05_140R2024R0017_Part18_of_18_missing_pages_0005.pdf

(x)

140R2024R0017 x x

1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted ; or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGEMENT TO BE

RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR

OFFER. If by virtue of this amendment you desire to change an offer already submitted , such change may be made by letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

x

Sacramento CA 95825-1898 2800 Cottage Way, Room E-1815

R20

Division of Acquisition Services Regional Office Mid-Pacific Region Bureau of Reclamation

01/17/20250005

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

12. ACCOUNTING AND APPROPRIATION DATA (If required) is not extended.is extended, Items 8 and 15, and returning

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended , by one of the following methods: (a) By completing

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

FACILITY CODE CODE

10B. DATED (SEE ITEM 13)

10A. MODIFICATION OF CONTRACT/ORDER NO.

9B. DATED (SEE ITEM 11)

9A. AMENDMENT OF SOLICITATION NO.

CODE

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code)

7. ADMINISTERED BY (If other than Item 6)CODE 6. ISSUED BY

PAGE OF PAGES

4. REQUISITION/PURCHASE REQ. NO.3. EFFECTIVE DATE2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO. (If applicable)

1. CONTRACT ID CODE

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

11/29/2024

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority) appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

E. IMPORTANT: Contractor is not is required to sign this document and return _______1___________ copies to the issuing office.

ORDER NO. IN ITEM 10A.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

The purpose of Amendment 05 is for the following:

1) Add pages initially omitted from SAM.gov record 04_140R2024R0017_Part18 of 18. Potential

Offerors are instructed to add the remaining pages to 04_140R2024R0017_Part18 of 18

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)15A. NAME AND TITLE OF SIGNER (Type or print)

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 15B. CONTRACTOR/OFFEROR 16C. DATE SIGNED

(Signature of person authorized to sign) (Signature of Contracting Officer)

Matthew T. Byrne

STANDARD FORM 30 (REV. 11/2016)

Prescribed by GSA FAR (48 CFR) 53.243

Previous edition unusable

Except as provided herein, all terms and conditions of the document referenced in Item 9 A or 10A, as heretofore changed, remains unchanged and in full force and effect .

X o The SPD shall be designed for link type (for example, data speed and voltage levels).

o The SPD shall be of solid state construction.

o The SPD should be listed to UL 497 or shall be qualified GR 1089 o The SPD shall protect all cable conductors or short unused conductors to earth.

o The SPD shall be bonded to earth

Inter-building Cabling Links (Motorola R56 2017 Section 7.7.5) Site links may originate in one building via telephone service provider, fiber, microwave and so on and be distributed to another building to the communications room/shelter via copper conductors (for example, STP). The site links in the originating building shall be surge protected as described in the section for each link type. The inter-building cabling shall use Shielded Twisted Pair (STP) cables or a type of optical fiber link.

The following are the inter-building cabling surge protection and installation requirements:

-building cabling shall terminate to a demarcation point.

shall be protected with a device meeting the specifications of a secondary Surge Protective Device (SPD) shall meet the following requirements:

o The SPD shall be designed for link type (for example, data speed and voltage levels).

o The SPD shall be of solid state construction.

o The SPD shall be listed to UL 497 or qualified GR 1089.

o The SPD shall protect all cable conductors or short unused conductors to earth.

o The SPD shall o The SPD shall be designed for link type (for example, data speed and voltage levels).

o The SPD shall be of solid state construction.

o The SPD should be listed to UL 497 or shall be qualified GR 1089.

o The SPD shall protect all cable conductors or short unused conductors to earth.

o The SPD shall

Inter-building Computer Network Protection (Motorola R56 2017 Section 7.7.7.1) Computer networking cables (STP) are sometimes run from one building to another. A typical application might be from the network management terminal. Computer networking cabling entering or exiting the communications building/shelter shall be surge protected.

The following are the surge protection and installation requirements for inter-building computer network cabling:

-building computer networking cable shall be Shielded Twisted Pair (STP).

-building computer network cabling shall terminate to an appropriate Surge Protective Device (SPD).

shall be protected with a device meeting the specifications of a secondary SPD:

o The SPD shall be designed for link type (for example, Ethernet).

o The SPD shall be of solid state construction.

o The SPD shall be listed to UL 497 or qualified GR 1089.

o The SPD shall protect all cable conductors or short unused conductors to earth.

o The SPD shall shall accept shielded connectors, making an electrical bond to the connector shields.

Alarm Circuits (Motorola R56 2017 Section 7.7.8) Sites commonly have external alarm circuits for monitoring site equipment (for example, generator, gates, motion detectors, and so on). These alarms typically terminate to an M66 or 110 punch block near the Primary Bonding Bar (PBB). These alarm circuits shall be surge protected using a secondary Surge Protective Device (SPD) as follows:

shall terminate to an M66 punch block or similar demarcation point within 61 cm (24 in.) of building entry.

shall be located as close as practicable to the PBB. This is to help maintain single-point grounding integrity.

shall be installed on all alarm circuits (inputs and outputs) entering or exiting the communications site. The secondary device shall meet the following requirements:

o The SPD shall be designed for the purpose.

o The SPD shall be of solid state construction.

o The SPD shall be listed to UL 497 or qualified GR 1089.

o The SPD shall protect all cable conductors or short unused conductors to earth.

o The SPD shall shall e bonded to the Primary Bonding Bar (PBB) or entry point Secondary Bonding Bar (SBB).

