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Tag: FCC testing

In the age of IoT (the Internet of Things), technology is easier and more convenient to use than ever。 Our cars, home security systems, lighting fixtures, and even refrigerators are connected to the internet, allowing us to interact with them via our smartphones and laptops。

Published in MultiPoint Blog

In today’s age, product designers are finding it more difficult to establish electromagnetic compatibility in a cost-effective manner—and this is largely due to the Internet of Things. Wireless connectivity, while convenient and useful for consumers, often requires a device to contain multiple RF interfaces, which poses a number of problems for designers.

Published in MultiPoint Blog

FCC – Update to 800 MHz Band

Posted on February 3rd 2020


On March 23, 2017, the FCC took steps to reform certain outdated rules applicable to the 800 MHz cellular service band to facilitate the use of cellular spectrum for mobile broadband services such as long term evolution (LTE)。 Specific reforms adopted in this revision include:

  • Power Reform: FCC will facilitate broadband technologies by changing its technical rules to permit cellular licensees to transmit the same amount of power across the spectrum band, whether they are deploying a legacy (narrow bandwidth) technology or modern (wider bandwidth) technology like LTE.
  • Co-existence with Public Safety: FCC will continue to ensure co-existence of cellular and neighboring public safety systems by retaining cellular-specific interference resolution rules and procedures, and by engaging stakeholders via a public forum。
  • Consistent Treatment with Similar Spectrum Bands: FCC will treat cellular spectrum consistently with other similar commercial wireless spectrum bands by conforming rules related to power measurement, out of band emissions, field strength, and discontinuance of operations.
  • Unnecessary rules/burdens: FCC will eliminate unnecessary rules and burdens related to application filings, domestic and international coordination, and comparative renewal.
Published in MultiPoint Blog

We were recently asked how can one determine if a test laboratory is accredited to ISO/IEC 17025 or if it is 2。948-listed。  Our reply follows:

You can determine the current status of your test laboratory as it relates to this issue by going to this , Equipment Authorization System Test Firm Search, which permits you to find a test laboratory which is authorized by the FCC to perform compliance testing。 You may either follow the prompts on the screen, or you may download files of 2。948-listed and accredited test firms。

Please note that a test facility currently 2.948-listed may be in the process of obtaining ISO/IEC 17025 accreditation, or scheduling an assessment, neither of which are reflected on this site, so we recommend you contact the facility directly to confirm their status.

The accreditation and recognition of a test site applies to a specific test facility. All testing, including testing by external resources and subcontracted testing, must be performed at an accredited test facility that is recognized by the FCC.

If your device is tested at more than one site, the test report should specify what tests were performed at which locations.

After October 12, 2017, if testing is performed at a non-accredited site, the test results and test report will not be accepted, even if an FCC accredited testing laboratory reviewed and deemed the results acceptable.

Published in MultiPoint Blog

FCC - Import Limitations on RF Devices

Posted on February 3rd 2020

We were recently asked by a client if there is a limit on the number of radio devices that we may import for FCC compliance testing, industry trade shows, and evaluation/suitability for marketing.  Our reply, per 47CFR§2.1204 is as follows:

The FCC does limit the number, type, and conditions under which RF devices may be imported. stipulates that RF devices can be imported in quantities of 4000 or fewer units for testing and evaluation to determinate compliance with the FCC rules and regulations, product development, or suitability for marketing。 stipulates that 200 or fewer RF devices designed solely for operation within one of the FCC’s authorized radio services for which an operating license is required to be issued by the FCC, or 10 or fewer units of all other products, can be imported for demonstration at industry trade shows。 Both rules state that the devices will not be offered for sale or marketed。

If you require more than the FCC rules allow, you may request an import quantity waiver, per and .

An import quantity waiver request must be submitted well in advance of the import date and it must address 10 specific points that are detailed in . This document also provides important instructions for submitting the import waiver request via the FCC OET Knowledge Database (KDB) Inquiry System so that the waiver request is reviewed and processed most efficiently.

Published in MultiPoint Blog

On November 14, 2016, the FCC adopted rules for specific millimeter wave (mmW) bands above 24 GHz. The action was undertaken to establish a regulatory framework for the use of these bands for the development of the next generational evolution of wireless technology. The new rules go into effect on December 14, 2016, with the aim of promoting the development of highly beneficial technologies, in particular 5G technology. All new rule parts go into effect on December 14, 2016, with the exception of Sec. 25.136 and 30.8 which contain information collection requirements that are not effective until approved by the Office of Management and Budget. 。

Published in MultiPoint Blog
Recently, our lab was asked about the FCC frequency stability requirements for 902 - 928 MHz wireless transmitters.  We advised our client that transmitters that operate within the 902 - 928 MHz band are subject to FCC . The wireless transmitter carrier’s 20 dB bandwidth must be within the 902 - 928 MHz frequency band where operation is permitted under all conditions including modulation, frequency sweeping, hopping and stability, the frequency tolerance of the carrier, and over variation in temperature.

