EN 61079-3:1993

Methods of measurement on receivers for satellite broadcast transmissions in the 12 GHz band - Part 3: Electrical measurements of overall performance of receiver systems comprising an outdoor unit and a DBS tuner unit

Applies to the conditions and methods of measurement of overall performance of receiver systems comprising an outdoor unit and a DBS tuner unit for direct reception of satellite broadcast transmissions in the 12 GHz band.

Meßverfahren für Empfänger für Satelliten-Rundfunkübertragung im 12-GHz-Bereich - Teil 3: Elektrische Meßverfahren der Gesamteigenschaften von Empfangsanlagen aus Außeneinheit und Satellitenempfänger für direkten Satellitenempfang

Méthodes de mesure sur les récepteurs d'émissions de radiodiffusion par satellite dans la bande 12 GHz - Partie 3: Mesures électriques des performances globales des systèmes de réception constitués d'une unité extérieure et d'un syntoniseur pour la radiodiffusion directe par satellite

S'applique aux conditions et méthodes de mesures des perfomances globales de systèmes de réception constitués d'une unité extérieure et d'un syntoniseur pour la radiodiffusion directe par satellite dans la bande des 12 GHz.

Methods of measurement on receivers for satellite broadcast transmissions in the 12 GHz band -- Part 3: Electrical measurements of overall performance of receiver systems comprising an outdoor unit and a DBS tuner unit (IEC 61079-3:1993)

General Information

• Status: Published
• Publication Date: 25-May-1993
• Withdrawal Date: 31-Mar-1994
• ICS: 33.060.20 - Receiving and transmitting equipment
• Technical Committee: CLC/TC 100X - Audio, video and multimedia systems and equipment and related sub-systems
• Drafting Committee: IEC/TC 100 - IEC_TC_100
• Parallel Committee: IEC/TC 100 - IEC_TC_100
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 26-May-1993
• Completion Date: 26-May-1993
• Ref Project: SIST EN 61079-3:1999 - Methods of measurement on receivers for satellite broadcast transmissions in the 12 GHz band -- Part 3: Electrical measurements of overall performance of receiver systems comprising an outdoor unit and a DBS tuner unit

Overview

EN 61079-3:1993 (IEC 61079-3:1993) specifies methods for electrical measurements of overall performance of satellite receiver systems composed of an outdoor unit and a DBS tuner unit for direct reception in the 12 GHz band. It defines test conditions and procedures (but not pass/fail limits) for channels referenced to WARC BS‑77 / RARC SAT‑83 and systems per CCIR Recommendation 650. The standard is intended to measure performance items that cannot be derived from testing the outdoor unit or tuner separately.

Key topics and requirements

• Scope and setup
  • Tests apply to a combined outdoor unit + DBS tuner using the manufacturer‑specified cable (maximum length of stated range).
  • Measurements must be performed in an RF‑quiet environment (or screened room) with controlled environmental and power‑supply conditions (voltage/frequency fluctuations ±2%, supply harmonics ≤5%).
• Test signals and reference conditions
  • Baseband video, audio and digital test signals per system (Digital sub‑carrier/NTSC, B‑MAC, C‑/D‑/D2‑MAC).
  • RF input may be applied via direct feed to the SHF converter or by radiating to the receiving antenna; input levels expressed as dB(mW) (direct) or dB(W/m2) (radiated).
  • Standard measuring conditions (e.g., audio off, digital sub‑carrier off unless specified).
• Measurement methods (Section 4)
  • Sensitivity - video S/N vs input level (direct: −90 to −70 dB(mW) in 2 dB steps; radiated: −114 to −94 dB(W/m2) in 2 dB steps).
  • Truncation noise - subjective picture (and sound for digital sub‑carrier/NTSC) assessment using pulse tests.
  • Spurious response
  • Differential gain and phase relative to chrominance sub‑carrier
  • Suppression of energy dispersal signal
  • Bit error rate vs input signal level
• Instruments and requirements
  • Test signal generator, RF modulator (carrier-to-noise >30 dB at −40 dB(mW)), CW generator, band/low‑pass filters, video noise meter, picture monitor.
• Scope limitations
  • The standard describes measurement methods only; normative limit values are outside its scope. Decoder measurements are covered in IEC 1079 Parts 4 and 5.

