Attachment_B_-_Statement_of_Work.pdf

STATEMENT OF WORK

Research Reverberation and Anechoic Chambers

NB670000-19-02399

I. BACKGROUND INFORMATION

The Communications Technology Laboratory is in the process of expanding its research efforts related to spectrum sharing. This research spans a broad area covering topics associated with distributed spectrum sensing, signal propagation, interference between devices, and evaluating a device’s ability to share spectrum. As we explore each of these topics, a controlled RF environment where signals can be radiated is required. This environment ensures that its interior volume is shielded from signals radiated from outside the chamber. Such a shielded research facility can come in the form of either an anechoic chamber or a reverberation chamber.

In an anechoic chamber, the walls and ceiling inside the chamber are equipped with absorbing material such that signals radiated from within the chamber are absorbed and do not scatter (ideally). In a reverberation chamber, the opposite is true. The walls and ceiling in a reverberation chamber are designed to be reflective (metallic) at radio frequencies of interest. Most anechoic and reverberation chambers are designed, built, and used for testing pursuant to specific EMC standards (e.g., IEC 61000-4-3). However, the specifications of an anechoic or reverberation chamber that will have a research focus are slightly different than for a chamber being used for standard EMC tests, as described below. As this chamber will be used for wireless communications research, it is neither feasible nor reasonable to specify the exact application and/or measurements that will take place within the chamber.

II. SCOPE OF WORK

Using the common shielded chamber specifications as a foundation, several changes are being made that result in a chamber that is more suitable for the type of research NIST will be conducting.

Like most shielded chambers, we envision this chamber consisting of the following key components: a shielded enclosure, door allowing ingress/egress to the chamber, electromagnetic absorbing material (foam-type absorber) lining the walls and ceiling. In the reverberation chamber, there will be no electromagnetic absorbing material, but there will be two mechanical stirrers.

A fire suppression system is required for the anechoic chambers and is described in Section III, paragraph 2a. The contractor shall minimize or eliminate the use of exposed combustible materials.

For example, in cases where oriented strand board (OSB) is commonly used, we require less combustible materials instead (e.g., fire-resistant plywood). Additionally, any absorbing materials used in the chamber shall be of limited-combustibility and tested in accordance with the appropriate standards, as detailed below.

III. SPECIFICATIONS

The Contractor shall provide three (3) anechoic research chambers and one (1) reverberation research chamber that meets the following minimum technical requirements. The Contractor shall design and install the chamber, and provide training as described below.

The four chambers will be referenced as Volumes 1-4, as shown in Exhibits 1 and 2.

1. Specifications in Subsection 1 apply to all four chambers.

a. This group of chambers shall be constructed inside existing Government laboratory spaces. The chambers shall be free-standing within the space. The floor of the space is constructed of reinforced concrete approximately 5 inches thick. Any structure supporting the chamber may be anchored to this floor but attaching to any existing walls or the ceiling is not permitted.

i. The attached drawing (Exhibit 1) shows the existing room, and the volume the new chambers shall not exceed. The volume shown on Exhibit 1 measures: 23 feet long, 19 feet wide and 9.75 feet high. The final size of the cluster of four chambers (including any structural support) shall be contained within this volume. Any steps, electrical power filters, and HVAC components and ducting (if required) may exceed this volume.

ii. The ceiling height of the room in which this chamber will be constructed is 9.75 feet.

This is the distance from the floor to the bottom of the drop ceiling tiles. Contractors may install chambers that abut these ceiling tiles.

iii. The chamber design drawings shall be stamped by a licensed PE prior to submission to NIST.

iv. The chambers shall be designed pursuant to the appropriate design standards (e.g., seismic) given the chamber’s installation location in Boulder, CO.

v. NIST will be responsible for leveling the floor underneath the chamber. This will be done prior to the start of installation. Contractors are responsible for providing the floor flatness requirements.

b. Each chamber shall include one access door located on the side of the chamber indicated in Exhibits 1 and 2. Each door must be operable from either inside or outside the chamber.

i. Each door shall be a single leaf (i.e., no double leaf doors) and provide an unobstructed clearance of at least 36 inches wide and 72 inches tall. Each door shall be manually operated but be sealed via a pneumatic mechanism. Note that to achieve the required clear opening, any absorber attached to the door may be removed when the door is opened. NIST will provide compressed air near the chambers.

ii. If the door threshold is more than 4” off the ground, a step external to the chamber shall be included, and capable of supporting a person. This step may exceed the volume specified above. The step, if required, shall have a tread depth of at least 11” and a riser height of between 4” and 7”. The stair must be the same width as the door.

