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DAS Installation Testing

Standards

Operating Policies and Procedures Manual

American Tower Corporation

Document No.:

DAS—Test Standards

Rev.:

7

Title:

DAS Installation Testing Standards

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Contents

1 Fiber Testing .................................................................................................................................................................... 3

1.1 Introduction to Testing ........................................................................................................................................... 3

1.2 Test Requirements .................................................................................................................................................. 3

1.3 Required Tools/Operational Procedure ................................................................................................................ 15

1.4 Submittal Process .................................................................................................................................................. 35



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1 Fiber Testing

1.1 Introduction to Testing

In accordance with an American Tower Corporation (ATC) standard, each strand of fiber used in the construction of an

in-building distributed antenna system (IDAS) or an outdoor distributed antenna system (ODAS) system must be tested.

This section assumes that the reader has a technical understanding of fiber-optic tools and testing. The purpose of this

section is to ensure that fiber iOLM or OTDR testing are performed and documented per ATC standards.

1.2 Test Requirements

In a DAS application, it is important that the fiber be tested per the ATC specification. This test must be performed at

both 1330 nm and 1550 nm for singlemode fiber, and at 850 nm and 1300 nm for multimode fiber, and the test must be

performed in both directions on each fiber strand. This test is also intended to be performed after DAS installation and

prior to commissioning. A current calibration certificate and individual equipment certification must be submitted with

results.

6.2.1 Required Tests

Network Type Fiber Type Elements to Be

Qualified

Test

Wavelengths

Test Directions ATC-

Accepted

Test

Equipment

IDAS

Singlemode

- End-to-end

insertion loss

- 1310 nm

- 1550 nm - Both directions

- iOLM

Multimode

- End-to-end

insertion loss

- 850 nm


- OTDR

ODAS Singlemode

- End-to-end

insertion loss

- Splice loss

- 1310 nm


- iOLM

Table 1 – Required characterization tests



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6.2.2 Passing Requirements

For IDAS networks, the ATC requires that each strand loss be less than 1.5 dB and all the elements (including: connector

loss, connector reflectance and splices loss), must pass the thresholds values below established in Table 4.

Table 4 below summarizes the passing requirements for the different DAS applications:

Network

type

Wavelength Index of

Refraction

Splice

loss

Connector

Loss

Connector

Reflectance

Total

loss per

fiber

strand

Loss per

kilometer

Launch and

receive fiber

length

IDAS

- 1310 nm

- 1550 nm

1,473 for all

wavelengths

- Same

fiber type

< 0.2 dB

- Different

fiber

type* <

0.6 dB

0.55 dB

APC

(green)=

- 55 dB

UPC (blue)

= -45 dB

< 1.5 dB N/A

≥ 150 m

(492’)

- 850 nm

- 1300 nm

< 1.5 dB N/A

ODAS - 1310 nm

- 1550 nm

1,473 for all

wavelengths

See loss

per

kilometer

0.3 dB/km

(@1550

nm) plus

0.5 dB per

connector

pair

present

Table 2 – Fiber-optic passing requirements

* When testing existing/older DAS system

iOLM configuration file to use:

• ATC_iDAS_SM_APC-ver.1.2.iolmcfg

• ATC_iDAS_SM_UPC-ver.1.2.iolmcfg

• ATC_oDAS_SM -ver.1.1.iolmcfg

NOTE: If you have a fiber pair with UPC (blue) connector, use UPC (blue) “ATC_iDAS_SM_UPC-ver.1.2.iolmcfg” file in

order to apply the correct reflectance thresholds.



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6.2.3 Labeling

IDAS:

A requirement of iOLM/OTDR testing is that a table must be filled out for submission. The readings must be recorded on

the instruments, and a summary table must be included for the overall distance of the strand and for the strand loss

expressed in dB. Labeling of the strand must comply with the design document. In general, labeling is carried out as

follows:

• Receiving Remote ID

• Fiber pair lettered A to F

• Upload (UL) or download (DL) strand

Figure 1 – ATC IDAS fiber-strand labeling

Example: The correct labeling for the tested fiber highlighted in green in Figure 17 would be as follows: 1-1_B_UL.



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An alternative labeling is accepted further to testing using EXFO’s iOLM test instrument. Using this labeling convention

along with the FastReporter 2 post-processing reporting software will allow you to automatically generate the summary

table required to submit test results. Figure 2 shows the alternative labeling that is to be used for testing performed with

the iOLM.