IMPORTANT: Unused alarms circuits that enter or exit the building shall be surge protected or shorted to earth at the demarcation point (M66 punch block).

Closed Circuit Television and Security (Motorola R56 2017 Section 7.8) Each Closed Circuit Television (CCTV), cable television and security system cable entering a communications facility shall be surge protected. Where an RF cable entry port is available, CCTV and similar cables shall enter the facility through the cable entry port. Where an RF entrance panel is not available, cables shall enter as close as practicable to the point where the power and telephone conductors enter a facility.

Cable shields shall be the Primary Bonding Bar (PBB) or entry point Secondary Bonding Bar (SBB). SPDs shall be installed within 61 cm (24 in.) of the point where the cable(s) enter the communications facility. The ground terminal of the SPD shall be bonded to the internal

SPDs shall be selected based on the application. Fixed camera systems can be AC or DC powered; Pan Tilt Zoom (PTZ) cameras are typically 24 or 110 V AC powered. Consult with the security provider or the manufacturer before selecting the SPD for this application. It is highly recommended to protect PTZ cameras at both ends of the cable run.

RF Surge Protection (Motorola R56 2017 Section 7.11) Coaxial cables, waveguides and wireless broadband cables typically enter the equipment area through a dedicated building entrance panel. RF coaxial cables shall be protected from surges with an RF Surge Protective Device (SPD). All coaxial cables entering the building (or communications room in a larger building) shall be surge protected, NFPA 780-2017, section 4.20.6).

The RF SPD shall be installed within 61 cm (24 in.) of entry into the communications facility (or communications room in a larger building).

IMPORTANT: Unused coaxial cables entering the communications facility (or communications room in a larger building) shall be terminated at the RF SPD with a short or 50 ohm load.

Tower Electronics (Motorola R56 2017 Section 7.11.4) Tower electronics (for example, a tower-top amplifier or tower mounted amplifier, access points, wireless routers and so on) shall - shall be protected from surge events. Appropriate Surge Protective Devices (SPD) shall be installed and bonded to the tower as close as practicable to the tower mounted electronics and within 61 cm (24 in.) of the entry point to a communications facility.

GPS Receiver Protection (Motorola R56 2017 Section 7.11.5) Global Positioning System (GPS) receivers are often a part of modern communications systems. GPS receivers are used for site timing and synchronization. Failure of a GPS receiver can render the radio site or system unusable. Surge Protective Devices (SPDs) shall be installed on GPS signal cables within 61 cm (24 in.) of the point of entry to the equipment area. The design of the GPS receiver system typically includes an amplified GPS antenna unit and low-loss transmission line. The GPS antenna includes a GaAsFET device wideband RF amplifier. The RF amplifier is fed with low-voltage DC, typically 5V (but as high as 15 VDC). The GPS receiver system can incorporate a multiplex arrangement using a single coaxial transmission line, which also serves to couple the incoming GPS signal from the antenna to the receiver or by RS422 twisted pairs.

IMPORTANT: Before selecting a coaxial SPD, verify that the GPS receiver can operate with an SPD in the coaxial line. In some installations, the GPS receiver will require optimization to compensate for the delay caused by the SPD and the variations in the length of the transmission line (which is site specific). The GPS antenna transmission line shall be cut to the proper length (or as instructed by the GPS receiver manufacturer), and excess transmission line shall not be coiled either inside or outside the shelter, room or equipment area.

Tower Lighting (Motorola R56 2017 Section 7.11.6) Tower light AC power, alarm and control cables shall enter the shelter, building or equipment area within or adjacent to, the antenna transmission line entry port location. The grounding conductors of the SPDs shall be bonded to the PBB or SBB.

Some tower lighting manufacturers offer an optional surge suppression device that may be installed within the tower lighting control unit. Although this device may be suitable for protecting the control unit circuitry, it does not provide adequate protection to inductively coupled energy that may enter the shelter, building or equipment area through the tower light power or control conductors.

Suitable surge suppression devices offering protection for AC power, control and modem circuits are available from several surge suppression device manufacturers. Devices shall be selected based on the specific application and requirements specified in this section.