A handrail is only required if two or more risers are used. The Contractor is responsible for providing a handrail, if needed.

iii. One door maintenance kit shall be included for each door. This kit shall include any parts necessary to perform one routine maintenance service on each door.

c. Each chamber shall include an appropriate number of HVAC vents that allow the air to pass between the inside of the chamber and the room outside the chamber. External to these vents should be a blower (or similar device) that will circulate air through the interior of the chamber.

i. Each HVAC vent shall be properly shielded and, if necessary, covered with absorber designed to allow air to pass through it. This absorber is exempt from the requirements listed in Table I.

ii. The noise generated by the HVAC blower (or similar) shall not exceed 65 dBA (as measured at 1 meter from the blower).

d. AC Electrical power shall be available inside each chamber. Any electrical power entering the chamber shall be properly filtered. The Contractor is responsible for all electrical wiring inside the chamber (including lights and outlets), and any electrical wiring that runs along the outside of the chamber. NIST personnel will make the connection(s) to the building electrical system. The connection point to the building electrical system is indicated on the attached drawing (Exhibit 1).

i. Power line filters used should provide a minimum of 90 dB of insertion loss and function from at least 150 KHz to at least 18 GHz.

ii. There shall be one 120VAC duplex outlet on each wall of each chamber (16 outlets total). There is one 20-amp circuit available for each chamber.

iii. Lights shall be installed on the interior of each chamber. The lights shall be appropriately shielded/filtered to maintain the shielding integrity of the chamber, and to prevent the lights from emitting RF energy into the interior of the chamber.

iv. There shall be a sufficient number of lights placed in appropriate locations to allow equipment to be safely moved into the chamber and be configured before/after testing. As almost all the chamber volume will be utilized, equipment may be moved/configured in all areas of the chamber. Thus, lighting shall be sufficient in all areas of the floor.

v. The lights of each chamber will be placed on a circuit that is separate from the outlet circuits described above.

e. To enable the interior of each chamber to be monitored, a camera shall be installed inside each chamber to allow viewing of any automated test in-progress. This camera shall connect to a screen mounted on the outside of each chambers (these screens shall be provided by the Contractor). The approximate location of these screens is shown on the attached drawing (Exhibit 2).

i. Penetrations through the chamber wall shall be properly filtered/shielded to maintain the shielding integrity of the enclosure.

ii. The camera shall have the ability to zoom, pan and tilt inside the chamber via controls placed outside the chamber.

iii. The camera shall be shielded/EMC hardened and continue to function in radiated fields up to 200 V/m.

iv. The screen used to view the camera’s output will be a multi-purpose screen, also serving as the monitor for a desktop PC. The screen will be connected to the desktop PC via either HDMI, DVI, or VGA cables. NIST personnel will provide the desktop PC and connect it to the screen at a later date.

v. The screen shall be capable of being simultaneously connected to the camera and the desktop PC. However, the screen need only be capable of displaying one input at a time.

vi. The size of this multi-purpose screen shall be at least 50 inches, but not exceed 70 inches (as measured along the diagonal of the screen).

vii. The screen shall be capable of displaying video with a resolution of 1920x1080 pixels at a minimum refresh rate of 60 Hz.

f. The Contractor shall only use new materials in the construction of the chamber. The use of used/refurbished materials is not permissible.

g. Each of the anechoic chambers shall come equipped with one bulkhead panel that facilitates the passing of cables from the exterior to underneath the raised floor on the interior of the chamber. Each panel should be removable from the chamber wall to allow it to be machined. The approximate location of these panels is shown on the attached drawing (Exhibit 2).

i. The bulkhead panel shall be blank, in that no RF connectors are installed. RF connectors will be installed by NIST personnel at a later date.

ii. Each panel should measure approximately 12” in height and 18” in length. Deviations from the size given is allowed to enable the Contractor to utilize one of their “standard” panel sizes; one that is close in size (if not exact) to the dimensions given.

iii. In addition to the aforementioned blank bulkhead panels, one extra panel shall be provided. This panel will be used as a spare panel, installed only when other panels are removed for machining. The Contractor shall provide one extra panel of each type used. That is if there are two different sized panels used, one extra panel of each size shall be provided. These extra panels shall be blank (i.e. no installed RF connectors).

