Telecast Adder 882i Instruction Manual

Adder™ 882i

Intercom/Data Multiplexer

Instruction Manual

Telecast Fiber Systems, Inc.

102 Grove Street

Worcester, MA 01605

Tel: [phone]

Fax: [phone]

www.telecast-fiber.com

2

3

Table of Contents

Introduction 7
Unpacking 9
Installation 9
Rack Mounted Installation 9
Fiber Optic Installation 10
Audio Setup 10
Optical Connections 12
Electrical Connections 13

Intercom Modules 13
4-Wire 14
Clear-Com 14
RTS/Telex 15

Intercom Replacement 16

Digital Data 17

Power Connections 18

Input Power Fuse 19

Operating Details 19
Battery Charging 19
Indicators 19
Powering Up 20

Theory of Operation 21
Digital I/O 22
Optical 23

Preventive Maintenance 24

Accessory List 24

Troubleshooting 24

Specifications 25

Warranty 27

4

5

List of Figures

Figure 1. Front Panel of the Adder 882i 7
Figure 2. Single Fiber System 8
Figure 3. Other Optical Options 8
Figure 4. Installing the Rack Mount Adapters 9
Figure 5. 4-Wire Setup Controls 11
Figure 6. Main Circuit Board 12
Figure 7. ST Optical Connectors on Rear Panel 12
Figure 8. Intercom Module: 4-Wire (balanced) 14
Figure 9. Intercom Module: Clear-Com 15
Figure 10. Intercom Module: RTS/Telex 16
Figure 11. Data "D" Connectors on Front panel 18
Figure 12. Power Connector and Fuse Locations 18
Figure 13. Front Panel Indicators 19
Figure 14. Electronics Block Diagram 21
Figure 15. Digital I/O Connectors 1-4 22
Figure 16. Digital I/O Connectors 5-8 22
Figure 17. Battery Charger Block Diagram 23

List of Tables

Table 1. Maximum Fiber Lengths 10
Table 2. 4-Wire Inputs 11
Table 3. 4-Wire Connections 14
Table 4. Clear-Com Connections 14
Table 5. RTS/Telex Connections 16
Table 6. Digital Data Connections 17
Table 7. Power Connections 18
Table 8. Adder 882i Main Circuits 23
Table 9 Troubleshooting Chart 24

6

7

Introduction

The Telecast AdderTM 882i System consists of two Adder 882i fiber optic
multiplexer/ demultiplexers that simultaneously send and receive multiple
intercoms, eight digital datas, and four remote relay closures in each direction.
These signals are transmitted on optical fibers. Audio levels for 4-Wires are set
up by internal DIP switches that set amplifier gain to accept either mic or line
levels. Digital inputs and outputs are RS-422 and RS-232 compatible signals.
Four of the digital connectors also provide contact closure input and output. The
other four connectors alternatively provide SONY CCU compatible interfaces. All
connections except fiber and coax I/O and power are made via the front panel.
See Figure 1.

ADDER

882i

™

INTERCOM/DATA SYSTEM

Telecast

MADE IN USA

Fiber Systems, Inc.

1 2 3 4

EXTERNAL
POWER

INTERNAL
RESERVE

RECEIVE
STATUS

AUXILIARY
4-WIRE
AUDIO I/O

+8 dBm MAX

DATA/TALLY

DATA/CCU

POWER

1 2 3 4 5 6 7 8

A B

A B

+8dBm MAX LEVEL

600 Ohm

AUXILIARY

4-WIRE

AUDIO I/O

RTS

2-Wire

GAIN IN

NULL

B A

TERM

d

w

Clear-Com

2-Wire

POWER

ON

OFF

d

w

GAIN
OUT

NULL

A B

+8dBm MAX LEVEL

600 Ohm

AUXILIARY

4-WIRE

AUDIO I/O

Figure 1: Front Panel of the Adder 882i

Within the Adder 882i unit, the intercom audio signals are first digitized and then
multiplexed with the digital data and control signals. The combined electrical
signal is converted to an optical signal, launched into the optical fiber and sent on
to a second Adder 882i. This second unit receives the optical signal, converts it
into an electrical data stream, demultiplexes the signals and restores the audio
signals to analog levels.

