SIST EN 302 062 V1.1.1:2003

SLOVENSKI STANDARD
01-december-2003
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Fixed Radio Systems; Point-to-point equipment; High capacity digital radio relay systems
carrying STM-4, 4 x STM-1 or 2 x STM-1 signals in bands with 55/56 MHz channel
spacing
Ta slovenski standard je istoveten z: EN 302 062 Version 1.1.1
ICS:
33.060.30 Radiorelejni in fiksni satelitski Radio relay and fixed satellite
komunikacijski sistemi communications systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

European Standard (Telecommunications series)

Fixed Radio Systems;
Point-to-point equipment;
High capacity digital radio relay systems
carrying STM-4, 4 × STM-1 or 2 × STM-1 signals
in bands with 55/56 MHz channel spacing

2 ETSI EN 302 062 V1.1.1 (2003-01)

Reference
DEN/TM-04105
Keywords
DFRS, digital, DRRS, point-to-point, radio, SDH,
transmission
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ETSI
3 ETSI EN 302 062 V1.1.1 (2003-01)
Contents
Intellectual Property Rights.5
Foreword.5
1 Scope.6
2 References.7
3 Symbols and abbreviations.10
3.1 Symbols.10
3.2 Abbreviations.10
4 General characteristics.11
4.1 Frequency bands and channel arrangements .11
4.1.1 Channel arrangements.11
4.1.2 Channel spacing for systems operating on the same route.12
4.2 Compatibility requirements between systems .12
4.3 Performance and availability requirements .12
4.4 Environmental profile.12
4.4.1 Equipment within weather protected locations (indoor locations).13
4.4.2 Equipment for non-weather protected locations (outdoor locations).13
4.5 Power supply.13
4.6 Electromagnetic compatibility.13
4.7 System block diagrams.13
4.8 Telecommunications Management Network (TMN) interface.14
4.9 Branching/feeder/antenna characteristics.14
4.9.1 Antenna radiation patterns .14
4.9.2 Antenna Cross-Polar Discrimination (XPD).14
4.9.3 Antenna Inter-Port Isolation (IPI).14
4.9.4 Waveguide flanges (or other connectors) .14
4.9.5 Return loss.15
5 System parameters.15
5.1 Transmission capacity.15
5.2 Baseband parameters.15
5.2.1 SDH baseband interface.15
5.3 Transmitter characteristics.15
5.3.1 Transmitter power limit .15
5.3.2 Transmit power and frequency control .16
5.3.2.1 Transmit Power Control (ATPC and RTPC) .16
5.3.2.1.1 Automatic Transmit Power Control (ATPC).16
5.3.2.1.2 Remote Transmit Power Control (RTPC) .17
5.3.2.2 Remote Frequency Control (RFC) .17
5.3.3 Transmitter output power tolerance .17
5.3.4 Transmit Local Oscillator (LO) frequency arrangements .17
5.3.5 RF spectrum mask.18
5.3.6 Discrete CW components exceeding the spectrum mask limit .20
5.3.6.1 Discrete CW components at the symbol rate .20
5.3.6.2 Other discrete CW components exceeding the spectrum mask limit .20
5.3.7 Spurious emissions.21
5.3.7.1 Spurious emissions - external.21
5.3.7.2 Spurious emissions - internal .21
5.3.8 Radio frequency tolerance .21
5.4 Receiver characteristics.21
5.4.1 Input level range .21
5.4.2 Receiver local oscillator frequency arrangements .21
5.4.3 Spurious emissions.21
5.5 System performance without diversity.22
5.5.1 BER as a function of Receiver input Signal Level (RSL).22
ETSI
4 ETSI EN 302 062 V1.1.1 (2003-01)
5.5.2 Equipment Residual BER .22
5.5.3 Interference sensitivity.22
5.5.3.1 Co-channel interference sensitivity.23
5.5.3.2 Adjacent channel Interference.23
5.5.3.3 CW Spurious Interference.23
5.5.4 Cross-Polar Interference Sensitivity for CCDP with XPIC operation .23
5.5.4.1 Co-channel "internal" interference sensitivity in flat fading conditions.24
5.5.4.2 Co-channel "internal" interference sensitivity in dispersive fading conditions.24
5.5.5 Distortion sensitivity.24
5.6 System characteristics with diversity .24
Annex A (informative): Additional information.25
A.1 Cross-Polar Discrimination (XPD) of the antenna.25
A.2 Measurement test set for XPI characteristics .25
A.3 Automatic Transmit Power Control (ATPC) .26
A.4 RBER.27
A.5 Co-channel and adjacent channel interference.28
Annex B (normative): Output Power Tolerance and RBER.30
Annex C (normative): BER measurement in a multi-interface, multi-carrier system .31
History .32

ETSI
5 ETSI EN 302 062 V1.1.1 (2003-01)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
All published ETSI deliverables shall include information which directs the reader to the above source of information.
