+---------------+---+---+------------------------------+------------------+
| SYSTEM        |   |   |                              |                  |
| SUPPORT       |   |   |                              |                  |
| DIRECTIVE     |   |   |                              |                  |
+---------------+---+---+------------------------------+------------------+
| **ATCBI5**    |   |   |                              | **               |
|               |   |   |                              | SSM-ATCBI5-001** |
+---------------+---+---+------------------------------+------------------+
|               | * |   |                              |                  |
|               | * |   |                              |                  |
|               | 6 |   |                              |                  |
|               | 3 |   |                              |                  |
|               | 6 |   |                              |                  |
|               | 0 |   |                              |                  |
|               | * |   |                              |                  |
|               | * |   |                              |                  |
+---------------+---+---+------------------------------+------------------+
|               |   |   |                              |                  |
+---------------+---+---+------------------------------+------------------+
| **System      |   | U |                              | -   TEMPORARY    |
| Support       |   | P |                              |     SWITCHING    |
| M             |   | D |                              |     FOR ATCBI5   |
| odification** |   | A |                              |     AND BI6      |
|               |   | T |                              |                  |
|               |   | E |                              | -   ATCBI5 BEAM  |
|               |   | T |                              |     NARROWING    |
|               |   | O |                              |                  |
|               |   | P |                              | -   REMOVE       |
|               |   | R |                              |     DURING       |
|               |   | O |                              |     ATCBI6       |
|               |   | V |                              |     COMMISIONING |
|               |   | I |                              |                  |
|               |   | D |                              |                  |
|               |   | E |                              |                  |
|               |   | R |                              |                  |
|               |   | F |                              |                  |
|               |   | S |                              |                  |
|               |   | W |                              |                  |
|               |   | I |                              |                  |
|               |   | T |                              |                  |
|               |   | C |                              |                  |
|               |   | H |                              |                  |
|               |   | I |                              |                  |
|               |   | N |                              |                  |
|               |   | G |                              |                  |
|               |   | B |                              |                  |
|               |   | E |                              |                  |
|               |   | T |                              |                  |
|               |   | W |                              |                  |
|               |   | E |                              |                  |
|               |   | E |                              |                  |
|               |   | N |                              |                  |
|               |   | T |                              |                  |
|               |   | H |                              |                  |
|               |   | E |                              |                  |
|               |   | A |                              |                  |
|               |   | T |                              |                  |
|               |   | C |                              |                  |
|               |   | B |                              |                  |
|               |   | I |                              |                  |
|               |   | 5 |                              |                  |
|               |   | A |                              |                  |
|               |   | N |                              |                  |
|               |   | D |                              |                  |
|               |   | A |                              |                  |
|               |   | T |                              |                  |
|               |   | C |                              |                  |
|               |   | B |                              |                  |
|               |   | I |                              |                  |
|               |   | 6 |                              |                  |
|               |   | A |                              |                  |
|               |   | T |                              |                  |
|               |   | A |                              |                  |
|               |   | R |                              |                  |
|               |   | S |                              |                  |
|               |   | R |                              |                  |
|               |   | - |                              |                  |
|               |   | 4 |                              |                  |
|               |   | S |                              |                  |
|               |   | I |                              |                  |
|               |   | T |                              |                  |
|               |   | E |                              |                  |
|               |   | S |                              |                  |
+---------------+---+---+------------------------------+------------------+
|               |   |   |                              |                  |
+---------------+---+---+------------------------------+------------------+
|               |   |   |                              | **DRAFT**        |
+---------------+---+---+------------------------------+------------------+

1.  **PURPOSE.** This system support modification (SSM) provides
    installation information for the ATCBI-5/BI-6 switch at ARSR-4
    sites. This switch will provide each beacon system access to the
    MODE-S En Route Antenna during the period between the installation
    and commissioning of the ATCBI-6. After the commissioning of the
    ATCBI-6 and subsequent decommissioning of the ATCBI-5 this
    modification should be removed.

