Foxcom Sat-Light 7226H, Sat-Light 7226HT, Sat-Light 7226HR Installation And User Manual

7226H Interfacility Link
Installation and User’s Guide

© Copyright 2007

This manual contains propriety and confidential information of
Foxcom Reproduction, release to any third party, or any other
unauthorized use, of any information contained herein is
expressly forbidden.

The information contained in this document is believed to be
accurate as of the time of going to press. Specifications are subject
to change without notice.

Foxcom Inc.
Princeton Forrestal Village
136 Main Street Suite 300
Princeton, NJ 08540
USA

Tel: [phone]
Toll free: 1-866-ONEPATH
Fax: [phone]

Website:
e-mail: [e-mail]

Foxcom Ltd.
Beck Science Center
8 Hartom Street, Har Hotzvim
P.O.Box 45092
Jerusalem 91450
Israel

Tel: [phone]
Fax: [phone]

www.foxcom.com

Table of Contents

Important Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Chapter 1 Introduction to the 7226H Interfacility Link...................................1

1.1 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

1.2 Product Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

1.3 Panel Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

1.4 Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Chapter 2 Installation........................................................................................7

2.1 Setting up the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

2.2 Connecting the Fiber Optic Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

2.3 Setting Up the Receiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

2.3.1 Measuring the RF Signal Strength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.4 Powering the IFL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

2.4.1 7180M Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.5 Connecting the Back Panel Jumpers. . . . . . . . . . . . . . . . . . . . . . . . . .13

2.6 Measuring the RF Signal Strength . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

2.7 Aligning the Fiber Optic Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

2.8 Monitoring the Input/Output Signal . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Chapter 3 Product Specifications..................................................................17

3.1 7226H Interfacility Link Specifications. . . . . . . . . . . . . . . . . . . . . . . . .17

3.2 Model Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

3.3 7226H Interfacility Link Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

3.3.1 Transmitter Pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.3.2 Receiver Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3.4 7180M Chassis Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

3.4.1 7180M Alarm Connector Pinouts [J12] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.4.2 7180M Monitor Connector Pinout [J13]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.4.3 LNB Connector Pinout [J11] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.4.4 7180M and Redundancy Switching. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Chapter 4 Gain Control...................................................................................27

Chapter 5 Troubleshooting ............................................................................ 29

Appendix 1 Cleaning Fiber Optic Connections........................................... 31

Appendix 1.1 Cleaning Procedures for FC/APC Connectors ..................... 32

Appendix 1.2 Cleaning Procedure for FC/APC Bulkhead Ports................. 33

Appendix 1.2.1 Swab Method .........................................................................................33

Appendix 1.2.2 Compressed Air Method .......................................................................33

Appendix 2 Installing a Standalone Unit...................................................... 35

Appendix 3 The 2380 Relay Adapter ............................................................ 37

Appendix 3.3 Installing the 2380 Relay Adapter.......................................... 38

Appendix 3.3.1 Parts Required for Installing the 2380 ...................................................38

Appendix 3.3.2 Mounting the the 2380 Relay Adapter ...................................................38

Appendix 3.4 2380 Dimensions and Front Panel Label .............................. 41

Appendix 3.5 2380 Adapter Pinouts ............................................................. 42

Appendix 4 Pinout Charts and Diagrams..................................................... 45

7226H Interfacility Link Installation and User’s Guide page i
Foxcom proprietary information

Figures

Figure 1 Option Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Figure 2 7226HT Transmitter Front and Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Figure 3 7226HR Receiver Front and Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Figure 4 Transmitter Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 5 Receiver Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 6 Typical Application of a 7226H Interfacility Link. . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 7 7180M Chassis Rear View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 8 Jumper Installation: Tx and Rx only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 9 Jumper Installation: 2040 Switch in slot 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 10 Jumper Installation: 2040 Switch in slot 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 11 Jumper Installation: 2040 Switch in slots 2 and 5 . . . . . . . . . . . . . . . . . . . . . . 14