An internal Ni-Cad battery provides backup in the event of line power loss.

The Adder 882i is available with several optical options and configurations.

• Standard connection with bidirectional signals carried on two optical

fibers at either 1300 or 1550 nm.

• One fiber connection with optically combined bidirectional signals at

1300/1550 nm as shown in Figure 2.

In a standard two-fiber system, identical Adder 882i units are used at each
location. The units both transmit at 1300 nm on the Tx ST connector and receive
the 1300 nm signal on the Rx ST connector. They are connected by the two
fibers so that the optical output of each box is connected to the optical input of
the other.

8

In a one-fiber system, the two Adder 882 units are not identical and are
configured before shipment. They must be used as a pair. The units are
connected by a single fiber that is wavelength division multiplexed (WDM). One
unit transmits from the Tx ST connector at a wavelength of 1300 nm and also
receives at 1550 nm on the same connector. The other unit transmits from the Tx
ST connector at 1550 nm and similarly receives at 1300 nm on the same
connector.

Figure 3 illustrates available optical configurations of the ADDER 882i.

Figure 2: Single Fiber operation

Figure 3: Other optical options

Unpacking

The Adder 882i System consists of:

• Two Adder 882i multiplexer/demultiplexer units

• Intercom Modules

• Two external power supplies (AC/DC adapters)

• Rack mount hardware

• Plastic or metal covers for optical connectors

Installation

Inspect the units for mechanical damage. Inspect all electrical connectors for
bent or damaged pins. Report any damage to the carrier and to Telecast Fiber
Systems, Inc.

Leave the protective plastic caps on the optical connectors until it is time to
attach the fiber(s) to the units. Place the caps back on the connectors whenever
the fibers are disconnected.

Rack Mounted Installation

Units are shipped ready for rack mount. Each “ear” adapter is held in place by
two #10 flat head screws (see Figure 4).

Figure 4: Installing the Rack Mount Adapters

Place the units in their intended locations before attaching any cables or wires.
This will prevent accidental damage to the cables or their connectors.

10

Fiber Optic Installation

The installer is responsible for providing the fiber optic cable runs that are
available from Telecast Fiber Systems, Inc. Refer to the Accessory List on page
18 of this manual for the cable and other items required for system installation.
Be sure that the fiber core diameters are compatible with the intended installation
distances as shown in Table 1.

Fiber core diameter

Maximum fiber length

50 micron

5 km (3 miles)

62.5 micron

3 km (2 miles)

8 micron (single mode)

10 km (6 miles)

Table 1: Maximum Fiber Lengths

The units have been configured at the factory for the fiber type with which they
are going to be used. Mark or tag the optical fibers when they are installed,
carefully avoiding the fiber tip, so that their identity is known at both ends. If there
is confusion about the identity of the two fibers, illuminate the end of one fiber
with a flashlight and look for the light at the other end.

WARNING: Do NOT use the Adder 882i optical output for this purpose.
Never look directly into the end of the optical fiber while either end of the
system is operating. Eye damage is possible.

Inspect the fiber ends and clean them with clean, dry compressed air or with
Kim-Wipes and isopropyl alcohol. Fingerprints or other dirt on the optical
connector end surfaces will reduce the received optical signal level.

Audio Setup

The setup switches for line or mic input levels are inside on the mother-board of
the Adder 882i. Setup steps are not required if all inputs are at the factory default
600 W, 0 dB gain, line level. This would include Clear-Com and RTS intercoms.
Setup is required for 4-Wire intercoms if mic level inputs are used, if 5 kW input
impedance is required, or if the optional 10 dB boost/cut is desired on line inputs.

Procedure

1. Determine which inputs will be used for 4-Wire applications where the
10 dB boost/cut can be used.

2. Copy Table 2 and fill in the required I/O characteristics.

3. With the power switch off, take off the top cover of the unit by removing

the #4 flat head screws at each corner.

