DXLink Fiber Input & Output Boards
143
Enova Digital Media Switchers - Hardware Reference Manual
Transceiver LEDs in Unidirectional Mode - Simplex (Default) or Duplex (Configurable)
FIG. 57 indicates the LEDs for the fiber optic transceivers on Simplex or Duplex Boards in Unidirectional Mode (also applies
to transceivers on DXLink Transmitter and Receiver units).
NOTE:
Only one transceiver LED, either the TX LED or the RX LED, will operate in Unidirectional Mode. The operational LED
illuminates on the side of the transceiver where data enters or leaves the hardware and indicates the individual port
where the fiber optic cable should be attached during cabling (see page 142).
Duplex Hardware Directional Mode Configuration
Directional Mode refers to the flow of signals and communication data withing the system. The following section applies
to DXLink Fiber, Duplex hardware and describes configuration of hardware for Bidirectional or Unidirectional Mode. The
instructions that follow require access to the DXLink Fiber, Duplex Board(s) and associated Transmitters/Receivers and a
terminal emulation program.
CAUTION:
In Data Link-lost Mode, the data return path is disconnected but both of the transceivers’ lasers are still active.
If left uncovered, transceiver lasers may constitute a health hazard. This hazard should be avoided by restoring
Bidirectional Mode (see page 144), configuring DXLink Fiber boards/units for Unidirectional Mode (see page 143), or
covering exposed lasers.
Hardware Configuration
When different pieces of DXLink Fiber, Duplex hardware are in different modes (e.g., a Transmitter in Bidirectional
Mode and an Input board in Unidirectional Mode) the entire run drops into Data Link-lost Mode until the hardware
is configured for matching modes.
The only way to configure DXLink Fiber, Duplex Transmitters and Receivers for Unidirectional Mode is to adjust the
setting of DIP switch #4 on the bottom of the unit. After setting the DIP switch (
ON
for Unidirectional Mode and
OFF
for Bidirectional Mode), power must be cycled to use in the enabled state.
When Duplex and Simplex hardware are connected to one another, the Duplex hardware will always operate in
Data Link-lost Mode until specifically set to Unidirectional Mode.
Setting a Duplex board connector’s configuration (to Unidirectional or Bidirectional Modes) persists between
power cycles and board swaps (i.e., a board with connectors set to Unidirectional Mode will persist these settings
when removed from its enclosure and added to another, while a new DXLink Fiber Board, Duplex placed in the
old board’s slot will not have any connectors set to Unidirectional Mode.
Configuring DXLink Duplex Hardware for Unidirectional Communication
The following directions assume that the Duplex hardware is in Bidirectional Mode. For hardware in Data Link-lost Mode,
you must return the hardware to Bidirectional Mode (restore the fiber optic cables that provide the data return path)
before beginning the instructions below.
If the data return path is disconnected while the system is configured for Bidirectional Mode, the system
automatically drops into Data Link-lost Mode.
Changing the enable state (ON or OFF) on any or all channels will cause the DXLink Fiber Board to undergo a reset
5 seconds after receiving the command for it to take effect.
A complete list of the DGX_SHELL targets, BCPUx, is in the "Product to Board Slot Correspondence" table on
Link Status LED
Signal Status LED
On
– Link status is active
Off
– No video is present
Blinking
– Unit in Data Link-lost Mode
Note: Data Link-lost Mode occurs when hardware
in Bidirectional Mode loses its return path.
On
(
solid
) – HDCP video is present
Off
– Link status is not active
Fast blink
– Unencrypted video is present
Slow blink
– Free-run video is present
FIG. 57
Fiber optic transceiver LEDs on DXLink Fiber, Simplex Board
Input Board – Data Transport LEDs
Output Board – Data Transport LEDs
• TX Off – Transceiver port is not operational
• TX On – Available for use; not sending data
• TX Blinking – Receiving data
• RX On (solid) – Available for use; not receiving data
• RX Off – Transceiver port is not operational
• Blinking – Receiving data
RX LED
TX LED
RX LED
TX LED
