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Items filtered by date: October 2019

On October 25, 2019, the FCC published 47 CFR Parts 1 and 27 [WT Docket No. 18–120; FCC 19–62], Transforming the 2.5 GHz Band, in the Federal Register Daily Journal of the United States Government

This document, which serves as a final rule, revises the regulatory framework surrounding the 2。5 GHz band in order to make more mid-band spectrum available for next generation wireless services, including 5G。 Amendments 27。14 (u) and (v) and 27。1204 are effective beginning November 25, 2019。 The rest of the document will go into effect on April 27, 2020。   

The requirements delineated in sections 27。14 (u) and (v) and 27。1204 now include amended collections subject to the Paperwork Reduction Act of 1995 (PRA), Public Law 104-13。 These revisions will be submitted for review, and the FCC encourages comment on the modified information。

斗地主达人For more information, you can view the official document . 

 

 

Published in MultiPoint Blog

The PCB designer is no stranger to EMC issues, especially the issue of crosstalk. 

Crosstalk is any undesirable signal transfer between communication channels or traces within a PCB. Put simply, crosstalk occurs when one trace's signal overpowers another trace's signal. The aggressor, whose signal is louder or stronger, can keep the victim trace from communicating information properly, causing the board to work incorrectly. In addition, the victim trace will often try to "raise its voice" or strengthen its signal in response, thus acting like the aggressor trace. 

Because re-designing PCBs due to noncompliance is frustrating, it is in the designer's best interest to incorporate crosstalk mitigation techniques into the design cycle before submitting the product to a testing laboratory。 

Published in MultiPoint Blog

If there's one thing that PCB and EMC design have in common, it's that these designs are often left until the very end of the product design cycle。 As with EMC design, waiting until the last moment to consider PCB design can be costly, time-consuming, and stressful, especially when dealing with high-speed PCB design。 

Published in MultiPoint Blog

The Telecommunications Certification Body Council (TCBC) is hosting its Fall 2019 Workshop November 12 - November 14, 2019 at the Marriott Inner Harbor in Baltimore, Maryland。 Registration closes on November 5, and the TCBC urges interested parties to hurry and book their rooms! 

This three-day-workshop event will discuss the following topics:

  • FCC, ISED, and NIST updates
  • Standards updates 
  • Roundtable discussions 
  • Presentations on various topics, including 5G  
Published in MultiPoint Blog

First released in October of 1959 to replace MIL - E - 7894, MIL-STD-704 delineates the standards for compatibility between aircraft power systems and utilization equipment. Initially, MIL-STD-704 only accounted for 28 Vdc and 115/200 Vac at 400 Hz originating from a three-phase, four-wire source. Over time, various revisions were made to the standard by establishing new requirements; adding voltage ranges; correcting erroneous information; creating new test methods; and releasing change notices.

斗地主达人The latest revision, Revision F (issued in 2004), is the current MIL-STD-704 standard。 Below is a review of this standard according to its latest revision。

Published in MultiPoint Blog

In a recent letter to FCC Chairman Ajit Pai, chairwoman of the Committee on Science, Space, and Technology Eddie Bernice Johnson expressed concern over the FCC’s proposal for an emissions limit of -20 dBW for the 24 GHz band, citing studies from NASA and NOAA that conclude that at an out-of-band emissions limit of -20 dBW, activity in the 24 GHz band would interfere with weather data. The studies claim that, instead, the emissions limit for 24 GHz should be -52.4 dBW.

Published in MultiPoint Blog

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