Minimum SPD Requirements for Dispatch Centers and Operator Positions (Motorola R56 2017 Section 7.11.7.1) shall be installed at the electrical service entrance for the facility according to this chapter.

shall be installed at the AC service panels in the equipment room and dispatch operations room, if applicable, according to this chapter.

k mounted PDUs) shall be required for critical equipment at each dispatch connection point shall be bonded to the operator position bonding bar.

shall

IMPORTANT: ESD is generally the cause for many complaints generated by dispatch personnel. Measures to control ESD shall be taken when designing for this environment. Most ESD problems are mitigated through proper bonding and grounding Techniques, relative humidity control (between 40% and 55% relative humidity is ideal), attention to the resistivity of flooring and furniture, and selection of video display terminals (LCD or LED instead of CRT). See Appendix C, DC Powered Outdoor Equipment (Motorola R56 2017 Section 7.12.1) Radios, Low Noise Amplifiers (LNA), Tower Mounted Amplifiers (TMA), Point-to-Point (PTP) broadband and other electronics installed on communications towers, along roof lines or on utility poles shall incorporate on-board or external DC surge protection located within 0.6 m (24 in.) of the protected load, or as close as practicable. Protection for Power over Ethernet (PoE) DC conductors may be incorporated into a common SPD for the twisted pair cable. DC conductors (PoE or separate conductors) shall be surge protected with an SPD within 61 cm (24 in.) of entering the communications facility according to this

-2017, Articles 800, 820 and 830.

Recommended DC SPD Technology and Location (Motorola R56 2017 Section 7.12.3) The recommended DC SPD should be constructed using a Metal Oxide Varistor (MOV), Silicon Avalanche Diode (SAD) or an SAD/MOV matrix device.

DC systems can carry a considerable amount of energy. The SPD voltage rating shall be closely coordinated with the circuit voltage and polarity of the battery plant.

Key specifications of the DC SPD are as follows:

connected SPD.

or -48VDC service, 35V to 55V maximum for +24VDC service.

To maximize the effectiveness, the SPD should be installed at the equipment to be protected. Additional devices are recommended for each DC equipment load at the site.

8.1 Radio Spectrum Administration (NTIA Manual of Regulations and Procedures for Federal Radio Frequency Management 2021, Section 2.3.6)

1. The Federal Government regards the radio frequency spectrum as a world resource in the public domain; consequently it shall adopt policies and measures to ensure that this resource is used in the best interest of this Nation, but with high regard to the needs and rights of other nations.

The supervision and administration of Federal use of the radio frequency spectrum shall have the objective of assuring that such use is efficient, effective, and prudent.

2. The Federal Government considers the radio frequency spectrum to be a vital national resource. Any rights of United States users to operate on any radio frequency are rights held by the United States as a whole. Such rights may be transferred by the Federal Government from one user to another, as required in the overall national interest.

3. The Federal Government considers that the basic guide to follow in the normal assignment of radio frequencies for transmission purposes is the avoidance of harmful interference and the use of frequencies in a manner which permits and encourages the most beneficial use of the radio frequency spectrum in the national interest.

4. Within the jurisdiction of the Federal Government, use of the radio frequency spectrum for radio transmissions for telecommunications or for other purposes shall be made by Federal Government stations only as authorized by the Assistant

Secretary.

5. In view of the limitations of the usable radio frequency spectrum, and to ensure the best possible return from the use thereof, in time of peace, the Federal Government shall require all users to:

a. justify any except an emergency request for radio frequencies prior to the assignment or use of such frequencies;

b. confirm periodically the justification of continued use;

c. employ up-to-date spectrum-conserving techniques as a matter of normal procedure; and

d. ensure the ability to discontinue the electronic functioning of any emission system including satellites when required in the interest of communication efficiency and effectiveness.

6. In recognition of the congestion of that portion of the radio frequency spectrum which is suitable for longdistance communication, only in exceptional circumstances shall frequencies below 30 MHz be assigned in the domestic fixed service. 7.

Normally, radio frequencies shall be assigned in the following order:

a. Frequencies used primarily, predominantly, and directly for national security and defense, for purposes which are vital to the safety of the Nation.

b. Frequencies used primarily, predominantly, and directly to safeguard life and property in conditions of distress.

c. Frequencies used primarily, predominantly, and directly to safeguard life and property in other than conditions of distress where other means of communication are not available.

d. Frequencies used in scientific research and those used in services that have no adequate means of rapid communication, when such use is considered to be necessary or desirable in the national interest.

e. Frequencies used for all other purposes, the assignment of which must be judged upon the merits of the intended use.

8.2 General Site Environmental Requirements (Motorola R56 2017 Section 8.2) A properly designed communication site uses the following preventive measures to minimize and eliminate locations where radio signals can mix and create intermodulation frequencies or broadband noise.

shall not be used because it can corrode and cause intermodulation signals.

should be removed from the site.

s and Corrosion shall not be used unless they are stainless steel.

very likely source of broadband noise.

Forms of Interference (Motorola R56 2017 Section 8.3.2) Interference can have many sources. All forms of interference must be monitored regularly for reliable communication.

Interference is normally classified as internal or external. Internal interference is generated within the components of the system. External interference is generated externally and radiates into the affected system. Internal interference can be prevented with good radio system design practices. All external interference must be eliminated at the source.

