Rec7401e

CEPT/ERC/REC 74-01

Page 1

European Radiocommunications Committee (ERC)

within the European Conference of Postal and Telecommunications Administrations (CEPT)

CEPT/ERC/RECOMMENDATION 74-01E (Sió

fok 98, Nice 99, Sesimbra 02, Hradec Kralove 05, Cardiff 11)

UNWANTED EMISSIONS IN THE SPURIOUS DOMAIN

Recommendation adopted by the Working Group

INTRODUCTION

This

Recommendation

specifies

the

limits

of

the

unwanted

emissions

in

the

spurious

domain

(spurious

domain

emission limits) for different services and types of equipment. It should be used as a generic guide when drafting new,

and revising ETSI standards, and also for guidance to administrations in the absence of relevant standards. It should

not

be

used

as

a

stand-alone

document

for

the

purpose

of

type

approval.

The

limits

are

set

for

generic

families

of

Services and do not prevent that specific systems, for specific reasons, might require tighter limits reported in ETSI

standards.

This

Recommendation

is

to

be

used

within

a

broader

context

of

Recommendations

ITU-R,

dealing

with

unwanted

emissions that are summarised by the ECC/REC/02-05

contain information and guidance on the applicability and measurement of limits reported in this Recommendation.

It is recognised that certain existing ETSI standards and a limited number of those in an advanced stage of preparation

might not fully align with this Recommendation. Where, for historical reasons, such existing standards do not align

with this Recommendation, the spurious domain emission limits should be reviewed if revisions are considered. It is

also

recognised

that,

largely

as

a

consequence

of

new

technologies

emerging,

it

may

be

acceptable

that

specific

standards adopt limits which differ from this Recommendation.

Where a difference between the limits for a particular standard and this Recommendation might exist, the limits should

1

be

agreed

following

the

iterative,

consultative

procedure

given

in

the

ETSI/ECC

Memorandum

of

Understanding

.

This

procedure

should

consider

the

interaction

between

technical

parameters,

spectrum

efficiency,

regulatory

and

economic aspects.

Where there is a difference between the limits for a particular standard and this Recommendation CEPT assumes the

following procedure would be useful:

?

?

The

relevant

technical

bodies

in

ETSI

and

CEPT

will

agree

to

exchange

liaison

statements

to

each

other

whenever they believe changes to this Recommendation or an ETSI standard, are required;

The

ETSI

liaison

statement

should

be

supported

by

appropriate

technical

justification

and

other

relevant

information. This should include information on economic and market related issues concerning the proposal.

In

addition

ETSI

should

also

provide

any

information

on

system

spectrum

efficiency

that

they

may

have

available to support their case;

2

3

The

CEPT

liaison

statement

should

include

the

implications

of

the

proposal

on

spectrum

engineering

parameters

such

as: effective

use

of

the

spectrum,

requirements

of

existing

services,

sharing/adjacent

band

and other regulatory issues;

?

The proposal should be considered in the spirit of the ETSI/ECC MoU with dialogue, full consultation and an

iterative process if necessary. Ideally this process should be completed within 6 months.

The conclusions should be mutually acceptable and neither party should feel that its views have been

disregarded;

?

1

This is available from the ECO (many CEPT documents are available on the ECO web site /eco).

2

Currently ETSI TC ERM.

3

Currently CEPT WG SE.

Edition of January, 2011

CEPT/ERC/REC 74-01

Page 2

?

When consensus is achieved the results should be recorded in a revision of this Recommendation or revision

of the appropriate standard.

It is considered appropriate that this Recommendation should be reviewed every three years, in the light of changing

technologies

and

regulatory

requirements.

This

review

should

involve

consultation

with

the

relevant

technical

and

Working Groups within CEPT and ETSI.

“

The European Conference of Postal and Telecommunications Administrations,

considering

a)

that the radio frequency spectrum is a common resource and it is necessary to keep it as un-polluted as possible,

making the best use of the most modern and cost-effective techniques;

b)

that it is important for CEPT countries to define common limits of unwanted emissions in the spurious domain for

all services that may be placed in operation

c)

that

detailed

and

specific

sharing

or

compatibility

studies

may

lead

to

different

limits

and

definitions

for

the

unwanted emissions in the spurious domain from the systems concerned; however these are not in the scope of

this Recommendation which aims to provide a specific minimum requirement;

d)

that Recommendation ITU-R SM.329 provides options for different categories of limits for unwanted emissions in

the spurious domain; moreover it provides some degree of freedom to administrations, for definition of frequency

boundaries

of

spurious

domain

and

the

detailed

transition

of

the

limits

nearby

the

fundamental

emission;

in

particular it allows, for digital modulations, different definition of spurious emissions frequency boundaries;

e)

that Recommendation ITU-R SM.1539 and Appendix 3 of the ITU Radio Regulations deal with variation of the

boundary

between

the

out- of-band

and

spurious

domains,

other

than

the

specific

?

