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

Powering the IFL

7226H Interfacility Link Installation and User’s Guide page 12
Foxcom proprietary information

2.4.1 7180M Chassis

The 7180M Chassis provides power to the plug in units. The power supply is a switching type. Each plug-in
regulates its own voltage. The power supply provides:

• 15 or 18 VDC stable

• AC input; 100 - 240 VAC

• Units can be plugged in “hot standby”

Figure 7 7180M Chassis Rear View

Connecting the Back Panel Jumpers

7226H Interfacility Link Installation and User’s Guide page 13
Foxcom proprietary information

2.5 Connecting the Back Panel Jumpers

On the rear panel of the 7180M Back Panel are product selectors (JP1 to JP4). The 3 pin selectors (male) are
the connecting point between the slots and the back panel. One pin is for the transmitter/receiver (Tx/Rx), one
is for the optional 2040 1:1 Redundant Switch, and one is for the 7180M. A 2 pin jumper (female) is placed on
the relevant pins to complete the connection between the 7180M and the units. For example, if a 2040 Switch
is being used, the jumper is placed on the Switch-7180M pins.

To connect the jumpers:

1. Each jumper has two sets of pins, upper and lower. The upper pins are labeled SW (Switch) and the lower
pins Tx/Rx.

2. If the 7180M has Tx or Rx units only, place all jumpers on the lower two pins.

Figure 8 Jumper Installation: Tx and Rx only

3. If the 2040 Switch is installed in Slot 2, place the JP1 and JP2 jumpers on the higher two pins and the JP3
and JP4 jumpers on the lower two pins.

Figure 9 Jumper Installation: 2040 Switch in slot 2

Connecting the Back Panel Jumpers

7226H Interfacility Link Installation and User’s Guide page 14
Foxcom proprietary information

4. If the 2040 Switch is installed in Slot 5, place the JP1 and JP2 jumpers on the lower two pins and the JP3
and JP4 jumpers on the higher two pins.

Figure 10 Jumper Installation: 2040 Switch in slot 5

5. If the 2040 Switch is installed in Slots 2 and 5, place the JP1, JP2, JP3, and JP4 jumpers on the higher two
pins.

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

2.6 Measuring the RF Signal Strength

The Receiver’s 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:

Using a Digital Volt meter, measure the voltage at the connector
pin#4 (both Rackmount and Standalone).

2.7 Aligning the Fiber Optic Link

The final step in installing the 7226H Interfacility Link is
re-adjusting the Receiver Gain Control for unity gain.

Measuring the RF Signal Strength

To set the unity gain (standard version)

6

1. Connect the combiner to the input of the transmitter.

2. Set the Signal Generator 1 to -8 dBm on the Spectrum Analyzer
at 1500 MHz.

3. Repeat for the Signal Generator 2 at 1510 MHz.

4. Set up the system as shown in

Figure 12 Fiber Optic Alignment Setup

5. Set the Transmitter Gain Control for 3rd order intermodulation
level of -50 dBc at the Receiver output.

6. Adjust the Receiver Gain Control for unity gain.

Figure 12 Fiber Optic Alignment Setup

6. If you are unable to perform this procedure see Chapter 4: Gain Control,
on page 27.

7226H Interfacility Link Installation and User’s Guide page 15
Foxcom proprietary information

Monitoring the Input/Output Signal

2.8 Monitoring the Input/Output Signal

On the front panel of the 7226HT transmitter and the 7226HR
Receiver is a F-Connector. This connector, which is labeled RF Test,
is used to monitor the Input RF signal transmitted to the
Transmitter and the RF output signal transmitted from the Receiver.

To Monitor the Signal

1. Using a coax cable, connect the RF Test Port to the test
equipment.

2. The Test Port Coupling is 20 dBc.

page 16 Document no. 93-005-50-A

7226H Interfacility Link Specifications

3 Product Specifications

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

3.1 7226H Interfacility Link Specifications

RF Specifications

Frequency range 950 – 2150 MHz [2500 MHz optional]
Flatness 950 – 2150 MHz ± 1.0 db [typical]

Flatness 950 – 2500 MHz
Flatness @ 36 MHz ± 0.2 dB [max.]
Input/Output impedance 50 Ω SMA [75 Ω optional]
Return Loss 1.5:1 @ 50 Ω Impedance [max.]

