User's Manual

Table Of Contents
Table 3-1 Cable Shielding and Termination Specifications
Cable Function
Conductor Type
(
Typical)
Single
Point
Multiple
Point
Minimum Conductor
Coverage By Shield
Power Lines Single conductor, stranded N/A N/A N/A
Digital Control Twisted pair, stranded Yes 85%
Serial Data Twisted pair, stranded Yes 85%
Ethernet Data Twisted pair, stranded Yes 85%
ISDN Data Twisted pair, stranded Yes 85%
Discrete Lines Single conductor, stranded N/A N/A N/A
RF TX and RX Coaxial Yes 95%
Single Point: Ca
ble shield terminated at one end only via a connector or suitable crimp terminal.
Multiple Point: Cab
le shield terminated at both ends via a connector or suitable crimp terminal,
usually at both ends of the cable and at both sides of any production break.
N/A: Not
applicable.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
eNfusion® HSD-440 Mark 2 Terminal
23-15-30 3-5
3 JUN 10
To minimize Passive Intermodulation (PIM), the coaxial cable between the DLNA and
the
antenna must be double-shielded (braid and foil wrap) with gold-plated and soldered
(not crimped) connector contacts. Do not use nickel, nickel plating, or stainless steel.
B. Installation Wiring Notes
This section includes wiring notes and
connection details about strapping.
(1) Source/Destination Identification
Source/Destination Identification (SDI) is provided for the HPA as per ARINC 741
specifications. Pin
s marked 0 are left open-circuit and pins marked 1 are strapped
on the airframe side of the connector to the pin assigned as SDI Common (TP5D).
For this HGA application, strap pin TP5B (1) and leave TP5A (0) open.
NOTE: The logic for the SDI/WOW is explained in ARINC 741 Characteristic
Attachment 1-4, Note 19. The SDI/WOW logic in this case (where 0=open
and 1=strapped to common) is the reverse of the logic applied to all other
HSD-440 Mark 2 Terminal connectors, FWD ID, system configuration, and
data I/O configuration, where 0=strapped to common and 1=open.
(2) Maintenance Port Interface
The HSD-440 Mark 2 Terminal has an RS-232
maintenance port interface that
provides access to the MPU for data loading, system monitoring, and testing
purposes.
Access to the HSD-440 Mark 2 Terminal MPU is achie
ved by connecting an RS-232,
VT-100 terminal (computer operating a terminal emulation program) to the RS-232
maintenance port.