250%

of

the

Necessary

Bandwidth from the centre frequency of the emission;

f)

that Appendix 3 of the ITU Radio Regulations contains general spurious emissions limits, with the time scales for

their implementation;

g)

that the Radioastronomy Service, the Earth Exploration Satellite Service and the Meteorological Satellite Service

using

passive

sensors

are

particularly

sensitive

to

interference

due

to

their

wide

frequency

coverage

and

the

weakness of the signals they detect. Their protection limits are far lower than the spurious domain emission limits

considered practicable at the antenna port of most transmitters, therefore the protection of these services depends

on

additional

mitigating

factors

such

as

antenna

decoupling

and

spatial

separation.

Threshold

levels

of

interference

detrimental

to

the

radio

astronomy

service,

Earth

exploration-satellite

and

meteorological-satellite

services using passive sensors can be found in Recommendations ITU-R RA.769 and RS.1029;

h)

that there may be cases where a permanent source of interference, for example a radar or broadcast transmitter in

the

near

vicinity,

or

spurious

emissions

generated

at

the

radio

transmitter

site

due

to

the

interaction

amongst

various transmitters operating at the same time, cause unacceptable performance degradation to a victim receiver.

These cases are considered site engineering problems and are not in the scope of this Recommendation provided

that it is possible to use special protection applied to either the source of interference, or the victim, or both;

i)

that CEPT and ETSI have developed a Memorandum of Understanding describing the relative responsibilities of

the two bodies. The MoU text is available from the ECO;

j)

that

within

CEPT/ECC,

a

statistical

simulation

methodology

based

on

the

?Monte

Carlo?

method

has

been

developed and accepted as the basis for the development of a software simulation tool SEAMCAT, which enables

assessment

of

the

effect

of

spurious

domain

emission

limits

in

terms

of

probability

of

interference.

The

latest

version of SEAMCAT tool is available from the ECO web site;

k)

that

unwanted

emissions

may

be

delivered

to

the

antenna

port

with

consequent

radiation

from

the

antenna

or

produced by direct unwanted radiation from the system enclosure, due to insufficient shielding; however the latter

effect is outside the scope of this Recommendation;

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CEPT/ERC/REC 74-01

Page 3

l)

that fast switching transients of burst transmission systems may produce specific spurious emission patterns with

high peak factor, which may affect victim receivers more severely than that due only to the spurious emissions

associated with the average power during the burst duration;

m)

that

transmission

systems

may

be

coupled

to

an

“Active

Antenna

System”

which

may

further

contribute

to

generation of spurious emissions;

Note:

an

“Active

Antenna

System”

(AAS)

is

an

antenna

with

embedded

capability

for

electronic

amplification and/or other

RF processing. The total gain of an

AAS

may be

functionally split into an

“active” gain of the electronic functions (AG) and a conventional “passive” gain/loss (directivity) due to

the geometrical design performance of the antenna (PG).

n)

that

receivers

may

also

radiate

spurious

components

from

the

antenna,

which

are

presently

not

covered

by

Recommendation ITU-R SM.329;

recommends

1)

that limits of unwanted emissions in the spurious domain apply at frequencies beyond the limit of 250% of the

necessary bandwidth above and below the centre frequency of the emission. However, this frequency separation

may be dependent on the type of modulation used, the maximum bit rate in the case of digital modulation, the type

of

transmitter,

and

frequency

co-ordination

factors.

For

example,

where

practical

the

?

250%

of

the

relevant

Channel Separation (CS) may be used.

Note 1: According to the Radio Regulations, the necessary bandwidth is, for a given class of emission, the

width of the frequency band, which is just sufficient to ensure the transmission of information at the

rate and with the quality required under specified conditions. However, the necessary bandwidths of

most

digital

modulation

formats

are

presently

not

referred

to

in

Recommendations

ITU-R

of

SM

series.