Intermodulation products
Noise Figure

4

OIP3
Input signal range [total power] -25 to -5 dBm
Output signal range [total power] -25 to -5 dBm
CNR @ 36 MHz / 36 dB / 2 Km 60 dB
Gain control Manual

Link gain

6

SFDR
RF connector F-type [standard] 50/75W BNC or SMA

Maximum input power
Test port coupling 20 dBm

Table 3 7226H Interfacility Link Specifications

1. Flatness between 950 – 2150 is ±1.5 dB. In the bandwidth between 2150 – 2500 MHz
the flatness rises to ±2.5 dB

2. At nominal conditions

3. @ maximum input power @ 1 dB Optical loss @ Unity gain

4. This specification is true when: IMD = -40 dBc, Pout = -5 dBm

5. Full gain range is obtainable when in the input/output signal power is within the speci­fied range

6. @ maximum input

7. With no damage

3

5

1

2

7

± 2.5 db [max]

1:57:1 @ @75 Ω Impedance [max.]

-50 dBc [max.]
25 dB
+15 dBm

0 ± 10 dB [within total power range]
109 dB Hz 2/3 @ -25 dBm [typical]

[optional]
10± dBm

7226H Interfacility Link Installation and User’s Guide page 17
Foxcom proprietary information

7226H Interfacility Link Specifications

Optical Specifications

Optical Wavelength 1310 ± 10 nm [1550 nm optional]
Optical power output +3 to +7 dBm/ 2 to 5 mW
Optical connector FC/APC
Optical budget 5 Km @ 3 dB
Optical return loss -60 dB

Physical Specifications

Chassis capacity 8 plug-ins, and 2 power supplies
Chassis size 19” × 3U × 7”
Power for rackmount [max.] 100 to 240 VAC 50/60Hz 90 Watts
Standalone size 5” × 4.8” × 1.3”
Power for standalone

Operating Temperature Range -10°C to +55°C
Storage Temperature Range -40°C to +85°C

All specifications are subject to change without prior notice

Transmitter

Receiver +15 VDC @ 360 mA max.

+15 VDC @ 330 mA max.
(450 mA temp.< 10° C)

Note Optical fiber plant must be single-mode 9/125 and low

reflections. Use FC/APC connectors only.

page 18 Document no. 93-005-50-A

3.2 Model Dimensions

Figure 13 Unit dimensions

Model Dimensions

Figure 14 7810M Chassis Dimensions

7226H Interfacility Link Installation and User’s Guide page 19
Foxcom proprietary information

7226H Interfacility Link Pinouts

3.3 7226H Interfacility Link Pinouts

3.3.1 Tran smitter Pinout

Standalone
9-Pin
Connector
[J13]

1 — — +15 or 18V

2 — — Spare Not Used
3 J11-P9

4 J13-P1 to

5

6 J13-P17 to

7 J12-P1 to

8 J12-P9 to

9 J11-P1 to

Table 4 7226HT Transmitter Pinout

1. If the 2380 Relay Adapter is installed, the alarms are dry contact. See Appendix 3 The 2380
Relay Adapter on page 37.

2. Dependent on order

Note

If a 2380 Relay Adapter is installed RF and Optical Levels are measured

7180M
Chassis
Backplane
Connector

J12-P25
J13-P25

J13-P8
J13-P9 to
J13-P16

J13-P24

J12-P8

J12-P16

J11-P6

2380 Relay
Adapter
Connector Name Description

330 mA

Power

J-P25
J4-P25

J4-P1 to J4-P8 RF-SSI RF Signal Strength Indicator;

J4-P9 to J4-P16 LOR Measures Laser Optical Power

J4-P17 to J4-P24 LSRI Indicates Laser Bias;

J2: P1-P2
P3-P4, P5-P6
P7-P8, P9-P10
P11-P12,
P13-P14
P15-P16

See note below OA

GND Chassis Ground

RF-A

LNB bias
[optional]

[excluding. LNB option]

Range 3.0

range -2 to -4.5 V

Range -4.2 to -4.8VDC
RF Alarm: Open collector
interface.1 Sinks current when
RF level is low, up to 30 mA.