Foreword
This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Transmission
and Multiplexing (TM).
National transposition dates
Date of adoption of this EN: 27 December 2002
Date of latest announcement of this EN (doa): 31 March 2003
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 September 2003
Date of withdrawal of any conflicting National Standard (dow): 30 September 2003

ETSI
6 ETSI EN 302 062 V1.1.1 (2003-01)
1 Scope
The present document specifies the minimum performance parameters for terrestrial digital fixed service radio
communications equipments operating in the 15 GHz to 38 GHz frequency band intended to be used for point-to-point
connections in local and regional networks at data rates between 2 × STM-1 (transported by one carrier) and 4 × STM-1
or STM-4 (transported by two 2 × STM-1 carriers).
Harmonized channel spacings of 56 MHz are not available in frequency bands below 15 GHz at the drafting date of the
present document. However, the present document can be considered as a guideline where national frequency plans
allow the use of 55/56 MHz channel spacing in other frequency bands, or where an allocation of two contiguous
28 MHz channels is possible.
The maximum transmission rate in a given bandwidth depends on system spectral efficiency, a single equipment class is
defined:
Class 5: equipment spectral efficiency based on typically 128-states modulation scheme (e.g. 128-QAM,
or equivalent).
However, for addressing different market requirements, the systems are further subdivided in two grades:
a) Adjacent Channel Alternate Polarization (ACAP as class 5a).
b) Adjacent Channel Co-Polarization (ACCP or CCDP as class 5b).
The above classes are indicative only and do not imply any constraint to the actual modulation format, provided that all
the requirements in the present document are met.
Examples of the spectrum usage are given in figure 1.
The 4 × STM-1 or STM-4 connection is achieved by two 2 × STM-1 carriers. The two carriers can be arranged in three
configurations:
a) Adjacent Channel Alternate Polarization for which ACAP, class 5a is applicable.
b) Adjacent Channel Co-polarization for which ACCP, class 5b is applicable.
c) Co-Channel Dual Polarization for which CCDP, class 5b is applicable. For this configuration, XPIC may be
used.
Examples of the three spectrum usage of a 4 × STM-1 or STM-4 system are given in figures 1a, 1b, and 1c.
A 2 × STM-1 system is achieved by using one single carrier in 55/56 MHz from any of the configurations in figure 1;
the system shall comply with the relevant spectrum efficiency classes (5a or 5b).

V V/H V
ACAP ACCP CCDP
2xSTM - 1
2xSTM- 1 2xSTM - 1 2xSTM - 1
Class 5a Class 5b Class 5b
2xSTM - 1
2xSTM - 1
H H
Figure 1a Figure 1b Figure 1c
NOTE 1: For practical reasons, for configurations in figure 1a and 1b, it may be required to separate the two carriers
due to spectrum availability. However, in all cases the two carriers system is required to be capable of
operating in at least one of the configurations shown above.
NOTE 2: Due to the internal functionality of the cross-polar interference canceller (XPIC) equipment on both
polarization of the same channel is considered to form a single CCDP system according to figure 1c.

Figure 1: System configurations
ETSI
7 ETSI EN 302 062 V1.1.1 (2003-01)
The present document, defines the parameters for 2 × STM-1 (311 Mbit/s) carriers. The performance of a 4 × STM-1 or
STM-4 system will be directly implicated from this definition, according to the spectrum efficiency classes 5a and 5b.
