PD_Rev6_15E-153A-RF_-_GPS_Rubidium_Receiver_Final_16_Dec_14.docx

15E-153A-RF

18 DEC 2014

Revision #6

PURCHASE DESCRIPTION

FOR

GPS Rubidium Receiver

1. SCOPE: AFMETCAL is seeking to purchase a GPS Rubidium Receiver for its Precision Measurement Equipment Laboratories (PMELs) and Air Force Primary Standards Laboratory (AFPSL). The GPS Rubidium Receiver shall be used in the calibration of items with internal oscillators. The GPS Rubidium Receiver shall also be capable of calibrating the long term stability of other oscillators (ex: rubidium oscillators). The GPS Rubidium Receiver must be complete and fully operational. It shall include all cables & adapters necessary and meet all the specifications listed in this purchase description.

2. PERFORMANCE REQUIREMENTS:

2.1. Time Base: GPS Rubidium Receiver shall consist of a Rubidium time base steered by the global positioning system (GPS).

2.2. Frequency: The GPS Rubidium Receiver shall provide a minimum of five 10 MHz outputs. It shall have a minimum of one 1 MHz output. It shall have a minimum of one 5 MHz output. It shall have a minimum of 1 pulse per second (pps) output.

2.3. Uncertainty: The 10 MHz Frequency Output Accuracy after 24 hour warm-up shall be ≤2xE-12 when locked to GPS signal averaged over 24 hours.

2.4. Antennae: GPS Rubidium Receiver shall come equipped with an Antennae and 75 feet of coaxial cable to connect it to the unit.

2.5. Long Term Stability Measurements: The GPS Rubidium Receiver shall be capable of measuring the long term stability of other oscillators for measurements lasting up to 30 days in length. The final result of this measurement shall be reported in the Allen Variance. The GPS Receiver shall be designed and constructed to be capable of measuring long term stability of other oscillators to an aging rate of ≤±1xE-11.

3. FUNCTIONAL REQUIREMENTS:

3.1. Automate Control: The GPS Rubidium Receiver shall have capability to automatically lock onto the GPS network with minimal to no user input. The long term stability measurement shall be automated requiring only input from the user at the beginning and end of the data collection.

3.2. User Interface: The GPS Rubidium Receiver shall be front panel controllable. A controller shall be permitted for the long term stability measurements, the controller provided shall be able to interface with the provided equipment (ie: serial port, LAN port).

3.3. Special Hardware/Software/Licenses Requirements: Any special equipment, fixtures, tools, standards, etc., required for the calibration and verification and are not common to the PMEL must be supplied with the GPS Rubidium Receiver. Any unique accessories including software required for long term stability measurements of oscillators shall be furnished by the contractor. For long term stability measurements the final reported value shall be an Allen variation. If further software is needed to perform this calculation (ie: Stable 32, licensed copy) it shall be included with the system. Units that fail calibration/verification and are recommended to be aligned or adjusted, either manually or using an automated alignment/adjustment software, the special hardware, manual instructions, software, software instructions and software license (where required by the manufacturer and shall be valid for the life of the instrument) needed to perform the alignment/adjustment process shall be included with the GPS Rubidium Receiver. A list of peripheral support equipment required to accomplish the calibration/alignment/adjustment of the unit must be provided with the GPS Rubidium Receiver.

3.4. Display: Front Panel of unit shall clearly indicate if a GPS lock exists.

4. PHYSICAL/MECHANICAL REQUIREMENTS:

4.1. Physical Dimensions: The GPS Rubidium Receiver itself shall be designed for mounting in a standard 19 inch EIA electronic equipment rack. The depth of the item from the back of the front panel shall not exceed 22 inches.

4.2. Power: 120 VAC ±10%, 60 Hz ± 3%

4.3. Power Cord(s): Each component of the GPS Rubidium Receiver requiring connection to power shall be supplied with a power cord that is at least 6 feet long.

4.4. Commercial Parts: Commercial parts and materials shall have properties consistent with a precision laboratory instrument.

4.5. Design and Construction: The equipment shall be designed and constructed of materials that meet the requirements of this specification and in accordance with the best commercial practices for industry approved equipment. It shall be the contractor's responsibility to assure the government that such design objectives as reliability, accuracy of operation, maintainability and ease of operation have been given due consideration in the manufacture of this equipment. All parts such as shafts, bearings, regulators, switches, controls, etc. shall have proper clearance and adjustments. They shall so work together that the equipment will supply the rated requirements without unnecessary strains, vibrations and overheating. They shall be able to withstand the conditions met in shipping, storage, installation and services. All material and parts of this equipment shall be capable of withstanding environmental testing requirements of this specification.

4.6. Metals: Metals shall be of corrosion resistant type or suitably treated to resist corrosion due to atmosphere conditions likely to be met in storage, service or transportation. Dissimilar metals in intimate contact shall be kept to a minimum.

4.7. Continuous Operation: After the required warm-up period as per 2.3, the equipment shall meet the specifications of this purchase description and shall not display any intermittent characteristics or overheating for an extended period of time not less than 120 hours (5 days) of continuous operation.