2. Specifications in this subsection only apply to the three anechoic chambers (Volumes

1, 2, and 4).

a. Each of the NIST/Boulder Building 3, three anechoic chambers shall be provided with a gas-based fire suppression system. The Contractor is responsible for design of each fire suppression system. The Contractor is responsible for obtaining approval of the design for the fire suppression system portion of the work which will require submittal to the authority having jurisdiction (AHJ) here at NIST (Office of Safety, Health, and Environment – Fire Protection Engineer). The Contractor is responsible for installation of each fire suppression system. The Contractor is responsible for obtaining approval by the AHJ for acceptance testing of each fire suppression system based on approved design documents. Acceptance testing shall include AHJ witnessing of the VESDA piping integrity test, suppression piping integrity test, as well as room tightness integrity test, along with performing the final acceptance testing in accordance with code. The Contractor is responsible for delivery of As-Built documentation of each fire suppression system (or the three fire suppression systems, assuming they are identical or are documented as one set of documents).

i. The fire alarm and suppression system submittal(s) to the AHJ shall be stamped by a licensed Colorado Professional Engineer of the Fire Protection discipline.

ii. The fire alarm and suppression system(s) shall be designed and installed in accordance with the 2015 International Building Code (IBC); 2015 International Fire Code (IFC); most current edition of NFPA 72, Fire Alarm and Signaling Code; most current edition of NFPA 2001, Standard on Clean Agent Fire Extinguishing Systems; and Factory Mutual (FM) Data Sheet 1-53, Anechoic Chambers.

iii. Each anechoic chamber fire suppression system shall use 1,1,1,2,2,4,5,5,5-nanafluoro-4-3-pentanone; also called “Novec 1230”; and Sapphire as the gaseous fire suppression agent. The agent minimum design concentration shall be 6.1% for each anechoic chamber fire suppression system design.

iv. The contractor shall design the system such that there is one supply of gaseous fire suppression agent good for the largest anechoic chamber volume that includes the use of a selector value on the agent supply manifold, directing the agent to the appropriate chamber based on smoke detection in the same chamber.

v. The NIST-Boulder sitewide fire alarm system is a fiber networked NOTIFIER® fire alarm system consisting of several buildings with NOTIFIER® fire alarm control panels (FACP). The Building 3 FACP is a NOIFIER® NFS2-3030 panel. The Building 3 FACP shall be used as the suppression system release panel for the fire suppression system protecting the anechoic chambers.

vi. The solenoid installed as the releasing device for the anechoic chamber fire suppression system must be a UL Listed 24 VDC solenoid for use with the NFS2-3030 building FACP in the NOTIFIER® Device Compatibility Document, dated October 15, 2018 or later.

vii. The Contractor performing programming and wire terminations of the fire alarm system shall be an employee of a NOTIFIER® certified vendor that is also a NOTIFIER® Premier vendor certified to work on networked systems. Contractors of vendors working on the fire alarm system, that do not meet these certifications cannot be allowed as fire alarm system guarantees and warrantees will be considered null and void.

viii. Each anechoic chamber fire suppression system shall utilize a separate VESDA air sampling detector for smoke detection. Each VESDA detector shall be placed outside of the anechoic chambers with the associated air sampling piping network for each anechoic chamber piped continuously from the detector to the inside of each associated anechoic chamber. Each VESDA detector shall be provided with a test port at the remote end of the piping network for testing each VESDA detector. The Contractor shall determine the appropriate number of air sampling inlets, their piping network routing, and appropriate piping holes for air intake based on the use of listed Aspire calculations for use with VESDA.

ix. Each VESDA smoke detector shall be addressable on the Building 3 fire alarm system for all associated VESDA detection thresholds and monitoring (Alert, Action, Fire 1, Fire 2, trouble, supervisory, etc.).

x. Each anechoic chamber shall be provided with shunt trip interlock of electrical power to the interior outlets (excluding the chamber lights) to each individual anechoic chamber associated with activation of the fire suppression system for the anechoic chamber. The shunt trip interlock shall be connected to and initiated by the NOTIFIER® fire alarm system by use of control modules. The Contractor is responsible for installation of the shunt trip interlock at the appropriate electrical panel breaker for each anechoic chamber. Shunt trip of power for lighting inside each anechoic chamber is not required.