The parameters to be specified fall into two categories:
a) Parameters that are required to provide compatibility between channels from different sources of equipment on
the same route, connected to separate antennas.
b) Parameters defining the transmission quality of the proposed system.
The present document does not contain aspects related to test procedures and test conditions however they are to be
found in EN 301 126-1 [9].
Safety aspects are outside the mandate of ETSI and they will not be considered in the present document. However
compliance to EN 60950 [47] will be required to comply with Directive 1999/5/EC (R&TTE Directive) [8].
Technical background for most of the parameters and requirements referred in the present document may be found in
TR 101 036-1 [45].
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference/.
NOTE: In the case of undated references, the time frame of application and new certification procedures for new
releases of these normative references next to the date of the first public enquiry of the present document,
or to the first certification of the equipment shall be agreed between the supplier and the regulatory
authority. These new certification procedures will cover in any case only the parameters subject to
changes from the on going release during the previous certification.
[1] CEPT/ERC/T/R 13-02: "Preferred channel arrangements for fixed services in the range
22.0-29.5 GHz".
[2] CEPT/ERC/T/R 12-01: "Harmonized radio frequency channel arrangements for analogue and
digital terrestrial fixed systems operating in the band 37-39.5 GHz".
[3] CEPT/ERC/REC 12-07: "Harmonised radio frequency channel arrangements for digital terrestrial
fixed systems operating in the band 14.5 - 14.62 GHz paired with 15.23 - 15.35 GHz".
[4] CEPT/ERC/REC 12-03: "Harmonised radio frequency channel arrangements for digital terrestrial
fixed systems operating in the band 17.7 GHz to 19.7 GHz".
[5] CEPT/ERC/REC 01-02: "Preferred channel arrangement for digital fixed service systems
operating in the frequency band 31.8 - 33.4 GHz".
[6] CEPT/ERC/REC 74-01: "Spurious emissions".
[7] CEPT/ERC/DEC(00)07 of 19 October 2000 on the shared use of the band 17.7 - 19.7 GHz by the
fixed service and Earth stations of the fixed-satellite service (space-to-Earth).
[8] Directive 1999/5/EC of the European Parliament and of the Council of 9 March 1999 on radio
equipment and telecommunications terminal equipment and the mutual recognition of their
conformity (R&TTE Directive).
ETSI
8 ETSI EN 302 062 V1.1.1 (2003-01)
[9] ETSI EN 301 126-1: "Fixed Radio Systems; Conformance testing; Part 1: Point-to-point
equipment - Definitions, general requirements and test procedures".
[10] ETSI EN 300 833: "Fixed Radio Systems; Point-to-point Antennas; Antennas for point-to-point
fixed radio systems operating in the frequency band 3 GHz to 60 GHz".
[11] ETSI EN 300 019: "Environmental Engineering (EE); Environmental conditions and
environmental tests for telecommunications equipment".
[12] ETSI ETS 300 132-1: "Equipment Engineering (EE); Power supply interface at the input to
telecommunications equipment; Part 1: Operated by alternating current (ac) derived from direct
current (dc) sources".
[13] ETSI EN 300 132-2: "Environmental Engineering (EE); Power supply interface at the input to
telecommunications equipment; Part 2: Operated by direct current (dc)".
[14] ETSI EN 300 645: "Telecommunications Management Network (TMN); Synchronous Digital
Hierarchy (SDH) radio relay equipment; Information model for use on Q interfaces".
[15] ETSI EN 301 489 (parts 1 and 4): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services".
[16] ETSI ETS 300 635: "Transmission and Multiplexing (TM); Synchronous Digital Hierarchy
(SDH); Radio specific functional blocks for transmission of M x STM-N".
[17] ITU-R Recommendation F.595: "Radio-frequency channel arrangements for radio-relay systems
operating in the 18 GHz frequency band".
[18] ITU-R Recommendation F.636: "Radio-frequency channel arrangements for radio-relay systems
operating in the 15 GHz band".
