iTeh StandardsiTeh Standards
EURUSD
Your shopping cart is empty.
CLC

HD 477.3.4 S1:1989

(Main)

Methods of measurement of equipment used in terrestrial radio-relay systems - Part 3: Simulated systems - Section 4: Measurements for f.d.m. transmission

Methods of measurement of equipment used in terrestrial radio-relay systems - Part 3: Simulated systems - Section 4: Measurements for f.d.m. transmission

Deals with baseband-to-baseband measurements of the noise performance of simulated radio-relay systems used for frequency division multiplex telephony. These measurements are additional to those already given in Part 3, Section Three of HD 477.3.3

Meßverfahren für Geräte in terrestrischen Richtfunksystemen - Teil 3: Simulierte Systeme - Hauptabschnitt 4: Messungen bei Frequenzmultiplex-Übertragung

Méthodes de mesure applicables au matériel utilisé dans les faisceaux hertziens terrestres - Partie 3: Liaisons simulées - Section 4: Mesures pour la transmission de la téléphonie multivoie à m.r.f.

Traite de mesures pour la transmission de la téléphonie multivoie à multiplexage par répartition en fréquence (m.r.f.). Les mesures sont effectuées de bande de base à bande de base au moyen d'un signal modulant à spectre continu uniforme. Leur but est la détermination de la qualité de transmission d'une liaison simulée. Ces mesures sont complémentaires à celles déjà décrites dans la HD 477.3.3, section trois.

Methods of measurement of equipment used in terrestrial radio-relay systems - Part 3: Simulated systems - Section 4: Measurements for f.d.m. transmission

General Information

Status
Withdrawn
Publication Date
05-Sep-1989
Withdrawal Date
30-Sep-1989
ICS
33.060.30 - Radio relay and fixed satellite communications systems
Technical Committee
CLC/SR 102 - Equipment used in radio communications for mobile services and satellite communication systems
Drafting Committee
IEC/TC 102 - IEC_TC_102
Parallel Committee
IEC/TC 102 - IEC_TC_102
Current Stage
9960 - Withdrawal effective - Withdrawal
Completion Date
14-Dec-2022
Ref Project
SIST HD 477.3.4 S1:2002 - Methods of measurement of equipment used in terrestrial radio-relay systems -- Part 3: Simulated systems -- Section 4: Measurements for f.d.m. transmission

Buy Standard

HD 477.3.4 S1:2002HD 477.3.4 S1:2002
PreviousNext
Standardization document
HD 477.3.4 S1:2002
English language
16 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (Sample)


SLOVENSKI SIST HD 477.3.4 S1:2002
prva izdaja
STANDARD
oktober 2002
Methods of measurement of equipment used in terrestrial radio-relay systems - Part
3: Simulated systems - Section 4: Measurements for f.d.m. transmission
ICS 33.060.30 Referen
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

This May Also Interest You

CLC
CWA 45546-1:2004(Main)
Guidelines to standardisers of Collective Transport Systems - Needs of older people and persons with disabilities - Part 1: Basic Guidelines
SIST EN 60728-1-1:2014

IEC 60728-1-1:2014 is applicable to RF cabling for two-way home networks with wired cords or wireless links inside a room and primarily intended for television and sound signals operating between about 5 MHz and 3 000 MHz. The frequency range is extended to 6 000 MHz for distribution techniques that replace wired cords with a wireless two-way communication. This second edition cancels and replaces the first edition published in 2010, and constitutes a technical revision. It includes the following changes: update of performance requirements in Clause 5 to include those for DVB-T2 signals.

  • Standard
    65 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN 50494:2007(Main)
Satellite signal distribution over a single coaxial cable in single dwelling installations
SIST EN 50494:2008

This European Standard describes: – the system physical structure; – the system control signals, which implement an extension of the DiSEqC set of commands described in the DiSEqC bus functional specification; – the definition of identified configurations; – management of the potential collisions in the control signals traffic.

  • Standard
    30 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN 50478:2007(Main)
Functional receiver specification of satellite digital interactive television with a low data rate return channel via satellite - Modem layer specification
SIST EN 50478:2007

This standard applies for the interaction channel for interactive television networks using Geostationary Satellites with fixed return channel satellite terminals via low data rate dedicated return link. It specifies the essential elements for the implementation of the interaction channel.