    This SSM also provides information for the removal of the ARSR-4
    Enroute Mode-S Antenna Beam Narrowing modification currently
    installed. The functionality of this modification is part of the
    switch and should be removed from the back of the MODE-S En Route
    Antenna.

    This modification will minimize the amount of downtime required to
    switch between each beacon system during the test and evaluation
    period prior to the commissioning of the ATCBI-6.

2.  **DISTRIBUTION.**

    a.  This SSM is distributed to selected offices and services within
        Washington headquarters, the William J. Hughes Technical Center,
        the Mike Monroney Aeronautical Center, regional Airway
        Facilities divisions, and Airway Facilities field offices having
        the following facilities/equipment: ARSR-4 with the ARSR-4
        Enroute Mode-S Antenna Beam Narrowing Modification.

    b.  An electronic version and distribution report of this SSM are
        available on an Intranet site located at
        **http://aos-ext.amc.faa.gov/** under the "Technical
        Documentation" heading.

    c.  To obtain additional hard copies of this publication, contact
        Printing & Distribution Team, AMI-700B, at (405) 954-6892.

3.  **WITHDRAWALS.** None.

4.  **REFERENCES.**

    a.  Order 6340.27, Change 5, Chapter 6, ARSR-4 En Route Mode-S
        Antenna Beam Narrowing.

    b.  Configuration Control Decision (CCD) No. N24613. ARSR-4
        ATCBI-5/BI-6 RF Switch.

    c.  System Manual for MSSR System 80804/001 for FAA ATCBI-6.

    d.  ATCBI-6 SITE ACCEPTANCE TEST SPECIFICATION TE04-024.

5.  **BACKGROUND.** The ARSR-4 Enroute Mode-S Beam Narrowing
    modification suppresses the Sum pattern of the ARSR-4 En Route
    Mode-S Antenna beyond the 3 dB points to maintain an effective beam
    width of 2.4 degrees. This helps reduce the occurrence of beacon
    track jumps by reducing the average runlenght and consequently
    overlapping of beacon replies. This modification also splits the
    control path into both the control and difference ports to the
    antenna for side lobe suppression. The reduced beam width and
    splitting of the control channel would be detrimental to the normal
    operation of the ATCBI-6.

6.  **APPLICATION.** This modification applies to all ARSR-4 sites with
    the ARSR-4 Enroute Mode-S Antenna Beam Narrowing Modification and
    have a current installation of the ATCBI-6 in progress.

7.  **MATERIALS REQUIRED.** The following material is required to modify
    each site:

[Description]{.underline} [NSN]{.underline} [Quantity]{.underline}

a\. ATCBI-5/BI-6 switch None 1

> b\. ANDLDF4-50A, ½\" Foam None As required\
> Heliax 50 ohm Coax
>
> c\. ANDL4NM, N-Male for 1/2\" foam Heliax None 16\
> or equivalent connector

d\. Mounting Hardware None As required

e.  MODE-S En Route Antenna, Cable None 3\
    Assembly (SLS Filter to Array Bulkhead)\
    part 118752-4. (Two may already be in place)

f.  MODE-S En Route Antenna, Cable None 3\
    Assembly (RJ to Array Bulkhead)\
    part 588R730H0X where X = 7,8 and 9. (Two should already be in
    place)

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8.  **SOURCE OF MATERIALS.** TBD .

9.  **SPECIAL TOOLS AND TEST EQUIPMENT REQUIRED.**

    a.  Network Analyzer or PPM 1 each

    b.  MX-6A Card. 5998-01-419-9133 1 each.

10. **PROCEDURE TO BE PERFORMED BY.** Raytheon TSSC personnel will
    perform the installation of the switch with field maintenance
    personnel making the necessary changes to and certifying the
    ATCBI-5.

11. **WHEN MODIFICATION IS TO BE PERFORMED.** When most practical during
    the installation of the ATCBI6.