11

4. With the rear of the unit facing you (connector end), move the slide

switches shown in Figures 5 and 6 to match the settings in Table 2.
The controls are arranged in pairs.

5. Replace the top cover and gently reinstall the screws.

In Figure 5, A refers to the first numbered channel and B refers to the second
numbered channel of the pair.

UNIT A SWITCH SETTING

123456788

10

MIC IN (0 or +40db gain)
LINE IN (0 or +10db gain)
Input Impedance (600 or 5k)
LINE OUT (0 or –10db gain)

UNIT B SWITCH SETTING

123456788

10

MIC IN (0 or +40db gain)
LINE IN (0 or +10db gain)
Input Impedance (600 or 5k)
LINE OUT (0 or –10db gain)

Table 2: 4-Wire Inputs

Figure 5: 4-Wire setup switches

12

These are printed
On the PC Board

Figure 6: Main PCB

Optical Connections

Refer to Figure 7 before beginning the optical connections.

Figure 7: Optical Connectors on the Rear Panel

13

WARNING: Never look directly into the end of the optical fiber while either
end of the system is operating. Eye damage is possible.

The Adder 882i is compatible with industry standard ST type connectors. It may
be used with installed backbone cables or with dedicated cables.

Assembled cables and connectors are available from Telecast Fiber Systems,
Inc. For custom cable fabrication, use type ST connectors such as Telecast part
number CONN-ST-M. Always follow the connector manufacturer’s directions
when fastening a connector to the cable. A Quick-crimp kit, part number CKIT­3M-QC, is available from Telecast.

On a two fiber system, connect the cables so that the Tx at one end connects to
Rx at the other end. On a one-fiber system, connect the fiber optic cable to the
Adder 882i Tx connector at each end. The Rx ST bulkhead may or may not be
installed on one-fiber units.

In the same way, the system can be operated on two coaxial cables at distances
up to 300m. By connecting a coax from the TX on one side to the RX on the
other, a link can be made. You cannot run optical and coaxial links
simultaneously. These connectors are located directly above the optical
connectors on the rear panel.

The coax link can also be used with our Diamondback and Diamindback2
products. See those respective manuals for details.

Electrical Connections

Intercom Modules

Up to four intercom modules can be installed into the 882i. Two 4-Wires come
built-in on each 882i. Three types of intercom modules are available from
Telecast and shown in Figure 11 on page 10:

• Two balanced 4-wires

• Two Clear-Com 2-wires

• RTS compatible dual-channel 2-wire

Note: A 2-wire system can be interconnected with a 4-wire system or a different
type of 2-wire system but not all intercom functions will work (for example,
calling).

The intercom connectors are 3 or 5-Pin Male XLR’s; Switchcraft E3MST-AU or
E5MST-AU.

14

4-wire Auxiliary (balanced)

4-wire Auxiliary (balanced) intercoms use an individual 5-pin XLR on each of the
two channels in each module. Refer to Figure 8. XLR pin functions are given in
Table 3. Intercom Module Gain is 0 dB.

NOTE: 50 dB of gain may be added to 4-wire module inputs for MIC level
applications via a switch on the intercom Aux-piggyback board. See Audio Setup
on page 4.

PIN #

FUNCTION

Impedance

Signals
1

Ground

2

Input (+)

3

Input (-)

600 Ohm Input

MIC: +8 dBm
LINE: -32 dBm

4

Output (+)

5

Output (-)

>=600 Ohm Load

+8 dBm

Table 3: 4-Wire Intercom Connections

Figure 8: 4-Wire (Balanced) intercom Module

Clear-Com

Clear-Com intercom modules have a 3-pin XLR connector for each of the A and
B channels. This Telecast module fully supports the Clear-Com signaling
protocol and signal levels. The Clear-Com Intercom Connections are listed in
Table 4.