Note 2: Considering

the

flexibility

allowed

by

Recommendation

ITU-R

SM.329

on

the

250%

boundary

definition, it is recognised that this figure may be appropriate for medium bandwidth systems, while

the physical constraint of filtering in the narrow-band systems and the resulting amount of spectrum

polluted

by

wide-band

systems

may

require

further

adaptation

(e.g.

by

a

wider

or

a

reduced

percentage,

respectively).

Recommendation

ITU-R

SM.1539

and

Appendix

3

of

the

ITU

Radio

Regulations give guidance on the boundary variation in these cases.

Note 3:

According

to

the

Radio

Regulations,

for

satellite

services

multichannel

or

multicarrier

transmitters/transponders,

where

several

carriers

may

be

transmitted

simultaneously

from

a

final

output amplifier or an active antenna, the centre frequency of the emission is taken to be the centre of

the

–

3 dB bandwidth of the transmitter or transponder, and the transmitter or transponder bandwidth

is used in place of the necessary bandwidth for determining the boundary

between the out-of- band

and

spurious

domains.

Similar

provision

also

applies

for

multicarrier

base

stations

and

mobile

stations in the Mobile Service; further guidance is given in Annex 2.

Note 4: In Article 1 of the ITU Radio Regulations (No. 1.146B) and in Recommendation ITU-R SM.329 the

spurious domain (of an emission) is defined by the frequency range, beyond the out-of- band domain,

in which spurious emissions generally dominate.

2)

that for the purpose of this Recommendation, only unwanted emissions in the spurious domain conducted to the

antenna port or subsequently radiated by any integral antenna, are subject to the established limits;

3)

that the spurious domain emission limits for radio equipment are considered here to be applicable for the range 9

kHz to 300 GHz. However, for practical measurement purposes only, the frequency range of spurious emissions

measurements

may

be

restricted

still

ensuring

that

the

limits

are

met.

As

guidance

for

practical

purposes,

the

following measurement parameters are normally recommended:

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CEPT/ERC/REC 74-01

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Table 1

Fundamental frequency range

Frequency range for measurements

Lower frequency

Upper frequency

(The test should include the entire harmonic band and

not

be

truncated

at

the

precise

upper

frequency

limit

stated)

1 GHz

9 kHz

9 kHz

30 MHz

30 MHz

30 MHz

30 MHz

10

th

harmonic

3 GHz

5

th

harmonic

26 GHz

2

nd

harmonic

9 kHz - 100 MHz

100 MHz - 300 MHz

300 MHz - 600 MHz

600 MHz - 5.2 GHz

5.2 GHz - 13 GHz

13 GHz - 150 GHz

30 MHz

300 GHz

150 GHz - 300 GHz

Note 1: These parameters reflect the increasing difficulty in undertaking real tests, especially at frequencies

approaching

or

beyond

110

GHz,

taking

into

account

such

factors

as

availability

and

usability

of

suitable measurement equipment. In such cases, when systems with integral antenna would require

radiated

measurement,

their

antenna

gain

should

be

taken

into

account

either

with

separate

test

or

with

appropriate

theoretical

calculation.

In

some

circumstances,

it

may

be

necessary

to

extend

the

range of test

frequencies in order to facilitate better protection of other

services, including passive

services. In any case, systems having an integral antenna incorporating a waveguide section, or with

an

antenna

connection

in

such

form,

and

of

length

equal

to

at

least

twice

the

cut-off

wavelength,

should not require spurious emissions measurement below 0.7 times the waveguide cut-off frequency;

Note 2: Although measurements are outside the scope of this Recommendation, it is recognised that testing at

higher

frequency

may

not

have

a

defined

measurement

uncertainty

due

to

absence

of

primary

references. In addition further simplifications of measuring techniques to achieve time/cost savings,

while still guaranteeing with fair confidence the fulfilment of the requirement may be possible.

4)

that the following reference bandwidths should be used:

?

1 kHz

between

9 and 150 kHz

?

?

?

Note 1: A reference bandwidth is a bandwidth in which the spurious domain emission level is specified.

Note 2:

Some

services

may

use,

close

to

the

carrier,

reference

bandwidth

values

different

from

the

above;

these differences are quoted in the relevant service Annex.