Examples of interference include internal and external intermodulation (IM), transmitter sideband noise (TN), receiver desensitization (RD), co-channel interference and passive intermodulation (PIM). These are briefly described as follows.

IM: normally caused locally within the system or on-site. This form of interference is caused by the mixing of multiple transmitters producing an on frequency carrier.

o Internal IM is generated within system components. This can occur within the transmitter power amplifier, within the transmitter combining isolator and within the receiver when strong off-frequency signals are allowed to enter the front end of the receiver and mix.

o External IM is generated external to the transmitter or receiver system components. This interference can be produced in non-linear components on the site. Rusty tower joints, rusty fences, guy wires, corroded connectors and inadequate grounding can also be sources of intermodulation. In all cases the only solution for external intermodulation is to find the source and eliminate it.

Transmitter Sideband Noise: All transmitters emit some noise. Transmitters should have bandpass filtering added to reduce this noise and protect collocated receivers .

Receiver Desensitization:

on a closely spaced channel. Unlike the other types of interference, there are no audible indications of interference; there is only a reduction in receiver sensitivity.

Co-channel: Multiple transmitters within the same coverage area assigned the same frequency.

Adjacent Channel: Interference from users on a frequency assignment next to the operating frequency.

PIM: Another type of intermodulation, evident in passive system components. Common mixing points are connectors, cables, surge protective devices, combiners and antennas. Use of high quality (PIM rated) components can mitigate these issues.

8.3 Antenna Network Components (Motorola R56 2017 Section 8.3.4) Follow these best practices during design when selecting antenna network components:

devices and combiners with PIM specifications.

-16 DIN connectors (PIM rated) on all transmit network components.

shall not be used.

o Try to mount transmit antennas on top of tower.

o Mount transmit antennas as far apart as practicable.

o Mount transmit antennas on different mounting structures.

o Mount antennas as far from tower as practicable.

o Mount the receive antenna as far from the transmit antenna as practicable.

8.4

8.5

Exposure Evaluation (Motorola R56 2017 Section A.2.3) Evaluating possible RF exposure levels can be done using both theoretical models and physical testing. Modeling a site allows the tester to be aware of situations and anticipate locations where close physical examination is required.

The maximum exposure allowed by the FCC limits is 100% of the MPE, averaged over both time and body height. To provide a margin of tolerance to ensure compliance, in many cases an additional factor of 3 dB or 50% should be adopted as an action threshold. Any levels above 50% of the applicable MPE shall have action procedures to maintain compliance.

8.6 Engineering Considerations (Motorola R56 2017 Section A.3)

Antenna Elevation (Motorola R56 2017 Section A.3.1) One common technique for reducing the RF levels expected on large roof tops is to elevate the antennas above the roof.

Elevating the antennas raises the EME fields above the roof and reduces the power density to which an individual at roof level will be exposed. The results of elevating antennas are illustrated in Figure A-8. These data are based on the EME fields produced by an 850 MHz SMR antenna. Ten 150 Watt transmitters through a combiner drive the antenna. The resultant 550 Watts of power is fed into a 3.96 m (13 ft) omni antenna. This type of antenna configuration is not unusual on rooftops.

The resultant exposure possible can be above the MPE when the antenna is mounted at the roof level. From the chart, fields in excess of 200% of the Occupational/Controlled MPE are encountered within 305 mm (1 ft) of the antenna. While this seems extremely close, a technician walking down the center of an antenna grid with 1.2 m (4 ft) centers will be 610 mm (2 ft) from any antenna at any time. At a distance of 610 mm (2 ft) from this antenna mounted at roof level, it is possible for the exposure to be over 100% of the same MPE. If this situation is compounded with several antennas having the same power density, the levels in this walking area could be above the MPE. For this reason every effort should be given to reducing the fields at the roof level. The most effective technique for reducing the fields on a building, while maintaining constant radiated power, is raising the antenna. Raising the antenna 1.2 m (4 ft) above the roof reduces the EME field strength at the roof level to about 50% of the MPE at 305 mm (1 ft) from where the antenna was. If the antenna is raised 1.8 m (6 ft) above the roof the fields are reduced more than 90%.

The most effective technique for reducing EME levels is elevating antennas on buildings and extending antennas away from the tower.

Extending Antennas Away From Towers (Motorola R56 2017 Section A.3.2) Tower contractors climbing the tower must pass through fields created by active antennas on the tower. Antennas mounted on short sidearms or mounted directly to the tower produce high levels of exposure to tower climbers. It is a good engineering practice to mount omnidirectional antennas a minimum of 1.52 m (5 ft) from the tower.