Optical Alarm: Open Collector
Interface
optical, up to 30 mA.

External LNB Bias

2

to 4.0VDC

1.

. Sinks current at low

together; the alarm indicates a problem in either the RF or Optical Levels.

Figure 15 7226HT Transmitter pinout

page 20 Document no. 93-005-50-A

7226H Interfacility Link Pinouts

3.3.2 Receiver Pinouts

Standalone
9 Pin
Connector
[J14]

1 — — +15 or 18V Power 330 mA
2 — — Spare Not Used
3J11-P9

4 J13-P1 to J13-P8 J4-P1 to J4-P8 RF-SSI RF Signal Strength

5 J13-P9 to J13-P16 J4-P9 to J4-P16 ROP Indicates Received

6 — — Spare Not Used
7 J12-P1 to J12-P8 J2: P1-P2

8 J12-P9 to J12-P16 See note below OA Optical Alarm: Open

9 — — Spare Not Used

Table 5 7226HR Receiver Pinout

1. If the 2380 Relay Adapter is installed, the alarms are dry contact. See Appendix 3 The 2380
Relay Adapter on page 37.

7180M Chassis
Backplane
Connector

J12-P25
J13-P25

2380 Relay
Adapter
Connector Name Description

J2-J25
J4-P25

P3-P4, P5-P6
P7-P8, P9-P10
P11-P12
P13-P14
P15-P16

GND Chassis Ground

Indicator
Range 0.2 - 10.5 V

Optical Power
Range 1V/!mW optical
power

RF-A RF Alarm: Open collector

interface
when RF level is low, up
to 30 mA.

collector interface
current when optical level
is low, up to 30 mA.

1

. Sinks current

1.

. Sinks

Note If a 2380 Relay Adapter is installed RF and Optical Levels are measured

together; the alarm indicates a problem in either the RF or Optical
Levels.

Figure 16 7226HR Receiver pinout

Caution When monitoring the voltage outputs use only a high resistance DVM.

7226H Interfacility Link Installation and User’s Guide page 21
Foxcom proprietary information

7180M Chassis Pinouts

7226H Interfacility Link Installation and User’s Guide page 22
Foxcom proprietary information

3.4 7180M Chassis Pinouts

The unit’s pins are found at the backplane of the 7180M chassis. The 7180M chassis backplane incorporates
eight slots. Pinouts from the 9-pin connector at each slot are sent through the backplane assembly to the two
25-pin D-connectors, J12 and J13, and one 9-pin connector, J11. Any monitor voltages to be measured may be
done between the chassis ground and the required pin.

For more information about pinouts, see

Appendix 4 Pinout Charts and Diagrams on page 45.

Figure 17 7180M Chassis rear view

Figure 18 7180M Chassis Pin numbers

3.4.1 7180M Alarm Connector Pinouts [J12]

Pin No. Function Name Slot No.

1 RF Alarm RfAlm1 1
2 RF Alarm RfAlm2 2
3 RF Alarm RfAlm3 3
4 RF Alarm RfAlm4 4
5 RF Alarm RfAlm5 5
6 RF Alarm RfAlm6 6
7 RF Alarm RfAlm7 7
8 RF Alarm RfAlm8 8
9 Optical Alarm OptAlm1 1
10 Optical Alarm OptAlm2 2
11 Optical Alarm OptAlm3 3
12 Optical Alarm OptAlm4 4
13 Optical Alarm OptAlm5 5
14 Optical Alarm OptAlm6 6
15 Optical Alarm OptAlm7 7
16 Optical Alarm OptAlm8 8
17
18
19
20
21 Standby Power Supply SPSNOP
22 Standby Power Supply SPSCOM
23 Main Power Supply MPSNOP
24 Main Power Supply MPSCOM
25 Chassis Ground GND

7180M Chassis Pinouts

Table 6 7180M Alarm Connector [J12} Pinouts

7226H Interfacility Link Installation and User’s Guide page 23
Foxcom proprietary information

