Telecast Adder 161 Instruction Manual

Adder™ 161

Audio Multiplexer

Instruction Manual

Telecast Fiber Systems, Inc.

102 Grove Street

Worcester, MA 01605

Tel: [phone]

Fax: [phone]

www.telecast-fiber.com

Adder™ 161

ii

Telecast Adder™ 161

Table of Contents

Introduction 1
Installation 1

Unpacking 1
Installation of Rack Mount Units 2
Line Power 2
Fiber and Coaxial Cable Runs 2

Transmitter Setup Procedure 3

Audio Signal Setup 3

Optimizing S/N Ratios 4
Receiver Setup Procedure 4
Optical Connections 6
Electrical Connections 7

Audio Connections 7

Digital Connections 8

48 VDC Phantom Power 9

Line Power Connection 9

Input Power Fuse 9

Battery Charging 10
Panel Indicators 10
Powering Up 11
Theory of Operation 11

Digital I/O Circuits, Data Connectors 1 and 2 12

Digital I/O Circuits, Data Connectors 3 and 4 12

Audio I/O Circuits, Audio Inputs 12

Audio I/O Circuits, Audio Outputs 15

Optical Outputs 15
Main Curcuits Explained 16
Accessory List 16
Troubleshooting 17
Specifications 18
Repair 19
Warranty 20

Telecast Fiber Systems

iii

Adder™ 161

List of Figures

Figure 1. Installing the Rack Mount Adapters 2
Figure 2. TX Audio Setup Controls: Input Gain 4
Figure 3. RX Audio Setup Controls 4
Figure 4. Transmitter Main Circuit Board 5
Figure 5. Receiver Main Circuit Board 6
Figure 6. ST Optical Connectors, Rear Panel 7
Figure 7. XLR Connectors, Rear Panel 7
Figure 8. DB-9 Connectors, TX and RX, Rear Panel 8
Figure 9. Power Connector and Fuse Locations 9
Figure 10. TX and RX, Front Panel 10
Figure 11. Electronic Block Diagram 11
Figure 12. TX Digital Input Circuit (Connectors 1 & 2 only) 12
Figure 13. RX Digital Output Circuit (Connectors 1 & 2 only) 13
Figure 14. TX Audio Input Stage 14
Figure 15. Audio Output Circuit 15
Figure 16. Battery Charger Block Diagram 16

List of Tables

Table 1. Maximum Fiber Lengths 2
Table 2. Input Signal Levels 3
Table 3. XLR Audio I/O Cable Connections 7
Table 4. Digital Cable Connections 8
Table 5. Power Connections 9
Table 6. Output Signal Levels 15
Table 7. Adder 161 Main Circuits 16

iv

Telecast Fiber Systems

Introduction

The Telecast Adder™ 161 System consists of an Adder 161 TX fiber optic transmitter/
multiplexer and an Adder 161 RX receiver/demultiplexer. The TX unit multiplexes and
sends up to 16 audio signals, two digital data signals, and four remote relay closures.
The RX unit receives the transmission and restores the analog signals. Audio inputs
are set up by internal DIP switches that set amplifier gain to accept either mic or line

level. Audio outputs are always at line level. Two of the four digital connectors provide
RS-422 and RS-232 compatible signals in one direction. The four digital connectors
also provide remote contact closures transmitted in one direction. An internal Ni-Cad
battery provides backup power in the event of line power loss.

The Adder 161 is available in a compact, lightweight 19 inch rack mount. The electrical
connections connections are discussed later in this manual.

Within an Adder 161 TX transmitter unit, the audio signals are first digitized and then
multiplexed with the digital control signals. The combined electrical signal is converted
to an optical signal and launched into the fiber optic cable. All signals are restored at
the receiver.

The Adder 161 TX has a port to allow clock synchronization with additional Telecast
products.

* The Adder 161 also has a coaxial cable link that may be used as an alternate to the
fiber.

Installation

Unpacking

The Adder 161 System consists of:

• One Adder 161 TX Transmitter

• One Adder 161 RX Receiver

• Two external power supplies (AC/DC adapters)

• Plastic or metal covers for optical connectors

• Hardware kits for rack mount units

After unpacking, inspect the units for mechanical damage. Inspect 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 plastic caps on the optical connectors until it is time to attach the

fiber to the units. Store the caps for later use. Replace the caps on to the connectors
whenever the fiber is left disconnected.