The frequency accuracy of your wireless transmitter carrier’s signal must be within ±0.001% of the operating frequency over a temperature variation of −20 degrees to +50 degrees C at normal supply voltage, as well as for variation in the primary supply voltage from 85% to 115% of the rated supply voltage at a temperature of 20 degrees C. If your wireless transmitter is battery operated, it must be tested using a new battery.


Please feel free to contact Rhein Tech with any questions you may have at 703 689 0368 or sales@ rheintech。com

Published in FCC
Our test lab had a customer inquiry this week and the question was as follows:
Does the FCC allow us to certify equipment that was initially verified? And what exactly are the differences between a verification, a certification, and a declaration of conformity (DoC)?
Our reply to this question is: No, you cannot.

The FCC does not allow certification for a device that is subject to verification. The difference between a verification, certification and DoC are as follows:

  • Verification - is a procedure where the manufacturer makes measurements or takes the necessary steps to insure that the equipment complies with the appropriate technical standards.  Verification attaches to all items subsequently marketed by the manufacturer or importer which are identical as defined in 47CF§2.908 to the sample tested and found acceptable by the manufacturer.  Products subject to verification are typically intended for industrial and/or commercial use.
  • Certification - is an equipment authorization issued by, or on behalf of, the FCC based on representations and test data submitted by an applicant.
  • Declaration of Conformity -  is a procedure where the responsible party as defined in 47CFR§2.909 makes measurements or takes other necessary steps to insure that the equipment complies with the appropriate technical standards.  The DoC attaches to all items subsequently marketed by the responsible party which are identical, as defined in 47CFR§2.908, to the sample tested and found acceptable by the responsible party.  Products subject to DoC are typically intended for consumer use. 

Please feel free to contact Rhein Tech with any questions you may have at 703 689 0368 or sales@ hfytxx.com

Published in FCC
Our test lab had a customer inquiry this week and the question was as follows:
We have a module that does not include a RF shield, however we meet the standalone requirement for a module with a RF shield。 Can we qualify for FCC certification as a standalone module?
Our reply to this question is: No, you cannot.

To qualify as a standalone module, the RF (radio frequency) circuitry must be shielded, even if the module meets the limits in a standalone configuration without it. The RF section of the module must be shielded to help prevent RF coupling when the module is installed in a host, so it’s not enough for it to meet only the limits of the standalone configuration.

The shielding design must fully enfold all the RF circuitry, including the top, all sides, and the bottom, which may be a shielding ground plane. The shielding must be made of sheet metal, metal mesh, or a metallic ink-coated material expressly designed as an effective shield. Any holes in the shield must be significantly smaller than the wavelength of the radiation that is being blocked, to effectively approximate an unbroken conducting surface.

The other module circuitry, i.e. flash memory, temperature sensor, input voltage regulators, input data buffering circuits, etc. may not be RF circuitry, and therefore do not need to be shielded. However, the onus is on the grantee to employ sound engineering judgment to reduce/eliminate any possible RF coupling that might affect a host interface.

斗地主达人Please feel free to contact Rhein Tech with any questions you may have at 703 689 0368 or sales@ hfytxx.com

Published in MultiPoint Blog
Our test lab had a customer inquiry this week and the question was as follows:
Under what conditions does the FCC allow standard antenna connectors under Part 15.203?
We replied as follows:

Under , the FCC allows the use of standard antenna connectors only when the device requires professional installation。

斗地主达人In all other cases, intentional radiators must be designed with a permanently attached antenna(s) or a unique antenna connector that ensures that only the antenna(s) certified and furnished by the grantee can be used。 An example would be a wireless local area network, typically user-installed, and therefore requires a unique connector。

If professional installation is optional, the FCC does not allow the use of a standard antenna connector. When professional installation is required, the certification grant includes this condition.

An applicant must clearly demonstrate the requirement for professional installation by providing to the satisfaction of the FCC the following information about the device:

  1. intended use
  2. installation requirements
  3. marketing methods

The FCC has permitted standard connectors on intentional radiators in the following situations:

  • Point-to-point applications require a tower-mounted, directional antenna.  The device is advertised in special trade publications and/or demonstrated at targeted trade shows.  The applicant satisfied the 3 information requirements listed above to demonstrate the need for professional installation.  
  • Data and control signal transmitters located in oil fields; 
  • Transmitters mounted on trains and in train stations; 
  • Pole–mounted transmitters used by utility companies; 
  • Transmitters mounted on traffic signals for use by police and/or emergency vehicles.


Please feel free to contact Rhein Tech with any questions you may have at 703 689 0368 or sales@ hfytxx.com

Published in MultiPoint Blog
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