7180M Chassis Pinouts

3.4.2 7180M Monitor Connector Pinout [J13]

Pin No. Function Name Slot No.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

Table 7 7180M Monitor Connector [J13] Pinout

RSSI Monitor RSSI1 1
RSSI Monitor RSSI2 2
RSSI Monitor RSSI3 3
RSSI Monitor RSSI4 4
RSSI Monitor RSSI5 5
RSSI Monitor RSSI6 6
RSSI Monitor RSSI7 7
RSSI Monitor RSSI8 8
PDI Monitor PDI1 1
PDI Monitor PDI2 2
PDI Monitor PDI3 3
PDI Monitor PDI4 4
PDI Monitor PDI5 5
PDI Monitor PDI6 6
PDI Monitor PDI7 7
PDI Monitor PDI8 8
LSRI Monitor LSRI1 1
LSRI Monitor LSRI2 2
LSRI Monitor LSRI3 3
LSRI Monitor LSRI4 4
LSRI Monitor LSRI5 5
LSRI Monitor LSRI6 6
LSRI Monitor LSRI7 7
LSRI Monitor LSRI8 8
Chassis Ground GND

3.4.3 LNB Connector Pinout [J11]

Pin No. Function Name Slot No.

1
2
3
4
5
6
7
8
9

Table 8 LNB Connector Pinout

page 24 Document no. 93-005-50-A

LNB Powering LNB
LNB Powering LNB
LNB Powering LNB
LNB Powering LNB
LNB Powering LNB
LNB Powering LNB
LNB Powering LNB
LNB Powering LNB
Chassis Ground GND

1
2
3
4
5
6
7
8

3.4.4 7180M and Redundancy Switching

The 2040 Switch provides optional 1:1 redundancy switching for all
Foxcom Interfacility Links. If the customer chooses to add
redundancy switching to the link, the pin connector jumpers need to
be moved.

Detailed instructions on moving the jumpers are provided in the

Model 2040 1:1 Redundant Switch Installation and User’s Guide
(Document Number 93-005-26-A1).

7180M Chassis Pinouts

7226H Interfacility Link Installation and User’s Guide page 25
Foxcom proprietary information

7180M Chassis Pinouts

page 26 Document no. 93-005-50-A

4 Gain Control

The 7226H IFL unit requires no maintenance, but the user can
adjust the transmitter and receiver gain by 20 dB. The gain can be
between 0 to -20 dB.

All internal adjustments have been set up at the factory; the only
user adjustments are input and output RF signal levels accessible
from the front panel and described in the following sections. A
detailed procedure for optimizing the gain control is provided in
section

If you do not have a signal generator or spectrum analyzer, adjust
the gain according to the following procedure.

To adjust the Transmitter Gain:

1. Set the input power to the expected power level.

2. Set the nominal RSSI signal at 3.5 V ± 0.5.

To adjust the Receiver Gain:

1. Set the input power to the expected power level.

2. Set the nominal RSSI signal at 5.0 V ± 2.

2.7 Aligning the Fiber Optic Link on page15.

7226H Interfacility Link Installation and User’s Guide page 27
Foxcom proprietary information

page 28 Document no. 93-005-50-A

5 Troubleshooting

The 7226H Interfacility Link unit was tested before it left the factory.
However if you are experiencing difficulties see the list below for
possible solutions. If you are still experiencing problems, attempt to
isolate and identify the malfunctioning unit before consulting
Foxcom’s technical support.

Problem Possible Cause

1. Laser LED not on a.No DC power to the unit. Possible
power supply problem or AC power
input problem. Check the power
supply fuse.

b. Verify LSRI monitor is between -4.8

and -4.2VDC. If not, laser may have
overheated. Disconnect power or
remove plug and allow to cool. Try
again with better airflow.

c. If an optical power meter is avail-

able, measure the optical power out
of the transmitter. The power
should between 2 to 5 mW [+3 to 7
dBm]. If an optical power meter is
not available, use another receiver
to determine if there is optical
power emerging from the transmit­ter (use a 5 meter jumper cable). If
there is no optical power, then the
transmitter unit is malfunctioning.

