Telecast DiamondBack 2 Manuel utilisateur
DiamondBack 2™
8-Channel Video Multiplexer
Instruction Manual
Telecast Fiber Systems, Inc.
102 Grove Street
Worcester, MA 01605
Tel: 508-754-4858
Fax: 508-752-1520
www.telecast-fiber.com
2
Diamondback2 Trransmitter, rear and front views
Diamondback2 Receiver, rear and front views
3
Table of Contents
Laser Safety 5
FCC Part A Manual Notice 5
Warning CE 5
Introduction 6
Setup 6
Packing List 6
Attaching the Rack Ears 7
Line Power 7
Configuring Signal I/O 8
Rear Panel Connections 8
Front Panel Indicators and Controls 9
System Examples 10
Fiber Optic Cable Runs 11
Making the Fiber Connection 12
Powering Up 12
Powering Down 12
Optical Transmitter Losses 13
Preventive Maintenance 13
Battery Pack 13
Repair 13
Accessory List 13
Troubleshooting 14
Operating Characteristics 15
Warranty 16
4
List of Figures
Figure 1. Installing the Rack Mount Adapters 7
Figure 2. Diamondback Rear Panels 8
Figure 3. Front Panels, RX (Upper) &TX (Lower) 9
Figure 4. DiamondBack2/Adder 161 Network 10
Figure 5. DiamondBack2/Adder 882i Network 11
List of Tables
Table 1. Power XLR pin-out 8
Table 2. Optical Loss Margin 13
Table 3. Troubleshooting Chart 14
5
Laser Safety
WARNING! Class 1 laser. Do not look into a fiber port or connector.
Laser Radiation
This TX unit contains a CDRH Class 1 laser device. Although this means it is eye
safe, you must avoid looking directly at, or staring into, the laser bean located on
an optical connector or on the end of a fiber.
Infrared radiation is produced at the fiber connection port on the rear of the TX
unit and at the end of any unterminated optical fibers that are attached to this
port. Avoid any direct exposure to the light that comes from these sources.
Do not power up the unit when no fiber is attached to the fiber port.
There are no user adjustments inside the Diamondback2. Do not attempt any
type of service to this instrument other than any as instructed this manual. Refer
all servicing to Telecast Fiber, Inc.
FCC Part A Manual Notice
This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to part 15 of the FCC rules. These limits are designed to
provide reasonable protection against harmful interference when the equipment
is operated in a commercial environment. This equipment generates, uses and
can radiate radio frequency (RF) energy and, if not installed and used in
accordance with this instruction manual, may cause harmful interference to radio
communications.
Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct such interference at
their own expense.
WARNING CE
This is a Class A product. In a domestic environment this product may cause
radio interference.
6
Introduction
The Telecast DiamondBack2™ system consists of a dual optical output fiber
optic transmitter/multiplexer (TX) and a mating receiver/demultiplexer (RX). The
TX unit multiplexes and launches simultaneously onto the fiber up to eight
NTSC/PAL/SECAM video signal channels plus a ninth auxiliary port for
compatible data use only. The compatible devices include the Telecast Adder™
161 and Adder™ 882i, which mux audio and data/switch or intercom and
data/switch information onto a coax to the BNC input on the DiamondBack2 TX.
Within a DiamondBack2 TX, the video signals are first digitized at 23.04 Mb/sec x
10 bits and then multiplexed at a data clock rate of 2.488 Gb/s. This digital data
is converted to an optical signal and launched into the fiber. The DiamondBack
RX receives the optical transmission and restores the video and data signals to
the corresponding output ports.
The DiamondBack2 TX is optionally equipped with two parallel laser outputs for
redundancy or split feeds. In redundant operation, the DiamondBack RX accepts
two optical inputs, with automatic switchover protection.
The DiamondBack2 TX and RX units have similar appearances; front and rear
views are shown in the photo on the opposite page. Front panel indicators for
channel and system status are very similar, and the locations of the electrical I/O
connections on the rear panels are identical.
A rotary switch and BNC output on both TX and RX front panels enables the
selection of one of the eight video signal channels for display on a local monitor.
An internal Ni-Cad battery provides backup in the event of line power loss.
DiamondBack2’s are housed in a standard 19 inch electronics rack.
Setup
The DiamondBack system consists of:
• One DiamondBack2 TX Transmitter
• One DiamondBack2 RX Receiver
• Two external power supplies (AC/DC adapters)
• Rack mount adapter kits (ears)
7
After unpacking, inspect the units for mechanical damage, and all electrical
connectors for bent or damaged pins and latches. Report any damage to the
carrier and to Telecast Fiber Systems, Inc.