1

Adder™ 161

Installation of Rack Mount Units

Units are shipped ready for bench use. All connections are made to the rear panel. To
mount a unit, rack ears must be attached. Each rack ear 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. This will
prevent accidental damage to the cables or their connectors.

Line Power

The external power supplies require 120 VAC. Be sure that AC outlets are within reach
of their 6-foot power cords.

Fiber and Coaxial Cable Runs

The installer is responsible for providing the fiber optic cable runs, which are available
from Telecast Fiber Systems, Inc. The “Accessory List”, at the end of this manual,
contains part numbers for the cable and other items required for the system. 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

850 nm 1310/1550 nm

50 microns 2 km 10 km

62.5 microns 3 km 8 km
8 microns (single mode) 20 km 20 km

Table 1. Maximum Fiber Lengths

2

Telecast Fiber Systems

The system units are factory configured for the fiber type to be used.
Inspect the fiber ends and clean them with clean, dry compressed air or with Kim-

Wipes that have been wet with isopropyl alcohol. Fingerprints or other dirt on the

optical connector end surfaces will reduce the received optical signal level.
If the system is to be used with a coaxial cable instead of an optical fiber, use Belden

type 8281, 75 coax, or equivalent. The maximum length for coax cable is 500 meters

(1640 feet).

Transmitter Setup Procedure

Audio Signal Setup

Note: Setting up the internal switches on the rack mount unit requires removal of its

top cover. The DIP switches should be set before installing the units in their racks.

The setup DIP switches for line or mic input levels are inside the Adder 161 TX on the
main circuit board. There are 16 switches, one for each channel. A representative DIP
switch is shown in Figure 2. Setup steps are not required if all inputs are at the factory
default of 600, 0 dB gain (line level). Setup steps are required if mic level inputs will
be used, if 10 K input impedance is required, or if an optional 10 dB boost is desired
at the TX.

The RX output default setting is 0 dB, unity gain. In the figures throughout this manual,
each switch is shown in its default position.

600 balanced (low Zin) 10 K balanced (high Zin)
Unity +18 dBm peak Unity +16 dBV peak

+10 dB +8 dBm peak +10 dB +6 dBV peak
+20 dB -2 dBm peak +20 dB -4 dBV peak
+30 dB -12 dBm peak +30 dB -14 dBV peak
+40 dB -22 dBm peak +40 dB -24 dBV peak
+50 dB -32 dBm peak +50 dB -34 dBV peak

Table 2: Input Signal Levels

3

Adder™ 161

1. Determine the appropriate TX input gain for each channel.

600 Ω 20 40

Z

in

10 30 50

Gain

dB

Figure 2. TX Audio Setup Controls: Input Gain

2. With the power switch off, remove the top cover by removing the six #4 flat head
screws.

3. With the connector panel of the TX unit facing you, set the DIP switches as needed.

4. Replace the TX top cover and reinstall the screws.

Optimizing S/N Ratios

To obtain an improved noise floor in cases of low input signal levels (+ 8 dBm), the
input gain can be set to + 10 dB and the RX attenuation set to - 10 dB. Thus, the
signal levels remain at the same reference level throughout.

Receiver Setup Procedure

The setup switches for the output levels are inside the Adder 161 RX on the main
circuit board. The factory default is 0 dB.

1. With the power switch off, remove the top cover of the RX by removing the six #4 flat
head screws. In Figure 3, A refers to the odd numbered channel and B refers to the
even numbered channel of the audio pair.

2. Determine for which line outputs the 10 dB cut is to be used.

Figure 3. RX Audio Setup Controls: Trimpots and Gains

4

ƒ

Fine
Level

Receiver

Output

ƒ

Gain
ABAB

−10−

10

Telecast Fiber Systems

3. With the connector panel of the RX unit facing you, move the DIP switches as
needed.

4. Adjust the output signal levels to normalize the outputs using the Fine Level trim pot
in each output circuit of the Adder 161 RX. The range of adjustment is ± 2 dB.