12. **ESTIMATED TIME REQUIRED.** Two persons, 10 hours per facility.

13. **DISPOSITION OF SURPLUS PARTS.** After removal the switch boxes
    should be sent to METI Warehouse, 4027 Will Rogers Parkway, Oklahoma
    City, Ok 73108.

14. **PROCEDURE.**

    a.  Mount the switch box on the cable tray approximately 3 feet from
        the equipment end of the main feeder cable. For clarification
        the main feeder cable here is likely to be Andrews Heliax
        VXL7-50 with Polyphasor TVSS devices on each end. The switch box
        may be mounted to the main cable tray with unistrut and threaded
        rod as shown below.

        ![](media/image1.wmf)

    b.  Build three LDF4-50 cables long enough to connect the ATCBI6
        RFCO to the equipment end of the main feeder cable and also
        connect the RFCO to the bottom of the switch box without
        exceeding the bend radius of the LDF4-50. Connect the three
        cables between the sum, difference and control jacks of the RFCO
        and the switch box BI-6 inputs (bottom left). From this point on
        these cable will be referred to as the "BI-6 pigtails".

    c.  Build three LDF4-50 cables long enough to connect the top of the
        switch box to the equipment end of the main feeder cable. These
        three cables should be as close as possible to the same length
        to make phasing easier. Connect the three cables between the
        sum, difference and control main feeder cables and the switch
        box antenna jacks (top). From this point on these cable will be
        referred to as the "temporary pigtails".

    d.  Build two LDF4-50 cables long enough to connect the top of the
        BI-5 cabinet couplers to the bottom of the switch box. Connect
        the two cables to the BI-5 sum and control jacks on the switch
        box (lower right). Do not connect to the BI-5 at this point.
        From this point on these cable will be referred to as the "BI-5
        pigtails".

    e.  Have ARTCC personnel run a 30 QARS report and retain a copy
        (baseline). Try to minimize the time between step 14e and 15 to
        reduce the effect of changing traffic patterns or weather on the
        QARS report.

        **\*\* Note: down time required. \*\***

    f.  Turn off the RF for both channels of the ATCBI-6, ATCBI-5 and
        ARSR4. Take appropriate actions to stop antenna rotation and
        enter the radome.

    g.  Disconnect the BI5 Sum channel from the top of the cabinet and
        again at the array bulkhead. Using a 1030 MHz input measure the
        line loss from the top of the cabinet to the array bulkhead.
        Record the result. \_\_\_\_\_\_\_\_\_\_.

    h.  Remove existing narrowing modification from the back of the
        antenna.

        1.  Remove the 2 dB fixed attenuator, 3 dB splitter and cables
            W51A and W51B from the back of the antenna. See figure 2 for
            locations.

            ![](media/image2.wmf)

            Figure 2 - Array Bulkhead Cables with Beam Narrowing
            Modification

        2.  Connect cable W52 (part 118752-4) between the Difference
            bulkhead mount and the difference filter. Connect cable W51
            (part 118752-4) between the SLS bulkhead mount and the SLS
            filter. See figure 3 for details.

            ![](media/image3.png){width="3.8694444444444445in"
            height="3.754166666666667in"}

            Figure 3 -- Array Bulkhead Cables after Beam Narrowing
            Modification Removal

    i.  Ensure three RF cables P/N 588R730H0X where X = 7, 8 and 9 are
        connected between the upper rotary joint channels 1 thru 3 or 4
        thru 6 and the array bulkhead jacks (sum, difference and SLS)
        see Table 1. Cable 14W1/588730H07 is the sum, cable
        14W2/588730H08 is the difference and cable 14W3/588730H09 is the
        SLS, The sum can be left disconnected from the array bulkhead
        jack. The sum and SLS cables should be already in position.