[19] ITU-R Recommendation F.637: "Radio-frequency channel arrangements for fixed wireless
systems operating in the 23 GHz band".
[20] ITU-R Recommendation F.748: "Radio-frequency arrangements for systems of the fixed service
operating in the 25, 26 and 28 GHz bands".
[21] ITU-R Recommendation F.749: "Radio-frequency channel arrangements for radio-relay systems in
the 38 GHz band".
[22] ITU-R Recommendation F.750: "Architectures and functional aspects of radio-relay systems for
synchronous digital hierarchy (SDH)-based network".
[23] ITU-R Recommendation F.751: "Transmission characteristics and performance requirements of
radio-relay systems for SDH-based networks".
[24] ITU-R Recommendation F.752: "Diversity techniques for radio-relay systems".
[25] ITU-R Recommendation F.1093: "Effects of multipath propagation on the design and operation of
line-of-sight digital radio-relay systems".
[26] ITU-R Recommendation F.1101: "Characteristics of digital fixed wireless systems below about
17 GHz".
[27] ITU-R Recommendation F.1102: "Characteristics of fixed wireless systems operating in frequency
bands above about 17 GHz".
[28] ITU-R Recommendation F.1191: "Bandwidths and unwanted emissions of digital fixed service
systems".
[29] ITU-R Recommendation F.1397: "Error performance objectives for real digital radio links used in
the international portion of a 27 500 km hypothetical reference path at or above the primary rate".
[30] ITU-R Recommendation F.1491: "Error performance objectives for real digital radio links used in
the national portion of a 27 500 km hypothetical reference path at or above the primary rate".
ETSI
9 ETSI EN 302 062 V1.1.1 (2003-01)
[31] ITU-R Recommendation F.1492: "Availability objectives for real digital radio-relay links forming
part of international portion constant bit rate digital path at or above the primary rate".
[32] ITU-R Recommendation F.1493: "Availability objectives for real digital radio-relay links forming
part of national portion constant bit rate digital path at or above the primary rate".
[33] ITU-R Recommendation P.530: "Propagation data and prediction methods required for the design
of terrestrial line-of-sight systems".
[34] ITU-T Recommendation G.703: "Physical/electrical characteristics of hierarchical digital
interfaces".
[35] ITU-T Recommendation G.707: "Network node interface for the synchronous digital hierarchy
(SDH)".
[36] ITU-T Recommendation G.773: "Protocol suites for Q-interfaces for management of transmission
systems".
[37] ITU-T Recommendation G.783: "Characteristics of synchronous digital hierarchy (SDH)
equipment functional blocks".
[38] ITU-T Recommendation G.784: "Synchronous digital hierarchy (SDH) management".
[39] ITU-T Recommendation G.826: "Error performance parameters and objectives for international,
constant bit rate digital paths at or above the primary rate".
[40] ITU-T Recommendation G.828: "Error performance parameters and objectives for international,
constant bit rate synchronous digital paths".
[41] ITU-T Recommendation G.829: "Error performance events for SDH Multiplex and regenerator
sections".
[42] ITU-T Recommendation G.957: "Optical interfaces for equipments and systems relating to the
synchronous digital hierarchy".
[43] ITU-T Recommendation O.181: "Equipment to assess error performance on STM-N interfaces".
[44] ETSI TR 101 035 (V1.1.3): "Transmission and Multiplexing (TM); Synchronous Digital
Hierarchy (SDH) aspects regarding Digital Radio Relay Systems (DRRS)".
[45] ETSI TR 101 036-1 (V1.3.1): "Fixed Radio Systems; Generic wordings for standards on DFRS
(Digital Fixed Radio Systems) characteristics; Part 1: General aspects and point-to-point
equipment parameters".
[46] IEC 60154-2: "Flanges for waveguides. Part 2: Relevant specifications for flanges for ordinary
rectangular waveguides".
[47] EN 60950: "Information technology equipment - Safety".
