1、 FSC 6625 A-A-59755A 5 May 2010 SUPERSEDING A-A-59755 5 November 2004 COMMERCIAL ITEM DESCRIPTION WATTMETER, RADIO FREQUENCY The General Services Administration has authorized the use of this Commercial Item Description (CID) for all federal agencies. 1. SCOPE. This Commercial Item Description (CID)
2、, describes a Radio Frequency (RF) Wattmeter. This CID is meant as a minimum requirement for the RF Wattmeter in which only those manufacturers that meet or surpass the following requirements are to supply this wattmeter per this CID. The RF wattmeter described herein is a portable, insertion-type,
3、RF wattmeter used to measure continuous wave (CW) forward and reflected power in 50 ohm transmission lines using removable power elements. The RF Wattmeter described herein has a detachable load resistor accessory for terminated RF power measurements. 2. CLASSIFICATION. Equipment covered by this CID
4、 shall be commercially available equipment and may be modified to the extent necessary to meet this description. The equipment shall be Class 3 in accordance with MIL-PRF-28800, except as specified herein. 3. SALIENT CHARACTERISTICS. The equipment shall be capable of operation within the accuracies,
5、 limits, and specifications herein. 3.1 Safety and Environmental. The equipment shall meet all safety and environmental requirements as specified in MIL-PRF-28800 for the classification as stated herein. 3.1.1 Temperature Operating. The equipment shall conform to its specified performance and accura
6、cy while being operated in a temperature range of +10C to +45C. INCH-POUND Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any other data that may improve this document should be sent to 742 CBSG/LEEC, 460 Richard Ray Blvd, Suite 200, Robins AFB, GA 31098-1813. S
7、ince contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.daps.dla.mil/online/ . Provided by IHS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59755A 2 3.1.2 Temperat
8、ure Non-operating. The equipment shall conform to its specified performance and accuracy after being stored in an environment in the temperature range of -10C to +45C. 3.2 Electrical Power Sources. The equipment shall operate from nominal single-phase commercial, military, and shipboard power source
9、s of 120 volts AC (10%) or 240 volts AC (10%) at line frequencies of 47.5 Hz to 52.5 Hz and 57 Hz to 63 Hz. Transient state conditions shall meet MIL-PRF-28800 requirements for the classification specified herein. The equipment shall also have internal rechargeable battery power. The battery/batteri
10、es shall provide power for the unit for a minimum of 8 hours with average use before recharging is necessary. The batteries shall be capable of being recharged to full potential in less than 16 hours. 3.3 Reliability. The design of the equipment shall be such that under normal use and operation the
11、equipment does not fail within 1500 hours of operation with a statistical certainty of 95%. 3.4 Calibration and Maintenance Adjustments. The design of the system shall provide for readily accessible calibration adjustments and maintenance adjustments. The calibration adjustments, wherever possible,
12、shall be accessible without removal of the equipment case or modules. The calibration interval shall be a period of one year or greater based on an operating time of 2000 hours. No special tools shall be required for alignment or adjustment except those furnished with the equipment. 3.5 Performance
13、Requirements. The equipment shall meet all requirements specified herein, after the warm-up period specified in MIL-PRF-28800, under all combinations of input power conditions, output signal conditions and operating service condition as specified in MIL-PRF-28800. 3.5.1 Frequency. The wattmeter freq
14、uency range shall include 450 kHz to 2.3 GHz. 3.5.2 Power. The power range of the wattmeter shall be a minimum of 100 milliwatts to 2.0 kilowatts as a directional wattmeter and 0 to 100 watts with a detachable load resistor. 3.5.2.1 Power Accuracy. The accuracy of the wattmeter shall be within 7% of
15、 full scale for continuous wave (CW) power measurements and within 8% of full scale for peak envelope power (PEP) power measurement. 3.5.3 Power Elements. The directional wattmeter shall be compatible with standard forward and reflected power Plug-in Elements which correspond to the frequency and po
16、wer levels to be measured. However, the wattmeter shall not be supplied with the power elements. 3.5.4 Modulation Frequency. The minimum modulation frequency range for the wattmeter shall be 30 Hz to 10 kHz. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IH
17、S-,-,-A-A-59755A 3 3.5.4.1 Percent Modulation. The wattmeter shall measure percent modulation, for power levels greater than one third of full scale, with an accuracy of 5 % for 0 to 90 % modulation and 10 % accuracy for 90 to 100 % modulation. 3.5.5 Standing Wave Ratio (SWR). The wattmeter shall me
18、asure SWR for the range 1.00 to 85.00 to an accuracy of 10 % (worst case) of the reading. 3.5.6 Return Loss. The wattmeter shall measure the return loss of signals for the range 0 to 30.0 dB with an accuracy of 0.3 dB to corresponding SWR. 3.5.7 Interface. 3.5.7.1 Wattmeter Control. The controls tha
19、t operate the wattmeter shall be on the front or face panel. 3.5.7.2 Connectors. The wattmeter shall have type N female connectors. 3.5.7.2.1 Impedance. The wattmeter shall have an impedance of 50 ohms. 3.5.7.3 Insertion VSWR. The maximum insertion VSWR of the wattmeter shall be less than or equal t
20、o 1.05:1 for frequencies less than 1.0 GHz. 3.5.7.4 Display. The wattmeter shall have a minimum of three (3) character display with floating decimal point. The wattmeter shall be able to display the following operation modes and indicators: Forward power; Reflected power; SWR or VSWR; Return Loss; P
21、ercent Modulation; Watts and dBm (dB); Over-range Indicator; and Low Battery. 3.5.7.5 External Interface. The equipment shall be compatible with optional IEEE-488 or EIA/TIA-232-F capability. 3.5.7.6 Pulse Parameters. The equipment shall make measurements with the following minimum square pulse modu
22、lation characteristics. 3.5.7.6.1 Pulse Width. The minimum pulse width shall be 1.0 microsecond for 100 MHz to 2300MHz, 2.0 microseconds for 26 MHz to 99 MHz, and 20 microseconds for 2 MHz to 25 MHz. 3.5.7.6.2 Pulse Repetition Rate. The minimum pulse repetition rate shall be 30 pulses per second. 3.