xi. Each HVAC vent on each anechoic chamber shall be equipped with a damper that automatically closes in the event the fire alarm is triggered, per the details in Section 2, paragraph a, clause XV-3.

xii. Each anechoic chamber shall be equipped with chamber fire suppression notification consisting of a notification tree located outside the door of each chamber and consisting of the following notification appliances and signage in order from top to bottom of the notification tree:

1. Blue Strobe

a. “FLASHING BLUE STROBE MEANS CLEAN AGENT

FIRE SUPPRESSION SYSTEM HAS DISCHARGED

FOR THIS CHAMBER”

2. Amber Speaker/Strobe (Appliance labeled “ALERT”).

“AMBER STROBE MEANS CLEAN AGENT FIRE

SUPPRESSION SYSTEM SMOKE DETECTION IS IN

PROGRESS” “AUDIBLE TONES IDENTIFY:”

a. “SLOW WHOOP – LOW LEVEL ALERT STAGE”

b. “FAST PULSE – LEVEL FIRE 1 STAGE”

c. “CONTINUOUS TONE – DISCHARGE COUNTDOWN

IS IN PROGRESS FIRE STAGE 2”

d. “CLEAN AGENT FIRE SUPPRESSION SYSTEM FOR

THIS CHAMBER”

xiii. Each anechoic chamber shall be equipped with a manual release pull station and a fire suppression release abort button located directly outside the chamber near the door. The manual release pull station device and abort button device shall be separate devices (not one piece of equipment).

The manual release pull station shall be equipped with a clear protective cover to avoid accidental release via the manual release pull station.

xiv. VESDA detector and associated air sampling piping for each anechoic chamber shall perform to the following obscuration threshold settings as measured at the sampling hole using the Aspire calculations:

1. Alert – 0.07% per ft at pipe hole

2. Action – 0.18% per ft at pipe hole

3. Fire 1 – 1.5% per ft at pipe hole

4. Fire 2 – 2.5% per ft at pipe hole

xv. VESDA alarm threshold settings for each anechoic chamber shall perform the following sequence of operation matrix outputs:

1. Alert – Alarm notification to the NIST/Boulder command center for response by NIST Security. Activate amber speaker/strobe for the applicable anechoic chamber to identify involved chamber and lowest level of smoke detection for occupant response, to include an audible tone of SLOW WHOOP. Supervisory alarm condition on the NOTIFIER® fire alarm system indicating VESDA Alert.

2. Action – Alarm notification to the NIST/Boulder command center for response by NIST Security. Supervisory alarm condition on the NOTIFIER® fire alarm system indicating VESDA Action.

3. Fire 1 – Activation of Building 3 fire alarm system notification for building evacuation. Activation of damper closure of mechanical vents for the involved anechoic chamber. Activation of door hold open release. Activation of Amber Speaker/Strobe appliance on notification tree with a FAST Pulse. Activate power shunt trip for the associated anechoic chamber. Fire alarm notification on the NOTIFIER® fire alarm system indicating VESDA Fire 1 alarm for NIST/Boulder Police command center request for fire department response.

4. Fire 2 – Activation of timer countdown to suppression. Activation of suppression gaseous agent discharge post timer countdown.

Activation of Amber Speaker/Strobe appliance on notification tree with a Continuous Tone. After countdown has expired and agent is released, . Fire alarm notification on the NOTIFIER® fire alarm system indicating VESDA Fire 2 alarm for NIST/Boulder Police command center. At suppression gas discharge, the Blue Strobe appliance on the notification tree is activated.

xvi. Each anechoic chamber door shall be equipped with a magnetic door hold that shall release the door upon Fire 1 VESDA threshold being achieved.

xvii. Acceptance testing shall include verification that graphics have been updated on the NOTIFIER® sitewide ONYXWorks workstation for proper identification of alarms by the site proprietary command center for emergency response in the event of alarm.

b. The solid floor within the shielded enclosures shall be raised such that a cable conduit measuring 4 inches (inner diameter) can be housed underneath the floor. The raised floor should not exceed 12 inches in height and shall be level to 0.25 inches in any span inside the chamber (non-cumulative).

i. This floor shall be capable of safely supporting a 500-pound load distributed on four points over one square meter.

ii. In between the bottom shielding panel of the chamber and the raised floor, cable conduits shall be provided. These conduits should have an inner diameter of 4 inches and run from the bulkhead access panels on the exterior of the chamber to the access panels mounted in the raised floor. The access panels are noted on the attached drawing (Exhibit 2) as “infloor passthrough”.

