OFCOM  
Rue de l’Avenir 44  
Case postale  
CH-2501 Biel -Bienne  
www.ofcom.admin.ch  
  
 Federal Department of Environment,  
Transport, Energy and Communications DETEC  
Federal Office of Communications OFCOM 
Equipment and International Frequency Management Division 
Market acces and C onformity  
  
NT-3003  V0.0.2 
 
Technical Standard  
concerning  
DAB/DAB+ In -House low power Repeaters  
 
 
Titre en français:  Norme technique  concernant les réémetteurs DAB  bande III  de faible 
puissance destinés à être exploités à l'intérieur d'immeubles . 
Titel auf Deutsch:  Technische Norm  betreffend die low  power  Band III  DAB  Umsetzer , welche 
in Gebäude eingesetzt werden.  
Titolo in italiano:  Norma tecnica  relativa a ripetitori  DAB  band III low power  destinati ad 
essere esercitati nelle case.  
Edition:  V0.0.2 (11.09 .2013)  
Coming into force:  01.01.2014  
  
NT-3003  
 
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 Contents  
1 Scope ........................................................................................................................... 4 
2 References  .................................................................................................................. 4 
2.1 Normative references  .................................................................................................  4 
2.2 Legal references  ......................................................................................................... 4 
2.3 Informative references  ................................................................................................ 4 
3 Definitions and abbreviations  .................................................................................... 5 
3.1 Definitions  .................................................................................................................. 5 
3.2 Abbreviations  .............................................................................................................. 6 
4 Technical requirements specifications  ..................................................................... 6 
4.1 Introduction  ................................................................................................................ 6 
4.2 Environmental profile  .................................................................................................. 7 
4.3 Nominal DAB RF -test signal  ....................................................................................... 7 
4.4 Interpretation of the measurement results  .................................................................. 7 
4.5 Requirements  ............................................................................................................. 8 
4.5.1  Basic rules, EG 200 053  ................................................................................. 8 
4.5.2  Maximal output radiated power  ....................................................................... 8 
4.5.3  Intermodulation products  ................................................................................. 8 
4.5.4  Spurious emissions  ......................................................................................... 9 
4.5.5  Repeater gain  .................................................................................................  9 
5 Testing for compliance with technical requirements  ............................................. 10 
5.1 Essential radio test suites  ......................................................................................... 10 
5.1.1  Maximal output radiated power  ..................................................................... 10 
5.1.2  Intermodulation products ............................................................................... 11 
5.1.3  Spurious emission  ......................................................................................... 11 
5.1.4  Maximum in -band gain  .................................................................................. 12 
5.1.5  Maximum out -of-band gain ............................................................................ 12 
6 Repealed documents  ................................................................................................ 13 
Annex A (normative): Requirements and conformance test specifications table  ............. 14 
 NT-3003  
 