Figure 2 – ATC IDAS fiber-strand labeling applicable to testing with an iOLM

Figure 19 shows the files names that would be automatically generated when testing the fibers from the tube towards

the receiving remote 1-1.

1-1_1_1

1-1_1_2

1-1_2_1

1-1_2_2

1-1_3_1

1-1_3_2

1-1_4_1

1-1_4_2

1-1_5_1

1-1_5_2

1-1_6_1

1-1_6_2

1-1_1_1

1-1_1_2

1-1_2_1

1-1_2_2

1-1_3_1

1-1_3_2

1-1_4_1

1-1_4_2

1-1_5_1

1-1_5_2

1-1_6_1

1-1_6_2

Figure 3 – Applicable files names when using an iOLM



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Configuring the iOLM with the IDAS alternative labeling convention:

Prior to performing an acquisition, you can select or edit a test configuration corresponding to the link under test. The

selected test configuration will be applied to the configuration settings (thresholds, link definition parameters, job

information, etc.) in the iOLM. Once selected, the configuration will be used for all subsequent measurements.

From an existing configuration file:

First, copy the “ATC_IDAS_SM.iolmcfg” configuration file onto a USB drive, and then copy this file to the FTB-1. Using the

iOLM application, follow the steps highlighted in Figure 20 to import the configuration file:

Figure 4 – Importing an iOLM test-configuration file

This test configuration file will now be available in the list of selectable configuration files displayed on your iOLM.



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To create an ATC_IDAS_SM configuration file:

To create a new test configuration, from the iOLM application follow the steps highlighted in Figure 21.

Enter the name of the new configuration.

Figure 5 – Creating a new iOLM test configuration

Once you have created the new configuration, you will have to modify it in order to correctly define the acceptance

criteria and set the identifiers. To edit the new ATC_IDAS_SM file, simply press the Modify button available under Test

Configuration Management.

Figure 6 – Modifying the ATC_IDAS_SM test configuration



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First, you will have to define the identifier. In the Identifiers tab, enter the following identifiers in the order that they

appear in Figure 7.

Figure 7 – Configuring the identifiers for IDAS

The following increment rules must be applied to each identifier:

• Receiving Remote ID = Rec. Rem. ID with no increment

• Fiber Pair = Fiber Pair with an increment from 1 to 6

• Uplink – Downlink = UL-DL with an increment from 1 to 2

Further details on how to use these identifiers will be provided in the Required Tools/Operational Procedure section.

The remaining configuration tabs must be defined as shown in Figure 8.



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Press.

1Press.

2Press.

3Press.

4Press.

Figure 8 – Link defining; IDAS P/F thresholds definition



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ODAS:

A requirement of iOLM/OTDR testing is that a table must be filled out for submission. The readings must be recorded on

the instruments, and a summary table must be included for the overall distance of the strand and for the strand loss

expressed in dB. Labeling of the strand must comply with the design document. In general, labeling is carried out as

follows:

• HUB ID

• NODE ID

• FIBER ID

Example: The correct labeling further to testing fiber 1 in the node highlighted in green in Figure 9 would be as

follows: 347203_7_1

Figure 9 – ODAS-plant fiber route map



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Configuring the iOLM with the ODAS labeling convention:

Prior to performing an acquisition, you can select or edit a test configuration corresponding to the link under test. The

selected test configuration will be applied to the configuration settings (thresholds, link definition parameters, job

information, etc.) in the iOLM. Once selected, the configuration will be used for all subsequent measurements.

From an existing configuration file:

First, copy the ATC_ODAS_SM.iolmcfg configuration file onto a USB drive, and then copy this file to the FTB-1. In the

iOLM application, follow the steps highlighted in Figure 4 to import the configuration file.

To create an ATC_ODAS_SM configuration file:

To create a new test configuration from the iOLM application, follow the steps highlighted in Figure 10.

Figure 10 – Creating a new iOLM test configuration

Once you have created the new configuration, you will have to modify it in order correctly define the acceptance criteria

and set the identifiers. To edit the new ATC_ODAS_SM, simply press the Modify button available under Test

Configuration Management:



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Figure 11 – Modifying ATC_ODAS_SM test configuration



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First, you will have to define the Identifier. In the Identifiers tab, enter the following identifiers in the order that they

appear in Figure 12.

Figure 12 – Configuration of the identifiers for ODAS

The following increment rules must be applied to each identifier:

• HUB ID = With no increment

• NODE ID = With no increment. An optional increment could be set in this field.

• FIBER ID = With an increment from 1 to 12 (the stop limit will depend on the number of fibers present at the

node)

Further details on how to use these identifiers are provided in the Required Tools/Operational Procedure section.