1. The cable conduits shall extend from the bulkhead panel intended for access between the exterior and the area underneath the raised floor to panel a located in the interior of the chamber. In general, there should be one panel in the center of the floor.

iii. The Contractor is not responsible for installing any RF cabling. The Contractor shall provide fishing/pulling lines that will allow for the installation of RF cable(s) at a later date.

3. Specifications in this subsection only apply to Volume 4 – High-Frequency Anechoic

Chamber.

This chamber is intended to operate at frequencies up to 170 GHz. Given that anechoic chambers aren’t typically explicitly designed or certified at these frequencies, the specifications shown here represent the minimum requirements. Additional information can be found in the evaluation criteria document that accompanies these specifications.

a. This chamber shall have a lower operating frequency of 1 GHz.

b. The shielded enclosure shall be capable of providing at least 100 dB of shielding (electric field or plane wave) across the minimum range of 100 MHz to 40 GHz.

a. Contractors may propose different shielding values for different parts of the chamber.

For example, the Contractor may propose a design that features 100 dB of shielding at 100 GHz, except for the area around the door, which may only provide 90 dB.

b. All shielding values will be verified during the construction of the chamber at the frequencies described in Section VII.

c. The absorbing material(s) used inside this chamber shall meet, at a minimum, the following reflection characteristics:

Table I. High-Frequency Absorber Requirements Frequency (GHz) Maximum Typical

Reflectivity (Normal Incident Angle) (dB)

1 -20 3 -25 6 -40

18 -50 40 -50

Note that values shown are exceeded when the reflectivity is less than what is shown. For example, if at 1 GHz, the absorber has a reflectivity of -25 dB, it exceeds the performance requirement of -20 dB.

d. All absorbing material(s) used on the walls and ceiling of the chamber (not just in specular regions) shall meet the above minimum requirements. In areas where two or more walls join, there is an air vent, or a door, a different material may be used. This substitute material should have a maximum typical normal incident reflectivity of -10 dB at all frequencies above 1 GHz.

i. For the frequencies not specified in the table above (but still within the 1 GHz to 40

GHz range), the reflectivity of the absorbing material shall not be greater than -20 dB.

e. The total depth of the absorbing material used in the chamber (excluding moveable absorber on the floor) shall not exceed 8 inches. This is measured from the back of the absorbing material to the top.

f. The absorber on the walls and ceiling shall be attached in a fashion that makes it removeable. This enables NIST to change out absorber for future applications or replace absorber that is worn or damaged.

g. If pyramidal foam absorber is used as the primary absorbing material (exposed to the inside of the chamber) it should be protected with a coating that has minimal impact on the RF performance but protects the absorber from normal “wear and tear”. This coating should only be used on absorber affixed to the walls of the chamber (i.e., not for absorber on the floor or ceiling).

h. Any foam type absorber used within the chamber shall conform to the following standards: NRL 8093 (tests 1, 2, and 3), and either UL 94, ISO 11925-2, or ASTM E84.

i. The Contractor shall include enough pyramidal foam type absorber to cover 100 % of the open floor space.

4. Specifications in this subsection only apply to Volumes 1 and 2 – Anechoic Chambers.

These chambers are intended to operate at frequencies from 1 GHz up to 40 GHz. Examples of the use of these chambers include (but are not limited to): testing prototype experiments and quick verification measurements. We do not anticipate performing EMC testing pursuant to any standard.

a. The shielded enclosure shall be capable of providing at least 100 dB of shielding

(electric field or plane wave) across the minimum range of 100 MHz to 40 GHz. This will be verified during the construction of the chamber at the following frequencies, as described in Section VII.

b. The absorbing material(s) used inside this chamber shall meet, at a minimum, the following reflection characteristics:

Table II. Volumes 1 & 2 Absorber Requirements Frequency (GHz) Maximum Typical

Reflectivity (Normal Incident Angle) (dB)

1 -30 3 -40 6 -45

18 -45 40 -45

Note that values shown are exceeded when the reflectivity is less than what is shown. For example, if at 1 GHz, the absorber has a reflectivity of -25 dB, it exceeds the performance requirement of -20 dB.

c. All absorbing material(s) used on the walls and ceiling of the chamber (not just in specular regions) shall meet the above minimum requirements. In areas where two or more walls join together, there is an air vent, or a door, a different material may be used.