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 Foreword / int roduction / Einführung / introduzione  
This technical standard specifies, for Band III DAB/DAB+ In -House low power Repeaters , the 
essential requirement  of effective use of the spectrum according article 7 paragraph 3 TIO 
(Ordinance on Telecommunications Installations [l.2]). Products manufactured in compliance with 
the requirements of this technical standard benefit from a presumption of conformity with the 
corresponding essential requirements. This standard is  published in the Official Federal Gazette 
as designated technical standard in accordance with Article 31 paragraph 2 letter a TCA 
(Telecommunications Act of 30 April 1997 [l.1] ) and Article 4 paragraph 2 TIO [l.2].  
Cette norme technique concrétise pour les réémetteurs de faible puissance DAB/DAB+ bande III 
destinés à être exploités à l'intérieur d'immeubles , l’exigence essentielle d’utilisation efficace du 
spectre selon l’art. 7 al. 3 de l’OIT (Ordonnance sur les installations de télécommunication[l.2]). Son respect permet de présumer que cette exi gence essentielle est remplie. Elle est publiée 
dans la Feuille fédérale comme norme désignée selon l'art. 31, al. 2, let. a, LTC (Loi sur les 
télécommunications du 30 avril 1997 [l.1]) et art. 4, al. 2, OIT ([l.2]).  
Le reste de ce document est rédigé en l angue anglaise.  
Diese technische Norm legt für Band III DAB/DAB+ Indoor  low power Repeaters , die 
grundlegenden Anforderungen bezüglich effizienter Nutzung des Spektrums in Übereinstimmung 
mit Art. 7 Abs. 3 FAV (Verordnung über Fernmeldeanlagen [l.2]) fest . Werden die in dieser 
technischen Norm aufgeführten Anforderungen eingehalten, so wird vermutet, dass diese 
grundlegende Anforderung erfüllt ist. Diese Norm ist im Amtsblatt als bezeichnete Norm in 
Übereinstimmung mit Art. 31 Abs. 2 Bst. a FMG (Fernmeldeg esetz vom 30. April 1997 [l.1]) und 
Art. 4 Abs. 2 FAV [l.2] publiziert.  
Der Rest dieses Dokumentes ist in englischer Sprache verfasst.  
Questa norma tecnica concretizza, per i ripetitori Band III DAB/DAB+ Indoor  low power 
Repeaters , l'esigenza fondamentale per l’uso efficace dello spettro ai sensi dell'art. 7 cpv. 3, OIT 
(Ordinanza sugli impianti di telecomunicazione [l.2]). Il rispetto di questa norma tecnica presume 
che questa esigenza fondamentale sia adempiuta. Questa norma è pubblicata nel Foglio federale 
come norme designata ai sensi dell'art. 31, cpv. 2, lett. a, LTC (Legge del 30 aprile 1997 sulle 
telecomunicazioni [l.1]) e dell'art. 4, cpv. 2, OIT (Ordinanza sugli impianti di telecomunicazione 
[l.2]).  
Il resto del documento è scritto in lingua inglese.  
  NT-3003  
 
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 1 Scope  
The present document specifies the technical characteristics, test methods, limits and the 
requirements for low power In- door DAB/DAB+  Repeater . The present document is applicable to 
band- selective, bloc-selective  and channel selective DAB/DAB+  repeater systems operating on 
radio frequencies in the Band III  (174-230 MHz) . 
2 References  
References are either specific (identified by date of publication and/or edition number or version number) or non -specific. For specific re ferences, only the cited version applies. For non- specific 
references, the latest published version of the reference document (including any amendments) 
applies.  
2.1 Normative references  
The following referenced documents are necessary for the application of the present document.  
[1] ETSI EN 302 077- 1 " Electromagnetic compatibility  and Radio spectrum Matters 
(ERM);  Transmitting equipment for the Terrestrial - Digital Audio Broadcasting 
(T-DAB) service;  Part 1: Technical characteristics and test methods " 
[2]  ETSI EN 300 401 "Radio Broadcasting Systems;  Digital Audio Broadcasting 
(DAB) to mobile,  portable and fixed receivers  " 
[3] ETSI TR 100 028 (all parts) (V1.4.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM); Uncertainties in the measurement of mobile radio 
equipment characteristics".  
[4] ETSI EG 200 053 "Electromagnetic compatibility and Radio spectrum Matters 
(ERM); Radio site engineering for radio equipment and systems".  
2.2 Legal references  
The following referenced documents are legal documents.  
[l.1] SR 784.10; Telecommunications Act of 30 April 1997 (TCA).  
[l.2] SR 784.101.2; Ordinance of 14 June 2002 on Telecommunications Installations 
(TIO).  
[l.3] SR 784.101.21 / RIR0201- 35; Technical interfaces regulations  In-door low 
power DAB/DAB+ Repeater  Band III . The technical interface regulations are 
published in annex 2 of the decree of OFCOM on telecommunication equipment 
OOIT; SR 784.101.21.  
2.3 Informative references  
The following referenced documents are not necessary for the applicat ion of the present 
document but they assist the user with regard to a particular subject area.  
[i.1] 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).  NT-3003  
 