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1.3 Required Tools/Operational Procedure

Network

Type

Fiber Type Elements to Be

Qualified

Test

Directions

Test Method

DAS

Singlemode

IDAS/ODAS

- End-to-end

insertion loss

- Connectors

endface

- Both

directions

1 technician

2 technicians

Singlemode

ODAS

- End-to-end

insertion loss

- Connectors

endface

- Both

directions 2 technicians

Multimode

- End-to-end

insertion loss

- Connectors

endface

- Both

directions

1 technician

2 technicians



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1.3.1 Configuring Test Instrument Documentation

iOLM IDAS:

For each test scenario described in section 6.3.2.1, we recommend that you use the following documentation procedure

when testing with an iOLM in order to automatically generate the summary table required to submit test results.

STEP-1: Select the desired test configuration:

STEP-2: Create the folders to which the test measurement will be saved. From the User Preferences menu, under the

General tab, set the default folder to which the measurement must be saved (Figure 13).



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Figure 13 – Saving folders

In order to facilitate management of the test files, it is recommended practice to create one folder for each Receiving

Remote ID and to create two subfolders for each direction (as shown in Figure 14).

Figure 14 – Saving folders and subfolders



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STEP-3: In order to correctly set the file autonaming parameters in line with the labeling conversion, and to automate

the reporting, you must configure the Identifications as indicated in Figures 15 and 16.

When testing direction AB:

Figure 15 – AB Identification configuration

When testing direction BA:

Set the

“Direction” as

B->A

These value should be set to 1

each time a new test sequence is

initiated

Job

information

Enter the Receiving

Remote ID

(same as the one

use to test during

AB direction)

Receiving

Remote ID

(ex: 1-1)

Location: Receiving Remote

Location: Headend

1 2 1 2 1 2 1 2 1 2 1 2

1 2 3 4 5 6

BA

Test

Direction

Fiber

Pair

UL or

DL

Figure 16 – BA Identification configuration



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STEP-4: Set Filename to use only Identifiers.

Figure 17 – Filename configuration



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The example below shows the test sequence for testing the tube toward Receiving Remote 1-1:

PART-1: The test instrument is located at the head-end location; direction AB and the folder used to store the results

must be set to AB.

The results would be similar to those indicated in the table below:

Test Receive Remote ID Fiber Pair UL-DL Direction File Name Saving Folder

1 1-1 1 1 AB 1-1_1_1.iOLM Receive 1-1 --> AB












Information saved in the file

Note that each time the user performs a save, all identifiers with an increment (Fiber Pair and UL-DL) will be

automatically incremented, and the file name will be automatically adjusted accordingly. In the example above, UL-DL

will be incremented twice (1 and 2) before the fiber-pair identifiers are incremented.

To view the next file name, users can click the file preview located at the bottom of the iOLM main screen:



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PART-2: The test instrument is located at the Receive Remote location; the direction is BA, and the folder for storing the

results must be set to BA.

Test

Receive

Remote ID

Fiber

Pair UL-DL Direction File Name Saving Folder

1 1-1 1 1 BA 1-1_1_1.iOLM Receive 1-1 --> BA












Information saved in the file

For this Receive Remote example, the total number of files that will be saved is 24.



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iOLM ODAS:

For each test scenario described in section 6.3.2.2, we recommend that you use the following documentation procedure

when testing with an iOLM in order to automatically generate the summary table required to submit test results.

STEP-1: Select the desired test configuration:

STEP-2: Create the folders where the test measurement will be saved. In the User Preferences menu, under the

General tab, set the default folder to which the measurement must be saved (Figure 18).

Figure 18 Saving folders

In order to facilitate management of the test files, it is recommended practice to create one folder for each HUB, to

create subfolders for each node, and to create a subfolder for the direction (as shown in Figure 19).



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Figure 19 – Saving folders and subfolders



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STEP-3: In order to correctly set the file autonaming parameters in line with the labeling conversion, and to automate

reporting, you must configure the identifications as indicated in Figures 20 and 21.

When testing direction AB (Hub to Node):

Figure 20 – AB ODAS Identification configuration

When testing direction BA (Node to HUB):

Figure 21 – BA ODAS Identification configuration



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STEP-4: Set Filename to use only Identifiers.