ETSI
10 ETSI EN 302 062 V1.1.1 (2003-01)
3 Symbols and abbreviations
3.1 Symbols
For the purposes of the present document, the following symbols apply:
dB decibel
dBm decibel relative to 1 mW
GHz GigaHertz
kHz kiloHertz
Mbit/s Mega-bits per second
MHz MegaHertz
mW milliWatt
ns nanosecond
ppm parts per million
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ac alternating current
ACAP Adjacent Channel Alternate Polarization
ACCP Adjacent Channel Co-Polarization
ATPC Automatic Transmit Power Control
BB Base Band
BWe evaluation BandWidth (resolution bandwidth in which spectrum components are measured)
C/I Carrier to Interference ratio
CCDP Co-Channel Dual Polarization
CEPT Conference of European Posts and Telecommunications
CMI Coded Mark Inversion
CSmin minimum practical Channel Separation (for a given radio-frequency channel arrangement)
CW Continuous Wave
dc direct current
DEM DEModulator
DRRS Digital Radio Relay Systems
EIRP Equivalent Isotropically Radiated Power
EMC ElectroMagnetic Compatibility
ERC European Radiocommunications Committee
ESR Errored Second Ratio
Fc cut-off Frequency
IEC International Electrotechnical Committee
IF Intermediate Frequency
IPI Inter-Port Isolation
ITU-R International Telecommunication Union-Radiocommunications standardization sector
ITU-T International Telecommunication Union-Telecommunications standardization sector
LO Local Oscillator
MOD MODulator
PRBS Pseudo Random Binary Sequence
QAM Quadrature Amplitude Modulation
RBER Residual BER
RF Radio Frequency
RFC Remote Frequency Control
RSL Receive Signal Level
RTPC Remote Transmit Power Control
Rx Receiver
SDH Synchronous Digital Hierarchy
SOH Section OverHead
STM-N Synchronous Transport Module, level N
TM ETSI TC-Transmission and Multiplexing
ETSI
11 ETSI EN 302 062 V1.1.1 (2003-01)
TMN Telecommunications Management Network
Tx Transmitter
XPD Cross-Polar Discrimination
XPIC Cross-Polar Interference Canceller
4 General characteristics
4.1 Frequency bands and channel arrangements
4.1.1 Channel arrangements
The frequency range shall be derived from the CEPT Recommendations relevant for the frequency band.
15 GHz
The systems are required to operate in the 14,5 GHz to 14,62 GHz paired with 15,23 GHz to 15,35 GHz, with a channel
spacing of 56 MHz. The equipment shall be capable of operating to the channel plans specified in
CEPT/ERC/REC 12-07 [3] or in ITU-R Recommendation F.636 [18].
18 GHz
The systems are required to operate in the 17,7 GHz to 19,7 GHz frequency band, with a channel spacing of 55 MHz.
The equipment shall be capable of operating to the channel plans specified in CEPT/ERC/REC 12-03 [4] or ITU-R
Recommendation F.595 [17].
23 GHz
The frequency range shall be 22,0 GHz to 22,6 GHz paired with 23 GHz to 23,6 GHz. The channel arrangements shall
be in accordance with CEPT/REC/T/R 13-02 [1].
NOTE: In a transition period for the adoption of CEPT/REC/T/R 13-02 [1], different plans, derived by ITU-R
Recommendation F.637 [19], may be required on national basis.
26 GHz
The frequency range shall be 24,50 GHz to 29,50 GHz. The channel arrangements shall be in accordance with
CEPT/ERC/T/R 13-02 [1] or ITU-R Recommendation F.748 [20].
32 GHz
The frequency range shall be 31,8 GHz to 33,4 GHz. The channel arrangements shall be in accordance with
CEPT/ERC/REC 01-02 [5].
38 GHz
The frequency range shall be 37,0 GHz to 39,5 GHz. The channel arrangements shall be in accordance with
CEPT/ERC/T/R 12-01 [2] or ITU-R Recommendation F.749 [21].
ETSI
12 ETSI EN 302 062 V1.1.1 (2003-01)
4.1.2 Channel spacing for systems operating on the same route
The present document covers systems with one 2 × STM-1 carrier, or two 2 × STM-1 carriers that are combined to
STM-4 or 4 × STM-1 signals. The channel spacing for these systems is 55/56 MHz.