1000 348814  5/15 
 3 Definitions and abbreviations  
3.1 Definitions  
For the purposes of the present document, the following terms and definitions apply:  
antenna port: port of an  apparatus which is designed, in normal operation, to be connected to an 
antenna using coaxial cable 
band selective repeater: repeater which is designed for operation on more than one frequency 
channel.  
bloc selective repeater: repeater which is designed for operation on a single DAB/DAB+ 
frequency bloc.  
broadcasting service: radiocommunication service in which the transmissions are intended for 
direct reception by the general public  
NOTE:  This service may include sound transmissions, television transmissions or other types of 
transmission.  
cabinet radiat ion: radiation from an enclosure containing, equipment, excluding radiation from 
connected antennas or cables  
channel selective repeater: repeater which is designed for operation on a frequency channel 
(one channel = 4 DAB/DAB+ frequency blocs).  
class of emission: set of characteristics of an emission, designated by standard symbols, e.g. 
type of modulation of the main carrier, modulating signal, type of information to be transmitted, 
and also, if appropriate, any additional signal characteristics  
DAB/DAB+ repeater: directional Radio Frequency (RF) amplifier which is used to amplify and 
transmit a received DAB/DAB+ signal in the DAB frequency band (e.g signal from a DAB+ base station) . 
dBc:  decibels relative to the unmodulated  carrier power of the emission 
NOTE:  In the cases which do not have a carrier, for example in some digital modulation schemes 
where the carrier is not accessible for measurement, the reference level equivalent to dBc is 
decibels relative to the mean power P.  
dBi: decibels relative to  the hypothetical isotropic antenna, which uniformly distributes energy in 
all directions  
enclosure port: physical boundary of the apparatus through which electromagnetic fields may 
radiate or impinge  
NOTE:  In the case of integr al antenna equipment, this port is inseparable from the antenna port.  
frequency channel:  frequency band covering four DAB/DAB+ frequency blocs   
harmonic: component of order greater than 1 of the Fourier series of a periodic quantity  
intermodulation  products: unwanted frequencies resulting from intermodulation between 
carriers or harmonics of emission, or between any oscillations generated to produce the carrier  
mean power: average power supplied to the antenna port by a transmitter during an interval of 
time sufficiently long compared with the lowest frequency encountered in the modulation 
envelope taken under normal operating conditions  
necessary bandwidth: for a given class of emission, the width of the frequency band which is 
sufficient to ensure the transmission of information at the rate and with the quality required under 
specified conditions  
rated output power: power that the transmitter or transposer shall deliver at its output under 
specified conditions of operation  NT-3003  
 
1000 348814  6/15 
 reference bandwidth: bandw idth in which the emission level is specified 
RMS power:  the apparent power of an AC power that is calculated by multiplying root -mean -
square ( rms) current by the root mean square voltage  
NOTE 1:  In a purely resistive circuit this is held to be the equival ent heating effect of a DC power and 
can be deemed to be true power. In a circuit that consists of reactance as well as resistance 
the apparent power is greater than the true power (the vector difference between true power 
and apparent power is called reac tive power).  
 True Power = Vrms x (Irms ∆ cos Ø)  
 Where Δ cos Ø is the phase difference between voltage and current introduced by the 
reactance of the load.  
NOTE 2:  From the above definition it becomes clear that unless any measuring system can be complete ly devoid of reactance then the measured power cannot be considered to be RMS 
power. It therefore becomes apparent that this parameter would be difficult to measure with 
any degree of accuracy at RF  frequencies.  
spurious emissions: emissions on a frequency  or frequencies which are outside the necessary 
bandwidth and the level of which may be reduced without affecting the corresponding 
transmission of information. Spurious emissions include harmonic emissions, parasitic emissions 
and intermodulation products.  
3.2  Abbreviations  
For the purposes of the present document, the following abbreviations apply:  
BER  Bit Error Ratio  
COFDM  Coded Orthogonal Frequency Division Multiplex  
CW Continuous Wave  
EMC  ElectroMagnetic Compatibility  
EUT  Equipment Under Test  
Hz Hertz (cycles per second)  
IEC International Electrotechnical Commission  
IF Intermediate Frequency  
ITU International Telecommunications Union  
PRBS  Pseudo Random Binary Sequence  
R&TTE  Radio and Telecommunications Terminal Equipment  
RF Radio Frequency  
rms root mean square  
SFN Single Frequency Network  
T-DAB  Terrestrial - Digital Audio Broadcast 
Tx Transmitter  
VHF  Very High Frequency  
W Watt 
4 Technical requirements specifications 
4.1 Introduction  
Low power D AB/DAB+  repeater shall be designed to amplify one or more DAB  RF frequency 
bloc, the transmit frequency being the same as the receive frequency .  
They should include  filters  to obtain the necessary protection against the users of adjacent 
frequency bands  and to ensure that the low power DAB/DAB+ repeater spurious em issions and 
intermodulation products remains within the limits . The repeater shall operate within the 
frequency bands defined in the Technical interfaces regulations  for In-door low power DAB/DAB+ 
Repeater Band III;  RIR0201- 35 [l.3].  NT-3003  
 