Figure 12 Fiber Optic Alignment Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 13 Unit dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 14 7810M Chassis Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 15 7226HT Transmitter pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 16 7226HR Receiver pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 17 7180M Chassis rear view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 18 7180M Chassis Pin numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 19 Wiping the connector with a Kim wiper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 20 Wiping the connector with a Kim wiper [2]. . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 21 Cleaning the Optical Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 22 Cleaning the Optical Port [2] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 23 Installing the guide pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 24 Mounting the adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 25 Mounting the screws [1] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 26 Mounting the screws [2]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 27 Mounted 2380 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 28 2380 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 29 2380 Front Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 30 2380 Pin numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 31 Standard 7180M and 7180M with 2380 Relay Adapter Pinout . . . . . . . . . . . 46

Figure 32 7180M with 2040 RF Switch Pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Figure 33 Pinout of 7180M Jumper with 2040 RF Switch in slots 2 and 5 . . . . . . . . . . . 50

Figure 34 Pinout of 7180M Jumper with 2040 RF Switch in slot 2 . . . . . . . . . . . . . . . . . 51

Figure 35 Pinout of 7180M Jumper with 2040 RF Switch in slot 5 . . . . . . . . . . . . . . . . . 52

Figure 36 Pinout of 7180M Jumper with Transmitter and Receiver units only . . . . . . . . 53

Tables

Table 1 7226HT Transmitter LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Table 2 7226HT Receiver LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Table 3 7226H Interfacility Link Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Table 4 7226HT Transmitter Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 5 7226HR Receiver Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 6 7180M Alarm Connector [J12} Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table 7 7180M Monitor Connector [J13] Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Table 8 LNB Connector Pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Table 9 Troubleshooting the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 10 Cleaning materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 11 2380 Adapter Pinouts [J2] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Table 12 2380 Monitor Connector Pinout [J4] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

page ii Document no. 93-005-50-A

Important Information

Important Information

Warranty and Repair Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

General Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Specific Product Warranty Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Returns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv

Limitations of Liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv

Reporting Defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Personal Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Equipment Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Warranty and Repair Policy

Foxcom performs testing and inspection to verify the quality and
reliability of our products. Foxcom uses every reasonable precaution
to ensure that each unit meets specifications before shipment.
Customers are asked to advise their incoming inspection, assembly,
and test personnel as to the precautions required in handling and
testing our products. Many of these precautions are to be found in
this manual.

The products are covered by the following warranties:

General Warranty

Foxcom warrants to the original purchaser all standard products sold
by Foxcom to be free of defects in material and workmanship for 24
months from date of shipment from Foxcom. During the warranty
period, Foxcom will repair or replace any product that Foxcom proves
to be defective. This warranty does not apply to any product which
has been subject to alteration, abuse, improper installation or
application, accident, electrical or environmental over-stress,
negligence in use, storage, transportation or handling.

Specific Product Warranty Instructions

All Foxcom products are warranted against defects in workmanship,
materials and construction, and to no further extent. Any claim for
repair or replacement of units found to be defective on incoming
inspection by a customer must be made within 30 days of receipt of
shipment, or within 30 days of discovery of a defect within the
warranty period.

This warranty is the only warranty made by Foxcom and is in lieu of
all other warranties, expressed or implied. Foxcom sales agents or
representatives are not authorized to make commitments on
warranty returns.

7226H Interfacility Link Installation and User’s Guide page iii
Foxcom proprietary information

Important Information

Returns

In the event that it is necessary to return any product against above
warranty, the following procedure shall be followed:

1. Return authorization is to be received from Foxcom prior to
returning any unit. Advise Foxcom of the model, serial number,
and discrepancy. The unit may then be forwarded to Foxcom,
transportation prepaid. Devices returned collect or without
authorization may not be accepted.

2. Prior to repair, Foxcom will advise the customer of our test
results and any charges for repairing customer-caused problems
or out-of-warranty conditions etc.