Pin #

Function
1

Ground

2

+ VDC Power

3

Audio

Table 4: Clear-Com Intercom Pin-out

15

NOTE: When using a Clear-Com external power supply, pin 3 termination must
be lifted on the power supply to prevent motor-boating.

Clear-Com operations are optimized by the use of the front panel adjustments
shown in Figure 9 and listed below:

• Input Gain, ±10 dB

• Output Gain, ±10 dB

• Null

Switches are also provided for:

•Dry/unpowered (d), or Wet/powered (w) PORTS

•200 Ohm on or off terminations TERM

Figure 9: Clear-Com 2-Wire intercom Module

The Telecast Clear-Com interface is compatible with powered and unpowered
belt packs as well as fixed equipment. You may power 5 to10 belt packs with
each intercom module from theViper’s internal power supply. Many more belt
packs can be added if powered externally. Refer to your intercom manufacturer’s
documentation for additional system details.

For operation with a belt pack, set the PORTS to w (wet/powered), the TERM to
ON and then center each of the INPUT gain, OUTPUT gain and NULL controls.
Re-adjust these controls to optimize performance as required.

RTS/Telex

RTS modules provide one two-channel intercom on a single 3-pin XLR
connector. This Telecast module fully supports the RTS signaling protocol and
signal levels.

RTS operations are optimized by the use of front panel adjustments as shown in
Figure 10 and listed below.

• Input Gain, ± 10 dB

• Output Gain, ± 10 dB

• Null

16

Table 5 lists the RTS/Telex pin numbers and intercom connections. Switches are
also provided for:

• Dry/unpowered (d), or Wet/powered (w) PORTS

• 200 W ON or OFF terminations TERM

Figure 10: RTS 2-Wire intercom Module

The interface is compatible with powered and unpowered belt packs as well as
fixed equipment. You may power 5 to 10 belt packs with each intercom module.
Refer to your intercom manufacturer’s documentation for additional system
details.

For operation with a belt pack, set the PORTS to w (powered), the TERM to ON
and then center each of the INPUT gain, OUTPUT gain and NULL controls. Re­adjust these controls to optimize performance as required.

Pin #

Function
1

Ground

2

+ VDC Power & Ch.1 Audio

3

Ch.2 Audio

Table 5: RTS Intercom Pin-out

Intercom Module Replacement

Intercom modules within the Viper are installed by Telecast in accordance with
your purchase order. Should you want to change or add modules, you may have
to reset certain switches on the 882i mother-board.

Cable Harnesses

Two multi-conductor cable harnesses connect to the intercom module within the
882i. These cables connect the module to power and signal sources. The first
has ten conductors and connects the data sub-assembly board to the intercom
module. The second has three conductors and supplies power from the DC-DC
converter mounted against the side panel of the 882i. The connectors are Amp-

17

MTA type connectors and they fit all three module types. Use care when inserting
and removing these connectors. When using a 4-Wire module, the 3-pin power
connector is not used since no power is required. Be careful to locate this jumper
in a location where it will not cause an electrical short with other components.
To change an intercom module in the assembly:

1. Turn the power OFF.

2. Remove the four screws that attach the module to the 882i frame.

3. Pull the module half-way out and disconnect the two multi-conductor

cables.

4. Remove module.

5. Carefully insert the new module half-way and attach the two multi-

conductor cables.

6. Re-install the four mounting screws.

7. Turn the power ON.

Digital Data

Digital signal connections are made via the 9-pin “D” connectors described in
Table 6 and illustrated in Figure 11. A 110 W terminating resistor placed across
the balanced inputs may be needed if cable lengths using 110 W twisted pairs
are in excess of 6 feet. The serial communications protocol can be RS-232 at
one end and RS-422 at the other, if desired.

Contact closure input is activated by connecting it to ground. Contact closure
output is an isolated dry contact.

If SONY CCU interface operation is selected, RS-422 and RS-232 functions are
not available at that connector

The digital I/O “D”connector is AMP 747905-2.