This substitute material should have a maximum typical normal incident reflectivity of - 10 dB at all frequencies above 1 GHz.

d. For the frequencies not specified in the table above (but still within the 1 GHz to 40

GHz range), the reflectivity of the absorbing material shall not be greater than -20 dB.

e. The total depth of the absorbing material used in the chamber (excluding moveable absorber on the floor) shall not exceed 12 inches. This is measured from the back of the absorbing material to the top.

f. If pyramidal foam absorber is used as the primary absorbing material (exposed to the inside of the chamber) it should be protected with a coating that has minimal impact on the RF performance but protects the absorber from normal “wear and tear”. This coating should only be used on absorber affixed to the walls of the chamber (i.e., not for absorber on the floor or ceiling).

g. Any foam type absorber used within the chamber shall conform to the following standards: NRL 8093 (tests 1, 2, and 3), and either UL 94, ISO 11925-2, or ASTM E84.

h. The Contractor shall include enough pyramidal foam type absorber to cover 100 % of the open floor space.

i. As shown in Exhibit 2, there shall be a removable aperture in the wall that enables a physical, line-of-sight connection between Volumes 1 and 2. This aperture shall measure approximately 12” in width and 12” in height. It is not necessary to install any RF connectors in this panel. The approximate location of this panel should be about midway between the chamber’s floor and ceiling and about midway between the two walls. The approximate location is shown in Exhibit 2.

j. As shown in Exhibit 2, there shall be a removable aperture in the wall that enables a physical, line-of-sight connection between Volumes 2 and 3. This aperture shall measure approximately 12” in width and 12” in height. It is not necessary to install any RF connectors in this panel. The approximate location of this panel should be about midway between the chamber’s floor and ceiling and about midway between the two walls.

k. Each chamber shall be designed such that an object can be mounted and suspended from the ceiling. As an example, NIST may mount a small robotic arm from this point in the ceiling to aid in testing (the robot in this example is not part of this procurement).

1.k.1. The object mounted to the ceiling will not weigh more than 100 pounds.

The approximate location of the mounting point in each chamber is shown in Exhibit 2.

1.k.2. The Contractor shall provide a pattern of bolts at this location on the ceiling. The exact patter and thread size will be provided after award, during the design phase. This bolt pattern will occupy a 12” x 12” square (approximately).

5. Specifications in this subsection only apply to Volume 3 – Reverberation Chamber.

This chamber is intended to operate at frequencies up to 40 GHz. We do not anticipate performing EMC testing pursuant to any standard. As such, there is no strict requirement for the lowest operating frequency of the chamber. The chamber shall be designed pursuant to the requirements and the lowest operating frequency will be determined during the acceptance testing.

a. The shielded enclosure shall be capable of providing at least 100 dB of shielding (electric field or plane wave) across the minimum range of 100 MHz to 40 GHz. This will be verified during the construction of the chamber at the following frequencies, as described in Section VII.

b. The reverberation chamber shall come equipped with two mechanical stirrers that shall meet, at a minimum, the following characteristics:

i. Each stirrer must be controlled independently and must allow both continuous and stepped rotation modes in either clockwise or counterclockwise direction.

ii. For continuous rotation, the stirrers must be capable of rotational speeds of 1 RPM

(or slower) and 16 RPM (or faster).

iii. For stepped rotation, increments of 0.25 degrees or smaller are required.

iv. The stirrers and its controller must allow manual control for operations such as jog and continuous motion in either direction. The controller must have a digital display indicating the position of each paddle.

v. The stirrers and its controller must allow for computer/remote control. The connection to the computer can be through one or more of the following methods:

IEEE 488, RS232 (DB-9), USB, and/or Ethernet.

vi. The stirrers shall be metal with an irregular/asymmetric shape.

1. The vertical stirrer shall inscribe a cylinder of with a radius of approximately 45 cm and should be positioned near a corner, away from the door.