1000 348814  7/15 
 Receive antenna ( located generally outside the building) and transmit antenna (located inside the 
building) gain and directivity  shall be specified by the manufacturer of the low power DAB/DAB+ 
repeater.  
The gain characteristics of this antennal shall be :  
- receive antenna gain shall be equal or higher than +8 dBi.  
- transmit antenna gain shall not exceed + 6 dBi.  
The repeater may  have a gain regulation to enable the correct gain adjustment according the 
received signal strength, the cable attenuation, and the antenna coupling factor(indoor antenna  - 
outdoor antenna).  
The coaxial cable used between receive antenna (outside the building) and the other parts of the 
repeater shall have good shielding effectiveness to avoid any feedback loop (TX to RX via the 
coaxial cable). The shielding effectiveness of this coaxial cable shall be better than 50 dB over 
the operating range of the repeater.    
4.2 Environmental profile 
The technical requirements of the present document apply under the environmental profile for 
operation of the equipment, which shall be declared by the manufacturer of the equipment. The 
equipment shall comply with all the technical requirements of the present document at all times 
when operating within the boundary limits of the declared operational environmental  profile.  
4.3 Nominal DAB RF-test signal  
A nominal DAB RF -test signal according EN 300 401 [2] clause 15.3 for transmission mode I and 
fulfilling the critical mask defined in EN 300  401 [2] clause 15.4 shall be applied to the RX 
antenna port, the level of thi s signal shall be set to produce the nominal TX output power 
(according to manufacturer's declaration) . The frequency of this RF- test signal shall be adjusted 
to the nominal frequency of the bloc -selective repeater under test or the centre frequency of the  
channel selective frequency repeater. For band selective repeater, tests should be carried out on 
the nominal frequency of the lowest frequency DAB bloc within the declared repeater frequency 
band; and repeated on the nominal frequency of the highest freq uency DAB bloc within the 
declared repeater frequency band.   
4.4 Interpretation of the measurement results 
The interpretation of the results recorded in a test report for the measurements described in the 
present document shall be as follows:  
• the measured value compared to the corresponding limit shall be used to decide whether 
an equipment meets the requirements of the present document;  
• the value of the measurement uncertainty for the measurement of each parameter shall 
be included in the test report;  
For the test methods, according to the present document, the measurement uncertainty figures 
shall be calculated in accordance with TR 100 028 [ 3] and shall correspond to an expansion 
factor (coverage factor) k = 1,96 or k = 2 (which provide confidence levels of 95  % respectively  
95,45 % in the case where the distributions characterizing the actual measurement uncertainties 
are normal (Gaussian)).  
The particular expansion factor used for the evaluation of the measurement uncertainty shall be stated.  NT-3003  
 