Note 3:

As a special case, the reference bandwidth of all space stations? spurious domain emissions should be

4 kHz.

Note 4:

The reference bandwidths for specifying spurious emissions in case of radar systems are provided in

Appendix 3 of the Radio Regulations (see §

10). The bandwidths required for proper measurement of

radar

spurious

domain

emissions

should

be

calculated

for

each

particular

radar

system,

and

the

measurement methods should be guided by the Recommendation ITU-R M.1177.

Note 5:

As

a

general

rule,

the

resolution

bandwidth

of

the

measuring

receiver

should

be

equal

to

the

reference bandwidth as given in this recommend. To improve measurement accuracy, sensitivity and

efficiency,

the

resolution

bandwidth

can

be

different

from

the

reference

bandwidth.

When

the

resolution bandwidth is smaller than the reference bandwidth, the result should be integrated over the

reference

bandwidth.

When

the

resolution

bandwidth

is

greater

than

the

reference

bandwidth,

the

Edition of January, 2011

10 kHz

100 kHz

1 MHz

between

between

above

150 kHz and 30 MHz

30 MHz and 1 GHz

1 GHz

CEPT/ERC/REC 74-01

Page 5

result

for

broadband

spurious

emissions

should

be

normalised

to

the

bandwidth

ratio.

For

discrete

spurious emissions, normalisation is not applicable, while integration over the reference bandwidth is

still applicable;

5)

6)

that the levels of spurious domain emissions should be defined within a reference bandwidth;

that the appropriate spurious domain emission limits should be applicable to all services as detailed by Table 2.

Unless the Peak Envelope Power (PEP) is explicitly quoted, the spurious domain emission limits specified in

this Recommendation from the transmitter into the antenna port are in terms of mean power. The mean power

(P) of any spurious domain transmission

from a burst transmitter is the

mean power averaged over the burst

duration.

Note 1:

In special cases, such as those referred in considering h), tighter limits may be required.

Note 2:

It is recognised that, in principle, in some cases of narrowband and/or high power transmitters for all

categories of services, there may be difficulties in meeting limits close to +/- 250% of the necessary

bandwidth. These cases are reported in the service specific annexes, referred to in Table 2.

Note 3:

When a system is coupled to an

combined

system;

therefore

compliance

should

be

verified

through

an

e.i.r.p.

measurement

(either

near-field or far- field) and subsequent conversion to absolute power/attenuation values delivered to

the

transmission

line,

taking

into

account

only

the

conventional

gain

(directivity)

of

the

antenna.

7)

8)

that for the fast switching induced spurious domain emissions, an additional limit for their peak power will be

necessary,

however

further

study

should

be

carried

out

to

investigate

the

nature

of

the

phenomenon

prior

to

fixing specific limits;

that, the limits specified within this Recommendation should be considered for new ETSI standards developed

after the date at which the Recommendation is adopted.

Note 1:

In the case where the limits referred to in this Recommendation are found to be more stringent than

existing ETSI Standards (TBR/ETS/EN/ES), a revision process may need to be considered. If revised,

the

standard

should,

whenever

technically

and

economically

feasible,

meet

the

limits

in

this

Recommendation.

Note 2:

Where either CEPT or ETSI consider the limits defined in this Recommendation are inappropriate

for a particular standard an agreement on alternative limits should be reached by application of the

MoU between ETSI and CEPT.

that

for

all

cases

not

covered

in

this

Recommendation,

the

Recommendation

ITU-R

SM.329

should

apply;

however, where applicable, ETSI standards or Recommendations ITU-R, if any, should be taken into account

for methods of measurement of spurious emissions of specific services;

that administrations should afford all practical protection to the frequency bands utilised by the services using

passive sensors, referred to in

considering g)

(interference threshold values for these services are established by

the relevant ITU-R Recommendations). When bringing new services into operation, administrations are urged

to note that transmitters can cause severe interference to other services through their spurious and out-of-band

emissions, including remote side-bands;

that when measuring spurious emissions of receivers, no frequency range exclusion, such as the 250% of the

necessary bandwidth limit, quoted in

recommends 1

should apply. Measurements should be made in accordance

with

recommends

3

,

where

the

fundamental

frequency

range

should

include

the

highest

oscillator

frequency

used in the receiver and the harmonics are those of the highest oscillator frequency;

that the active state of a transmission station is defined as the state which produces the authorised emission;

that the idle/standby state of a transmission station is defined as the state where the transmitter is available for

traffic, but is not in the active state.

