Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C
Broadcast Microwave Services, Inc.
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A switchable (on/off) and adjustable (0-10VDC) DC voltage bias is supplied on the center pin of the connector to
power the amplifier in the GPS antenna. The DC bias voltage is adjustable during the HC4 set-up operation.
5.4.9 Data Wayside Input
J4 is a multi-pin connector for interfacing data to be transmitted with the video transport stream. The data wayside
interface is RS-232 from between 1.2 to 115 kb/s.
5.4.10 KLV Data
J4 has a second channel for KLV data transmission. The interface is RS-232 from between 1.2 to 115 kb/s.
5.4.11 Auxiliary Data
J4 offers an auxiliary data interface for RS-232 data for speeds from 1.2 to 115 kb/s.
5.4.12 Ethernet
Field installation of the connector is difficult so no standalone mating connector is available. Instead, a 10-meter M12
to RJ45 cable assembly is available that may be used as-is or cut to length and re-terminated as required.
Ordering information for the cable;
P/N 610000411 Cable Assembly, M12 Male to RJ45 plug, 4 Pin Ethernet, 10m (32.8 FT)
Contact the factory for price and availability.
J3 is associated with two LED’s on the lower right of the HC4 labeled SPEED and LINK. The LED’s mirror those found
on a standard RJ45 LAN port and indicate the following;
SPEED
Yellow LED:
ON=100BaseT
OFF=10BaseT
LINK
Green LED:
Flashing=Valid Ethernet Link
Off=NO Valid Ethernet Link
The Ethernet port can be used for command and control of the HC4 in a standard LAN configuration. This may be
desired where the mission hardware must be controlled from a central operator’s console running a custom PC
application. A detailed discussion for this configuration is beyond the scope of this document. BMS will provide
instructions, a command set, and reasonable support to any customer desiring this type of control ability.
In addition to Ethernet for command and control, an extension of the Ethernet port capabilities includes routing and
data streaming capabilities in a unidirectional fashion. The HC-4 is interfaced to a local area network in the aircraft.
The HC-4 can then be either controlled via the network interface, or forward unidirectional IP packets such as UDP
over the radio link, or receive a data payload from an IP packet (either TCP or UDP) and convert that data into a
format to be sent in the MPEG transport stream. A companion receiver (like the BMS SPRITE-PRO Series) recovers
the packets and ports them out of an Ethernet connection.
5.4.13 USB
J13 is a standard USB 2.0 type A jack. It is normally left open and is used for software updates to the HC4. The jack
accepts a USB drive or may be connected to a PC via a commonly available USB cable.
5.4.14 ARINC
J8 <Reserved for future use>
5.4.15 Control
J7 provides interconnection between the DLC50 control panel and HC4 transmitter.
