SOURCE: ETSI

TITLE: Radio Microphone Task Force Progress Report

AGENDA ITEM: GRSC5 5.6

CONTACT: Brian Copsey (BC@copsey-comms.com)

GSC Radio Microphone Task Force Chairman gsc12_grsc5_32

Radio Microphone Task ForceProgress report

Resolution GSC-10/8

Considering:that various countries and regions have established differing standards and test methods for these devices.

Resolves:1. to facilitate a strong and effective global radio standards collaboration

on Radio Microphones and cordless Audio standardization in a technology neutral environment;

2. that given the World wide appeal and use of band 2 micro transmitters, : That GRSC Working Party 1 should examine existing standards and limits and prepare a draft documents for GRSC#11;

3. that given the ITU limits are different in the three regions,: The GRSC Working Party1 should examine the cost benefits of using the most stringent limits for the GRSC standards;

4. that GRSC Working Party 1 should examine the “EMC” method of testing and report back to GRSC#11;

5. that GRSC Working Party 1 should seek members views and comments on band sharing with other services now that the broadcast bands have become congested with simulcasting of analogue and digital transmissions

Resolves 1: Radio Microphones

• The ETSI Radio Microphone Standard, EN 300-422 has been updated with digital systems and is out for public enquiry until 10 August 2007.

• With the devastation caused by the “Digital Dividend” reviews in Europe compatibility studies are being undertaken in L band.

• Considerable work has been carried out by the industry prior to submission for sharing this new spectrum,

• this information plus all other draft documents mentioned in this presentation can be found at:

http://portal.etsi.org/docbox/Workshop/GSC/GRSC_WP1_radio_mics/• Within Europe there is an increasing awareness that Radio

Microphones play an important part in a range of Industries, an example of this is that within the UK, OFCOM has been forced by public opinion to issue a second consultation on their proposals !

Resolves 1: Aids for the Handicapped

• With the closure of the European harmonised band for ERMES, other uses were considered for this spectrum, Aids for the handicapped now have channel allocations in the bands:

h1 169.4000 - 169.4750 MHz 10 mW e.r.p.

h2 169.4875 - 169.5875 MHz 10 mW e.r.p.

Resolves 2: Band II Micro Transmitters

• Following publication of ETSI Standard EN 301 357 many European Administrations have legalised their use.

• After experience with the standard a number of amendments to clarify the measurement techniques have been made.

• The major one being the use of Chambers for all measurements, in order to eliminate contributions from Broadcast transmitters.

• Another area requiring clarification was the measurement of external power leads when used with a battery operated device,

• The draft copy of EN 301-357 details these changes.

Resolves 3: Regional differences

"...that given the ITU limits are different in the three regions,: The GRSC Working Party1 should examine the cost benefits of using the most stringent limits

for the GRSC standards..."

• ??????

Resolves 4: “EMC” method of testing

"...that GRSC Working Party 1 should examine the “EMC” method of testing and report back to

GRSC#11..."

• Following feed back from the use of EN 301 357 from both industry and Test Lab’s this method has proved to be useful in measuring low power devices.

Resolves 5: Band sharing

"...that GRSC Working Party 1 should seek members views and comments on band sharing with other services now that the

broadcast bands have become congested with simulcasting of analogue and digital transmissions..."

• As previously mentioned Radio microphones are seeking to “bandshare” in L band.

• Within Europe The European Commission has placed mandates to investigate Flexible bands and work is underway in both ETSI and the Administrations to investigate the possibilities.

• Within the UK a considerable amount of work is underway to investigate the possibilities raised by the Cave Review, initially in the 2.7 – 3.4 GHz band with experimental Licences expected latter this year.

Radio Microphone Task Force

• Thanks you for your interest in this subject

• For further information please contact:

• Brian Copsey

• BC@copsey-comms.com

• +44 7860 300552