3. Repaired products are warranted for the balance of the original
warranty period, or at least 90 days from date of shipment.

Limitations of Liabilities

Foxcom's liability on any claim, of any kind, including negligence for
any loss or damage arising from, connected with, or resulting from
the purchase order, contract, quotation, or from the performance or
breach thereof, or from the design, manufacture, sale, delivery,
installation, inspection, operation or use of any equipment covered by
or furnished under this contact, shall in no case exceed the purchase
price of the device which gives rise to the claim.

EXCEPT AS EXPRESSLY PROVIDED HEREIN, FOXCOM MAKES NO
WARRANTY, EXPRESSED OR IMPLIED, WITH RESPECT TO ANY GOODS,
PARTS AND SERVICES PROVIDED IN CONNECTION WITH THIS AGREEMENT
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. FOXCOM
SHALL NOT BE LIABLE FOR ANY OTHER DAMAGE INCLUDING, BUT NOT
LIMITED TO, INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES ARISING
OUT OF OR IN CONNECTION WITH FURNISHING OF GOODS, PARTS AND
SERVICE HEREUNDER, OR THE PERFORMANCE, USE OF, OR INABILITY TO
USE THE GOODS, PARTS AND SERVICE.

The Company's exclusive warranty and the remedy provided for
breach thereof shall not apply to:

1. Any Product used or operated other than pursuant to the
Company's written instructions,

2. Damage or deficiencies resulting from accident, alteration,
modification, misuse, tampering, negligence, improper
maintenance, installation or abuse,

3. Use of any Product other than at the Installation Site,

4. Use of any Product that is defective or damaged due to misuse,
accident, or neglect, or due to external electrical stress, lightning
or other acts of nature,

5. Use of any Product by a person who is not any authorized
employee of the Customer, or

6. Used other than as explicitly authorized in writing by the
Company.

page iv Document no. 93-005-50-A

Important Information

Reporting Defects

The units were inspected before shipment and found to be free of
mechanical and electrical defects.

Examine the units for any damage which may have been caused in
transit. If damage is discovered, file a claim with the freight carrier
immediately. Notify Foxcom as soon as possible.

Note Keep all packing material until you have completed the

inspection.

Precautions

Personal Safety

OPTICAL RADIATION
Applying power to the transmitter unit will create a laser energy
source operating in Class I as defined by IEC 825-1. Use either an
infrared viewer, optical power meter or fluorescent screen for optical

output verification.

AC POWER HAZARD
The rackmount power supply line is EMI filtered. The chassis is
connected to earth ground in compliance with safety requirements.
Always use the 3-prong AC plug with earth ground to avoid

possibility of electrical shock hazard to personnel.

Equipment Safety

To avoid damaging your product, please observe the following:

1. The output of the receiver is AC coupled and can withstand the
bias from a satellite receiver.

Do not exceed 25V DC bias.

2. The input of the transmitter has an optional built-in bias for
inserting DC power up the coax to the LNB. Make certain that
any equipment or test equipment connected to the transmitter
input can withstand this bias.

3. Do not allow any dirt or foreign material to get into the optical
connector bulkheads. This may cause damage to the polished
optical connector end faces.

4. The optical fiber jumper cable bend radius is 3 cm. Smaller radii
can cause excessive optical loss and/or fiber breakage.

5. If multiple transmitters are installed in the chassis allow
sufficient room for adequate ventilation; otherwise the units may
overheat causing possible safety hazard or equipment damage.

6. Fuses: The 7180M chassis does not have fuses. If the unit fails, pull
the power supply out from the chassis and then push it back in.

7. When several units are installed on one 7180M chassis, ensure
that the total units’ current consumption (including any LNB
bias) does not exceed 6A.