Collocated Broadcast Transmitters (Motorola R56 2017 Section A.3.3) Areas with broadcast transmitters can have fields created by grating lobes from the antenna or fields developed directly by the main radiating beam. On broadcast-only sites these are the only field that must be considered in EME analysis. On collocated sites, the EME fields are a combination of the fields generated by two-way transmitters and broadcast stations. If the exposure from each contributor is considered independently and then added, the total MPE situation can be evaluated. The fields from the broadcast transmitter act like a blanket covering the area. If the fields from a preexisting broadcast station create a level of 15% Occupational/Controlled MPE there is only 85% of the MPE budget remaining. This requires the levels from the twoway transmitters to be lower than what otherwise would be required to maintain compliance. In some conditions extra cooperation between the broadcasters and two-way licensees may be necessary to ensure site compliance. In the areas that receive grating lobes from the broadcast transmitters, careful measurements must be done before compliance can be analyzed.

Consideration must be given to anyone working on antenna systems. If a person must climb into the fields of the broadcast antenna, coordination ahead of time must be done to reduce the transmitter power. Special consideration and care shall be utilized when a person is required to climb through a field known to exceed 100% Occupational/Controlled MPE. On some sites the broadcast towers are mounted adjacent to the two-way tower. In this situation the fields from the broadcast transmitter will be very intense on the two-way tower. Maintenance activities must be coordinated when the broadcast station is collocated. The FCC requires broadcasters to cooperate during maintenance situations; however, they may elect special times to conduct maintenance.

Location of Directional Antennas (Motorola R56 2017 Section A.3.4) Directional antennas in the horizontal plane present a focused pattern for maximum coverage into a specific area. Even in the near field the levels in the beam of the antenna can be significantly higher than behind or on either side. Consideration must be given to the area and location the antenna is directed. Directional high-powered transmitting antennas should be located where the energy in excess of the Occupation/Control MPE is directed away from any area frequented by workers. Additionally directional antennas shall not be installed where they can produce fields higher than the General Population/Uncontrolled MPE in uncontrolled areas.

Antenna Selection (Motorola R56 2017 Section A.3.5) Antenna selection is important because it is directly linked to EME levels. The requirement for more antennas within a given horizontal space has created new designs of antennas. Within one radome several antennas can now be stacked on top of each other. The standard configurations are double (two), triple (three) and Quad (four) co-linear arrays. Aperture length directly affects the power density created. In the near field, a 4.6 m (15 ft) antenna driven with 500 Watts will have one-third the power density of an antenna 1.52 m (5 ft) long. Remember that near the antenna, the power density is related to the surface area of a cylinder placed over the antenna. A cylinder having one-third the height will have one-third the surface area and, hence will result in three times the power density. This is complicated even more when the 1.52 m (5 ft) antenna is placed with other antennas in a common radome. This allows the power density, created by each antenna, to combine and increase the potential exposure of an individual. The technique of using triple and quad antennas is becoming increasingly popular as the space on hilltops and towers becomes scarcer. Paging transmitters, sectored antenna systems and digital networks represent only a few of the services requiring individual antennas. There is a finite antenna density that can be accomplished within a given area. Creative methods of combining or increasing the antenna structures must be developed. Consideration should be given to connecting lower power transmitters to the bottom portion of triple and quad radome antennas.

IMPORTANT: Understanding the EME environment for a given site requires that an inventory of all generators of RF energy and the EME exposure potential be maintained for all facilities. This requires standardized documentation practices and regular updating.

8.7 General Procedures (Motorola R56 2017 Section A.4.6)

General procedures relate to normal practices that are common to all sites. These can be found posted at all sites on the are:

shall have Electromagnetic Energy (EME) awareness training o All workers entering a RF controlled area shall understand their potential exposure and steps they can take to reduce their EME exposure. Awareness is a requirement of all workers. This includes not only field engineers, maintenance technicians and site designers, but also others such as site acquisition personnel, building management and service oriented personnel (such as electrical, telephone, elevator and air conditioning mechanics as well as roof repair, painting and window washing crews).

o of their risk of exposure. Awareness training increases worker sensitivity to potential exposure, thereby assisting proper compliance regarding exposure limits. Awareness can be given in different formats, some may be video, formal classroom and informal discussions.

Only personnel who have been trained and understand the EME situation and other safety requirements associated with site work shall be allowed access without escorts. When untrained individuals access the sites, trained escorts are required.

signs o This guideline emphasizes the importance of observing and understanding the instructions on posted signs at the transmitter site. All safety signs play an important role in any safety program and just as any of these signs convey a specific message related directly to safe work in a particular environment, postings at transmitter sites are no o It is important that these signs be understood and obeyed, to assure EME exposure below the FCC guidelines. The requirement for RF protective clothing for workers is another precaution that could be identified on signs designating areas of potential exposure in excess of FCC limits.

nnas are active o Because most telecommunications transmissions are intermittent, the status of many transmitters that may be operating at a particular site will be unknown. It is important to assume that all antennas may be energized and to maintain a safe working distance from each of them.

o Only with special instruments to detect the presence of RF energy can it be determined a particular antenna is not energized at any given moment. While EME measurement surveys may have been performed on the site, these surveys do not assure that a specific antenna is not active at a given time.