If any or all the above are not within
the guidelines, the transmitter unit is
faulty.

2. Lack of RF signal

present at Receiver,
yet optical power is
functioning.

a. If the unit has an LNB drive option,

verify correct LNB bias is coming
down the center of the RF connector
at the transmit site.

b. Verify dish is pointed and correctly

receiving satellite signals.

Conclusion: If signal still not present
then transmitter input stage amplifier
is defective. Contact factory.

Table 9 Troubleshooting the Transmitter

7226H Interfacility Link Installation and User’s Guide page 29
Foxcom proprietary information

3. No optical power,
LED not
illuminated

a. No optical power, LED not

illuminated.Transmitter is not
functioning, see above.

b. There is a break or severe bend in

the fiber optic cable. Use an optical
power meter or another functioning
receiver unit to verify optical power
coming down the fiber.

c. Optical power too low, too many

splits, too long a distance (thus
exceeding optical budget). System
may still function without LED illu­minated although at reduced perfor­mance.

4. Optical power light
illuminated with
disconnected optical

Leaky photodiode or DC Amplifier
offset. Unit may still function,
otherwise contact factory.

input.

Table 9 Troubleshooting the Transmitter (Continued)

page 30 Document no. 93-005-50-A

Appendix 1 Cleaning Fiber Optic Connections

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

The unit has an FC/APC angle polished optical connector for very
high optical return loss performance. The units are specified into
single mode fiber i.e. 9/125 micron core diameter. Full performance is
specified only for low return loss optical plant - meaning that the
fiber must be fusion spliced and all connections or splices must have
a return loss greater than -60 dB. With these guidelines in mind, link
lengths beyond 20 kilometers (DFB based products) can be achieved
with high performance. Specific performance and/or design
assistance is available by request from Foxcom.

If there is low/no signal or noisy signal at a Foxcom module, the
connector should be cleaned. Dirt on the inside connector tip can
impair the flow of light causing problems in signal transmission.
Foxcom modules are sealed but dirt can occasionally enter during
installation and alignment.

The input and output optical ports of all Foxcom equipment are
known in the fiber optic world as bulkhead ports. Foxcom uses
FC/APC connectors.

The following materials are representative of the types of cleaning
materials that should be used for cleaning the fiber optic ports and
connectors. They are available from several suppliers.

Description Manufacturer

Kim wipes Kimberly Clark
Cletop Automatic Connector Cleaner Cletop
fiber optic Swab Cletop or FIS
fiber optic Compressed Air Chemtronics

Table 10 Cleaning materials

Wiping clothes should be made of lint free alcohol free nonabrasive
materials. Swabs should have a tightly wrapped tip and be talcum­free. For removing dust from receptacles, a canned compressed gas is
recommended. Do not use commercial compressed air because of risk
of contamination.

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Appendix 1.1 Cleaning Procedures for FC/APC Connectors

Use a Kim Wipe to gently wipe the end face surface of the connector.
Alternatively a Cletop automatic connector cleaner can be used.

Figure 19 Wiping the connector with a Kim wiper

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

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Appendix 1.2 Cleaning Procedure for FC/APC Bulkhead Ports

Caution Clean the transmitter and receiver optical ports only when

there is evidence of contamination or reduced performance.

Appendix 1.2.1 Swab Method

Using a clean fiber optic cleaning swab, gently wipe out the optical
port. Discard the swab after use.

Figure 21 Cleaning the Optical Port

Figure 22 Cleaning the Optical Port [2]

Appendix 1.2.2 Compressed Air Method

Using the extension tube of the compressed air, blow into the port to
remove any dust or debris. Do not allow the tube to touch the bottom
of the port. Do not use commercial compressed air due to potential oil
contamination.

Note To prevent contamination, the optical ports should be

connected or covered with a dust cap at all times.
Use dry air or nitrogen only.

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Appendix 2 Installing a Standalone Unit

To install the 7226HT-STD or 7226HR-STD Standalone:

1. Place the 7226H unit on the standalone flange, matching the
holes.

2. Using four screws (#4 or #6) secure the unit and the flange to the
wall.

3. Apply AC power to the standalone power supply unit.

4. Connect the 7226HD unit to the power supply. The Laser LED
should be lit.

All remaining steps are the same as in the product manual. See
sections

Receiver on page 10.

