User guide

i RS-232 connections — The Remote RS-232 connections (see the
figure at right) allow the transmitter and receiver units to be configured
using SIS commands (see page ) or the FOX Extender Control Program
(see page 13).
The Over Fiber RS-232 connections (see the figure at right) allow
pass-through to remote units.
For more information see RS-232 Ports on page 12.
NOTE: Over fiber RS-232 communications are via a passive pass-through only; the
FOX Tx/Rx AV units neither generate nor respond to these signals.
j Alarm — When connected to an alarm, this 3.5 mm 2-pole captive screw
connector gives a warning when light signals have been disconnected, lost,
or broken.
See the note on page 5 for important information about preparing and
connecting wires to captive screw connectors.
The alarm pins, labeled 1 and 2, (see figure at right) on the rear panel of
the FOX Tx/Rx AV act as a short when activated. They do not produce any
discrete on or off voltage signals but act as an internal relay that either
connect or disconnect an external alarm circuit.
For the FOX Tx AV, the alarm state is activated when link 2 is absent. For the
FOX Rx AV, the alarm state is activated when link 1 is absent.
When power is lost, the alarm state is activated for both units.
k Fiber Optic Cable connector — An LC duplex SFP connector links the
transmitter and receiver. An LED above each port lights when a signal is
received. The optical Rx port of the receiver lights when a signal from fiber
link 1 reaches the receiver. The optical Rx port or the transmitter lights when a
signal from link 2 reaches the transmitter.
WARNING: The FOX Tx/Rx AV outputs continuous invisible light (Class
1 rated), which may be harmful and dangerous to the
eyes; use with caution. Do not look into the rear panel
fiber optic cable connectors or into the fiber optic cables
themselves. Plug the attached dust caps into the optical
transceivers when the fiber optic cable is unplugged.
Link 1 connects the Tx port of the transmitter and the Rx port of the receiver.
It carries video, audio and/or data output from the transmitter to the receiver.
Link 2 is optional. It connects the Tx port of the receiver with the Rx port of
the transmitter. It only carries the responses to RS-232 commands and is not
required for transmitting video and audio signals.
However, if link 2 is not enabled, the ability to configure the system through SIS
commands is limited by the lack of communication from the receiver to the transmitter.
All commands issued through the transmitter are valid but responses to status queries
may return invalid data.
Signals may be transmitted 2 km (6561 feet) over multimode (MM) fiber and 30 km
(18 miles) over singlemode fiber (see Operating distance Specs on page 24). An MM
transmitter must always be connected to a MM receiver and an SM transmitter can only
be connected to a SM receiver.
OVER FIBER REMOTE
RS-232
Tx Rx Tx Rx
OVER FIBER
T
x
R
x
OVER FIBER REMOTE
RS-232
Tx Rx Tx Rx
REM
O
T
E
R
S
-232
T
x
R
x
1 2
ALARM
RxTx
OPTICAL
RxTx
OPTICAL
FOX Tx AV
FOX Rx AV
FOX Tx/Rx AV • Panel Features and Connections 8