Connectors 5-8 (Right)

PIN #

Connectors1-4 (Left)
Serial Comm

CCU Data
1

RS422 in (-)

RS422 in (-)

No Connection

2

Contact Out

No Connection

CCU I/O
Jumper to Pin 6

3

Ground

Ground

Ground

4

RS-232 Out

RS-232 Out

No Connection

5

RS-422 Out (-)

RS-422 Out (-)

Jumper to Pin 8

6

RS-422 In (+)
RS-232 In

RS-422 In (+)
RS-232 In

CCU I/O
Jumper to Pin 2

7

Contact Out

No Connection

No Connection

8

Contact In

No Connection

Jumper to Pin 5

9

RS422 out (+)

RS422 out (+)

No Connection

Table 6: Data Connections

18

ADDER

882i

™

INTERCOM/DATA SYSTEM

Telecast

MADE IN USA

Fiber Systems, Inc.

1 2 3 4

EXTERNAL
POWER

INTERNAL
RESERVE

RECEIVE
STATUS

AUXILIARY
4-WIRE
AUDIO I/O

+8 dBm MAX

DATA/TALLY

DATA/CCU

POWER

1 2 3 4 5 6 7 8

A B

A B

+8dBm MAX LEVEL

600 Ohm

AUXILIARY

4-WIRE

AUDIO I/O

RTS

2-Wire

GAIN IN

B A

TERM

d

w

Clear-Com

2-Wire

POWER

d

w

GAIN
OUT

NULL

A B

+8dBm MAX LEVEL

600 Ohm

AUXILIARY

4-WIRE

AUDIO I/O

Figure 11: Data “D” Connectors

Power Connection

When using the standard Telecast power supply, connect the 4-pin XLR
connector to the Adder 882i and plug the supply into a 120 VAC line. See Figure

12.

Figure 12: Power Connector and Fuse locations

Any power supply used with the Adder 882 must supply 1.5 amperes continuous
current. Use the wiring connections shown in Table 7. The power connector is
Switchcraft D4M.

Pin #

Signal
1

Ground

2

Not used

3

Not used

4

+12-24VDC (<30VDC MAX)

Table 7: Power Connector Pin-out

Female 9-Pin “D”

19

Input Power Fuse

The 2 ampere time delay power fuse is accessible from the rear panel (see
Figure 13). Be sure to use the same fuse type if replacement is required.

Operating Details

Battery Charging

Charge the internal UPS batteries at a minimum 13.8 VDC for 16 hours (40 mA
trickle charge) by attaching each unit to its external power supply. This will permit
battery operation for up to 20 minutes during line power losses.

Indicators

The three LEDs on the front panel are shown in Figure 13.

ADDER

882i

™

INTERCOM/DATA SYSTEM

Telecast

MADE IN USA

Fiber Systems, Inc.

1 2 3 4

EXTERNAL
POWER

INTERNAL
RESERVE

RECEIVE
STATUS

AUXILIARY
4-WIRE
AUDIO I/O

+8 dBm MAX

DATA/TALLY

DATA/CCU

POWER

1 2 3 4 5 6 7 8

A B

A B

+8dBm MAX LEVEL

600 Ohm

AUXILIARY

4-WIRE

AUDIO I/O

RTS

2-Wire

GAIN IN

NULL

B A

TERM

d

w

Clear-Com

2-Wire

POWER

ON

OFF

d

w

GAIN
OUT

NULL

A B

+8dBm MAX LEVEL

600 Ohm

AUXILIARY

4-WIRE

AUDIO I/O

Figure 13: Front Panel LED Indications

• External Power When this green LED is illuminated, an external supply of
between 12 and 24 VDC is connected.

• Internal Reserve This LED is illuminated green when the power is on and the

internal battery is adequately charged. This LED lights after

one half hour of charge. There may be a few minutes of
reserve after the indicators extinguish. This LED is
illuminated red when the internal battery is discharging.

• Link Status This red LED is on when the fiber optic link is not properly
attached, or the system units are not communicating
properly. This indicator is meaningful only if one of the other
two LEDs is on.