1000 348814  8/15 
 4.5 Requirements  
4.5.1  Basic rules, EG 200 053  
The basic rules described in the ETSI guide "Radio site engineering for radio equipment and 
systems in the mobile service, EG 200 053" [4] apply to equipment that fall within the scope of 
this document. The rules stated in clause 5. 5 "Repeaters", where installation recommendations 
(clause 5.5.4) are listed are particularly noteworthy. For example these rules are applicable:  
• antenna coupling,  
• maximum gain (which will depend on the antennas coupling loss or isolation),  
• necessary isolation between several systems,  
• the use of filters to obtain the necessary protection against co- located 
radiocommunication equipment,  
• etc. 
Annexe H, "Equipment used to avoid radio frequency problems", will provide useful information 
on the c onnection between several radiocommunication equipment.  
Annexe N, "Radiocommunication in confined spaces", applies particularly to equipment intended 
to be operated in tunnels and confined spaces.  
The design principle, the installation rules, the specific ation calculation described in the  
EG 200 053 are to be considered and taken into account.  
4.5.2  Maximal output radiated power  
4.5.2.1  Definition  
The power of the signal of a T-DAB repeater  is defined as the long- term average of the time -
varying short -term signal power. An appropriate instrument for T-DAB power measurements is a 
thermal power meter.  
The maximum  output power is the power that the transmitter deliver s at its TX antenna port or, for 
devices without a permanent 50 Ohm or 75 Ohm TX antenna connector, radiated by the TX 
antenna, under following conditions of operation:  
• nominal supply voltage 
• set to maximum gain  
• highest applicable signal at RX antenna port  
 
4.5.2.2  Limit  
The m aximal out put radiated power  shall not exceed 50 µW (-13 dBm) erp . The maximum 
declared TX antenna gain is taken into account to determine the effective radiated p ower  of the 
repeater fitted with permanent TX antenna connector .  
4.5.2.3  Conformance  
Conformance tests as defined in clause 5. 1.1 of this document shall be carried out.  
4.5.3  Intermodulation products  
4.5.3.1  Definition  
For the purposes of the present document intermodulation products are emissions at frequencies 
within  the repeater's operating band .  
Intermodulation products are emissions  generated in non- linear elements of the repeater, in the 
presence of several RF input signals . NT-3003  
 
1000 348814  9/15 
 4.5.3.2  Limit  
Intermodulation products in shall not exceed - 54 dBm erp measured  at the TX -antenna port .  
For repeater fitted with permanent TX antenna connector, the maximum declared TX antenna 
gain is taken into account to determine the effective radiated power of intermodulation products.  
4.5.3.3  Conformance  
Conformance tests as defined in clause 5. 1.2 of this document shall be carried out.  
4.5.4  Spurious emissions   
4.5.4.1  Definition  
In case of equipment fitted with permanent TX antenna connector, the maximum declared TX antenna gain is taken into account to determine the effective power of the spurious emissions of 
the repeater.  
4.5.4.2  Limit  
Effective radiated power of s purious emissions  and cabinet radiation in the frequency range  
30 M Hz to 1 GHz  (radiated) and 9 kHz to 1 GHz (conducted) shall not exceed - 68 dBm erp 
measured with a receiver bandwidth of 100 kHz . This limit applies to frequencies outsi de the 
range  f
0 ± 3 MHz, where f0 is the centre frequency of the RF-test signal or RF CW signal used , 
irrespective of the number of carriers employed.  
4.5.4.3  Conformance  
Conformance tests as defined in clause 5.1. 3 of this document shall be carried out.  
4.5.5  Repeater gain 
4.5.5.1  Definition  
Gain of the repeater is defined as total gain of the equipment, including receive and transmit 
antennas, filters, cables and amplifiers. In case of equipment fitted with permanent RX and/or TX 
antenna connector, the maximum declared RX and TX antenna gain is taken into account to 
determine the gain of the  repeater . 
The maximum in- band gain has been set to a value that limits the risk of self oscillation due to 
feedback loop over the air between transmit antenna and receive antenna.  
The out of band gain of DAB repeater has been set to prevent other applications to be  disturbed 
by DAB repeaters. Neighbours applications like Paging base stations, PMR, … should not  
produce or suffer of any unnecessary disturbance due to the proximity of a DAB repeater.   
4.5.5.2  Maximum in -band gain 
4.5.5.3  Limits  
The in -band gain of the repeater equipment  shall not exceed 44 dB. 
4.5.5.4  Conformance  
Conformance tests as defined in clause 5.1.4  of this document shall be carried out.  
 NT-3003  
 
