21-32377 PURCHASE DESCRIPTION.pdf

Beneficial comments, recommendations, additions, deletions, clarifications, etc., or any data that may improve this document should be sent to: AFLCMC/WNA ATS Division, 235 Byron Street, Suite 19A, Robins AFB GA 31098-

1813.

AMSC N/A FSC 6625

INCH-POUND

PD21WRGUEAB015

CAGE 98752

23 April 2021

PURCHASE DESCRIPTION

Wattmeter

1. SCOPE

1.1 SCOPE. The wattmeter, for radio frequency (RF) is an instrument used to measure the energy delivered, absorbed, dissipated or reflected by a device under test, such as an electronic module or device, antenna, antennae array, or electrical load(s). This instrument shall provide accurate readings of RF energy to develop and prototype equipment, repair and maintain general electronics, navigational aids, satellite, and other RF communications gear.

1.2 Classification. The test set covered by this purchase description (PD) shall be commercially available equipment that has factory-installed options and/or may be modified to the extent necessary to meet the following description. The wattmeter shall be compliant with MIL-PRF-

28800.

2. APPLICABLE DOCUMENTS.

2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed.

2.2 Government documents

2.2.1 Specifications, standards and handbooks. The following specifications, standards, and handbooks of the exact revision listed below form a part of this specification to the extent specified herein.

DEPARTMENT OF DEFENSE SPECIFICATIONS

MIL-PRF-28800 Performance Specification Test Equipment for use with Electrical and

Electronic Equipment

MIL-PRF-39012 Connectors, Coaxial, Radio Frequency, General Specification For

DEPARTMENT OF DEFENSE STANDARDS

MIL-STD-461 Requirements for the Control of Electromagnetic Interference

MIL-STD-810 Environmental Test Methods

MIL-STD-1472 Human Engineering

MIL-STD-1686 Electrostatic Discharge Control Program for Protection of Electrical and

Electronic Parts, Assemblies and Equipment (excluding electrically initiated explosive devices)

MIL-STD-130 Identification and Marking of US Military Property

(Copies of these documents are available online at https://quicksearch.dla.mil/.)

2.2.2 Other Government documents, drawings and publications.

CODE OF FEDERAL REGULATIONS (CFR)

47 CFR § 15.109 Radio Frequency Devices, Radiated emissions limits

47 CFR § 15.209 Radio Frequency Devices Radiated emission limits; general requirements

2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract.

INTERNATIONAL ELECTRO TECHNICAL COMMISSION (IEC)

IEC-61000-4-3 General requirements Electromagnetic compatibility (EMC) –

Part 4-3: Testing and measurement techniques – Radiated, radio-frequency electromagnetic field immunity test - Edition 4.0

IEC-60939-1 Passive filter units for electromagnetic interference suppression

IEC-61326-1 Electrical Equipment for measurement, control and laboratory use

– EMC Requirements - Part 1: General requirements

(Copies of these documents are available online at http://www.iec.ch/.)

https://quicksearch.dla.mil/ http://www.iec.ch/

ISO/IEC 17025 General requirements for the competence of testing and calibration laboratories - Third Edition

ISO/IEC-61010-1 Safety requirements for electrical equipment for measurement, control, and laboratory use – Part 1: General requirements

(Copies of these documents are available online http://www.iso.org/.)

SOCIETY OF AUTOMOTIVE ENGINEERS (SAE)

SAE-AMS-STD-595/31136 Red, Flat or Lusterless

(Copies of these documents are available online http://www.sae.org/.)

UNDERWRITERS LABORATORIES (UL)

UL 1283

UL 1449

Standard for Safety Electromagnetic Interference (EMI) Filters

Underwriters Laboratories Surge Protection

(Copies of these documents are available online http://www.ul.com/.)

2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein (except for related specification sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.

3. SALIENT CHARACTERISTICS.

3.1 Item description. This is a wattmeter for radio frequency energy power measurement.

3.2 Radio frequency range. The wattmeter shall measure radio frequency energy with a minimum frequency span from 500 kilohertz (kHz) to 2.5 gigahertz (GHz), as a function of the

“Plug In” modules (see section 3.12 for more information).

3.3 Radio frequency power. The wattmeter, radio frequency shall have a minimum effective power measurement range from 250 milliwatts (mW) to 10 kilowatts (kW), as a function of the

“Plug In” modules, (see section 3.12 for more information).

3.4 Accuracy continuous wave (CW). The wattmeter accuracy shall be ≥ ±5.0 % of CW signal reading.

3.5 Accuracy peak envelope power (PEP). The wattmeter accuracy shall be ≥ ±9.5 % with an amplitude modulated signal ≤ 90% of reading.