Applications and users

• Manufacturers and R&D teams - validation of receiver system design and combined‑unit interactions.
• Test laboratories and certification bodies - repeatable procedures for performance characterization and comparative testing.
• Field engineers and installers - guidance for on‑site verification of overall receiver performance and troubleshooting of combined outdoor + tuner setups.
• Product compliance and QA - factory acceptance testing and documentation of sensitivity, BER, and picture/audio quality metrics.

Related standards

• IEC 1079‑1 / EN 61079‑1 - RF measurements on outdoor units (12 GHz)
• IEC 1079‑2 / EN 61079‑2 - Electrical measurements on DBS tuner units
• IEC 1079‑4 / 1079‑5 - Decoder unit measurements (MAC and NTSC/data)
• IEC 107‑1 - General recommended methods for TV receiver electrical measurements

Keywords: EN 61079-3:1993, IEC 61079-3, 12 GHz band, satellite receiver measurements, DBS tuner, outdoor unit, sensitivity, bit error rate, truncation noise, spurious response, receiver system testing.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-1999
Methods of measurement on receivers for satellite broadcast transmissions in the
12 GHz band -- Part 3: Electrical measurements of overall performance of receiver
systems comprising an outdoor unit and a DBS tuner unit (IEC 61079-3:1993)
Methods of measurement on receivers for satellite broadcast transmissions in the 12
GHz band -- Part 3: Electrical measurements of overall performance of receiver systems
comprising an outdoor unit and a DBS tuner unit
Meßverfahren für Empfänger für Satelliten-Rundfunkübertragung im 12-GHz-Bereich --
Teil 3: Elektrische Meßverfahren der Gesamteigenschaften von Empfangsanlagen aus
Außeneinheit und Satellitenempfänger für direkten Satellitenempfang
Méthodes de mesure sur les récepteurs d'émissions de radiodiffusion par satellite dans
la bande 12 GHz -- Partie 3: Mesures électriques des performances globales des
systèmes de réception constitués d'une unité extérieure et d'un syntoniseur pour la
radiodiffusion directe par satellite
Ta slovenski standard je istoveten z: EN 61079-3:1993
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME CEI
INTERNATIONALE IEC
61079-3
INTERNATIONAL
Première édition
STAN DARD
First edition
1993-04
Méthodes de mesure sur les récepteurs
d'émissions de radiodiffusion par satellite
dans la bande 12 GHz
Partie 3:
Mesures électriques des performances globales
des systèmes de réception constitués d'une
unité extérieure et d'un syntoniseur pour
la radiodiffusion directe par satellite
Methods of measurement on receivers for
satellite broadcast transmissions in
the 12
GHz band
Part 3:
Electrical measurements of overall performance
of receiver systems comprising an outdoor unit
and a DBS tuner unit
© IEC 1993 Droits de reproduction réservés
— Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun any form or by any means, electronic or mechanical,
procédé, électronique ou mécanique, y compris la photo- including photocopying and microfilm, without permission in
copie et les microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
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1079-3©IEC:1993 — 3 —
CONTENTS
Page
FOREWORD 5
Clause
Section 1: General
1.1 Scope 9
1.2 Normative references 9
Section 2: General explanation of terms
2.1 Outdoor unit 11
2.2 DBS tuner unit 11
Section 3: General notes on measurements
3.1 General conditions 11
3.2 Video, audio and digital test signals 13
3.3 Radio-frequency input signals 13
3.4 Reference signals 15
3.5 Standard measuring conditions 17
3.6 Measuring instruments 17
Section 4: Methods of measurement
4.1 Sensitivity 19
4.2 Truncation noise 21
4.3 Spurious response 23
4.4 Differential gain and differential phase characteristics with
respect to the chrominance sub-carrier 25
4.5 Suppression of energy dispersal signal 27
4.6 Bit error rate versus input signal level 29
Table and figures 31
Annex A — Bibliography 45
1079-3 40 IEC: 1993 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
METHODS OF MEASUREMENT ON RECEIVERS
FOR SATELLITE BROADCAST TRANSMISSIONS
IN THE 12 GHz BAND
Part 3: Electrical measurements
of overall performance of receiver systems
comprising an outdoor unit and
a DBS tuner unit
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
comprising all national electrotechnical committees Committees). The object of the IEC is to
(IEC National
promote international cooperation on all questions concerning standardization in the electrical and
electronic fields. To this end and in addition to other activities, the IEC publishes International Standards.
Their preparation is entrusted to Technical Committees; any IEC National Committee interested in
and
the subject dealt with may participate in this preparatory work. International, governmental
non-governmental organizations liaising with the IEC also participate in this preparation. The IEC
collaborates closely with the International Organization for Standardization (ISO) in accordance with
conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of the IEC on technical matters, prepared by Technical Committees on
which all the National Committees having a special interest therein are represented, express, as nearly as
possible, an international consensus of opinion on the subjects dealt with.
3) They have the form of recommendations for international use published in the form of Standards, Technical
Reports or Guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
International Standard IEC 1079-3 has been prepared by sub-committee 12A: Receiving
equipment, of IEC technical committee 12: Radiocommunications.
The text of this standard is based on the following documents:
DIS Report on Voting
12A(CO)151 and 151A 12A(CO)166
Full information on the voting for the approval of this standard can be found in the repo rt
on voting indicated in the above table.