System bit rates and their relevant occupied spectrum are reported in table 1 (for the precise payload bit rates,
see clause 5.1).
Table 1: Digital systems channel spacings occupied spectrum channel spacings for various bit rates
Payload Bit Rate at 2 × 155 Mbit/s 4 × 155 Mbit/s
reference point Z
Equipment class 5a 5b 5a 5b
56 56 112 or 56 (figure 1c)/
Channel spacings [MHz] (figure 1a) (fig. 1b or 1c) 2 × 56 112 or 2 × 56
(figure 1a) (figure 1a or 1b)
NOTE: For 18 GHz, the occupied spectrum is 55 MHz or 110 MHz.
For regulatory purposes in national procedures for licensing radio equipment according to the present document, the
above system types shall be identified by the "system type codes" reported in annex C.
4.2 Compatibility requirements between systems
The compatibility requirements between systems are as follows:
- there shall be no requirement to operate transmitting equipment from one manufacturer with receiving
equipment from another;
- there shall not be a requirement to multiplex different manufacturers' equipment on the same antenna.
4.3 Performance and availability requirements
Equipment shall be designed in order to meet network performance and availability requirements foreseen by ITU-T
Recommendations G.826 [39] and G.828 [40].
The events for SDH multiplex and regenerator sections should be measured according to ITU-T Recommendation
G.829 [41].
The performance and availability objectives for any overall radio connection, used in the international or national
portion of the digital path, have to be based on the criteria defined in ITU-R Recommendations F.1397 [29] and
F.1492 [31], for international portion, F.1491 [30] and F.1493 [32], for the national portion.
The implication of the link design on the performance is recognized and the general design criteria reported in ITU-R
Recommendations F.752 [24], F.1093 [25], F.1101 [26] and F.1102 [27] are to be applied according the foreseen
propagation scenario reported in ITU-R Recommendation P.530 [33].
4.4 Environmental profile
The equipment shall be required to meet the environmental conditions set out in the multipart standard
EN 300 019 [11], which defines weather protected and non-weather protected locations, classes and test severity.
The equipment shall comply with all the requirements of the present document at all times when operating within the
boundary limits of the operational environmental profile of the equipment.
The environmental profile of the equipment shall be declared by the manufacturer.
The fulfilment of EN 300 019 [11] environmental profiles is voluntary and not essential from the point of view of
R&TTE Directive [8]; for this purpose any operational environmental profile, as declared by the manufacturer, shall be
used.
ETSI
13 ETSI EN 302 062 V1.1.1 (2003-01)
Any test, carried out to generate the test report and/or declaration of conformity, required to fulfil any conformity
assessment procedure foreseen by the R&TTE Directive [8] for radio equipment, shall be carried-out with the same
principles and procedures, for reference and extreme conditions, reported in clause 4.4 of EN 301 126-1 [9]. The
requirement for test at reference or extreme conditions is reported in the relevant clause of the present document
according to the principles for similar requirements in EN 301 126-1 [9].
4.4.1 Equipment within weather protected locations (indoor locations)
Equipment intended for operation within temperature controlled locations or partially temperature controlled locations
shall meet the requirements of EN 300 019 [11] classes 3.1 and 3.2 respectively.
Optionally, the more stringent requirements of EN 300 019 [11] classes 3.3 (non-temperature controlled locations),
3.4 (sites with heat trap) and 3.5 (sheltered locations) may be applied.
4.4.2 Equipment for non-weather protected locations (outdoor locations)
Equipment intended for operation within non-weather-protected locations shall meet the requirements of
EN 300 019 [11], class 4.1 or 4.1E.
Class 4.1 applies to many European countries and class 4.1E applies to all European countries.
4.5 Power supply
The power supply interface shall be in accordance with the characteristics of one or more of the secondary voltages
foreseen in ETS 300 132-1 [12] and EN 300 132-2 [13].
NOTE: Some applications may require secondary voltages that are not covered by ETS 300 132-1 [12] and
EN 300 132-2 [13].
4.6 Electromagnetic compatibility
Equipment shall operate under the conditions specified in EN 301 489 (parts 1 and 4) [15].