9)

10)

11)

12)

13)

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CEPT/ERC/REC 74-01

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Table 2

SPURIOUS DOMAIN EMISSION LIMITS

Type of service (Note 1)

Fixed Service

Land Mobile Service (Note 2) and Maritime Mobile

Service (VHF) (mobile and base stations)

Space Services

Broadcasting

Radar Systems in the Radiodetermination Service

Amateur services

See Annex 1

See Annex 2

Limits

See Annex 3

See Annex 4

See Annex 5

See Annex 6

Emergency position-indicating radio beacon,

Emergency locator transmitter,

No limit

Personal location beacon,

Search and rescue transponder,

Ship emergency, lifeboat, and survival craft transmitters;

and

Land, aeronautical or maritime transmitters when used in

emergency.

All other services, except

those quoted above:

Transmitters

Limits specified in Appendix 3 of the

Radio Regulations apply

Receivers and idle/standby

- 57 dBm, for

9 kHz

?

f

?

1 GHz

transmitters

- 47 dBm, for

1 GHz <

f

?

F

UPPER

(see recommend 11)

Note 1: In the relevant annexes referenced in Table 2

, “analogue” and “digital” systems are referred to; for this

purpose systems employing any modulation scheme that uses digital processing to quantise the carrier

modu

lation are classified as “digital” systems.

Note 2: Annex 2 contains limits for land mobile systems (e.g. public cellular radio, professional mobile radio

and radio local area networks) and also contains limits applicable to systems using similar technologies

(e.g. Short Range Devices, CB (citizens band), cordless telephones, radio microphones).

”

Note:

Please check the ECO web

site (http//:/eco) for the

up to date position on the implementation of this and

other ECC/ERC Recommendations.

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CEPT/ERC/REC 74-01

Annex 1, Page 7

Annex 1

FIXED SERVICE SPECIFIC REQUIREMENTS

1. Informative background

Fixed

Service

Digital

Radio

Systems

presently

referred

to

in

the

specific

ETSI

TM4

work

programmes,

and

used

in

CEPT

countries,

cover

a

very

wide

range

of

frequency

bands

of

emission,

traffic

capacity,

channel

separations and modulation formats of which typical parameters are as follows:

-

-

-

-

frequency band

traffic capacity

from below 1 GHz to 95 GHz;

from 9.6 kbit/s up to Multi-Gigabit transport;

channel separations

from 25 kHz up to ~ 5 GHz in the highest bands;

modulation formats

from

2

to

1024

states

(amplitude

and/or

phase

and/or

frequency

states).

Analogue

TV

distribution

systems

are

the

main

analogue

Radio

Relay

Systems

of

practical

interest

still

in

operation in some countries. The necessary bandwidth of such analogue TV distribution systems is not defined

in any Recommendation ITU-R, moreover, a wide variety of above-video sub-carriers are usually added to the

main TV carrier.

Broadband Wireless Access (BWA) systems are used for the deployment of radio access networks in both the

fixed service and the mobile service. They typically operate at frequencies up to 6 GHz and are considered to

use terminal stations with antenna gain less than about 20 dBi.

2. Limits

Recommendation

ITU-R

F.1191

requires

that,

for

Digital

Radio

Systems,

operating

on

a

specific

radio-

frequency

channel

arrangement,

the

frequency

boundaries

between

spurious

and

out- of-band

domains

are

?

250%

of

the

relevant

Channel

Separation

(CS).

Therefore,

for

the

purpose

of

this

Recommendation,

the

frequency

boundaries

for

spurious

domain

emissions

of

analogue

and

digital

fixed

service

systems

are

taken,

whenever

applicable,

as

?

250%

of

the

relevant

CS

of

the

radio-frequency

channel

arrangement

where

the

system is to be placed.

According

to

Recommendation

ITU-R

F.1191,

the

Channel

Separation

(CS)

is

taken

as

XS

/2

for

alternated

frequency

channel

arrangements

and

XS

for

co-channel

and

interleaved

frequency

channel

arrangements

as

defined by Recommendation ITU-R F.746.

In addition for systems with CS > 500 MHz the boundary, according Recommendation ITU-R SM.1539, should

be reduced to ±

(500 MHz + 150% of the relevant CS).