2.1 Setting up the Transmitter on page 8 and 2.3 Setting Up the

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Appendix 3 The 2380 Relay Adapter

The following section describes how to install the 2380 Relay adapter
onto the 7180M Chassis. The 2380 Relay adapter assembly provides
dry contact output signals as an option to the standard open collector
signals available on the 7180M chassis backplane.

If the 2380 Relay adapter is ordered separately from the 7180M
chassis, it must mounted by the user. The 2380 is mounted directly
over the connectors on the 7180M backplane, as shown below.

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Appendix 3.3 Installing the 2380 Relay Adapter

Appendix 3.3.1 Parts Required for Installing the 2380

•2380 Relay Adapter

•Two pin guides

•Four one-inch screws

•Screw driver

Appendix 3.3.2 Mounting the the 2380 Relay Adapter

1.Very Important: Disconnect the electricity before performing

this procedure.

2.Make sure that you have all the needed equipment.

3.Install the pin guides.

Figure 23 Installing the guide pins

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4. Mount the unit onto the pin guides.

Figure 24 Mounting the adapter

5. Mount the four screws. The screws must be installed in the order
shown in

Figures 25 and 26.

Caution Use only the mounting screws

provided by Foxcom.Other
screws can permanently
damage the unit!

Figure 25 Mounting the screws [1]

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Figure 26 Mounting the screws [2]

Figure 27 Mounted 2380

6. Connect the cables.

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Appendix 3.4 2380 Dimensions and Front Panel Label

Figure 28 2380 Dimensions

Figure 29 2380 Fr ont Label

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Appendix 3.5 2380 Adapter Pinouts

Pin Number Function Name Slot Number

1 Alarm NOP1 1
2 Alarm COM1 1
3 Alarm NOP2 2
4 Alarm COM2 2
5 Alarm NOP3 3
6 Alarm COM3 3
7 Alarm NOP4 4
8 Alarm COM4 4
9 Alarm NOP5 5

10 Alarm COM5 5

11 Alarm NOP6 6
12 Alarm COM6 6
13 Alarm NOP7 7
14 Alarm COM7 7
15 Alarm NOP8 8
16 Alarm COM8 8
17
18
19
20
21
22
23 Main PS Alarm MPSA
24 Standby PS Alarm SPSA
25 Power Supply Comm. PSCOM

T able 11 2380 Adapter Pinouts [J2]
Note Alarms in Pins 1 through 16 function if there is either an RF or

Optical signals failure.

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Pin Number Function Name Slot Number

1 R SSI Monitor RSSI 1
2 R SSI Monitor RSSI 2
3 R SSI Monitor RSSI 3
4 R SSI Monitor RSSI 4
5 R SSI Monitor RSSI 5
6 R SSI Monitor RSSI 6
7 R SSI Monitor RSSI 7
8 R SSI Monitor RSSI 8

9 PDI Monitor PDI1 1
10 PDI Monitor PDI2 2
11 PDI Monitor PDI3 3
12 PDI Monitor PDI4 4
13 PDI Monitor PDI5 5
14 PDI Monitor PDI6 6
15 PDI Monitor PDI7 7
16 PDI Monitor PDI8 8
17 LSRI Monitor LSRI1 1
18 LSRI Monitor LSRI2 2
19 LSRI Monitor LSRI3 3
20 LSRI Monitor LSRI4 4
21 LSRI Monitor LSRI5 5
22 LSRI Monitor LSRI6 6
23 LSRI Monitor LSRI7 7
24 LSRI Monitor LSRI8 8
25 Chassis Ground GND

Table 12 2380 Monitor Connector Pinout [J4]

Figure 30 2380 Pin numbers

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Appendix 4 Pinout Charts and Diagrams

Figures 31 through 36 give detailed pinout information for the
7180M chassis, the 2380 Relay Adaptor and the 2040 RF Switch.

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 Transmitte r and Receiver units only . . . 53

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

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Figure 32 7180M with 2040 RF Switch Pinout

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

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

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

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

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