Figure 22 – Filename configuration



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6.3.2 Operation Procedure

6.3.2.1 IDAS - Singlemode fiber

One technician – IDAS CHARACTERIZATION OF UPLINK AND DOWNLINK – Singlemode fiber

This scenario can be accomplished by one technician equipped with the following:

- 1x FTB-1 with an iOLM module

- 4x SPSB* with an appropriate connector interface

Characterization

Parameters

Uplink Fiber Downlink Fiber

END A END B END A END B

IL From A to B (Forward)

From B to A (Reverse)

From A to B (Forward)

From B to A (Reverse)

ORL View from A (Forward)

View from B (Reverse)

View from A (Forward)

View from B (Reverse) Table 3 – IDAS characterization parameters provided with unidirectional testing

* Stand-alone pulse suppressor box.

SPSP—How It Works

Link characterization is often performed using an iOLM. However, although iOLMs have the shortest dead zones, due to

the way that loss is measured in a link, characterization of the first and last connectors is not possible unless a launch

test cable (also called a pulse suppressor box) is used. The reasons are as follows:

The loss value associated with an event is the difference between the backscattering levels measured before and after

the event. To account for the iOLM’s dead zone, obtaining a backscattering level in front of the first connector requires

inserting a certain length of fiber between the iOLM port and the first connector of the fiber under test. At the other end

of the link, the same length of fiber is added after the last connector of the receive cable.

In order to obtain an accurate, complete picture of the system’s loss—which is a critical aspect of fiber commissioning—

a launch test cable must always be used at both ends of the fiber link.



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END B �� STEP – 1

Once the connectors have been inspected as indicated in Figure 23, the technician will connect a receive fiber on the C-

UL-B and C-DL-B connectors, and then go to end A.

Note that the technician could work with just one receive fiber, but this would greatly increase the amount of back and

forth between sites A and B.

Figure 23 – One technician`Receive-box installation at END B



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END A �� STEP – 2 and 3

For step 2, the technician will connect one end of the launch box to connector C-UL-A, and connect the other end to the

iOLM port (as shown in Figure 26)

Figure 24 – One technician: Unidirectional uplink characterization

Once the acquisition is completed, the results must be saved with the right documentation (see section 6.2.3 IDAS).



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To complete testing on this fiber pair, disconnect the launch box from connector C-UL-A of the UL fiber, and then

connect it to connector C-DL-A of the DL fiber (as shown in Figure 27). Once the launch box is connected, the technician

simply presses start to launch the acquisition. Once the acquisition is completed, the results must be saved with the

right documentation (see section 6.2.3 IDAS).

Figure 25 – One technician: Unidirectional downlink characterization

Step 4- Once the tests are completed at end A, the technician installs the received box at end A.

Step 5- Next, the technician must go to end B to perform iOLM testing from end B to end A on both the UL and DL fiber.

The technician must then perform the same actions indicated in steps 3 and 4 of the previous example to conduct the

test in the opposite direction.



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Two technicians – IDAS CHARACTERIZATION OF UPLINK AND DOWNLINK – Singlemode fiber

The characterization parameters provided with bidirectional testing will be the same as those indicated in Table 5, but

the overall time needed to complete a job will be shorter, because the two technicians will not have to change locations.

Technician-1 (located at end A)


- 2x SPSB with an appropriate connector interface

Technician-2 (located at end B)





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STEP 1 – Installation of the launch / receive box and the UL fiber test

Both technicians will connect the launch/receive box on the fiber to be tested. In this example, we will start with the UL

fiber. Technician 1 will start the test from end A towards end B, and then save the results with the right documentation

(see section 6.2.3 IDAS).

Figure 26 –Two Technicians: Preparation for bidirectional UL fiber testing

While technician 1 is completing the test, the second technician can initiate the test on the other fiber (DL), and then

save the results using the same documentation described in section 6.2.3 IDAS.

STEP 2 – Installation of the launch/receive box and the DL fiber test

To test the downlink fiber, the technician must follow the same procedure indicated in step 1. Once complete, both

technicians can move on to the next pair of uplink and downlink fibers.



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6.3.2.2 ODAS - Singlemode fiber

Two technicians – ODAS CHARACTERIZATION OF UPLINK AND DOWNLINK – Singlemode fiber


the overall time needed to complete a job will be shorter, because the two technicians will not have to change locations.

Technician 1 (located at end A)



Technician 2 (located at end B)



The scenarios described below show the test sequence for testing one node (node 7 with fiber 1 to 12). The same testing

steps will have to be repeated for each node connected to the hub.



