Full Text Searchable PDF User Manual
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
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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
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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.
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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)
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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.
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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 17
th
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.
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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.
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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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Figure 5: Example of the DiamondBack/Adder 161
Fiber Optic Cable Runs
The optical output from the TX is generated by an infrared laser diode that is
coupled to the fiber. User connections are made at a bulkhead ST type connector
on the rear panel; refer to Figure 2 on page 3. Operation is intended for use on
single mode fiber.
The input at the RX uses a InGaAs pin diode and amplifier to convert the optical
signal back into an electrical signal.
Never look directly into the end of a connected optical fiber while any component
is operating; eye damage is possible.
DiamondBack2 launches the signals into 8.3 micron diameter core single mode
fibers. Assembled cables and connectors are available from Telecast Fiber
Systems, Inc.
The Transmitter’s optical outputs Fiber 1 and Fiber 2 have the following
characteristics:
• Fully redundant
• Have independent power drivers
• Both remain active in the absence of a power or device failure
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The Receiver takes its signal selectively from Fiber 1. If the signal on Fiber 1 is
lost, the RX automatically switches to its Fiber 2 input. If the signal on Fiber 1 is
restored, and the signal on Fiber 2 is lost, the RX switches back to Fiber 1. If
both fibers remain active, pressing the Select button on the front panel will toggle
between them.
Making the Fiber Connection
Inspect the fiber ends and clean them with dry compressed air or with Kim-Wipes
that have been wet with pure isopropyl alcohol. Fingerprints or other dirt on the
optical connector end surfaces will reduce the received optical signal level.
Connect the fibers to their matching ports on both the TX and RX units.
Powering Up
Never move the power switch on the front panel without first disengaging its lock
by pulling on the switch lever.
With power off at both units, inspect the electrical and optical connections for
damage. Firmly seat and latch all connectors.
1. Pull the switch lever away from the front panel and up for power on.
2. Be sure to switch power on to the transmitter and receiver; the power
switches on both units must be on for the system to function normally.
Powering Down
Never disconnect the DC power input connector without first turning the power
switch lever off. Failure to do this will result in the discharge of the internal UPS
backup battery, affecting its integrity and lifetime.
Optical Transmitter Losses
The maximum fiber distance is defined by the optical loss operating margin. The
RX signal must be - 21 dBm or higher. Losses on single mode fiber are
approximately 0.5 dB/km or less. Refer to Table 1 for the expected TX output
requirement and the consequent RX input power.
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Optical Loss Margin
Signal Min
Unit
TX Optical Output
- 6*
dBm
RX Optical Input
- 21
dBm
Optical Loss Margin (Range)
+ 15 dB
Table 2: Optical Power and margins.
* Standard output, high-power versions available
Use an optical power meter for testing the optical signal development and its
transmission over the fiber. Instructions for this test are supplied with the meter.
Preventive Maintenance
Battery Pack
Replace the internal Ni-Cad battery pack every two years; perform the following
procedure:
1. Verify that power is off.
2. Open the top.
3. Cut the tie wraps holding the battery.
4. Replace the battery and tie wraps with the same or equivalent.
5. Reverse the procedure to reinstall the battery.
Repair
For assistance with your DiamondBack2 system, contact Telecast Fiber
Systems, Inc. at 508-754-4858. To return a unit for repair, you must obtain a
return material authorization (RMA) number from Telecast service.
Accessory List
The following accessories are available from Telecast:
• Optical power meter kit with wavelength filter
• Cable repair kit
• Loop-back cable to localize signals during installation test
• Replacement Ni-Cad battery pack
• Prefabricated cables built to custom lengths
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Troubleshooting
Symptoms
Possible Cause
Corrective Action
No operation, all
indicators are off.
Power switch is off or
the DC power source
is inactive
Turn on power switches to both units
Verify that the external power supply
is delivering13.8 and 24 VDC.