o Before working on an antenna, workers must ensure that all attached transmitters are deactivated. Most antennas at a transmitter site are being used for important communications. They may be used for emergency and safety purposes like fire protection, rescue dispatch and police communications. Although all attached transmitters must be turned off before touching and working on an antenna, in any case touching or working on an antenna shall not be attempted before contacting the owners or operators.

o Coordinating with the individuals responsible for use of the transmitter will make sure that turning off the equipment will not cause a serious disruption of the service. Sometimes, this coordination may mean that the work will have to be performed at night or in the early hours of the morning. Lockout/Tagout tags should be used to make sure someone else does not inadvertently turn on the transmitter while work on the antenna is being performed.

o Studies have shown that the EME fields close to two-way radio transmitting antennas can be strong enough to exceed the limits specified by the FCC guidelines. A 914 mm (3 ft) clearance is a practical approach to assure that exposure remains within FCC limits. This ensures a distance is always maintained unless work is required on an antenna.

o Work on a specific antenna shall only be accomplished after the attached transmitters have been turned off. A small increase in distance from an antenna can have a substantial effect on reducing the EME exposure. This is particularly important when working near other active antennas. This also applies when doing work on roof or tower mounted equipment like air conditioners, tower lights or window washing rigs.

o When moving about at the transmitter site workers shall avoid stopping near any antenna; they should continue on until they reach an area that is removed from their immediate vicinity. If they are going to take a break from work or have lunch, they should select a place on the roof that will provide as much distance between them and the nearest antennas as practicable.

o When climbing a tower, workers should select rest points away from antennas. Workers should always try to keep below or behind antennas to minimize their exposure to the main beam of the antenna. By continuing to move past high EME fields the average exposure will be minimized.

o Special care must be exercised when working on or very near antennas. Although the EME fields cannot be sensed directly, transmitter activity can be detected close to an antenna with a personal RF monitor.

o Wearing such a monitor will allow workers to ensure that all connected transmitters have been turned off before they begin maintenance. As they approach an antenna, if the monitor alarms, they shall get away from the antenna, determine which transmitters are still on and disable them.

o Some work at antenna sites involves troubleshooting and repair of the radio transmitters. The shields within transmitter power amplifiers are there to prevent strong RF fields from radiating out of the transmitter cabinet.

Operating the transmitter without shields could cause interference and exposure of the technician performing the service to EME levels in excess of the FCC guidelines.

o While shields must be removed for many maintenance tasks, they shall always be properly reinstalled before returning the transmitter to normal operation.

o At any time, transmitting antennas shall not be operated inside the equipment rooms, even for short term testing.

This includes mobile magnet mount antennas attached to the top of transmitter cabinets as temporary installations.

o Using transmit antennas inside equipment rooms can increase the exposure to EME levels above FCC guidelines and create undesirable radio frequency interference.

8.7 D, E

(Motorola R56 2017 Section A.5) Various signs may be required on antenna sites. The minimum requirement is to post an EME caution and/or warning signs, as appropriate, wherever EME levels can exceed those associated with a green zone. This sign shall be posted in a location that can be easily viewed by individuals that enter the areas of concern. Some areas that may be affected are building tops, towers, areas around broadcast, and so on. This assures notice and understanding that the area has active RF transmitters. The sign shall conform to the ANSI standards.

Examples of signs that have been implemented in the United States are shown in this section.

Site Guidelines The site guidelines are posted inside the equipment room to make all workers aware of the normal requirements for site operation. The major intent is to ensure that compliance is maintained at the site. Having the sign visually available informs and reminds all personnel and others who have proper access of the rules for the site. This also qualifies as awareness information.

Notice The notice sign is used to distinguish the boundary between the General Population/Uncontrolled and the Occupational/ Controlled areas. This boundary will usually be the fence for the property, gate entrance or roof door to the equipment room.

The limits associated with this notification must be less than the Occupational/Controlled MPE. All sites have standard guidelines posted that must be obeyed and understood by all workers. These guidelines will ensure the area is maintained below Occupational/Controlled MPE. EME awareness training is recommended for all workers.

Caution

The caution sign identifies RF controlled areas where RF exposure can exceed the Occupational/Controlled MPE. Generic guidelines apply in all situations and will be posted at all sites; however, site specific guidelines may be associated with some areas to ensure work is always performed in compliance with the FCC guidelines. Such site specific guidelines may require reduction of RF power before work begins or the use of RF protective clothing. In all cases workers shall not enter and work in these areas without understanding and obeying the necessary procedures. All authorized workers for RF controlled areas must have EME awareness training.

Warning

The warning sign denotes the boundary of areas with RF levels substantially above the FCC limits, normally defined as those greater than ten (10) times the Occupational/Controlled MPE.

Telecommunication contractors and employees shall not enter these areas unless special procedures are followed. These situations typically are associated with broadcast transmitters operating at high power. If work is required in these areas, the broadcast transmitter must be shut down for the duration of the maintenance. Engineering evaluation must be performed to determine the proper special procedures required before this area can be entered.