3.6 Accuracy standing wave ratio (SWR). The wattmeter SWR accuracy shall be ≥ ±10.0 % of reading.

http://www.iso.org/ http://www.sae.org/ http://www.ul.com/

3.7 Insertion loss (SWR). The wattmeter shall have an insertion loss as a SWR ≤ 1.05 up to

1 GHz with “N” type female panel connectors.

3.8 Radio frequency resolution. The wattmeter measurement resolution shall be per table 1 with a ± one-digit resolution on all scales.

3.9 Impedance. The wattmeter line impedance match shall be for 50 ohms (Ω) measurements throughout the operating frequency spectrum.

3.10 Return loss. The wattmeter shall have return loss ≤ ±0.5 decibel (dB) to a corresponding

SWR ratio at 50 Ω load.

3.11 Sample rate. The wattmeter shall have a minimum sample rate frequency of two hertz

(2 Hz).

TABLE 1. Operating Parameters.

Description Parameter Accuracy Resolution

Frequency Bandwidth*

(FB) Minimum 500 kHz ≤ FB Min ≤ 2.5 GHz ≥ ±10.0 %

Power Level* Minima

250 mW ≤ PO Min ≤ 10kW

≥ ±5.0 %

± 1 digit

Continuous Wave

(CW) Full Scale

Reading

≥ ±5.0 %

Peak Power Envelope

Full Scale Reading

≥ ±9.5 %

Standing Wave Ratio

(SWR)

≥ ±10.0 %

Modulation Amplitude ≥ ±5.0 % **

Sampling Rate (FS) FS ≥ 2 Hz __ __

⃰ Plug in dependent ** ≥ 5% from 0 to 90% and

≥10% from 90 to 100%.

3.12 Wattmeter plug in’s. The wattmeter shall have two (2) 7/8” plug in module ports to simultaneously measure radio frequency energy of various frequencies, forward, reverse power, and sample the radio frequency energy concurrently based on power levels and user needs.

3.13 Displayed power. The wattmeter shall display the measured RF energy, PEP or CW power in watts, milliwatts, kilowatts or dBm (dB above 1 milliwatt at 50 Ω) as selected by the user.

3.14 Displayed SWR. The wattmeter shall display the SWR directly in the range of 1.00 to

99.99% as selected by the user.

3.15 Design and construction. The wattmeter shall be used in both bench top and rack mount environments. The wattmeter is a commercial off the shelf item subject to commercial products regulatory standards. The wattmeter shall be designed and constructed in accordance with all applicable European Union (EU) requirements with the “CE” marking affixed, International

Organization for Standardization (ISO), the International Electro-technical Commission (IEC), the International Telecommunication Union (ITU), Underwriters Laboratories (UL) and the

American National Standards Institute (ANSI). The wattmeter shall be compliant with the

Restriction of Use of Hazardous Substances (RoHS) and Waste from Electrical and Electronic

Equipment (WEEE) guidelines and policies. It shall be designed and constructed so that no parts will work loose in service, and to withstand the strains, jars, vibrations, and other conditions incident to shipping, storage, installation, and service under the guidance of MIL-STD-810.

3.16 System Safety. The wattmeter shall comply with all sections of the ISO/IEC-61010 standard for electrical safety. The system shall comply with MIL-STD-1472 for weight and size restrictions for single person lift and handling.

317 Electrostatic discharge (ESD). The design of the wattmeter shall preclude equipment damage due to ESD, protect personnel from electrical shock due to static charging, and prevent ignition of explosive atmospheres due to sparking in accordance with MIL-STD-1686.

3.18 Electro magnetic interference (EMI). The wattmeter EMI emissions shall be in accordance with the following radiated emission and susceptibility requirements of MIL-PRF-28800, MIL-STD-461: RE102 and RS103 and the emitted radiation absorption and radiation limits title

47 CFR 15.109 and 15.209.

3.19 Electro magnetic compatibility (EMC). The wattmeter EMC shall be consistent with the compatibility and susceptibility requirements stated in IEC-61000-4-3 and IEC-61326-1.

3.20 Service life. The design of the wattmeter shall be such that under normal use and operation the service repair can be performed according to MIL-PRF-28800 sections 3.14.2 and 3.14.3.

3.21 Connectors. The system shall have female “N” type connectors for input and output compliant with MIL-PRF-39012 for all the electrical, mechanical, and thermal characteristics.

3.22 Operating temperature range. The wattmeter shall meet the specifications listed herein with full capabilities within the temperature range of 50 to 104°F (10 to 40°C) after tests in MIL-PRF-

28800 section 4.5.5.1.1 have been performed for class 4 equipment classification (see Table 11 on page 41).

3.23 Storage temperature range. The wattmeter shall meet and/or exceed manufacturer’s specifications after storage in a temperature range from 0 to 113°F (-17 to 45°C) and operating temperature has been reached per section 3.22 of this document.

3.24 Altitude requirements. The wattmeter shall meet its operating performance and accuracy while operating at an altitude of 8,000 ft. (2,438 meters). The equipment shall meet its performance and accuracy requirements, for operation and non-operating storage, as specified in

MIL-PRF-28800 sections 3.83 and 4.5.5.2 respectively at this altitude.