Internal LED off
Battery is depleted
and the power switch
is off
Turn on power switches to both units
Recharge the battery
Internal LED red
External power loss or
depletion of the
internal reserve
battery
Verify external power. The LED
Illuminates green after 30 minutes of
use with the AC power adapter. If the
light does not turn green, replace the
battery
No operation,
Status LED red,
fiber 1 LED and
fiber 2 LED
alternately
flashing
Optical
communication failure
or power to the TX is
off
Verify the following:
• TX power switch is in the on
position and the power indicator is
illuminated.
• Fibers are not broken/disconnected.
• Fiber end tips are clean.
• Optical connectors are properly
mated.
• Link loss budget has not been
exceeded:
The measured optical power at the RX
unit should be > - 21 dBm.
Internal reserve
battery fails
quickly
Reserve battery is not
charged or has failed
Connect to the 13.8 to 24VDC power
source for 16 hours. Replace battery if
charging is unsuccessful
System failure
when external
power is removed
Reserve battery is
dead or disconnected
Check the battery connection. If okay,
replace the battery
RX alarm sounds.
Power LEDs
green
Status LED green
Fiber 1 or Fiber 2
illuminated LED
has switched to
the other fiber
Failure of one of the
redundant optical
paths.
If only one fiber is
used, this may also
indicate intermittent
optical communication
Use an optical power meter to verify
that both transmitter optical ports are
functioning; measured optical power
should be approximately - 6 dBm.
Check for bad fibers or optical splices.
Operation may be restored to the
original fiber after repair by pressing
the Select switch
Table 3: Troubleshooting guide
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Operating Characteristics
Optical
Wavelength:
1300 nm (standard), 1550 nm (optional),1550 nm dFB
(optional) or CWDM wavelengths (optional) designated at
time of purchase.
Fiber:
Single mode over a maximum of 30 km.
Optical Data Rate: 2.488 Gb/sec
Optical Source
Laser diode
Link margin:
15 db
Distance
@1310nm
30 km max
@1550nm
5 km max (dispersion limited)
@1550nm DFB
40 km max
Video and Data
NTSC,PAL and SECAM signals at any of the 8 signal channels. Adder data at
The 9
th
port. (Adder 161 and 882i ONLY)
Interface
RS-170, NTSC, PAL, SECAM
Input/Output Impedance
75 Ohm
Video Signal to Noise Ratio
> 70 dB
Frequency Response
± 0.20 dB
(5 Hz to 6 MHz)
Differential Gain
<=1.0%
Differential Phase
<=0.4 degrees
Chrom-Lum Delay
<= 10 nS NTSC, <= 15 nS PAL
Power Requirements
Voltage:
12 to 24 VDC
Current:
< 1.5 Amp
Power:
< 20 watts
NOTE:
Although the units will operate at 12 VDC, 13.8 VDC is required to charge
the internal UPS battery. Absolute maximum voltage is 30 VDC.
Equipment damage may occur at higher voltages.
Mechanical/Environmental
Dimensions (L x W x H)
16.7” x 10.5” x 1.75”
Weight, each unit
5 lbs
Connectors
Electrical
BNC
Optical
ST (standard)
Temperature Range
- 20C to + 55C case temperature
Humidity Range
0 to 95%, non-condensing
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WARRANTY
LIMITED WARRANTY STATEMENT
Telecast Fiber Systems, Inc. (“Telecast”) expressly warrants to Buyer that the Products supplied
shall be free from defects in materials and workmanship for a period of 12 months following the date
the Products are delivered to Buyer (the “Warranty Period”). Telecast's liability under this limited
warranty shall be limited, at its option, to providing refund of purchase price for Products, or
replacing or repairing Products shown to be defective either in materials or workmanship. Buyer's
sole and exclusive remedy for breach of warranty shall be such refund, replacement or repair.