23、5.7.6.3 Pulse Duty Cycle. The minimum duty cycle shall be 0.01%. 3.5.8 Accessories. The equipment shall include the following accessories or equivalent capabilities. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59755A 4 3.5.8.1 Transit Case. T
24、he equipment shall include a transit case capable of storing the RF wattmeter, accessories, power cord, and manuals. 3.5.8.2 Load Resistor. The equipment shall include a load resistor accessory. The load resistor shall be air cooled, 100 watts continuous duty, and 50 ohms impedance. The VSWR shall b
25、e no more than 1.10:1 from DC to 1.0 GHz and no more than 1.25:1 from 1.0 GHz to 2.3 GHz. 3.5.9 Physical Characteristics. The size and weight of the equipment shall be consistent with current commercial practices. The equipment shall be portable with the following physical characteristics. 3.5.9.1 D
26、imensions. The height, width, and depth of the equipment shall be compatible with hand-held or portable operation. The equipment shall be within 5 inches high, 8 inches wide, and 10 inches deep. 3.5.9.2 Weight. The weight of the equipment shall be compatible with hand-held or portable operation. The
27、 total weight of the equipment, excluding accessories and manuals, shall not exceed 11 pounds (5 kilograms). 3.5.10 Manuals. The equipment shall be delivered with operator, maintenance, illustrated parts, and calibration manuals. Format and quantity shall be as specified in the contract or order. Le
28、vel of maintenance philosophy, as defined in MIL-PRF-28800, shall be as specified in the contract or order. 4. REGULATORY REQUIREMENTS 4.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent p
29、ossible provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. The offeror/contractor is encouraged to use recovered materials to the maximum extent practicable, in accordance with paragraph 23.403 of the Fed
30、eral Acquisition Regulation (FAR). However, used, rebuilt, or remanufactured components, pieces, and parts shall not be incorporated. 4.2 Green Procurement Program. Green Procurement Program. Green Procurement Program (GPP) is a mandatory federal acquisition program that focuses on the purchase and
31、use of environmentally preferable products and services. GPP requirements apply to all acquisitions using appropriated funds, including services and new requirements. FAR 23.404(b) applies and states the GPP requires 100% of EPA designated product purchase that are included in the Comprehensive Proc
32、urement Guidelines list that contains recovered materials, unless the item cannot be acquired: a) competitively within a reasonable timeframe; b) meet appropriate performance standards, or c) at a reasonable price. The prime contractor is responsible for ensuring that all subcontractors comply with
33、this requirement. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59755A 5 5. PRODUCT CONFORMANCE PROVISIONS. 5.1 Product Conformance. The products provided shall meet the salient characteristics of this CID, conform to the producers own drawings
34、, specifications, standards and quality assurance practices, and be the same product offered for sale in the commericial market. The government reserves the right to require proof of such conformance. 5.2 Metric Products. Products manufactured to metric dimensions will be considered on an equal basi
35、s with those manufactured using inch-pound units, provided they fall within the specified tolerances using conversion tables contained in the latest revision of Federal Standard No. 376, and all other requirements of this CID are met. If a product manufactured to metric dimensions exceeds the tolera
36、nces specified in the inch/pound units, a request should be made to the contracting officer to determine if the product is acceptable. 5.3 The contracting officer has the option of accepting or rejecting the product. 6. PACKAGING. Preservation, packing, and marking shall be as specified in the contr
37、act or order. 7. NOTES. 7.1 Sources of documents. 7.1.1 Military Specifications, Standards, and Handbooks referenced herein may be obtained online at https:/assist.daps.dla.mil/online or from the Standardization Document Order Desk, Building 4, Section D, 700 Robbins Avenue, Philadelphia, PA 19111-5
38、094. 7.1.2 The Code of Federal Regulations (CFR) may be obtained at http:/www.gpoaccess.gov/cfr/index.html or available from the Superintendent of Documents, U.S. Government Printing Office, Washington, DC, 20402. 7.1.3 FAR and DFARS may be obtained from the Superintendent of Documents, P.O. Box 371
39、954, Pittsburgh, PA 15250-7954. Electronic copies of the FAR may be obtained from https:/www.acquisition.gov/far/ . Electronic copies of the DFARS may be obtained from http:/www.acq.osd.mil/dpap/dars/dfars/index.htm . 7.1.4 Electronics Industry Alliance (EIA). Hardcopy of EIA standards and technical
40、 publications are available from Global Engineering Documents, the exclusive distributor of EIA standards or at http:/ . Phone number: 1-800-854-7179. 7.1.5 Institute of Electrical and Electronics Engineers (IEEE) standards products may be obtained at http:/www.ieee.org or available from IEEE Operat
41、ions Center. Phone: (800)678-IEEE. Mail: IEEE Operations Center, Sales Office, 445 Hoes Lane, PO Box 1331, Piscataway, NJ, 08855-1331, USA. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59755A 6 7.2 Key Words. Detachable load resistor Insertion
42、-type Portable MILITARY INTEREST Custodians: Preparing Activity: Air Force 84 Air Force 84 Army AT Navy SA Reviewers: Agent: Air Force 99 Air Force 99 DLA - IS (Project 6625-2010-005) NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at https:/assist.daps.dla.mil/online . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