  --------------------------- ------------------- ---------------------------
  [Channel]{.underline}       Upper [RJ           Lower RJ [Jack]{.underline}
                              Jack]{.underline}   

  1                           J1                  J21

  2                           J2                  J22

  3                           J3                  J23

  4                           J4                  J24

  5                           J5                  J25

  6                           J6                  J26

                                                  
  --------------------------- ------------------- ---------------------------

Table 1 -- RF Cable Connections, Antenna Array to Rotary Joint

j.  Ensure three RF cables are connected between the lower rotary joint
    and the switch box. The final connections should connect the switch
    box sum, difference and control switch box antenna jacks to the
    antenna array sum, difference and SLS bulkhead jacks respectively.

k.  Ensure the all three switches within the switch box are set to the
    ATCBI-5 setting.

l.  Using a 1030 MHz input measure the line loss, for the new BI5 Sum
    path, from the top of the cabinet to the array bulkhead. Record the
    results. \_\_\_\_\_\_\_\_\_\_.

m.  Reconnect the sum cable to the array bulkhead.

n.  Connect the BI-5 pigtails to the sum and control directional
    couplers at the top of the BI5 cabinet.

o.  Turn on the RF for both channels of the ATCBI-5 and ATCBI-6 -- as
    required.

p.  Make necessary adjustment to the BI-5 sum output power to over come
    additional line loss due to the switch box and cabling. The BI5 sum
    power should be increased from FDRF optimal values equal to the
    difference in cable loss as shown in steps g. and l.

    Example: step g reads 3.8 dB, step l reads 4.6 dB and the FDRF
    optimal sum power is 57 dBm. Then the new BI5 power will be

    57 dBm + (4.6 dB -- 3.8 dB) = [57.8 dBm]{.underline}

    **\*\* Note: Control power will/may be adjusted during step 15.
    \*\***

    **\*\* Note: Prior to phasing the BI6 path ensure adequate downtime
    remains to test the BI5 path. Steps q thru v (BI6 cable phasing) can
    be accomplished at a later time provided step 15 a. and QARS is
    reaccomplished. \*\***

q.  Turn off the RF for both channels of the ATCBI-6, ATCBI-5 and ARSR4.
    Take appropriate actions to stop antenna rotation and enter the
    radome.

r.  Disconnect the BI-6 pigtails from the switch box and the temporary
    pigtails from the equipment end of the main feeder cable. Connect
    the BI-6 pigtails to the main feeder cable.

s.  Phase the permanent BI-6 RF path according to the ATCBI6M System
    Manual. Cut the BI-6 pigtails as needed.

t.  Disconnect the BI-6 pigtails from the main feeder cable and connect
    them to the switch box. Reconnect the temporary pigtails to the main
    feeder cable.

u.  Phase the temporary BI-6 RF path according to the ATCBI6M System
    Manual. Cut the temporary pigtails as needed.

v.  Turn on the RF for both channels of the ATCBI-6 and ATCBI-5 -- as
    required.

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15. **TEST AFTER MODIFICATION.**

    a.  Using a Network Analyzer or Peak Power meter measure the Voltage
        to Standing Wave Ratio (VSWR) of the new ATCBI5 RF path. Ensure
        the VSWR is less than 1:1.5.

        **\*\* Note: While measuring the VSWR on the ATCBI5 OMNI path
        ensure a load is on both the OMNI and Difference antenna paths
        \*\***

    b.  ATCBI-5 Testing -- Refer to Order 6340.27, Change 5, Chapter 6,
        ARSR-4 En Route Mode-S Antenna Beam Narrowing step 15 for the
        testing of the ATCBI-5 portion of the switch.

        **\*\* Note: If the MX6 or PlotCD is unavailable for runlenght
        determination contact AOS230 405-954-2429 for assistance. \*\***

    c.  ATCBI-6 Testing -- This portion of the switch will be conducted
        as part of the ATCBI-6 SITE ACCEPTANCE TEST SPECIFICATION --
        Coverage and Performance Test.