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 4.5.5.5  Out of band gain  
4.5.5.6  Limits  
The out of band gain of the repeater equipment shall not exceed the limits below  in table 1 and 
table 2:  
Table 1: Frequency dependant gain limits  
Frequency  Maximum Gain  
< FL - 8 MHz  0 dB 
FL - 8 MHz to FL - 2 MHz  10 dB  
FL - 2 MHz  to FL the in -band gain limit applies  
FH to FH + 2 MHz  the in -band gain limit applies  
FH + 2 MHz  to FH + 8 MHz  10 dB  
> FH + 8 MHz  0 dB 
 
where FL and F H are: 
- in case of bloc selective repeater, the lower frequency ( FL) and upper frequency ( FH) of the 
repeater DAB bloc;  
- in case of channel selective repeater, the lower frequency of the lowest DAB bloc contained into 
the channel ( FL) and upper frequency of the highest DAB bloc contained into the channel ( FH); 
- in case of band selective repeater, the lower frequency of the lowest DAB bloc contained into 
the defined repeater band ( FL) and upper frequency of the highest DAB bloc contained into the 
defined repeater band (FH). 
 
Table 2: Fixed frequency limits  
 Frequency  Maximum Gain  
242.500 MHz to 243.500 MHz   0 dB 
 
4.5.5.7  Conformance  
Conformance tests as defined in clause 5. 1.5 of this document shall be carried out.  
5 Testing for compliance with technical requirements  
5.1 Essential radio test suites  
Essential test suites are referred to in annex III of TIO [l.2] (or annex III of R&TTE Direct ive [i.1]).  
The following essential test suites shall be used to assess the performance of equipment.  
5.1.1  Maximal output radiated power  
The repeater shall be set to maximum gain. A nominal  DAB RF -test signal according clause 4.3 
of this document shall be applied to the RX antenna port, the level of this signal shall be 
increased by 10 dB. The frequency of this RF- test signal shall correspond to the nominal 
frequency of the bloc -selective repeater under test  or the centre frequency of the channel 
selective frequency repeater . For band selective repeater, tests should be carried out on the 
nominal frequency of the lowest frequency DAB bloc within the declared repeater frequency NT-3003  
 
1000 348814  11/15 
 band; and repeated on the nominal frequency of the highest frequency DAB bloc within the 
declared repeater frequency band.  
(Alternatively, a RF CW signal may be applied. The level of this RF CW signal shall be adjusted 10 dB higher than the one producing the nominal TX output power , the frequency being the same 
as described above for the DAB RF -test signal ). 
The maximal output radiated power is measured at the TX antenna  port of the repeater.  
5.1.2  Intermodulation products   
This test shall be used to verify that the level of intermodulation  products, generated in non- linear 
elements of the repeater, in the presence of several RF input signals, do not exceed the specified limits.  
The measurements shall be performed on TX antenna port of the repeater.   
The repeater shall be set to maximum gain. Two continuous sinusoidal RF signals shall be fed to 
the input antenna port of the repeater using a combining device.  
5.1.2.1  In band stimulus signals  
The frequencies of both RF signals shall be within the repeater's operating band. The spacing between both RF s ignals shall be lower than a DAB bloc (e.g. 400 kHz ). The input signals and 
resulting third order product shall be within the declared operational frequency band of the 
repeater . 
The level of both RF input signals shall be increased simultaneously, until t he maximum rated 
output power, as declared by the manufacturer, is reached.  
The level of the intermodulation products shall be measured by means of a selective 
measurement device presenting to the repeater a load with an impedance of 50 Ω. 
The test shall be repeated with both RF input signals increased by 10 dB each.  
NOTE:  In this case, the automatic gain (level) control may reduce the gain to a value less than 
maximum gain in order to keep the maximum rated output power per channel, as declared by 
the manufacturer.  
An average power measurement (RMS detector) shall be performed using a bandwidth of 100 
kHz. 
5.1.2.2  Out of  band stimulus signals  
The frequencies of both RF signals shall be outside the repeater's operating band. The first signal 
has to be adjusted to 169.500 MHz, the second one being adjusted to ( 2 x 169.500 MHz ) - FC;  
FC is the cent re frequency of the lowest DAB bloc contained into the defined repeater band.  The 
resulting third order product shall be within the declared operational frequency band of the 
repeater.  
The level of both RF input signals shall be set to - 20 dBm . 
The level of the third order intermodulation products shall be measured by means of a selective measurement device (e.g. spectrum analyser)  presenting to the repeater a load with an 
impedance of 50 Ω. 
 