5. If the system is to be used with coaxial cable rather than fiber, move the small switch
near the alarm switch on the PCB to the COAX position. See figure 5 for the exact
location.

6. Replace the RX top cover and reinstall the screws.

Figure 4. Transmitter Main Circuit Board

5

Adder™ 161

Figure 5. Receiver Main Circuit Board

Optical Connections

WARNING! Never look directly into the end of the optical fiber while either end of the

system is operating. Eye damage is possible.

Refer to Figure 6 before beginning the optical connections. The fiber optic connections

to the TX and RX units are identical.

The Adder 161 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-QC. Always follow the connector manufacturer’s directions when fastening a
connector to the cable. A Quick-crimp kit, part number CKIT-ST-QC, is available from
Telecast.

Connect the fiber to the Adder 161 at each end. If a coaxial cable is used instead of a
fiber, cap the optical connectors on the panels to protect them.

6

Telecast Fiber Systems

13579111315

246810121416

AUDIO DATA

1

2

3

4

COAX

OPTICAL

DATA I/O

CLOCK

DC INPUT

12-24 VDC

SLO

Figure 6. ST Type Optical Connectors, Rear Panel

Electrical Connections

Audio Connections

Audio I/O is via 3-pin XLR connectors with industry standard wire locations. See Table

3 and Figure 7.

Pin Signal

1 Ground
2 Balanced I/O (-)
3 Balanced I/O (+)

Table 3. XLR Audio I/O Cable Connections

The XLR connectors are on the rear panel as shown in Figure 7. Transmitter XLR
connectors are female Switchcraft type E3FST-AU. Receiver XLR connectors are male
Switchcraft type E3MST-AU.

TX (Female) RX (Male)

1

3

2

13579111315

246810121416

2

or

3

1

AUDIO DATA

1

2

3

4

COAX

OPTICAL

DATA I/O

CLOCK

DC INPUT
12-24 VDC

SLO

Figure 7. XLR Connectors, Rear Pane

7

Adder™ 161

Digital Connections

Digital signal connections are made via the DB-9 connectors as shown in Figure 8.

The connection specifications are listed in Table 4. A 110 terminating resistor placed
across the balanced inputs may be needed if cable lengths are in excess of 6
feet (if using 110 twisted pair). Serial communications can be RS-232 at one end and
RS-422 at the other, if desired.

Contact closure input to the TX is activated by connecting it to ground or to a TTL logic
0 signal level. Contact closure output from the RX is established by an isolated,

normally open, dry contact.

51

69

13579111315

246810121416

AUDIO DATA

1

2

3

4

COAX

OPTICAL

DATA I/O

CLOCK

DC INPUT

12-24 VDC

SLO

Figure 8. Rack Mount, DB-9 Connectors, TX and RX, Rear Panel

Pin Number Connectors 1, 2 Connectors 3, 4

1 RS-422 in (-) no connection
2 contact out contact out
3 gnd gnd
4 RS-232 out no connection
5 RS-422 out (-) no connection
6 RS-422 in (+) RS-232 in no connection
7 contact out contact out
8 contact in contact in
9 RS-422 out (+) no connection

Table 4. Digital Cable Connections

The digital I/O connector on both the rack mount and portable units, TX and RX, is an
AMP 747905-2, DB-9 sub miniature female.

8

Telecast Fiber Systems

48 VDC Phantom Power

A 48 VDC microphone bias supply is available to the TX units. The voltage is supplied

from a DC/DC converter that is connected through 10 K to pins 2 and 3 of the XLR
connector. The XLR connector circuit board has 16 switches for enabling this power to
the microphones. These switches are accessible by removing the top cover of the rack.
The switches are numbered on the XLR circuit board.

Line Power Connection

Insert the 4-pin XLR connector from the standard Telecast power supply into the Adder
161 DC INPUT 12-24 VDC receptacle, and plug the supply into a 120 VAC line. See
Figure 9 for locations followed by Table 5 for connections.

14

32

13579111315

246810121416

AUDIO DATA

1

2

3

4

COAX

OPTICAL

DATA I/O

CLOCK

DC INPUT

12-24 VDC

Figure 9. Rack Mount Power Connector and Fuse Locations

Any power supply used with the Adder 161 must provide 1.5 amps continuous. Use
the wiring connections in Table 5. The power connector is Switchcraft D4M.