3.25 Heat dissipation and ventilation. Ventilation shall be sufficient to allow for prevention, buildup and retention of moisture, heat dissipation either passive or active shall be suitable in order to meet MIL-PRF-28800 section 4.5.5.1.1 for class 4 equipment classification (see Table

11 on page 41).

3.26 Calibration and maintenance adjustments. No special tools, software, technical manuals or documentation shall be required for the alignment, adjustment, repair and calibration of the wattmeter except those provided with the wattmeter. A software license shall be issued for each physical instrument when the system is designed for computer based calibration. Software licenses needed to perform the alignment/adjustment process (where required by the manufacturer) shall be valid for the life of the instrument and shall be included with each wattmeter. Any special or unique accessories not common to a secondary calibration laboratory required for calibration of this item shall be furnished by the manufacturer to include but not limited to software, fixtures, tools, standards.

3.27 Calibration period. The design of the wattmeter shall provide readily accessible calibration and maintenance adjustments. The calibration adjustments shall be accessible without removal of the test set case or modules. The calibration interval shall be based on a period of one calendar year or an operating time of 2,080 hours, whichever occurs first. At the end of this interval 85% of the units shall remain within calibration tolerances in accordance with MIL-PRF-28800 section 3.12, with traceability and verification to an ISO/IEC-17025 certified facility.

3.28 Reliability. The design of the wattmeter shall be such that under normal use and operation the mean time before failure (MTBF) exceeds 2,080 hours of operation with a statistical certainty equal or greater than of the wattmeter shall 95% in accordance with MIL-PRF-28800 section

3.13. The manufacturer shall provide a summary of maintenance or warranty records to establish the validity of the statistical assertion in accordance with MIL-PRF-28800 section 3.13. The manufacturer shall be able to reasonably establish the claim that the offered equipment is capable of the required level of reliability by meeting and/or exceeding MIL-PRF-28800 sections 3.13 and 4.5.8.1.

3.29 Built in test equipment and diagnostics. The wattmeter shall be equipped with built in test and diagnostic capability that at “Power On or “Cold Start” performs a system test evaluating all functional characteristic of the instrument in accordance with MIL-PRF-28800 section 6.5.2.6.

3.30 Maintainability. The wattmeter shall meet the human engineering factors of ergonomics for operational and maintainability criteria, providing access to controls, internal components and adjustments in accordance with MIL-STD-1472 sections 5.9 through 5.9.18 and MIL-PRF-

28800 section 6.6.2.4.

3.31 Preventive maintenance. Preventive maintenance shall not require more than 10 minutes per 30-day period. Preventive maintenance shall not require breaking of the equipment seams where calibration seals would normally be placed in accordance with MIL-PRF-28800 section

3.14.2.

3.32 Corrective maintenance. The wattmeter shall be designed to meet reparability criterion in accordance with MIL-PRF-28800 section 3.14.1.

3.33 Electrical power sources and connections. The wattmeter equipment shall operate from nominal commercial, military, and shipboard power sources with a nominal voltage of 120 VRMS

Single Phase AC (±10%) at line frequencies of 50 Hz, 60 Hz, in accordance with MIL-PRF-

28800 sections 3.1.5.2 and 3.1.5.2a.

3.34 Noise suppression. The wattmeter shall be able to operate with electrical noises and harmonic content ≤10% harmonic distortion present on the alternating current power source with broadband noise frequencies in the 30 Hz to 50 kHz range and levels varying from line level of

41.6 dB ±1 dB (108 VAC to 132 VAC) measured at the power input in accordance with

UL 1283 and IEC/EN 60939-1.

3.35 Weight. The total weight of the wattmeter excluding accessories and manuals, shall comply with MIL-STD-1472 section 5.9.11.3.3 for weight and size restrictions for single person lift and handling and shall not exceed a one-person lift of ≤ 25 pounds, (11.4 kilograms).

3.36 Markings. All warning decals and instrument category rating must conform to commercial safety standards and be visible by the user in accordance commercial product safety labeling regulations and with MIL-STD-130. Markings shall be applied with paint, decals, engraving or molding and shall be the largest size possible. Warning/Danger text shall be Lusterless Red, color number 31136, of SAE-AMS-STD-595.

4. VERIFICATION. Verification of the delivered wattmeter test set will be performed at the delivery point by the end user.

5. PACKAGING. For acquisition purposes, the packaging requirements shall be as specified in the contract or order. When actual packaging of materiel is to be performed by DoD personnel, these personnel need to contact the responsible packaging activity to ascertain requisite packaging requirements. Packaging requirements are maintained by the inventory control point's packaging activity within the military department or defense agency, or within the military department's system command. Packaging data retrieval is available from the managing military department's or defense agency's automated packaging files, CD-ROM products, or by contacting the responsible packaging activity.