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STEP 1 – Installation of the iOLM/launch (end A)/receive box (end B)

Technician 2 will connect the receive box on the fiber to be tested, and technician 1 will connect the iOLM with the

launch box to the same fiber (as shown in Figure 30). Technician 1 will start the test from end A towards end B, and then

save the result with the right documentation (see section 6.2.3 ODAS).

Figure 27 – ODAS Step 2 test instrument connection

NOTE: As suggested in the section titled “Two technicians – IDAS CHARACTERIZATION OF UPLINK AND DOWNLINK –

Singlemode fiber,” the technicians can proceed by testing the fiber pair. In Figure 30, technician 2 could connect his

iOLM onto another fiber (e.g., Fiber 2) and the other technician could connect a receive box on this same fiber. This

method would decrease the time needed to test all of the fibers in a node.



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STEP 2 – Installation of the launch (end A)/iOLM/receive box (end B)

Technician 1 will connect the receive box onto the fiber to be tested, and technician 2 will connect the iOLM with the

launch box to the same fiber (as shown in Figure 31). Technician 2 will start the test from end B to end A, and will then

save the results with the right documentation (see section 6.2.3 ODAS).

Figure 28 – ODAS Step 3: Test instrument connection

Steps 1 to 2 must be repeated to test all the node fiber. Once all of the node fiber has been tested, technician 2 will

proceed to the next node to be tested, and repeat steps 1 to 2.



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6.3.2.3 IDAS – Multimode fiber

OTDR testing on indoor DAS can be performed as described in section 6.3.2.1. Refer to section 6.2.2 for details on

passing requirements and to section 6.2.3 for labeling requirements.

1.4 Submittal Process

Results must be inserted into an Excel spreadsheet format for submission. These results must be included with the coax

sweeps, which must be completed prior to DAS commissioning. The results must be submitted directly to the ATC

Project Manager. A calibration certificate must be included in reporting form.

IDAS submission format:

Fiber Strand Label Loss 1310 nm Loss 1550 nm

Link Length Rec. Rem.

ID

Fiber Pair

PAIR UL - DL

Forward

(dB)

Reverse

(dB)

Forward

(dB)

Reverse

(dB)

1-1 1 1 1.07 1.04 .98 .96 1208’

1-1 1 2 1.05 1.12 .87 .89 1199’

1-1 2 1 .99 .96 .84 .82 1212’

1-1 2 2 .95 .94 .82 .82 1205’

1-1 3 1 1.12 1.11 1.01 1.00 1200’

1-1 3 2 .98 .94 .90 .88 1209’

1-1 4 1 .90 .88 .81 .79 1208’

1-1 4 2 1.00 1.02 .92 .94 1199’

1-1 5 1 1.01 1.05 .91 .89 1212’

1-1 5 2 1.08 1.06 .97 .96 1205’

1-1 6 1 .98 .99 .91 .89 1200’

1-1 6 2 .89 .91 .82 .84 1209’

ODAS submission format:

Fiber Strand Label Loss 1310 nm Loss 1550 nm

Link Length HUB ID Node ID Fiber ID

Forward

(dB)

Reverse

(dB)

Forward

(dB)

Reverse

(dB)

347203 7 1 1.07 1.04 .98 .96 1208’

347203 7 2 1.05 1.12 .87 .89 1199’

347203 7 3 .99 .96 .84 .82 1212’

347203 7 4 .95 .94 .82 .82 1205’

347203 7 5 1.12 1.11 1.01 1.00 1200’

347203 7 6 .98 .94 .90 .88 1209’

347203 7 7 .90 .88 .81 .79 1208’

347203 7 8 1.00 1.02 .92 .94 1199’

347203 7 9 1.01 1.05 .91 .89 1212’

347203 7 10 1.08 1.06 .97 .96 1205’

347203 7 11 .98 .99 .91 .89 1200’

347203 7 12 .89 .91 .82 .84 1209’



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In addition to the table, reports must include a graphical representation for each strand of fiber, and for each fiber

strand, the following information must be provided:

• ATC site name

• Six-digit ATC ID

• Fiber strand label

• Test direction

• Wavelength

• Date

1.4.1 Generating the submission form using FastReporter 2

For the following section, we assume that the user has basic knowledge on how to use FastReporter 2 (FR2). Multimedia

can be found in the support section of EXFO’s website. A 30-day trial version is also available on EXFO’s website. Once

the 30-day trial period is over, a full version of FastReporter 2 will be required to ensure compliance with the ATC’s

submission requirements.

The following section focuses on how to generate a submission form based on the ATC’s requirements. At this stage, it is

assumed that test result documentation has been performed as described in the labeling section of this document. We

will also show an example using test results from only one receive remote, but you can also produce the submission

form using more than one receive remote.