Pin Signal

1 ground
2 no connection
3 no connection
4 +12 to 24 VDC

Table 5. Power Connections

SLO

Note: Although the units will operate at 12 VDC, 13.8 VDC is required to charge the
internal reserve battery.

Input Power Fuse

The 2-amp time delay power fuse is accessible from the rear panel on the rack mount
units (Figure 9). Be sure to use the same fuse type if replacement is required.

9

Adder™ 161

Battery Charging

Charge the internal UPS batteries for 16 hours by attaching each unit to its external
power supply. This will permit battery operation for up to 20 minutes during line power
losses.

Panel Indicators

The LEDs on the front panels of the rack mount units are shown in Figure 10.

•External Power This LED is green when an external supply of 12 to 24 VDC is
connected.

•Internal Reserve This LED is green when power is on and the battery is
adequately charged. It turns red when the battery is discharg
ing, and turns green after one half hour of charging. There may
be a few minutes of reserve power after the indicators turn off.

•Rx Status This red LED on the receiver is on when the fiber optic link is
not properly attached or when the system units are not commu
nicating properly. This indicator is meaningful only if the external
power or the internal reserve LED is lit.

•Coax Tx This green LED on the receiver is on when the incoming signal
is selected on the coax and not on the fiber optic input.

•Optical Tx This green LED on the receiver is on when the incoming signal
is selected on the fiber optic input and not on the coax input.

•Audible Alarm An audible alarm has been incorporated into the Adder 161 in
addition to the LED indicators on the front panel. This alarm will
alert the user that the external input power to the system has
either failed completely or has dropped below the operating
level necessary to charge the internal batteries. An alarm on/off
switch for the audible alarm is located inside each unit on the
main circuit boards (see Figures 4 and 5 on pages 6 and 7).

ADDER  161

ON

OFF

ON

OFF

EXTERNAL

POWER

INTERNAL

RESERVE

EXTERNAL

POWER

INTERNAL
RESERVE

COAX

TRANSMISSION

MASTER SLAVE

MODE

RX STATUSOPTICAL

AUDIO MULTIPLEX ER — TRANSMITTER

Telecast

Fiber Systems, Inc.

Made in U.S.A.

ADDER  161

AUDIO MULTIPLEXER — RECEIVER

Telecast

Fiber Systems, Inc.

Made in U.S.A.

Figure 10. Tx and Rx Front Panels

10

Telecast Fiber Systems

Powering Up

Note: Never try to move the power switch on any front panel 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

under “Installation” on page 1. Firmly seat and latch all connectors.

Power Switch Operation:

1. Pull the lever away from the panel.

2. Move it up for power on, or down for power off.

3. Switch on the power to both Adder 161 units.

The power switches at both units must be on for the system to function.
Verify that the green external power LEDs are illuminated, and that the red rx status

LED is not lit. If you do not get this result, refer to Troubleshooting on page 17.

Theory of Operation

The Adder 161 circuit block diagram is shown in Figure 11. The Adder 161 TX accepts
up to sixteen audio inputs and up to four digital inputs, and time division multiplexes
them onto a single optical fiber or coaxial cable. The system has two basic functions:
multiplexing signals onto an optical fiber or coaxial cable and demultiplexing these
signals.

ADDER 161 TX

Analog Inputs

+

−

Typ. 1 of 16

Digital Inputs

+

−

Typ . 1 of 2

Contact Closure Input

Typ. 1 of 4

Multiplexer

Transmitter

Optical
Fiber

or
Coaxial
Cable

Receiver

ADDER 161 RX

Analog Outputs

Typ. 1 of 16

Digital Outputs

Typ. 1 of 2

Demultiplexer

Contact Closure Output

Typ. 1 of 4

Figure 11. Electronic Block Diagram

All signals on the fiber* are digital and, therefore, relatively insensitive to transmission
level variations. As a demultiplexer, the Adder 161 RX separates the multiplexed

signals it receives from the fiber and converts the audio information back into analog
signals. Coaxial cable may be optionally used instead of fiber optic cable.