An audible alarm has been incorporated into the Adder 882 in addition to the
LED indicators on the front panel. This alarm alerts the user that the internal
batteries are discharging. A defeat switch for the audible alarm is located inside
the unit on the main circuit board.

20

Powering Up

A locking switch is provided to prevent inadvertent power turn off. Never try to
move the front panel switch without first pulling on the switch lever to disengage
its lock.

With power OFF at both units, check all electrical and optical connections as
described in Installation on page 2. Firmly seat and latch all connectors. To
operate the power switch:

1. Pull the lever away from the panel.

2. Move it up for power ON, or down for power OFF.

The power switches at both units must be on for the system to achieve normal
function.

3. Switch on the power to both Adder 882i units.

Verify that the green external power LEDs are illuminated, and that the red link
status LEDs do not light. If you do not get this result, refer to the Troubleshooting
Chart on page 18. Remember that LINK LED OUT at both ends indicates that the
units are locked and functioning properly.

21

Theory of Operation

The Adder 882i circuit block diagram is shown in Figure 15. The unit has two
basic functions: multiplexing signals onto an optical fiber, and demultiplexing
signals from an optical fiber. The Adder 882i accepts up to ten intercom inputs,
eight digital inputs and four remote relay closures and time division multiplexes
them onto a single optical fiber.

Figure 14: Electronics Block Diagram

All signals on the optical fiber are digital and, therefore, relatively insensitive to
transmission level variations. As a demultiplexer, the unit separates the
multiplexed signals it receives from the optical fiber and converts the audio
information back into analog signals. There is a one-to-one correspondence
between inputs and outputs at opposite ends of the system. Intercom inputs and
outputs are on their respective Intercom Modules located on the front panel.
Refer to Figure 1 on page 7.

22

Digital I/O

The digital input buffer circuits shown in Figures 15 and 16 accept and drive
industry standard RS-422, RS-423, and RS-232 signal levels. These circuits may
be used to convert from one signal format to another.
The digital output circuit shown in Figure 16 can be configured by the user to
provide SONY CCU compatible I/O; contact closure circuits are not provided on
connectors 5-8. Refer to Table 6, “Digital Cable Connections,” on page 17 for
instructions on selecting the CCU capability. When this option is selected, the
RS-422 and RS-232 serial communications for that connector are not available.

Figure 15: Digital I/O Connectors 1-4

The circuits in Figure 16 also provide contact closure inputs and outputs. The
contact closure inputs are made by connecting pin 8 to ground (pin 3). This may
be accomplished with a TTL output referenced to pin 3 as ground. The output
contact closure is an SPST-NO relay and is not ground referenced.

Figure 16: Digital I/O Connectors 5-8

23

Optical

The optical output is generated from a high power LED or Laser coupled to an
optical fiber. User connections are made at a bulkhead type ST connector at the
rear panel. The transmission fiber must be matched to the fiber pigtail type
specified at the time of manufacture. The input uses a pin diode and amplifier to
convert the optical signal back into an electrical signal. The optional single-fiber
system uses a wavelength division multiplexer to combine and then to separate
the two colors used. The main circuits in the Adder 882i are described in Table 8.
The basic setup is illustrated in Figure 2 on page 8.

A/D

High speed analog to digital converters located in each intercom

Multiplexer

Sequentially presents 8 RS-422 digital inputs and 8 digitized audio
signals from the A/D converters to the optical output driver

De-Multiplexer

Takes sequential digital signals from the PIN diode and separates
them into 20 separate line; 8 to the D/A converters and 8 to the RS­422 transmitters

D/A

High speed digital to analog converters located at each audio
channel convert the digitized signal back to analog audio

Battery
Charge

The battery charger, Figure 18, is active whenever the 882i is
receiving DC power between 12-24VDC. Charging current is limited
to a trickle level. Full charge will take 16 hours.

Table 8: Adder 882i Main Circuits

Figure 17: Battery Charging Block Diagram

24

Preventive Maintenance

Carry out the following procedures every two years:

• Replace the internal Ni-Cad battery pack.