1079-3 ©IEC: 1993 - 7 -
IEC 1079 consists of the following parts, under the general title: Methods of measurement
on receivers for satellite broadcast transmissions in the 12 GHz band
- Part 1: Radio frequency measurements on outdoor units for channels in the 12 GHz
band
-
Part 2: Electrical measurements on DBS tuner units
- Part 3: Electrical measurements of overall performance of receiver systems
comprising an outdoor unit and a DBS tuner unit
- Part 4: Electrical measurements on sound/data decoder units for the digital subcarrier
NTSC system
- Part 5: Electrical measurements on decoder units for MAC/Paquet systems.
Annex A is for information only.

1079-3 © I EC: 1993 - 9 -
METHODS OF MEASUREMENT ON RECEIVERS
FOR SATELLITE BROADCAST TRANSMISSIONS
IN THE 12 GHz BAND
Part 3: Electrical measurements
of overall performance of receiver systems
comprising an outdoor unit and
a DBS tuner unit
Section 1: General
1.1 Scope
This part of IEC 1079 applies to the conditions and methods of measurement of overall
performance of receiver systems comprising an outdoor unit and a DBS tuner unit for
direct reception of satellite broadcast transmissions in the 12 GHz band. The channels are
those defined by WARC BS-77 and RARC SAT-83 and the systems those of CCIR
Recommendation 650 [1]•.
The specifications of the limit values of the various parameters of the receiver systems are
outside the scope of this standard.
Although individual pe rformance of an outdoor unit and a DBS tuner unit can be measured
by the methods defined by pa rts 1 and 2 of IEC 1079, measurements of overall
performance of a receiver system consisting of an indoor unit and a DBS tuner unit are
also necessary for individual receiver installations.
A decoder for baseband and data signals may be included in the receiver. Methods of
measurement of the decoder, however, are described in pa rts 4 and 5 of IEC 1079.
NOTE - Measurement items for overall pe rformance are confined to those which cannot be obtained by
the measurements of each individual unit or may be affected by the combination of the units in the
receiver.
1.2 Normative references
The following normative documents contain provisions which, through reference in this
text, constitute provisions of this part of IEC 1079. At the time of publication, the editions
indicated were valid. All normative documents are subject to revision, and the pa rties to
agreeement based on this part of IEC 1079 are encouraged to investigate the possibility of
applying the most recent editions of the normative documents listed below. Members of
ISO and IEC maintain registers of currently valid International Standards.
IEC 107-1: 1977, Recommended methods of measurement on receivers for television
broadcast transmissions - Part 1: General considerations - Electrical measurements other
than those at audio-frequencies
• The figures in square brackets refer to the bibliography (annex A).