7226H Interfacility Link Installation and User’s Guide page v
Foxcom proprietary information

Important Information

page vi Document no. 93-005-50-A

1 Introduction to the 7226H Interfacility Link

1.1 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.2 Product Drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.3 Panel Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.4 Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

The Sat-Light™ 7226H IFL transmits an L-Band RF signal over
single-mode fiber from a satellite antenna LNB to control room
equipment up to 5 kilometers away. The 7226H IFL is a DFB high
dynamic range link for applications that require either a higher
quality link or transmission over long distances. The 7226H IFL
consists of an optical transmitter (7226HT) which receives the L­Band signal from the LNB and an optical receiver (7226HR) which
connects to a satellite receiver.

The 7226HT and 7226HR modules plug into the 7180M, a 3U
chassis/power supply, which enables expansion of the system to
accommodate any eight Sat-Light modules. Accessories include the
Model 7001P Power Supply, the Model 2040 1:1 Redundant Switch,
the Model 2100 Amplifier, the 2380 Relay Adaptor, and the
Model 7050 Serial Optical Multiplexer, an asynchronous data link.

The 7226H IFL transmits all satellite modulation schemes - digital
or analog. Any FM modulated RF signal is transmitted accurately.
The RF signal is directly modulated and adds virtually no phase
noise to the original signal. The direct modulation, along with
extremely flat amplitude and group delay, guarantees low bit error
rate (BER) and high signal quality, independent of distance.
Featuring a Multi-Quantum Well (MQW) laser diode, the 7226H IFL
operates over a wide temperature range, without needing to be
cooled. Slow start optical power control protects the laser from DC
transients upon turn-on.

Gain Control provides for optimization of the RF signal. LEDs, back
panel monitors, alarms and test ports allow for complete system
status monitoring and for interfacing with monitor and control
(M&C) systems.

7226H Interfacility Link Installation and User’s Guide page 1
Foxcom proprietary information

Options

1.1 Options

The 7226H Interfacility Link comes with a variety of options:

1. 155nm laser; a 1310 nm laser is standard.

2. LNB powering; the transmitter unit can provide 14 or 18 VDC for
optional LNB powering, depending on the Power Supply in the
chassis

3. 50 Ω or 75 Ω Input/Output Impedance/BNC female connector.
Standard impedance is 50 Ω/F type, female connectors.

4. Standalone unit; the 7226H Interfacility Link can be installed as
a standalone unit. If the 7226H is used as a standalone, a
separate power supply must be used.

5. On the side of the 7226HT and the 7226HR units is a label which
lists options 1 to 3. Under each option is a square
includes a particular option the square under the option should
be marked.

1

.

2

. If the unit

Figure 1 Option Label

1. At least one power supply, either a 14 VDC or an 18 VDC, depending on
customer specifications, must be installed in the 7180M chassis. Up to
two rackmounted power supplies may be installed on the chassis. The
two power supplies must have the
two 18 VDC.

External Power Supply: An external power supply may be used.The external

power supply is connected via connector J11. If an external power
supply is used this must be specified when ordering the7226H and the
chassis. The voltage level provided by the external power supply is
customer-defined any may be different from the internal voltage power
supply.

2. The label includes options which are not relevant to the
7226H Interfacility Link.

same voltage, either two 14VDC or

page 2 Document no. 93-005-50-A

1.2 Product Drawings

Product Drawings

Figure 2 7226HT Transmitter Front and Rear Panel

Figure 3 7226HR Receiver Front and Rear Panel

7226H Interfacility Link Installation and User’s Guide page 3
Foxcom proprietary information

Panel Descriptions

1.3 Panel Descriptions

On the Front Panel of the 7226H IFL units are two LEDs. Both LEDs
should be on when the unit is in use. The following tables describe
the LEDs.