4.7 System block diagrams
X'
TRANSMIT
INTERFACE
STM-1
Z E A B' C D
BRANCHING
MODULATOR TRANSMITTER FEEDER
RF
STM-1
FILTER (*)
X
STM-1
D
Z
INTERFACE E A B C
BRANCHING
RECEIVER
RECEIVER
FEEDER
DEMODULATOR
RF
STM-1
(*)
FILTER
(*) NO FILTERING
NOTE 1: For the purpose of defining the measurement points, the branching network does not include a hybrid.
NOTE 2: The points shown above are reference points only; points C and C', D and D' in general coincide.
NOTE 3: Points B and C, B' and C' may coincide when simple duplexer is used.

Figure 2: 2 × STM-1 System block diagram
ETSI
14 ETSI EN 302 062 V1.1.1 (2003-01)
TRANSMIT
BRANCHING
Z' E' A' B' C' D'
TRANSMITTER FEEDER
MODULATOR
RF FILTER
(*)
X ’
INTERFACE
TRANSMIT BRANCHING
MODULATOR
Z' E' A' B' C' D'
TRANSMITTER FEEDER
RF FILTER
(*)
D
Z E A B C
RECEIVER BRANCHING
RECEIVER
DEMODULATOR FEEDER
RF FILTER
(*)
X
INTERFACE
D
Z
E A RECEIVER B BRANCHING C
RECEIVER
DEMODULATOR FEEDER
RF FILTER
(*)
(*) NO FILTERING
NOTE: A STM-4 or 4 × STM-1 interfaces are used at X and X'.

Figure 3: 4 × STM-1 or STM-4 System block diagram
4.8 Telecommunications Management Network (TMN) interface
For SDH equipment, ITU-T Recommendations G.784 [38] and G.773 [36] and ITU-R Recommendations F.750 [22]
and F.751 [23] give the general requirements for TMN interface and functionality. ETS 300 635 [16], and
EN 300 645 [14] give the radio specific functional block description and the related radio-fragment information model
respectively.
When the system is configured with STM-4 NNI interface (i.e. the two 55/56MHz channels are composing a single
STM-4 air interface), it shall be managed accordingly (e.g. when one or more STM-1 content is lost the overall
STM-4 is, in principle, considered faulty). When the system is configured in N × STM-1 it shall be managed as a single
or multiple STM-1 system.
NOTE: The standardization of TMN interface functionality is under study in ETSI TC TMN, and will be
applicable to the radio relay systems considered in the present document.
4.9 Branching/feeder/antenna characteristics
4.9.1 Antenna radiation patterns
See EN 300 833 [10].
4.9.2 Antenna Cross-Polar Discrimination (XPD)
See EN 300 833 [10].
4.9.3 Antenna Inter-Port Isolation (IPI)
See EN 300 833 [10].
4.9.4 Waveguide flanges (or other connectors)
When flanges are required at reference point C, C', the flanges shall be used according to IEC 60154-2 [46].
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15 ETSI EN 302 062 V1.1.1 (2003-01)
4.9.5 Return loss
Equipments according to the present document are likely to have integral antennas or very similar technical solutions,
without long feeder connections; return loss is not considered essential, therefore no specific requirement is necessary.
5 System parameters
5.1 Transmission capacity
Payload bit rates considered in the present document are:
• 311,040 Mbit/s (2 × STM-1).
• 622,080 Mbit/s (STM-4, 4 × STM-1)
5.2 Baseband parameters
All the following specified baseband parameters refer to point X and X' of figures 2 or 3. Parameters for service
channels and wayside traffic channels are outside the scope of the present document.
5.2.1 SDH baseband interface
The SDH baseband interface shall be in accordance with ITU-T Recommendations G.703 [34], G.707 [35], G.783 [37],
G.784 [38], G.957 [42] and ETS 300 635 [16].
One or more of the following baseband interfaces shall be implemented:
- STM-4 optical interface (ITU-T Recommendation G.957 [42]);
- 2 or 4 × STM-1 optical interface (ITU-T Recommendation G.957 [42]);
- 2 or 4 × STM-1 CMI electrical interface (ITU-T Recommendation G.703 [34]).