4.8. Workmanship: The workmanship shall be first class, of neat general appearance in compliance with standard commercial practices. The standards of workmanship shall be such that the instrument complies with the requirements set forth in this purchase description.

4.9. Operating Environment/Storage: The GPS Rubidium Receiver shall perform to all specifications within the following environment:

4.9.1. Operating Temperature Range: 22.8°C ± 3.3°C

4.9.2. Operating Humidity Range: 20% to 50% relative humidity

4.9.3. Storage Temperature Range: -20C to +60C

4.9.4. Storage Humidity Range: 15 to 80% RH

4.10. Safety: Equipment shall be designed such that it will not be any hazard to itself or to any person operating it using reasonable precautionary procedures.

4.11. Data Storage: The unit shall be capable of saving long term stability measurement data to an internal hard drive.

5. CONTROLLER REQUIREMENTS: Where the contractors solution to the Air Force requirements of this Purchase Description requires the use of a Controller, whether internal or external, the Controller shall be provided by the Contractor and meet the following additional minimum requirements.

5.1. Stability Measurements: For long term stability measurements the final reported value shall be reported in Allen variation. If further software is needed to perform this calculation (i.e.: Stable 32, licensed copy) it shall be included with the system. All software/programs shall be written in such a manner that progress indicators are displayed.

5.2. Operating System and Software: The controller shall run the Microsoft Windows 7 operating system.

5.3. Hardware:

5.3.1. Controller: Shall meet or exceed Windows 7 and contractor provided software requirements.

5.3.2. Processor: Shall meet or exceed Windows 7 and contractor provided software requirements.

5.3.3. Memory: Shall meet or exceed 4 GB system Memory and contractor provided software requirements.

5.3.4. Graphics Device: Shall meet or exceed Windows 7 and contractor provided software requirements.

5.3.5. Input Output (I/O) External Ports, Slots and Connectors:

5.3.5.1. USB/Ethernet/Serial: The controller shall be equipped with the appropriate hardware to communicate with contractor provided equipment.

5.3.5.2. Display Panel: Minimum 15” Color Flat-Panel type of display shall be included.

5.3.5.3. Hard Drive: Minimum 100 GB

5.3.5.4. DVD-ROM/CD-RW Drive: DVD minimum read speed of 8x. CD minimum read speed of 24x.

5.4. Software: Where software is required by the contractor to fulfill the requirements (ie: long term stability measurements) to perform automatic data acquisition, any additional data and programs not specifically identified hereafter, yet required to perform the stated tasks shall be provided by the contractor.

5.4.1. Test Results: Test results shall be displayed in real-time via a Flat-Panel type monitoring device. Long Term Stability measurements shall be reported in the Allen Variation.

5.4.2. Printed Results: As a minimum all test results shall be selectively printable to the Flat-Panel monitoring device and a laser quality letter and graphical hard copy paper printer (printer hardware not required). The capability to compile and print a specific parameter is desirable:

6. UNCERTAINTY ANALYSIS: The total Absolute Uncertainty for all functions shall be the worst case Root-Square-Sum of Reference Standard absolute uncertainty, standard-deviation, stability, temperature/power coefficients (where applicable), all other system Type A and all other system Type B uncertainties are displayed in terms of Coverage Factor of two (k=2). All sources of uncertainty/error shall be included in the analysis. Any contractor caveat conditions or requirements to meet/perform an Absolute Uncertainty Analysis shall be clearly identified and documented by the contractor.

7. Interchangeability: The first system shall be the same as the last system in terms of firmware, software, functionality, and configuration control. All replaceable assemblies, subassemblies, components, and parts of designated model provided under a single contractor or ordered from any one manufacturer shall be fully interchangeable without interference or degradation of performance.

8. FIRMWARE: When firmware or software upgrade is anticipated by the manufacturer during the life of this contract, the contractor shall contact AFMETCAL for concurrence. If AFMETCAL concurs with the proposed upgrade all GPS Rubidium Receiver’s shall be updated to this upgrade. All firmware or software provided under this contract shall be at the same version, revision and revision date at the completion of the contract.

9. LICENSING: Where licensing issues apply to any part of the GPS Rubidium Receiver Systems, such licensing and associated documents shall be obtained and provided by the contractor. Licenses shall not contravene federal law, federal procurement regulations, or the requirements of this acquisition.

10. Model and Serial Number Identification (IUID): This item shall be clearly labeled with a model, serial number, and manufacturer’s name. Unique item identification labeling shall follow the Item Identification and Valuation clause as stated in the solicitation and contract.

11. TESTING: This item shall be inspected and tested at destination, as specified elsewhere in this contract. This item shall be checked with test equipment with parameters equal to or better than those required to assure that specified performance requirements are met. Test equipment used shall have first echelon certification directly traceable to a National Metrology Institute or other AFMETCAL approved equivalent laboratory when required. Tests shall be performed to assure the item meets the requirements of this purchase description. Such testing at destination does not relieve the contractor of performing all inspections and quality checks at the point of fabrication, as specified elsewhere in this contract, or as necessary, to ensure performance, as specified herein. In addition to all elements of this purchase description, all commercially published components provided with this system must, as a minimum, satisfy their commercially published performance specifications (and must be provided by the contractor).

Attachment:

Data Requirements