|
Changes Coming to CISPR 22
Updating a report that first appeared in the April edition of the Compliance Advisory Service, EN 555022:1998 and its amendments and AS/NZS CISPR 22:2004 (which is identical to CISPR 22:2003, edition 4) contain test methods that have been/will be rejected in Edition 5 of CISPR 22.
The primary issues are:
1) The use of ferrite clamps on all cables that exit the test site, including
AC power. The ferrite clamps were supposed to provide improved repeatability
but this has not been the case, and the requirement for these clamps has
been removed in Edition 5 of CISPR.
2) The specification for ISNs for testing telecom ports is inadequate and
causes large variations in test results.
Read the full article
Avoiding Regulatory Pitfalls
with Wireless ModulesThis following article was co-authored by Mark Briggs, Principal Engineer
for Elliott Laboratories. It was published in the July 2005 issue of Conformity
magazine.
From WiFi in your HiFi to Bluetooth in medical devices, the use of wireless
communications has become ever more prevalent in products that have typically
relied upon wired interfaces. While the availability of RF modules may have
alleviated the need for manufacturers to become proficient in RF design,
the complexity of approvals for wireless devices requires a much greater
depth of regulatory knowledge. This article reviews the EMC and radio test
requirements in the US, Canada and the European Union for devices that incorporate
wireless modules, with the aim of providing guidelines to assist in understanding
the test and regulatory requirements for both the wireless function and the
complete product.
Read the full article
FCC Releases Internet Access Data
The Federal Communications Commission (FCC) released new data on high-speed connections to the Internet in the United States on 7 July 2005. Twice a year, facilities-based broadband providers must report the number of high-speed connections in service pursuant to the FCC's local competition and broadband data gathering program (FCC Form 477).
High-Speed Connections to the Internet Increased 34% During 2004 for a Total of 38 Million Lines in Service.
At the end of 2004, the service providers that report to the Commission had at least one high-speed service subscriber in 95% of the nation's zip codes. Our analysis indicates that 99% of the country's population lives in these zip codes.
Read the full article
| 