There is a one-to-one correspondence between inputs and outputs at opposite ends of
the system.

*All references to transmissions on fiber also apply to the coaxial cable output.

11

Adder™ 161

1

2

1

M

+

-

D
M

2

3

7

Digital I/O Circuits, Data Connectors 1 and 2

The TX digital input buffer circuit shown in Figure 12 accepts both data signals

(RS-232, RS-422 and RS-423) and contact closures and delivers this information to
the multiplexer. The data handling portion of the circuit is connected only to DB-9
subminiature data connectors 1 and 2.

It also accepts a contact closure indicated by the switching of pin 8 to ground level, pin

3. This can also be accomplished by a TTL connection closure with pin 3 as the ground
reference.

The RX digital output buffer circuit shown in Figure 13 accepts the demultiplexed data
and contact closure signals and provides them at appropriate levels to the DB-9

subminiature data connector.

The output closure output is via an SPST-NO relay; this closure is not ground

referenced.

Digital I/O Circuits, Data Connectors 3 and 4

These connectors have contact and relay closure capability only. Digital data can only
be accepted and sent on connectors 1 and 2. The contact input and relay output

circuits are as described above. The pin wiring for connector 3 and 4 closure circuits is
the same as on connectors 1 and 2.

Audio I/O Circuits, Audio Inputs

Audio inputs and outputs are on sixteen separate XLR connectors, each of which is
connected to a circuit as shown in Figure 14.

Inputs can be set to have a balanced input impedance 600 or 10 K. The audio
input circuit shown in Figure 14 can accept a wide range of signal levels. Refer to
“Specifications” for details.

+5

5 9 4 8 3 7 2 6 1

-­+

Data I/O

INOUT

+

10k

00k

.1

39k

10k

+5

74HC14A

39k

10k

BAT54S

22pf

10k

0k

2pf

Data to
Multiplexer

+5

1

AX909

5

4

-5

6

8

ata to

ultiplexer

Figure 12. Digital Input Circuit (Connectors 1 and 2 only)

12

Telecast Fiber Systems

5

1

5

D

F

1

5

-

-

+

of 4 MC33179

1

v

51

180pf

51

OUT

9 4 8 3 7 2 6 1

+

ata I/O

180pf

MMT2222A

IN

Data from
De-Multiplexer

A

10k

6 of 74HC14

10k

C

D

B

E

F

Figure: 13. RX Digital Output Circuit (Connectors 1 and 2 only)

+5

FMMD6100

1k

0/16

+

Data from
De-Multiplexer

13

Adder™ 161

14

Figure 14. TX Audio Input Stage

Telecast Fiber Systems

Audio I/O Circuits, Audio Outputs

The audio output circuit is shown in Figure 15. The output impedance is 30 ,
balanced.

100pF

100pF

Figure 15. Audio Output Circuit

30 Balanced output Frequency response

into 600 @ +8 dBm

Unity gain +18 dBm peak From 20 Hz to 25 KHz ±0.2 dB

-10 dB +8 dBm peak From 20 Hz to 25 KHz ±0.2 dB

Table 6. Output Signal levels

Optical Outputs

The optical output is generated from a high power LED or Laser coupled to the fiber.
User connections are made at a bulkhead type ST connector on the rear panel of the
rack mount unit. Transmission cable 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.

15

Adder™ 161

Main Circuits Explained

A/D, TX High speed analog to digital converters located in each audio

channel.

Multiplexer, TX Sequentially presents two RS-422 digital inputs, four contact

closures and sixteen digitized audio signals from the A/D
converters to the optical output driver.

Demultiplexer, RX Takes sequential digital signals from the pin diode and separates

them: sixteen to the D/A converters, two to the RS-422
transmitters and four to the contact closure relays.

D/A, RX High speed digital to analog converters located in each audio

channel convert the digitized signal back to analog audio.