16. **RESULT OF MODIFICATION.** For the ATCBI-5 this modification allows
    the average beacon runlenght to continue to be reduced by
    approximately fifty percent according to the preceding modification
    ARSR-4 ENROUTE MODE-S ANTENNA BEAM NARROWING. At the same time the
    ATCBI-6 is allowed access to the antenna unaffected by that
    modification.

17. **CHANGES TO INSTRUCTION BOOKS.** None

18. **CHANGES TO INSTALLATION DRAWINGS.** None.

19. **CHANGES TO RECORDED DATA.** Enter this SSD number, date, chapter,
    and change number on the appropriate FAA Form 6032-1, Airway
    Facilities Modification Record.

20. **Address changes.** Submit facility address, copy count, and
    additions or deletions to AFZ-600, (202) 267-8582, per Order
    1720.30.

21. **CLARIFICATION OR COMMENTS.** This chapter will be included in the
    next revision to the table of contents.

22. **RISKS.** If changes are not incorporated, unauthorized
    configuration may degrade the efficiency of the National Airway
    Systems (NAS) and the ability to maintain operations.

23. **FALLBACK PROCEDURES.** If changes are not incorporated or
    unattainable by the installer, contact AOS-200 for field support
    assistance to clarify procedures and options.

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1.  **STATUS ACCOUNTING.** Providing your equipment is listed in the
    Facility/Service Equipment Profile (FSEP), the Maintenance
    Organization has opened a Log Equipment Modification (LEM) record in
    the Maintenance Management System (MMS). Upon completion of this
    modification, you are required to close the LEM record and change
    the Maintenance Action Code (MAC) to a "G" if the modification was
    completed or a "W" if the modification is not applicable. In the
    event that your equipment is not listed in the FSEP, it is your
    responsibility to open the LEM record upon receipt/completion of
    this Modification. Verify that an "N" is in the "REP COD" field to
    ensure that the log entry will be upwardly reportable to the
    national database for National MOD Tracking. The data is to be
    entered into the LEM as follows:

##  **FAC/SERV: ATCBI** {#facserv-atcbi .unnumbered}

# *Editor will verify that a valid equipment type is provided by the author from FSEP web site at URL*

[***http://interweb.faa.gov/ats/aaf/aop/200/fsep/index.htm***](http://interweb.faa.gov/ats/aaf/aop/200/fsep/index.htm)

##  **LOC/IDENT: 52AD** {#locident-52ad .unnumbered}

Editor will verify that the author has provided valid information
indicating where the modification is ACTUALLY being installed according
to FSEP data with how many modification kits are being issued:

**1. [By Facility Identification Codes (FAC]{.underline})** Use when ALL
sites for a system will actually perform the modification. Identify ALL
4-letter FACs listed in FSEP from URL
***[http://interweb.faa.gov/ats/aaf/aop/200/fsep]{.underline}***

**2. [By Site Identification (SID)]{.underline}** Use when site specific
or only a few sites actually perform the modification. Identify the SID
or list the SIDs as they exist in the FSEP at URL
***[http://aftechnet.faa.gov/]{.underline}***

On AFTECHNET toolbar, select APPLICATIONS then select Facility Service
and Equipment Profile (FSEP) to open the search form. At the Facility
Type field, select your facility type then at the Responsibility Code
field select, Only Federal Facilities then select Search to create the
report.

**SHORT NAME: SYS**

**Order No.: SSM-ATCBI5**

Documentation Services will put this information in at Start New
Documents State.

**Chapter: 001**

Documentation Services will put this information in at Start New
Documents State

##  **Change: XXX** {#change-xxx .unnumbered}

Editor will verify that the author has selected one of the following
change types:

1.  **DB** (database)

2.  **HW** (hardware)

3.  **SW** (software)

4.  **B** (software and hardware)

5.  **D** (documentation)

6.  **I** (informational release)

**[Red words should be removed from this paragraph by composition at
composition state.]{.underline}**

25. **RECOMMENDATIONS FOR CHANGES.** Forward any recommendations for
    changes to this directive through normal channels to the National
    Airway Systems Engineering Division, AOS-200, Operational Support.