A claim of defect in materials or workmanship in any Product shall be allowed only when it is
submitted in writing to Telecast Fiber Systems, Inc. within seven days after discovery of the defect,
and in any event within the Warranty Period. No claim shall be allowed in respect of any Product
which has been altered, neglected, damaged or stored in any manner which adversely affects it. In
order to obtain service under the terms of this warranty, Distributor’s customer or Distributor must
notify Telecast of the defect prior to the expiration of the applicable warranty period and obtain a
Return Authorization Number from Telecast. In no event may products be returned to Telecast or to
Distributor for warranty service without having obtained from Telecast a Return Authorization
Number.
This limited warranty applies only to new and unused Products delivered to Buyers located within
the United States of America, or to international Buyers if sold through an authorized Distributor
organization, and shall not extend to any equipment not manufactured by Telecast Fiber Systems,
Inc., even though such equipment may be sold or operated with the Products. In addition, this
limited warranty shall be void and of no further force or effect whatsoever if the Product is repaired
or modified by any person other than an authorized representative of Telecast Fiber Systems, Inc.
without the consent of Telecast Fiber Systems, Inc. This warranty shall not apply to any defect,
failure or damage caused by improper use or inadequate maintenance and care. Nor shall this
warranty apply to any damage caused in whole or in part by attempts by personnel other than
Telecast’s personnel, as approved in advance in accordance with the foregoing provisions, to open,
install, repair, or service the Product; nor to damage resulting from improper connection with
incompatible equipment; nor to damage to a unit which has been modified by personnel other than
Telecast personnel.
Products returned to Telecast for warranty service shall be shipped, freight prepaid to Telecast.
Telecast will return the repaired product or ship a replacement, freight prepaid, to either Distributor
or Distributor’s customer, as requested by Distributor’s customer, at a location within the United
States or, at Telecast’s option, to Distributor’s location in the case of international sales.
This limited warranty shall also apply to Products that replace defective Products and Products that
have been repaired by authorized representatives of Telecast Fiber Systems, Inc., but only for the
original Warranty Period. The Warranty Period shall not be extended by reason of defect, or any
period of time during which the Product is not available to Buyer because of defects or repairs,
without the express written consent of Telecast Fiber Systems, Inc.
EXCEPT FOR THE EXPRESS LIMITED WARRANTY AGAINST DEFECTS IN MATERIALS AND
WORKMANSHIP CONTAINED HEREIN, TELECAST FIBER SYSTEMS, INC. MAKES NO WARRANTY OF
ANY KIND WHATSOEVER, EXPRESS OR IMPLIED, AND ALL WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, AND OTHER WARRANTIES OF WHATEVER KIND ARE
HEREBY DISCLAIMED BY TELECAST FIBER SYSTEMS, INC. THIS LIMITED WARRANTY SETS FORTH
EXCLUSIVELY ALL OF TELECAST FIBER SYSTEMS, INC.'S LIABILITY IN CONTRACT OR OTHERWISE
IN THE EVENT OF A DEFECTIVE PRODUCT.
WITHOUT LIMITATION ON THE FOREGOING, TELECAST FIBER SYSTEMS, INC. EXPRESSLY
DISCLAIMS ANY LIABILITY WHATSOEVER FOR ANY DAMAGES INCURRED DIRECTLY OR
INDIRECTLY IN CONNECTION WITH THE SALE OR USE OF, OR OTHERWISE IN CONNECTION WITH,
THE PRODUCT, INCLUDING WITHOUT LIMITATION, LOSS OF PROFITS AND SPECIAL, INCIDENTAL
OR CONSEQUENTIAL DAMAGES, WHETHER CAUSED BY NEGLIGENCE OR OTHERWISE,
REGARDLESS WHETHER TELECAST HAS BEEN GIVEN ADVANCE NOTICE OF THE POSSIBILITY
THEREOF.
THIS WARRANTY IS GIVEN BY TELECAST IN LIEU OF ANY OTHER WARRANTY EXPRESSED OR
IMPLIED.