In order to access to ATC’s submission report template, you must import it:

1

2



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3

4

5



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To display the same menus and views shown in this document, you must configure FR2 as follow:

Step 1 – Adjusting the file matching rule for ATC’s labeling convention:

In order to ensure that the iOLM measurement from AB and BA of a given fiber pair automatically matches, you must

adjust match rule for FR2, as shown in Figure 29. Under Project Settings � File Matching, uncheck the Support Inverted

Identifiers check box, and then click Apply. By default, this option is active.

Figure 29 – Configuring the matching rule



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Step 2 – Opening the measurements:

From the directory in which the AB iOLM measurement was saved, select all of the measurement files and load them

into the FR2 session, as demonstrated in Figure 30.

Figure 30 – Opening iOLM measurement in FR2

Once the measurements have been opened, verify that the Pass/Fail criteria are met (-1- in Figure 31). If any

measurements are tagged as Fail ( ), please verify that thresholds value are correctly set, as per the ATC

requirements. Next, make sure that the direction is correctly set (-2- in Figure 31). The direction should be set when the

measurement is performed. If, for some reason, it must be adjusted, simply right-click on the file and change the

direction (see -3- in Figure 31). Editing of the direction can be performed on a single measurement, or in batches when

multiple files are selected.

Figure 31 – Pass/Fail and direction verification

Once you have validated that the P/F and direction are correctly configured, perform the same operation with the BA

direction.



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Once all the desired files have been opened in the session (Figure 32), the report can be generated in the ATC’s

submission format.

Figure 32 – Measurements for receiving remote 1-1

Step 2 – Generating the ATC’s IDAS submission form:

In the Results � Identification window, make sure that the information displayed under “General Information”

corresponds to your work order.

Figure 33 – General identification



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To generate a report for all of the measurements in the session, simply set the active window to Files, and then, under

the Edit menu, click the Select All option. You can also simply press Ctrl+A on your keyboard.

Figure 34 –Selecting all the measurements

From the Tools menu, select the report option, and then perform the following steps:

1- Set the File Type to Excel.

2- Define the Save in patch where you wish to save the report.

3- Select the report templates.

4- Enter the file name.

Figure 35 – Generating the report as per the ATC’s submission form.



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1.5 Alternative testing method: LOOPBACK TESTING

1.5.1 Operational Procedure


the overall time needed to complete a job will be shorter, because the iOLM test will be perform in only one direction.

NOTE: The same instrument documentation should be use. The only different compare to the other testing methods

is that with loopback you will not test from location B.

Required:

Technician 1 (located at end A)



- Use ATC_iDAS_SM LOOPBACK -ver.1.0.iolmcfg

Technician 2 (located at end B)

- 1x FTB-1 or MAX-FIP with an inspection probe

- 1x SPSB 150 m (LOOP) with an appropriate connector interface

Step-1, Technician 1 will inspect the connector and connect iOLM on the Uplink fiber, to perform a test in the forward

direction. Technician 2 will inspect the connector on both the Uplink and Downlink fiber and he will connect the 150 m

loopback fiber (same fiber as the current receive fiber being use). With this test setup/configuration, the technicians will

characterize both Downlink and Uplink in one direction.

Figure 36 connecting the instruments for loopback testing – uplink fiber



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Step-2, Technician 1, will connect the iOLM to the Downlink fiber and run the test. Once completed, both technicians

will move to the fiber pair. File naming remains unchanged for the entire process.

Figure 37 connecting the instruments for loopback testing – downlink fiber

1.5.1 Generating the submission form using FastReporter 2

Using iOLM Loopback option in FastReporter 2, user will be able to separate the results at the loop location. This will

generate the same result as if the tests were performed in both directions from both ends.

Figure 38 Reporting example



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Required:

- FastReporter 2.7 of higher (http://www.exfo.com/software/exfo-apps/fastreporter-

2?platform=PC&application=FR2-FC )

- FR2-FC mandatory option

- FR2-LB mandatory option

STEP-1



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STEP-2

STEP-3



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STEP-4



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STEP-5:



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STEP-6



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STEP-7



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STEP-8:



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STEP-9

Since the measurement where perform using the ‘’ATC_iDAS_SM LOOPBACK -ver.1.0.iolmcfg’’ with 3.0 dB maximum link

loss and you now have single run fibre, you must change this threshold to 1.5 dB (image below):



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STEP-10

STEP-11

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