5.1.3  Spurious emission  
This test shall be used to verify that the level of spurious emissions  (measured at TX -antenna 
port as well as cabinet radiation) in the presence of RF input signal do not ex ceed the specified 
limits.   
Spurious emission between 30 MHz and 1 GHz shall be tested. The measurements shall be 
performed on TX antenna port of the repeater where the maximum declared TX antenna gain is NT-3003  
 
1000 348814  12/15 
 taken into account to determine the effective power  of the spurious emissions of the repeater   
and also the cabinet radiation shall be measured.  
The repeater shall be set to maximum gain. A nominal DAB RF- test signal according clause 4.3 
of this document shall be applied to the RX antenna port. The frequency of this RF -test signal 
shall correspond to the nominal frequency of the bloc -selective repeater under test or the centre 
frequency of the channel selective frequency repeater. For band selective repeater, tests should 
be carried out on the nominal frequency of the lowest frequency DAB bloc within the declared 
repeater frequency band; and repeated on the nominal frequency of the highest frequency DAB 
bloc within the declared repeater frequency band.  
(Alternatively, a RF CW signal may be applied. The level  of this RF CW signal shall be adjusted 
to produc e the nominal TX output power).   
An average power measurement (RMS detector) shall be performed using a bandwidth of 100 
kHz . 
5.1.4  Maximum in -band gain 
To test the net gain of the repeater inside  the declared transmit frequency band.  
1) The repeater shall be set to maximum gain.  
2) A continuous sinusoidal RF signal shall be fed into the RX -antenna input port of the repeater.  
3) The frequency should be : 
- the nominal frequency of the bloc -selecti ve repeater under test or  
- the centre frequency of the channel selective frequency repeater or  
- the nominal frequency of the lowest frequency DAB bloc within the declared repeater frequency 
band and repeated on the nominal frequency of the highest frequency DAB bloc within the 
declared repeater frequency band of the band selective repeater.  
4) The power level of the RF input signal shall be at least 5 dB below the power level which would 
produce, when applied within the pass band, maximum rated output power, as declared by the 
manufacturer. This is to ensure that the equipment is operating in the linear output range.  
3) The average output power in each case shall be measured and the net gain shall be recorded.  
The results obtained shall be compared to the limits in clause 4. 5.5.3  in order to prove 
compliance.  
5.1.5  Maximum out -of-band gain  
To test the net gain of the repeater outside the declared transmit frequency band.  
1) The repeater shall be set to maximum gain.  
2) A continuous sinusoidal RF signal shall be fed successively at frequency offsets Y from 
the edges of the relevant transmit frequency band F L or FH (according clause 4.5.5.6 of the 
present document) into the RX -antenna input port of the repeater .  
The frequ ency offsets Y shall have the following values:  
- 2 MHz;  
- 8 MHz;  
- 16 MHz:  
- 32 MHz   NT-3003  
 
1000 348814  13/15 
 The power level of the RF input signal shall be at least 5 dB below the power level which would 
produce, when applied within the pass band, maximum rated output power, as  declared by the 
manufacturer. This is to ensure that the equipment is operating in the linear output range.  
3) The test shall be repeated at  
- 242.500 MHz;  
- 243.000 MHz  and  
- 243.500 MHz  
with the power level of the RF input signal as defined in point 2) above.  
4) The average output power in each case shall be measured and the net gain shall be 
recorded.  
The results obtained shall be compared to the limits in clause 4.5.5.6  in order to prove 
compliance.  
 