Richard A. Thoma

Acting Program Director for Operational Support

+-----------------+-----------------------------------------+---------+
| **LIST OF       |                                         |         |
| APPENDIXES AND  |                                         |         |
| ATTACHMENTS**   |                                         |         |
+-----------------+-----------------------------------------+---------+
| > **ITEM**      | **DESCRIPTION**                         | **QUA   |
|                 |                                         | NTITY** |
+-----------------+-----------------------------------------+---------+
| > APPENDIX 1    | APPENDIX 1 Test and Evaluation Gold     | 1       |
|                 | Standard considerations                 |         |
+-----------------+-----------------------------------------+---------+
| > ATTACHMENT 1  | SSD TABLE OF CONTENTS                   | 1       |
+-----------------+-----------------------------------------+---------+
| > ATTACHMENT 2  | INSTRUCTION BOOK CHANGES                | 1       |
+-----------------+-----------------------------------------+---------+

# **APPENDIX 1. TEST AND EVALUATION GOLD STANDARD CONSIDERATIONS** {#appendix-1.-test-and-evaluation-gold-standard-considerations .unnumbered}

1.  **Purpose -** This appendix communicates the type of Gold Standard
    testing that was accomplished on this directive, SSM-ATCBI5-007. The
    scope of the testing conducted on this modification and test results
    are provided. Any additional unique testing or evaluation beyond the
    normal modification tests, that needs to be conducted during the
    field installation, is included in the Test Limitation paragraph.

2.  **Scope -** This modification has completed development and systems
    testing. The system test was conducted at the facility with the
    system modification baseline at software and hardware modifications
    through Order 6750.27. Key site testing of this modification was
    conducted at two other facilities with the same baseline as the
    system test.

3.  **Results -** The system test was conducted at the XXXXXXX ATCBI5
    facility during periods of both peak and normal target load over a
    period of 4 days with customer representatives validating the user
    interfaces. All system specialist user screens on the MDTs including
    the RMM functions were exercised and validated. [(Provide any
    additional data that convey what conditions, length, type of
    analysis or other factors, which have a bearing on the thoroughness
    of the testing)]{.mark}. The system test was successful and
    completed on XX/XX/XXXX

Key site testing of this modification was conducted at the facilities.
These sites were selected to evaluate the modification at facilities
that had the least and the maximum number of Display Processor Units.
Additionally, both remote and local antenna configurations were
evaluated. [(Provide any additional data that convey what conditions,
length, type of analysis or other factors, which have a bearing on the
key site testing.]{.mark}

4.  **Test Limitations -** This modification was tested and validated in
    all known configurations and no additional unique testing is
    required.

## **OR** {#or .unnumbered}

**Test Limitations -** This modification was tested in all variations of
the ATCBI5 facilities except the two other configurations. Additional
testing as indicated in the below table needs to be conducted as
indicated.

  -------- ------------ ----------------- --------------- ------------- ---------------
  Item     User         On-site Test      Test Anomalies  Operational   Remarks
  number   (tester)                                       Impact        

  1\.      System       Perform the split Other           4 hours of    Both AT and
           specialist   screen capability configuration   system down   system
                        test in the       adds additional time needed   specialists
                        attachment        displays                      will be
                                                                        required to
                                                                        conduct the
                                                                        test

  2\.      System       Perform the       Other           2 hours of    Both AT and
           specialist   independent mode  configuration   system down   system
                        test in the       adds additional time needed   specialists
                        attachment        displays                      will be
                                                                        required to
                                                                        conduct the
                                                                        test
  -------- ------------ ----------------- --------------- ------------- ---------------

ATTACHMENT 2. INSTRUCTION BOOK CHANGES