Table 1.1 below establishes the spurious domain emission limits for systems in the fixed service.

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Annex 1, Page 8

Table 1.1

SPURIOUS DOMAIN EMISSION LIMITS FOR SYSTEMS IN THE FIXED SERVICE

Reference

Type of equipment

number

1.1.1

1.1.2

Fixed Service -

Transmitters (all stations

except those below)

Fixed Service

–

Terminal stations (remote

stations with subscriber

equipment interfaces)

(note 2)

BWA systems operating

between 1 GHz and 6 GHz

(all transmitting stations)

Fixed Service -

Receivers and idle/standby

transmitters, except those

below

BWA systems operating

between 1 GHz and 6 GHz

- Receivers and

idle/standby transmitters

Limits

mean power or, when applicable, average power during

bursts duration in the applicable reference bandwidth (see

recommend

4

)

-50 dBm

,

for 9 kHz

?

f

?

21.2 GHz

(note 1)

-30 dBm

,

for 21.2 GHz <

f

?

F

UPPER

(see

recommend 3

)

(note 1) (note 3)

-40 dBm

,

for 9 kHz

?

f

?

21.2 GHz

(note 1)

-30 dBm

,

for 21.2 GHz <

f

?

F

UPPER

(see

recommend 3

)

(note 1) (note 3)

-36 dBm, for

-30 dBm

,

for

9 kHz

?

f

?

1 GHz

(note 1)

1 GHz <

f

?

F

UPPER

(see

recommend 3

)

(note 1)

1.1.3

1.1.4

The same limits as for the transmitters above apply

1.1.5

- 57 dBm, for

- 47 dBm, for

9 kHz

?

f

?

1 GHz

1 GHz <

f

?

F

UPPER

(see

recommend 11

)

Note 1: For digital systems it is necessary to provide one or more steps of reference bandwidth to produce suitable

transition area for the spectral density to manage the required limit because in some frequency bands and/or

applications narrow-band RF filters are not technically or economically feasible.

Consequently, just outside the

?

250% of the relevant Channel Separation, the limit of spurious domain

emissions are defined with reference bandwidths as detailed by the specific Figure 1.1 and the related Table

1.2 and for BWA systems the specific Figure 1.2 and related Table 1.3.

Note 2: Point-to- Multipoint systems used in CEPT countries foresee three kind of stations:

-MS

Master (Central) Station (clearly identifiable in Recommendation ITU-R SM.329)

-TS

Terminal Station (also clearly identifiable in Recommendation ITU-R SM.329)

-RS

Repeater Station (which is not referred in Recommendation ITU-R SM.329);

Repeater

Stations

of

Point-to-multipoint

systems

will

be

considered

as

Terminal

stations

when

they

are

intended for use only in Remote stations not co-located with any other Fixed radio equipment classified as

Central station.

When considering Multipoint- to-Multipoint (mesh) access systems, Multipoint- to-Multipoint stations

providing co- frequency coverage to a defined area, without addressing any specific Terminal Station (in

terms of antenna radiation pattern), should be considered as Master Station.

Note 3: It is recognised that, for Multipoint systems, with fundamental operating frequency higher than 21.2 GHz,

ETSI EN 301 390 identifies that the limits, reported in this CEPT Recommendation, developed at earlier

stage, are not enough stringent in the HDFS bands (21.2 GHz to 43.5 GHz) in order to safely deploy the

large foreseen number of systems.

Therefore, in developing the Harmonised Standards under 1999/05/EC Directive (R&TTE Directive) for

Multipoint systems, the more stringent limits, reported in ETSI EN 301 390 for those bands, have been

adopted among essential requirements under article 3.2 of the R&TTE Directive.

In extreme cases, typically above 26 GHz and mostly due to the use of external mixers in the test set-up,

it still may not be possible to achieve enough sensitivity to verify that the Equipment Under Test (EUT)

conforms to the specification requirement under modulated condition. In these cases, the measurement

may be carried out in un-modulated (CW) conditions. The spurious domain in the CW condition may

be corrected for those emissions that are subject to the modulation process, by an amount equal to the

modulation

loss

of

the

EUT

(i.e.

the

difference

in

dB

between

the

power

output

and

the

power

measured in the reference bandwidth at centre frequency of the carrier).