 
6 Repealed documents  
- 
Biel/Bienne, 31.12.2013  
BUNDESAMT FÜR KOMMUNIKATION  
OFFICE FEDERAL DE LA COMMUNICATION  
UFFICIO FEDERALE DELLE COMUNICAZIONI  
FEDERAL OFFICE OF COMMUNICATIONS  
Der Direktor / Le Directeur / Il Direttore / The Director General:  
Dr. Martin Dumermuth 
  NT-3003  
 
1000 348814  14/15 
 Annex A (normative):  
Requirements  and conformance test specifications table  
The Requirements and conformance Test specifications Table (RTT) in table A.1 serves a 
number of purposes, as follows:  
• it provides a statement of all the essential requirements in words and by cross reference to ( a) 
specific clause(s) in the present document or to (a) specific clause(s) in (a) specific referenced document(s);  
• it provides a statement of all the test procedures corresponding to those essential 
requirements by cross reference to (a) specific clause(s)  in the present document or to (a) 
specific clause(s) in (a) specific referenced document(s);  
• it qualifies each requirement to be either:  
- Unconditional: meaning that the requirement applies in all circumstances; or  
- Conditional: meaning that the requirement is dependent on the manufacturer having chosen 
to support optional functionality defined within the schedule;  
• in the case of Conditional requirements, it associates the requirement with the particular 
optional service or functionality;  
• it quali fies each test procedure to be either:  
- Essential: meaning that it is included with the Essential Radio Test Suite and therefore the 
requirement shall be demonstrated to be met in accordance with the referenced procedures;  
- Other: meaning that the test p rocedure is illustrative but other means of demonstrating 
compliance with the requirement are permitted.  
Table A.1: Requirements and conformance Test specifications Table (RTT)  
The following requirements and test specifications are relevant to the presumpt ion of conformity 
under the article 7 paragraph 3 TIO (Ordinance on Telecommunications Installations [l.2])  
Requirement  Requirement Conditionality  Test Specification  
No Description  Reference: 
Clause No  U/C Condition  E/O Reference:  
Clause No  
1 Maximum output 
radiated power.  4.5.2 U  E 5.1.1  
2 TX intermodulation 
products.  4.5.3 U  E 5.1.2  
3 Spurious emissions  4.5.4 U  E 5.1.3  
4 Maximum in -band gain.  4.5.5.2 U  E 5.1.4  
5 Out of band gain.  4.5.5.5  U  E 5.1.5  
 
Key to columns:  
Requirement:  
No A unique identifier for one row of the table which may be used to identify a 
requirement or its test specification.  
Description  A textual reference to the requirement.  NT-3003  
 
1000 348814  15/15 
 Clause Number  Identification of clause(s) defining the requirement in the present document 
unless  another document is referenced explicitly.  
Requirement Conditionality:  
U/C Indicates whether the requirement is to be unconditionally  applicable (U) or is 
conditional  upon the manufacturers claimed functionality of the equipment 
(C). 
Condition  Explains th e conditions when the requirement shall or shall not be applicable 
for a technical requirement which is classified "conditional".  
Test Specification:  
E/O Indicates whether the test specification forms part of the Essential Radio 
Test Suite (E) or whether it is one of the Other Test Suite (O).  
NOTE:  All tests whether "E" or "O" are relevant to the requirements. Rows designated "E" collectively 
make up the Essential Radio Test Suite; those designated "O" make up the Other Test Suite; 
for those designated "X"  there is no test specified corresponding to the requirement. The 
completion of all tests classified "E" as specified with satisfactory outcomes is a necessary 
condition for a presumption of conformity. Compliance with requirements associated with tests 
classified "O" or "X" is a necessary condition for presumption of conformity, although 
conformance with the requirement may be claimed by an equivalent test or by manufacturer's 
assertion supported by appropriate entries in the technical construction file.  
Clause Number  Identification of clause(s) defining the test specification in the present 
document unless another document is referenced explicitly. Where no test is specified (that is, where the previous field is "X") this field remains blank.