• Verify the adequacy of optical power at the far end of each optical fiber.
Use an optical power meter such as the one in the Accessory List.

Accessory List

The following accessories are available from Telecast:

• Optical power meter kit

• Cable repair kit

• Loop-back cable to localize signals during installation test

• Replacement Ni-Cad battery pack

• Quick-crimp kit to attach ST connectors to fiber optic cable

• Prefabricated cables built to custom lengths

Troubleshooting

If you are unable to resolve the problems with your Adder 882i System, call
Telecast Fiber Systems, Inc. at 508-754-4858 and ask for our service
department. To return a unit for repair, obtain a return material authorization
(RMA) number from Telecast service.

Symptoms

Possible Cause

Corrective Action

No operation, All indicators off

No power

Make sure power switches on
both ends are on and that the
external power supplies are
delivering 13.8-24VDC
No operation. INTERNAL
RESERVE LED off

Battery depleted or either
power switch off

Make sure power switches on
both ends are on.
Recharge battery
Normal operation. INTERNAL
RESERVE LED RED

Internal battery depleted

The light should go GREEN
after 1/2 hour of use w/ AC
adapter. If not, replace battery
No operation. LINK STATUS
LED on

Optical failure

Check your fiber link with an
optical power meter. Is the
unit on the other end powered
and working?
Very low audio signal output

Mic Input gain set at 0db

Set internal switch to +40db
Distorted audio signal output

Line input set at +40db

Set internal switch to 0db
Internal reserve battery fails
quickly

Reserve battery uncharged

Connect to ext. power source
of 13.8-24VDC for 16 hrs.
System goes dead when ext.
power is removed

Reserve battery dead or not
connected properly

Check battery connection.
Replace battery if necessary.

Table 9: Troubleshooting

25

Specifications

Audio Characteristics

Input Signal Levels

600 W balanced (low Zin)
Unity gain +8 dBm peak
+40 dB -22 dBm peak

Output Signal Level

30 W, balanced output into 600 Ws
Unity gain +8 dBm peak
Frequency response @ +8 dBm, from DC to 22 kHz ± 0.2 dB

Total Harmonic Distortion

From 20 Hz to 20 kHz (@ +8 dBm) <0.05%

Intermodulation Distortion (SMPTE Method)

60 Hz + 3 kHz, mixed 4:1 @ +8 dBm <0.04%

Signal to Noise Ratio (unweighted)

20 Hz to 20 kHz, AVG (ref to +8 dBm) >90 dB

Digital Characteristics

Serial Communications

Data Interface Signal Level Data Rate
RS-422 Balanced TTL levels 0-150 kBits/sec*
RS-423 TTL levels 0-150 kBits/sec*
RS-232 ± 8 Vp-p 0-38.4 kBits/sec
Sony CCU** RM-M7, RM-P3 or compatible 0-20 kBits/sec

Jitter 1.12 msecs
*Higher rates possible dependent on user system jitter tolerance.
** Request Telecast Application Note for more information.

Contact Closure

Input TTL “1” or open circuit Remote contact open

TTL “0” / shorted to circuit gnd Remote contact closed

Output (Form 1A SPST-NO isolated contacts)

Voltage 200 VDC
Switched current 500 mA
Carry current 1.2 A
Contact resistance 200 mW

26

Optical Characteristics

System Margin Data (1-fiber/2-fiber)

Operating Wavelength 1300 nm 1550 nm

TX Output into cable -15/-13 dBm -15/-13 dBm

RX Sensitivity -28/-30 dBm -28/-30 dBm

Power Requirements

Voltage 12 to 24 VDC
Current 1.5 amperes, maximum @ 13.8 VDC
NOTE: Although the units will operate at 12 VDC, 13.8 VDC is required to charge
the internal reserve battery.

CAUTION: Absolute maximum voltage is 30 VDC. Equipment damage may
occur at higher voltages.

27

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.