8.8 Antenna and Dish Antenna Loading (Motorola R56 2017 Section 2.12.6) Go to (link)

Grounding Roof-Mounted Antenna Masts and metal Support Structures (Motorola R56 2017 Section 4.11)

All roof-mounted antenna masts and metal support structures shall be grounded.

In new construction, provisions should be engineered into the building design for effective roof-mounted antenna mast and support structure grounding. Typically this will include a grounding point or multiple grounding points, with at least two direct connections to the building's common grounding electrode system. The direct connection to the building's grounding electrode system may be made using effectively grounded structural building steel (metal frame/framework) (preferred) and/or down-conductors sized according to Table 4-5 or lightning protection system conductors sized according to Table 4-3 and Table 4-4.

Other engineered antenna mast and support structure grounding systems may include metallic antenna support structures that are directly and effectively bonded to effectively grounded structural building steel (metal frame/framework).

Where a lightning protection system is installed on the building, roof-mounted antenna masts and support structures shall be bonded to the lightning protection system (IEC 62305-3:2010, section E.5.2.4.2.6, and NFPA 780-2017, section 4.17). The conductor shall be of the same size as the Main Roof Perimeter Lightning Protection Ring (FAA STD-019e, section 4.2.3.5.5, and NFPA 780-2017, section 4.17). Conductor bonding shall be made using exothermic welding, listed irreversible high compression fittings or other fittings listed for use in lightning protection systems. No additional grounding shall be required of roof -mounted antenna masts and support structures where bonded to a lightning protection system.

Where a lightning protection system is not available, roof-mounted antenna masts and metal support structure shall be grounded by directly bonding to the building's grounding electrode system or to a supplemental grounding electrode system

(FAA STD-019e, section 4.2.3.5.5). Bonding to the grounding electrode system should use effectively grounded structural building steel (metal frame/framework) where available. Where effectively grounded structural building steel (metal frame/ framework) is not available, bonding to the grounding electrode system shall use at least two down conductors sized according to Table 4-5 or lightning protection system conductors sized according to Table 4-3 and Table 4-4, where practicable (ATIS- 0600334.2013, section 8.2). The down-conductors shall be physically separated as much as practicable.

Where effectively grounded structural building steel (metal frame/framework) is not available and the use of two down-conductors is not practicable, the use of a single down-conductor may be used only if approved by an engineer. In this case a larger conductor or lightning protection system conductor should be used. Available water piping systems may also be used as a grounding down-conductor, but should only be used under the advice of an engineer.

Bonding to the structural building steel (metal frame/framework) shall be made using exothermic welding, listed irreversible high-compression fittings or other fittings listed for use in lightning protection systems. See NFPA 780-2017, section 4.19, and associated subsections for additional information regarding the use of structural building steel (metal frame/framework) as a main grounding conductor.

9.1

9.2

Facility Readiness (Motorola R56 2017 Section 9.3) Following all construction work, both exterior and interior, the site and facility (structure or shelter) shall be in a suitable condition for installation of communication equipment. The following must be complete prior to communication equipment installation:

shall have final backfill and grade.

shall be free of trackable debris.

shall be free of excessive dust or debris.

shall have all refuse related to the installation tasks removed before occupancy.

shall be completed before the start of the installation activity.

shall provide a reasonably waterproof environment within the equipment installation area (Telcordia GR-1275 issue 3).

shall be free of dust, dirt and foreign substances.

shall be protected from dirt, dust and debris during installation, removal, maintenance and construction activities.

If equipment is to be covered or wrapped, appropriate anti-static material shall be used. If a protective barrier is constructed, any heavy gauge plastic material may be used, provided the material does not come into contact with the equipment.

shall generate minimal amounts of airborne dust. Vacuum cleaners should be equipped with High Efficiency Particulate Arrestor (HEPA) filters.

shall not come into contact with the equipment or be stored in the equipment room. Some examples of these materials include plastics and polystyrene.

laws, ordinances, regulations and codes (building, fire, and so on) shall be adhered to during the course of an installation, removal, maintenance or construction.

the requirement in this manual, the installer shall identify this conflict and contact the site owner and/or project manager for resolution.

9.3 Level, Plumb and Squareness (Motorola R56 2017 Section 9.6) shall be level, plumb and square.

quipment level shall be tested on a known flat surface in at least two directions to verify accuracy.

Equipment Anchoring (Motorola R56 2017 Section 9.7) Anchoring is the mechanical fastening of communications equipment to suitable locations using hardware acceptable for the application. Although every installation is unique, certain methods for anchoring shall be adhered to for all installations.

Typically, at least four anchor points shall be used on each item of equipment mounted to the floor. The only exception is when the equipment manufacturer supplies other than four mounting points.

information and requirements (GR-63-CORE section 4.4.2).