Edition of January, 2011

CEPT/ERC/REC 74-01

Annex 1, Page 9

Centre Frequency of the emission

Out-of-band domain emissionlimit

e.g. ETSI spectrum mask

Ref.

Bw = 0.3 kHz

Ref.

B

w = 1 kHz

Ref.

B

w = 10 kHz

Ref.

Bw = 100 kHz

Ref.

Bw =

see recommend 4

CS

Ref.

Bw = 0.3 kHz

Ref.

Bw =

see recommend 4

Ref.

B

w = 100 kHz

Ref.

B

w = 10 kHz

Ref.

B

w = 1 kHz

250% CS

Lower frequency limit:

see recommend 3

2

F

b

2

F

a

2

F

c

Upper frequency limit:

see recommend 3

2

F

d

Note:

?

Fd frequency steps are not applicable if lower than 1 GHz

?

Fc frequency steps are not applicable if lower than 30 MHz

?

Fb frequency steps are not applicable if lower than 150 kHz

Figure 1.1: Specific mask for spurious domain emission limits (see Table 1.2)

Edition of January, 2011

CEPT/ERC/REC 74-01

Annex 1, Page 10

Table 1.2

VALUES OF Fa, Fb, Fc and Fd in Fig. 1.1.

Fundamental

Emission

Frequency

Below

21.2 GHz

(Terminal stations)

(Note1)

Below

21.2 GHz

(Other stations)

(Note1)

Above 21.2 GHz

(All stations)

Channel

Separation

(CS)

(MHz)

0.01

?

CS

?

1

1

?

CS

?

10

CS

?

10

0.01

?

CS

?

1

1

?

CS

?

10

CS

?

10

1

?

CS

?

10

CS

?

10

Typical

Symbol

Frequency

(~Mbit/s)

Fs

?

0.006

?

0.8

Fs

?

0.6

?

8

Fs~>6

< br>Fs

?

0.006

?

Fs

?

0.6< /p>

?

8

Fs~>6

Fs

?

0.6

?

< br>8

Fs>~6

Ref. BW

0.3 kHz

Fa*

(MHz)

-

-

-

3.5

-

-

-

-

Ref. BW

1 kHz

Fb*

(MHz)

-

-

-

7

14 (**)

-

-

-

Ref. BW

10 kHz

Fc*

(MHz)

14

28

49 (**)

14

28

49 (**)

-

-

Ref. BW

100 kHz

Fd*

(MHz)

70

70

70 (**)

70

70

70 (**)

70

-

Note 1: Excluding BWA systems operating between 1 GHz and 6 GHz for which limits of Figure 1.2 and Table

1.3 apply.

(*): The frequency limits are defined with respect to the centre frequency of the emissions. For measurement

purposes, the reference bandwidth given in Table 1.2 apply to the frequency range extending from the ±

250%

CS points to the first frequency limit indicated, from Fa to Fb, from Fb to Fc, or from Fc to Fd as appropriate.

(**): Not applicable for CS where the 250% point exceeds these values.

Note:

It is recognised that, depending on the characteristic of the domains, the actual power density relative to

the

ETSI

mask

at

the

?

250%

boundary,

when

evaluated

in

the

reference

bandwidth

of

one

or

more

steps of Table 1.1, may be lower than the

spurious domain emission limit

itself. In such cases these

steps

are

not

applicable

and

the

first

applicable

spurious

domain

emission

reference

bandwidth

step,

which corresponds to a power density equal or lower than that evaluated

with the ETSI

mask in the

same reference bandwidth should be extended back to the

?

250% boundary (examples of this concept

are shown in Figure 1.3.)

Edition of January, 2011

CEPT/ERC/REC 74-01

Annex 1, Page 11

Centre Frequency of the emission

Out-of-band domain emission limit

Ref.

B

w = 30 kHz

Ref.

B

w =

see recommend 4

Lower frequency limit:

see recommend 3

Ref.

B

w = 300 kHz

NB

250% NB

2

F

a

2

F

b

Upper frequency limit:

see recommend 3

Ref.

B

w = 1 MHz

Figure 1.2: Specific mask for spurious domain emissions for BWA systems

operating between 1 GHz and 6 GHz

(see Table 1.3)

Table 1.3

Fa*

Fb*

500 kHz or 10 times NB, whichever is the greater

1 MHz or 12 times NB, whichever is the greater

Frequency references for Figure 1.2

Edition of January, 2011