The LEDs on the Front Panel of the 7226H Transmitter and Receiver
are:

LED Name LED Function
Laser
RF

T able 1 7226HT Transmitter LEDs

LED Name LED Function
Opt.
RF

Indicates if the laser is functioning
Indicates if the RF signal is within the operating limits

[-25 to -5 dBm]

Indicates if the optical input power is above the minimal level [−3 dBm]
Indicates if the RF signal is within the operating limits

[-25 to -5 dBm]

T able 2 7226HT Receiver LEDs

page 4 Document no. 93-005-50-A

1.4 Block Diagrams

Block Diagrams

Figure 4 Transmitter Block Diagram

Figure 5 Receiver Block Diagram

7226H Interfacility Link Installation and User’s Guide page 5
Foxcom proprietary information

Block Diagrams

page 6 Document no. 93-005-50-A

2 Installation

The following section details how to install the 7226H Interfacility

3

Link units

2.1 Setting up the Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2 Connecting the Fiber Optic Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3 Setting Up the Receiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.3.1 Measuring the RF Signal Strength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.4 Powering the IFL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.4.1 7180M Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.5 Connecting the Back Panel Jumpers . . . . . . . . . . . . . . . . . . . . . . . 13

2.6 Measuring the RF Signal Strength . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.7 Aligning the Fiber Optic Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.8 Monitoring the Input/Output Signal . . . . . . . . . . . . . . . . . . . . . . . . 16

Observe all warnings and cautions mentioned at the beginning of
this manual (See

. Setting up the 7226H Transmitter/Receiver consists:

Important Information on page iii).

If after set-up you experience problems, see

Chapter 5: Troubleshooting,

on page 29.

Figure 6 Typical Application of a 7226H Interfacility Link

3. This section gives instructions on installing the transmitter an ad
receiver in a chassis rackmount. For instructions on installing
standalone units see

7226H Interfacility Link Installation and User’s Guide page 7
Foxcom proprietary information

Appendix 2 Installing a Standalone Unit on page 35.

Setting up the Transmitter

2.1 Setting up the Transmitter

1. Place the 7226HT in the 7180M Chassis.

2. Apply AC power to the chassis. The Power Supply and Laser
LEDs should be lit.

3. Using an optical power meter, measure the optical power. Insert
the meter’s cable into the Transmitter’s optical connector. Power
levels should be between 2 - 5 mW (+3 to +7 dBm).

Alternatively, use a DVM to measure the voltage at:

• pins J13-P17 through J13-P24 for the slot being measured
(See

Table 4 7226HT Transmitter Pinout on page 20 for details

regarding J13 pinouts) (7180M Rackmount)

• at pin #6 of the 9 pin connector (standalone)

The signal level should be -4.2 to -4.8VDC.

4. On the rear panel, connect the coax cable to the RF Input
Connector. The RF LED should be lit.

5. On the rear panel, connect the fiber optic cable to the Optical
Connector.

6. Adjust the Gain Control Potentiometer to give the desired output
power. Using a small screw driver, turn the potentiometer
(located on the front panel) to increase or decrease the gain.

•To increase the gain, turn the gain control clockwise.

•To decrease the gain, turn the gain control

counterclockwise.

For more information, see Aligning the Fiber Optic Link on page 15.

Note If either LED is not lit, see Chapter 5: Troubleshooting, on page 29.
Caution When monitoring the voltage outputs use only a high

resistance DVM.

page 8 Document no. 93-005-50-A

2.2 Connecting the Fiber Optic Cable

Before connecting the cable:

1. The fiber optic cable must be either fusion spliced or connected via

FC/APC connectors.

2. Wipe the connector with a lint-free cotton cloth.

3. Note the polarity key of the optical connector before inserting.

To connect the cable:

1. Line Up the Polarity Key.

2. Insert the connector

Connecting the Fiber Optic Cable

3. Tighten the connector

Caution Do not apply any glue, silicon adhesive, or any other

material to the fiber optic connector!