2. The second stirrer shall be a “ceiling fan” type design that extends in the horizontal direction and is mounted on a shaft that hangs from the ceiling. Exhibit 3 shows an example of this stirrer. In the example, all of the blades of the stirrer are identical, but rotated to different angles to avoid symmetry. The stirrer should rotate through a cylinder that is approximately 12” in height and a radius that is large enough to only leave an approximately 12” clearance from the vertical stirrer described above. The stirrers shown in the Exhibits are only an example. Alternative designs are possible and will be considered.

Installation:

The Contractor shall install the chamber in Building 3, Room 3-1A112, at NIST Boulder, CO.

Installation shall include, at a minimum, uncrating/unpacking of all materials, construction of the chamber, demonstration of specifications, and removal of all trash. The chamber shall operate to manufacturer’s specifications upon installation. Installation will take place between 7:30 am and

5:30 pm mountain time, Monday through Friday (except Federal Holidays) and optionally between 8:00 am and 4:30 pm mountain time on Saturdays. Installation may begin as soon as October 1, 2019 but shall not begin more than 180 days after award.

All construction materials must be able to pass thorough an opening measuring 90 inches wide by 72 inches tall. The location of this opening is on the north wall of the room.

If the Contractor deems a forklift, and/or scissor lift necessary for the installation of the chamber, they are responsible for providing them. Because the installation area is inside, only electric, propane, or natural gas-powered lifts are acceptable. The Contractor is responsible for ensuring their personnel are properly trained/certified to safely operate any equipment used during the installation process. The Contractor is also required to provide the appropriate floor coverings to protect the floor from marring or damage.

Warranty:

The Contractor shall provide, at a minimum, a one-year warranty on the installation of the chamber, its shielding, and all features installed by the Contractor. Absorber used on the interior of the chamber shall be warrantied for a minimum period of 5 years. The warranty shall cover all parts, labor and travel (if required). The warranty shall commence upon successful completion of delivery, installation, training and demonstration of all required specifications.

Training:

Include at least 4 hours of training at NIST for up to 4 NIST personnel covering normal operation, troubleshooting, safety, and routine maintenance. Training will be provided during normal business hours, between 8:30am and 5:00pm mountain time, Monday through Friday, except Federal Holidays, and will be coordinated with the NIST Technical Point of Contact (TPOC) to ensure maximum availability of NIST personnel. Training is to occur within 10 days of the end of installation. The training may be completed on-site at NIST immediately after installation and demonstration of specifications.

IV. PERIOD OF PERFORMANCE

The period of performance shall be 250 days from award of this requirement.

V. PLACE OF PERFORMANCE

The design and manufacturing of the chamber shall be completed at the Contractor’s facility.

Installation of the chamber and training shall be accomplished at NIST, 325 Broadway, Boulder, Colorado. Normal duty hours are Monday through Friday, 8:30 a.m. to 5:00 p.m. except for Federal holidays. With Contracting Officer approval, contractors may be given access to the facility on Saturdays between 8:00 a.m. and 4:30 p.m. Contractors desiring access on Saturdays should indicate prior to the start of installation.

VI. PROJECT STATUS MEETINGS

The Contractor shall provide project updates at least once every 3 weeks from the time the contract is awarded until installation of the chamber begins. Once installation of the chamber begins, the Contractor shall provide a project update at least once every 2 weeks until the completion of the work. At the project update meetings, Contractors shall convey what work has been completed since the last meeting, potential issues/delays, and what work will be taking place before the next meeting.

These meetings may be held in person, or via a teleconference. The Contractor is responsible for scheduling the meetings, which at a minimum, shall be attended by the Contractor’s appointed project manager, and the COR or TPOC. The COR or TPOC is responsible for documenting that the meeting took place and providing a short description of what was discussed at the meeting.

VII. DELIVERABLES

Description Quantity Due Date Design drawings (excluding the smoke detection system) for NIST’s review and approval. These drawing shall be delivered electronically to the Technical Point of Contact (TPOC).

One (1) set

45 days after award of this requirement.

Design drawings and calculations for the smoke detection system shall be delivered electronically to the TPOC.

One (1) set

30 days after approving the chamber design drawings.

Start of installation of the chambers Once 180 days after award of this requirement

One (1) paper copy and (1) electronic copy of the operations and maintenance manual for the chamber shall be delivered to the

TPOC.

One (1) set

60 days after the start of installation

Completion of the chamber installation Once 60 days after the start of installation Training of NIST personnel at NIST, Boulder, CO

Once 10 days after the end of chamber installation.