Battery charger The battery charger (shown in Figure 16) is active whenever
(all units) an Adder 161 unit is receiving DC power between 13.8 and

24 VDC. Charging current is limited to a trickle level at any
voltage input. Full charge takes 16 hours.

Table 7. Adder 161 Main Circuits

+12 VDC to +24

VDC

4

Charge
Control
Circuit

1

Internal
Battery

Figure 16. Battery Charger Block Diagram

Accessory List

The following accessories are available from Telecast:

• Optical power meter kit (includes wavelength filter)

• 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

Front Panel

Power Switch

Switch
Mode
Power

Power to
Electronics

External
Power
LED

Internal
Reserve

LED

Front
Panel

16

Telecast Fiber Systems

Troubleshooting

Symptoms Possible Cause Corrective Action
No operation, No power Make sure both units have their

all indicators are off power switches on, and that their

external supplies are delivering
between13.8 and 24 VDC.

internal reserve Battery depleted Make sure both units have their

LED off power switch off power switches on. Recharge the

battery.

internal reserve External power loss The light becomes green after a 1/2

LED red or internal battery hour of use with the AC power

depleted. adapter. If the light does not turn

green, replace the battery.

No operation Fiber or coax Check for broken or disconnected
rx status LED on communications fibers and faulty wires, or that the

failure Adder 161 unit on the other end is

powered on and operational.

V ery low output Microphone on input Move internal DIP switches to a
on one audio chan. with 0 dB selected higher gain setting.

Signal distorted Line input with Move internal DIP switches to a
on one channel gain setting too high lower gain setting.

Internal reserve Reserve battery is Connect to power source of 13.8 to
battery fails quickly not charged, or 24 VDC for 16 hrs. Replace battery

has failed if charging is not successful.

System goes dead reserve battery dead Check battery connection.
as soon as external or disconnected If okay, replace the battery.*
power is removed

Noisy signal with a A/D input level too low Increase input gain on
low level input source preamplifiers.

*Replace the internal Ni-Cad battery every two years as part of routine maintenance.
Whenever there seem to be problems, first verify the adequacy of optical power at the

Rx end of the fiber. Use an optical power meter such as the one in the Accessory List.

17

Adder™ 161

Specifications

Audio Characteristics

Input Signal Levels
600 balanced (low Zin)

Unity gain +18 dBm peak
+10 dB +8 dBm peak
+20 dB -2 dBm peak
+30 dB -12 dBm peak
+40 dB -22 dBm peak
+50 dB -32 dBm peak

10 K balanced (high Zin)
Unity gain +16 dBV peak

+10 dB +6 dBV peak
+20 dB -4 dBV peak
+30 dB -14 dBV peak
+40 dB -24 dBV peak
+50 dB -34 dBV peak

Output Signal Levels
30 balanced output into 600 W

Unity gain +18 dBm peak

-10 dB +8 dBm peak

Frequency response @ +8 dBm

From 20 Hz to 25 KHz ±0.2 dB

Total Harmonic Distortion

From 20 Hz to 20 KHz (@ +8 dBm) <0.05%
1 KHz (@ +18 dBm) <0.01%

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 +18 dBm) >95 dB

18

Digital Characteristics

Signal Levels

RS-422 interface uses balanced TTL levels
RS-232 interface uses TTL levels

Data Rate

RS-422 Balanced TTL levels 0-150 KBits/sec*
RS-423 TTL levels 0-150 KBits/sec*
RS-232 ±8 Vp-p 0-19.2 KBits/sec

Jitter 1.12 msec
*higher rates possible dependent on user system jitter tolerance
Contact Closure

TX Input
TTL 1 or open circuit (remote contact open)
TTL 0 or shorted to circuit ground (remote contact closed)

RX Output (Form 1A SPST-NO isolated contacts)

Voltage 200 VDC
Switched current 500 mA
Carry current 1.2 Amps
Contact resistance 200 M

Telecast Fiber Systems

Optical Characteristics

Wavelength 850, 1300 and 1550nm

Power Requirements

Voltage 12 to 24 VDC
Current 1.5 Amps, nominal

Note: Although the units will operate at 12 VDC, 13.8 VDC is required to charge the

internal reserve battery.

WARNING: Absolute maximum voltage is 30 VDC.

Equipment damage may occur at higher voltages.

Repair

Call Telecast Fiber Systems, Inc. for assistance with the Adder 161 System at
508-754-4858 and ask for our service department. To return a unit for repair, you
must obtain a return material authorization (RMA) number from Telecast service.

19

Adder™ 161

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.

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Telecast Fiber Systems

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