7226H Interfacility Link Installation and User’s Guide page 9
Foxcom proprietary information

Setting Up the Receiver

2.3 Setting Up the Receiver

1. Place the 7226HR Receiver in any of the 7180M Chassis, unless a
2040 RF Switch is installed. (See
page 12.).

Note If a 2040 RF Switch(s) is being installed, then slots 2 and/or 5 of

the 7180M are reserved for the switch(es).

2. Apply AC power to the chassis. The Power Supply’s LED should
be lit.

3. On the rear panel connect the fiber optic cable from the De-Mux
to the Optical Connector. The Opt. LED should be lit (if the
Transmitter is operating correctly).

4. Using an optical power meter, measure the optical power coming
to the Receiver from the fiber optic cable. The power levels of the
Receiver should be the power level measured at the Transmitter
minus the fiber loss

Alternatively, use a DVM to measure the voltage at:

• pins J13-P7 through J10-P12 for the slot being measured

Table 5 7226HR Receiver Pinout on page 21 for details

(See
regarding J13 pinouts) (7180M Rackmount). The voltage
level should be 1 V for each 1 mW measured at the
Receiver input.

• at pin #5 of the 9 pin connector (standalone)

5. On the rear panel, connect the coax cable to the RF Output
Connector.

6. Adjust the Gain Control Potentiometer to give the desired output
power. Using a small screw driver, turn the potentiometer
(located on the front panel) to increase or decrease the gain.

4

.

Figure 8 7180M Chassis Rear View on

Notes

1. The potentiometer is 10 turn potentiometer.

•To increase the gain, turn the gain control clockwise.

•To decrease the gain, turn the gain control

counterclockwise.

For more information see Aligning the Fiber Optic Link on page 15.

2. If the LED is not lit, see Chapter 5: Troubleshooting, on page 29.

4. Fiber loss is defined as:
(attenuation/km x length (km) of the fiber optic cable) + (1.0 dB x
number of connectors).

For example if a signal with an optical wavelength of 1310 nm is
transmitted over a link 10 kilometers long which had two connectors the
loss would be:
(0.4 dB/km x 10 km) + (0.5 dB x 2) = 5.0 dB

page 10 Document no. 93-005-50-A

2.3.1 Measuring the RF Signal Strength

The RF signal strength can be monitored during operation via a DC
RF signal-strength monitor. Maintenance personnel can perform a
simple verification process.

To measure the RF signal strength:

• Rackmount Connector: Using a Digital Volt Meter, measure the

voltage at J13-P1 through J13-P8.

2380 Relay Adapter: Using a Digital Volt Meter, measure the voltage

•
at J4-P1 through J4-P8.

•

Standalone: Using a Digital Volt Meter, measure the voltage at the

connector pin #4.

The nominal level is 3 to 4 VDC.

2.4 Powering the IFL

• Transmitter power requirement: 14 or 18 VDC 5@ 270 mA
(excluding LNB Drive option).

• Receiver power requirement: 14 or 18 VDC

• The Standalone Transmitter/Receiver is powered by a Foxcom
supplied external DC power supply.

• The Rackmount Transmitters/Receivers are plugged into the
rackmount chassis. The chassis can accept and power up to eight
units.

5.

@ 360mA.

Powering the IFL

Note At temperatures below -10

heater will require an additional 120
total power requirement will then be 390

Caution Ensure that there is a good airflow around the chassis

°

C, the Transmitter’s internal

mA. The Transmitter’s

mA.

rackmount.

5. At least one power supply, either a 14 VDC or an 18 VDC, depending on
customer specifications, must be installed in the 7180M chassis. Up to
two rackmounted power supplies may be installed on the chassis. The
two power supplies must have the
two 18 VDC.

External Power Supply: An external power supply may be used.The external

power supply is connected via connector J11. If an external power
supply is used this must be specified when ordering the
7226H Interfacility Link and the chassis. The voltage level provided by
the external power supply is customer-defined any may be different
from the internal voltage power supply.

same voltage, either two 14VDC or

7226H Interfacility Link Installation and User’s Guide page 11
Foxcom proprietary information