The use of reserved bytes contained in the SOH, and their termination shall be in accordance with ITU-R
Recommendation F.750 [22]. Further details on the possible use of the SOH bytes including additional RFCOH or
RCSOH are given in TR 101 035 [44].
5.3 Transmitter characteristics
The specified transmitter characteristics shall be met with the appropriate baseband signals applied at reference point X'
of figure 2 or 3 with the system in full load condition. In case that more than one interfaces is present (i.e. 2 × STM-1 or
4 × STM-1), the test signal shall be applied to all interfaces. The applicable test signal for testing an SDH interface is
defined in ITU-T Recommendation O.181 [43].
5.3.1 Transmitter power limit
Transmitter maximum mean output power at reference point C' of the system block diagram (figure 2) shall not exceed
+30 dBm (including tolerance and, if applicable, ATPC/RTPC influence).
Regulatory administrations may define nominal sub-ranges below this maximum limit. In particular for 18 GHz band
CEPT/ERC/DEC(00)07 [7] requires that the eirp is limited to the minimum necessary to fulfil the performance
objectives of the link.
A capability for output power level adjustment may be required for regulatory purposes, in which case the range of
adjustment, either by fixed or automatic attenuators, should be in steps of 5 dB or less.
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16 ETSI EN 302 062 V1.1.1 (2003-01)
5.3.2 Transmit power and frequency control
These requirements are considered essential under article 3.2 of R&TTE Directive [8].
5.3.2.1 Transmit Power Control (ATPC and RTPC)
Automatic Transmit Power Control (ATPC) and Remote Transmit Power Control (RTPC).
From the point of view of hardware implementation, Automatic Transmit Power Control (ATPC) and Remote Transmit
Power Control (RTPC) functions are made by an electronic attenuator implemented along the transmitting chain (e.g. at
IF or at RF level or at both level) and can be realized in a mixed configuration, e.g.:
- ATPC only is implemented;
- RTPC only is implemented;
- ATPC + RTPC are implemented with separate attenuator functions;
- ATPC + RTPC are implemented with a single attenuator complying both functions with different command
functions (either HW or SW) and the ranges of both may be traded-off from a maximum available attenuation.
5.3.2.1.1 Automatic Transmit Power Control (ATPC)
For all bands except 18 GHz, the following apply:
ATPC is an optional feature. Equipment with ATPC will be subject to manufacturer declaration of ATPC ranges and
related tolerances. The manufacturer shall also declare if the equipment is designed with ATPC as a fixed permanent
feature.
For the 18 GHz band the following apply:
For sharing between FS and FSS, ATPC will become a mandatory feature for all new equipment to be deployed after
the date referred by CEPT/ERC/DEC(00)07 [7], however the actual usage of ATPC will be required only where
practical, depending on local sharing conditions with Satellite Services and local deployment conditions in existing
networks. The ATPC range is not subject to standardization. Manufacturer shall declare ATPC ranges and related
tolerances.
Testing shall be carried out with output power level corresponding to:
- ATPC set manually to a fixed value for system performance (clauses 5.5 and 5.6);
- ATPC set at maximum available power for transmit performance (clause 5.3).
It shall be verified that the emitted RF spectrum is within the absolute RF spectrum mask evaluated for the maximum
available output power of the equipment, including the attenuation introduced by RTPC, if any.
NOTE: Administrations should explicitly state whether ATPC is used as a regulatory measure for either
frequency coordination or as a mitigation technique to protect other services in its radio interface
notification according to article 4.1 of the R&TTE Directive [8]. In this particular case the following
applies:
when required for frequency coordination the transmitter output power must meet the spectrum
mask limits throughout the ATPC range. This does not apply for 18 GHz, since it is required as a
mitigation technique for FS and FSS sharing which is based on EIRP considerations and not on
NFD values.
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17 ETSI EN 302 062 V1.1.1 (2003-01)
5.3.2.1.2 Remote Transmit Power Control (RTPC)
RTPC is an optional feature. Equipment with RTPC will
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