Leave the protective caps on the optical connectors until it is time to attach the
fiber to the units. Replace the caps whenever the fiber is disconnected.
Attaching the Rack Mount Adapters
Units are shipped ready for rack use. Each adapter is held in place by two #10
flat head screws; see Figure 1.
Figure 1: Installing the Rack Mount Adapters
Place each unit in its intended location before attaching any cables or wires to
prevent accidental damage to the cables or their connectors.
Line Power
Any power supply used with the DiamondBack 2 must provide a minimum of 1.5
amperes, continuous, at 12 to 24 VDC. Although the units will operate at 12
VDC, 13.8 VDC is required to charge the internal UPS battery. This battery
charges whenever the input voltage is 13.8 VDC or higher. Full charge takes
approximately 16 hours.
Power input is through a 4-pin XLR connector located on the left side of the rear
panel; see Table 1 for pinout and Figure 2 for location. Be sure that AC outlets
are within reach of their 6-foot power cords.
8
PIN
SIGNAL
1
Ground
2
No Connection
3
No Connection
4
+12 –to 24 VDC
Table 1: Power XLR Pin-out
Figure 2: Rear Panel Connections
Configuring Signal I/O
Rear Panel Connections
All setups and connections are on the rear panel, which is basically the same for
the TX and RX units; see Figure 2.
The rear panel has 16 BNC female connectors for video and a 17th BNC for
Adder Data. From left to right in Figure 2, they are:
Fiber In/Outputs Depending on configuration, there will be one or two ST type
bulkhead connectors for singlemode ST type fibers.
Video In/Ouputs TX & RX. Chan 8 to Chan 1 are the video inputs on the TX
and the corresponding channel outputs on the RX. Each
input or output has an additional looped input or output.
These loops are self-terminating 75 Ohm.
Front Panel Indicators and Controls
The front panels of the RX and TX are shown on the next page in Figure 3.
9
Figure 3: Front Panels, TX (Upper) and RX (Lower)
Monitor On both RX & TX. A rotary switch to select one of the eight video
channels for output to the adjacent BNC. A standard composite
video monitor can be connected here. This is full broadcast quality.
Video TX (signal input) and RX (signal output). LEDs, one per signal
channel, which illuminate green when a video sync pulse or a data
stream is present. These LEDs will flicker when unsynchronized
video (e.g., RGB) is present.
Fiber 1/2 RX only. Includes the following:
Active: LEDs which indicate the fiber being used
to communicate with the transmitter.
Status: LED which illuminates green if the system has valid
optical data. RED when there is no optical power.
Select: A push-button that toggles between the two fiber
inputs. The default on power up is always Fiber 1, if
the TX is already activated. This button also resets
the alarm.
Power External: LED which illuminates green when 12 to 24 VDC of
external power is supplied to the unit.
Internal: LED which illuminates green after approximately 30
minutes of battery charging, and illuminates red when
external voltage is absent and battery is discharging.
Aud Data In TX only. LED which illuminates green when there is data present
on the auxiliary input BNC.
Alarm TX Alarm, An intermittent beep will sound when the alarm switch is
on and the system is being powered by the internal battery backup.
The alarm will stop automatically if external power is restored.
10
RX Alarm: For power monitoring conditions, the RX alarm functions
the same as the TX alarm. For fiber switching situations, the alarm
will continue to sound even if the optical signal is restored,
indicating to the user the type of malfunction that has occurred. The
RX alarm must be manually reset with the SELECT/RESET button.
System Examples
The combination of Telecast’s DiamondBack video multiplexer and Telecast’s
Adder 161 Audio/Data multiplexer or Adder 882i intercom/Data multiplexer
provides a powerful network solution for carrying audio, video and data
economically from point to point. The Aux Input on the DiamondBack TX is
intended for a coaxial connection to the Adder 161 or 882i.
An example of the use of the DiamondBack and the Adder 161 is shown in
Figure 4. The Adder 161 can multiplex up to 16 channels of audio, 2 streams of
digital data, and 4 switch closures for delivery on its coaxial output to the
DiamondBack TX.
Figure 4: Example of the DiamondBack/Adder 161 Network
Figure 5 shows the use of bi-directional Diamondback2’s with the Adder 882i.
This will provide for up to ten 4-wire circuits or 2 4-wire circuits PLUS 4 dual
channel RTS signals or 8 single channel ClearCom signals.
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