1079-3 © IEC: 1993 - 11 -
IEC 569: 1977,
Informative guide for subjective tests on television receivers
IEC 1079-1: 1992,
Methods of measurement on receivers for satellite broadcast
transmissions in the 12 GHz
band - Part 1: Radio frequency measurements on outdoor
units for channels in the 12 GHz band
IEC 1079-2: 1992,
Methods of measurement on receivers for satellite broadcast
transmissions in the 12 GHz band - Part
2: Electrical measurements on DBS tuner units
Section 2: General explanation of terms
The following general definitions apply for the purpose of this standard.
2.1 Outdoor unit
See part 1, 1.3.
2.2 DBS tuner unit
See part 2, 1.3.1.
Section 3: General notes on measurements
3.1 General conditions
3.1.1 Introduction
Measurements shall be carried out in accordance with the following conditions to ensure
consistent results.
NOTE - The methods described here assume the use of the following transmission systems:
Digital sub-carrier/NTSC,
B-MAC,
C-MAC/packet, D-MAC/packet and D2-MAC/packet.
Information pertaining to these systems may be found in the references listed in annex A.
3.1.2
Set up of receiver
An outdoor unit and a DBS tuner unit shall be connected together, using the cable
specified by the manufacturer of the receiver. Its length shall be the maximum of the
specified range.
1079-3 © I EC: 1993 –13 –
3.1.3 Testing site
Measurements shall be carried out at a location that is not subject to external radio
frequency interference. If interference cannot be avoided, the measurements shall be
carried out in a screened room.
3.1.4 Environmental conditions
Sections three, four and five of IEC 107-1 shall be applied.
3.1.5 Power supply
A power supply equivalent to the rated voltage and rated frequency of the receiver shall
be used. The fluctuation of the power supply voltage and frequency during the tests shall
not exceed ± 2 % and harmonic components of the power supply shall not exceed 5 %.
3.1.6 Accuracy of measuring instruments
Requirements for the accuracy of measurements are not included in this standard,
because they depend only on the purpose for which the measurements are required.
The accuracy of the measuring instruments used, if known, shall either be stated as a
percentage or in decibels as appropriate. Alternatively the precision class may be quoted
as stated in the relevant publications (under consideration).
3.1.7 Stabilization period
Unless otherwise specified, measurements shall be started at the time that stabilization of
the characteristics is obtained.
3.2 Video, audio and digital test signals
See part 2, clause 2.2.
3.3 Radio-frequency input signals
3.3.1 Input signals
The following radio-frequency input signals shall be used:
a) unmodulated carrier signal;
b) carrier signals modulated by the test signals for the system in use.
Unless otherwise specified, the carrier frequencies shall be selected from the nominal
frequencies of the satellite broadcast channels, as specified by the standards of the
country or countries for which the equipment under test was designed.

1079-3 ©IEC: 1993 - 15 -
3.3.2
Radio-frequency input arrangement
Depending on the input facilities of the equipment under test, the radio-frequency input
signal can be applied in the following way:
a) direct signal input to the SHF converter by means of a waveguide or a coaxial
cable;
b) radiated signal input to the receiving antenna by means of a transmitting antenna.
(For detail, see part 1, 2.2.4.)
3.3.3 Input signal level
In the case of direct signal input to the SHF converter, the input signal level shall be
expressed in terms of available power dB (mW) at the output of the signal generator,
including its associated network.
In the case of radiated signal input, the input signal level shall be expressed in terms of
power flux density dB (W/m 2) at the aperture plane of the receiving antenna.
(For detail, see part 1, 2.2.5.)
3.3.4 Setting of input signal level
Input signal levels shall be specified for unmodulated carriers, even when modulated
carriers are used. The level setting can be made with a spectrum analyser.
3.4 Reference signals
3.4.1 Reference video signal
For the measurements of noise and interference, a composite sine-wave signal specified
in 2.2.1 of part 2 shall be used. Its sine-wave frequency is set at the frequency (f 0) shown
in table 1.
The frequency (f0) corresponds to the 0 dB crossover frequency of the pre-emphasis
network.
3.4.2 Reference audio signal
a) Digital sub-carrier/NTSC system
A 1 kHz sine-wave signal at a level corresponding to full scale minus 18 dB in digital
coding shall be used.
MAC systems
b)
A data burst carrying a pseudorandom binary sequence shall be used.

1079-3 © I EC: 1993 - 17 -
3.5 Standard measuring conditions
Unless otherwise specified, the following conditions apply:
a) Audio input signal: none
b) Digital sub-carrier in the Digital sub-carrier/NTSC system: off
Energy dispersal signal: none
c)
d) MAC system data burst: present
The data burst includes sync information.
The input signal is applied to the outdoor unit by the arrangement specified in 3.3.2 and
the video output signal is measured through a low-pass filter specified in 3.6.
3.6 Measuring Instruments
3.6.1 Test signal generator
The test generator shall be capable of providing baseband video signals as specified
in 3.2. For Digital sub-carrier/NTSC signals, a suitably modulated sub-carrier shall also be
included. For MAC test signals, when data burst is included, it shall include line syn-
chronization and a pseudo random binary sequence.
3.6.2 RF modulator
RF modulator shall be capable of frequency modulating the carrier of each broadcast
The
channel in the 12 GHz band with the baseband signal provided by the test signal
generator in accordance with the system tested. It should have a maximum output level
of -40 dB (mW) or more and provide an on/off switch for an energy dispersal signal.
Notion
...