The requirements for securing racks and cabinets are as follows:

shall be anchored in order to prevent movement or tipping. The movement of racks or cabinets can damage equipment and cabling.

laced on C-channel tracks or wooden pedestals.

shall meet standards set forth in NEBS (Network Equipment Building Systems) TR-64 and

ASTM (American Society for Testing Materials) 488-90 for earthquake compliance.

r anchors shall be secure and shall not protrude above the floor level (the part that goes into the hole, not the bolt).

shall be the proper types in accordance with equipment specifications. Types and sizes installed shall be in accordance with support requirements of intended load.

shall not be loose or so tight as to prevent expansion. Anchors shall be torqued to manufacturer's specifications.

shall be filled with an appropriate concrete fill after shields and anchors are removed.

Mounting on Concrete Floors (Motorola R56 2017 Section 9.7.1) CAUTION: Before drilling into concrete floors, contact the building engineer and/or site owner to determine floor construction (for example, prestressed concrete, and so on). If engineering as-built drawings are not available for the site, X-rays of the area to be drilled for the anchors are required to determine the location of structural components and rebar.

General Requirements (Motorola R56 2017 Section 9.7.1.1) Equipment racks or cabinets should be positioned and anchored to the floor using preferred mounting methods. Figure 9-12 shows proper concrete mounting techniques and materials. In general, observe the following considerations:

shall be used. The preferred method for anchoring racks or other ancillary equipment to concrete floors is to use flush-mount expansion anchors properly sized for the application. Flush mount expansion anchors do not extend above the surface of the floor and provide an easy bolt down. They also provide the required pullout and shear strength. If at a later time equipment needs to be moved, flush mount expansion anchors do not get in the way.

buried in the concrete. If preferred or acceptable, wedge-type stud anchors may be used.

shall be zinc-plated carbon steel for standard applications, galvanized steel for mildly humid or corrosive environments, and yellow zinc or stainless steel for humid, highly corrosive or acidic environments. Minimum bolt diameter shall be 10 mm (0.375 in.) with 12 mm (0.5 in.) preferred. Anchor embedment depth should be at least 76 mm (3 in.) to provide good tensile and shear strength. Follow manufacturer's instructions for depth reduction when rebar is encountered. A heavy duty washer should be part of the anchor assembly to ensure the equipment is secure.

Isolated Mounting (Motorola R56 2017 Section 9.7.1.3) Isolated mounting is recommended to prevent a secondary path to earth (ground loop and stray current) through the concrete floor and is required for the installation of certain equipment. In these cases, expansion anchors are inserted into the concrete floor. However, isolation of the equipment rack is ensured using an insulating plate and hardware.

Note: The isolation plate should be made of an insulating material such as fiberglass or polypropylene plastic that will not deteriorate in varied temperature ranges.

Note: Isolated mounting is recommended when equipment racks are bolted to a concrete floor that is in direct contact with earth. This is to help prevent ground loops and stray currents. If the equipment is placed on vinyl or other non-conductive floor tile, no insulating plate is required; however, insulating washers or sleeves are required.

Note: If ESD rated floor tile is being utilized, an insulating plate and washer/sleeve are required.

9.3 A General Considerations for Layout, Work Areas and Spacing (Motorola R56 2017 Section 9.4) In order to allow for adequate equipment maintenance and personnel safety, equipment spacing guidelines shall be followed.

When laying out a site, consider all code requirements for spacing and for the most efficient use of space. Special attention shall be given to future expansion with regard to cable runway heights, electrical outlet placement and equipment placement.

Spacing Requirements (Motorola R56 2017 Section 9.4.1) Proper spacing of equipment is essential for efficient use of the room area, ease of maintenance and safety of personnel. The following specifications have been established to meet NFPA® codes and the American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) standards. Any local regulations, as applicable, shall also be followed.

IMPORTANT: Communications equipment shall not be installed within the required clear working space of an electrical panelboard. The required clear working space shall remain free of debris and shall not be used for storage. For equipment operating above 150 V to ground, consult NFPA 70-2017, Article 110.26, for spacing requirements

9.3 B Spacing Requirements for Electrical Power Equipment (AC or DC) (Motorola R56 2017 Section 9.4.1.1) shall be provided around all electrical panelboards and/or DC power plants.

shall be the width of the panelboard(s) or 762 mm (30 in.), whichever is greater, and permit opening of any doors or hinged panels to 90° (NFPA 70-2017, Article 110.26). The same requirements apply to DC power plants, batteries and uninterruptible power systems (UPS).

shall be clear and extend from the grade, floor or platform to a height of 2.0 m (6.5 ft) or the height of the equipment, whichever is greater. Other equipment that is associated with the electrical installation and is located above or below the electrical equipment shall be permitted to extend not more than 150 mm (6 in.) beyond the front of the electrical equipment.

9.3 C Spacing Requirements for Other Equipment (Motorola R56 2017 Section 9.4.1.2) shall be required at front, side and (where applicable) rear for servicing interior mounted air conditioners (NFPA 70-2017, Article 110.26, ASHRAE).

shall be maintained in front of all…