Copies of the training information shall be electronically delivered to all training participants.

One (1) set

10 days after the end of chamber installation

One (1) paper copy and (1) electronic copy of the performance verification measurement report (with data) shall be delivered to the TPOC.

One (1) set

10 days after the end of chamber installation

VIII. PERFORMANCE REQUIREMENT SUMMARY

The Contractor shall demonstrate that all performance standards in this statement of work have been met by use of the methods shown below. The Contractor shall provide a measurement report (with data) showing that the installed chamber meets the performance standards. Further, the measurements in the report shall be conducted by an independent third-party company. The electromagnetic performance specifications shall be verified by use of:

1. IEEE 299: Enclosure shielding of each chamber shall be verified, prior to any absorber being installed, but after all penetrations (e.g., doors, bulkhead panels, vents, lights, etc.)

have been installed in the chamber walls. Shielding shall be verified at the following frequencies: 100 MHz, 1 GHz, 5 GHz, 10 GHz, 18 GHz, and 40 GHz.

In addition to the above list of frequencies, Volume 4 shall be measured at two additional frequencies above 40 GHz. These frequencies will be determined based on the design proposed by the Contractor. For example, if a Contractor submits a design for Volume 4 that can provide shielding at 70 GHz, then the two additional shielding test frequencies would be 50 GHz and 70 GHz.

The following test shall be performed in Volumes 1, 2, and 4, but their results will only be used to confirm the chamber is performing as designed. That is, given the small dimensions of the chamber, it may not be possible to meet the pass/fail criteria specified in each standard, but the measurement results should still indicate if the chamber is performing as designed.

2. CISPR 16-1-4: The site voltage standing wave ratio (SVSWR) shall be measured from 1 GHz to 18 GHz in accordance with CISPR 16-1-4. The dimensions of the test volume will be determined during the design phase.

3. IEC 61000-4-3: It shall be shown that a given test plane in the chamber meets the field uniformity requirements specified in IEC 61000-4-3 from 1 GHz – 18 GHz.

In addition to the shielding test specified above, the reverberation chamber (Volume 3) must also be measured pursuant to:

4. IEC 61000-4-21: It shall be shown that a given test volume in the chamber meets the field uniformity requirements specified in IEC 61000-4-21 from 1 GHz – 3 GHz. Additionally, the chamber shall be evaluated between 500 MHz and 1 GHz for field uniformity, but these data will be used for informative purposes only and will not be used in any acceptance criteria.

IX. GENERAL INFORMATION

Safety: The Contractor and its employees shall be responsible for knowing and complying with NIST installation safety prevention regulations. Such regulations include, but are not limited to, general safety, fire prevention, and waste disposal and are available upon request.

Patent Rights: The Government retains a Government use license to all inventions arising from this work.

Security: NIST is a restricted campus. An identification badge is required for access for entry into buildings and is shown to the Police when entering the campus.

Identification Badges: Contractor employees that come on-site to install the chamber must be

U.S. citizens and comply with NIST identification and access requirements. Contractors shall familiarize themselves with and comply with the Real ID Act of 2005 requirements. The Contractor employee is responsible for absences due to expired identification and access documents. Each Contractor employee shall wear a visible identification badge provided by the NIST Security Office. The badge must show the full name, title, and if required by NIST, the words “Contractor” in front. The Contractor employee shall turn in the NIST identification badge and vehicle pass to the TPOC, COR, or Contracting Officer (CO) upon termination of their services under this contract.

To facilitate the badging process all installation team members that will be on-site will be required to complete the badging/security process prior to working on-site. Therefore, the names and required information of the installation team must be sent to the TPOC at least 3 weeks prior to the start of installation.

Vehicle Registration: All Contractor employees must register their vehicles with the NIST Security Office to gain access to the campus. A valid driver’s license, Government-furnished civilian ID, proof of insurance and current registration must be presented to the NIST Security Office, at which time a NIST vehicle pass will be issued. The pass shall be displayed on the vehicle’s rear-view mirror in accordance with instructions. The Contractor employee shall follow NIST procedures for removal and turn-in of the vehicle pass upon termination of services under this contract.

Media Inquiries: The Contractor employee shall not respond to any media inquiries. Any inquiries from the media shall be immediately relayed to the TPOC, COR, and/or CO. There shall be no interviews, comments, or any other response without the knowledge and approval of the NIST Director.