information on how to connect
and use the maintenance port, including equipment requirements, connection and
ca
bling requirements, software loading instructions, and configuration details.
(3) Antenna Subsystem RF
Interface
Several external RF parameters (such as cable losses and antenna gain) that must
b
e delimited to ensure proper operation dictate the HSD-440 Mark 2 Terminal
performance requirements.
Table 3-2 defines the RF parameters and their expected values.
Table 3-2 RF Parameters Definitions
Parameter Min. Value (dB) Max. Value (dB)
Antenna Gain 12 17
Antenna to DLNA Loss 0.3
DLNA Gain 53 60
DLNA Noise Figure 1.8
DLNA to HSD-440 Mark 2 Terminal (Rx) Loss 6 25
HSD-440 Mark 2 Terminal to Antenna (Tx) Loss 0
5 (including DLNA
los
s)
DLNA Insertion Loss (Tx to Antenna Port) – 0.8
(4) WOW Pins
The WOW1 and WOW2 pins are either left open circuit or connected to the airframe
DC gro
und through a ground proximity switch. The WOW Program Select (PGM) pin
is either left open circuit or connected to the Forward Address Common. The two
ground states for any pin are open and closed circuit.
Resolve any conflict between WOW1 and WOW2 by
assuming the aircraft is in-air.
The interpretation of the state of the WOW1 and WOW2 pins is defined by the state
of the WOW program select pin. Refer to Table 3-3 for details.