  • Standard
    114 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN 61319-1:1996/A11:1999(Amendment)
Interconnections of satellite receiving equipment - Part 1: Europe
SIST EN 61319-1:1999/A11:2003

Initially handled by TC 206 (disbanded) * D141/C101: Transferred to new TC 100X
2021: CLC legacy converted by DCLab NISOSTS

  • Amendment
    18 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN 61319-1:1996(Main)
Interconnections of satellite receiving equipment - Part 1: Europe
SIST EN 61319-1:1999

Deals with the standardization of interconnections and matching values for satellite receivers for individual television and sound radio broadcast reception in the 10,70 GHz to 12,75 GHz band.

  • Standard
    27 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 60335-2-39:2024(Main)
Household and similar electrical appliances - Safety - Part 2-39: Particular requirements for commercial electric multi-purpose cooking pans
kSIST FprEN 60335-2-39:2012

IEC 60335-2-39:2012 deals with the safety of electrically operated commercial multi-purpose cooking pans not intended for household and similar use, their rated voltage being not more than 250 V for single-phase appliances connected between one phase and neutral and 480 V for other appliances. This standard also deals with pressurized appliances and appliances with pressurized parts. These appliances are used for processing food for commercial consumption, for example in kitchens of restaurants, canteens, hospitals and in commercial enterprises such as bakeries, butcheries, etc. The electrical part of appliances making use of other forms of energy is also within the scope of this standard. As far as is practicable, this standard deals with the common hazards presented by these types of appliances. Attention is drawn to the fact that for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements may be necessary. The principal changes in this edition as compared with the fifth edition of IEC 60335-2-39 are as follows (minor changes are not listed): - addition to definition of portable appliances, atmospheric multi-purpose cooking and rated pressure; - deletion of equipotential symbol 5021 of IEC 60417 covered by Part 1; - addition of instructions for multi-purpose cooking pans; - modification on leakage current permissible for portable class l appliances; - addition to abnormal test requirements; - addition to mechanical hazard test for multi-purpose cooking pans; - addition of construction test for multi-purpose cooking pans; - addition to construction requirements for lids and theirs grips; - addition to construction requirements for positioning of pressure reliefs; - addition to construction's fixed appliances which are moved forward and backward for cleaning purposes.
The attention of National Committees is drawn to the fact that equipment manufacturers and testing organizations may need a transitional period following publication of a new, amended or revised IEC publication in which to make products in accordance with the new requirements and to equip themselves for conducting new or revised tests. It is the recommendation of the committee that the content of this publication be adopted for implementation nationally not earlier than 12 months or later than 36 months from the date of publication. Keywords: Multi-purpose cooking pans.

  • Draft
    21 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 60034-9:2024(Main)
Rotating electrical machines - Part 9: Noise limits
SIST EN IEC 60034-9:2025

IEC 60034-9:2021 specifies test methods for the determination of sound power level of rotating electrical machines and specifies maximum A-weighted sound power levels for factory acceptance testing of network-supplied, rotating electrical machines in accordance with lEC 60034-1, having methods of cooling according to lEC 60034-6 and degrees of protection according to lEC 60034-5, and having the following characteristics: - standard design, either AC or DC, without additional special electrical, mechanical, or acoustical modifications intended to reduce the sound power level - rated output from 1 kW (or kVA) up to and including 5 500 kW (or kVA) - rated speed not greater than 3 750 min–1 This fifth edition cancels and replaces the fourth edition, published in 2003 and its amendment 1, published in 2007. This edition includes the following significant technical changes with respect to the previous edition: a) In Table 2 and Table 3 cooling methods IC01, IC11, IC21 and IC31, IC71, IC81 are now covered. b) This edition adds Table 3 for 60 Hz machines, whereas Table 2, which covers only 50 Hz machines, has no change in levels. c) In Table 3, grade A is added to harmonize the highest levels seen in IEC and NEMA, whereas grade B was added to harmonize the lowest, more restrictive levels seen in IEC and NEMA. d) The clause “Determination of noise increments caused by converter supply” has been shifted to Annex B and renamed “Information on typical noise increments caused by converter supply”.

  • Draft
    20 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 60034-12:2024(Main)
Rotating electrical machines - Part 12: Starting performance of single-speed three-phase cage induction motors
SIST EN IEC 60034-12:2025

IEC 60034-12:2024 is available as IEC 60034-12:2024 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60034-12:2024 specifies the parameters for eight designs of starting performance of single-speed three-phase 50 Hz or 60 Hz cage induction motors in accordance with IEC 60034‑1 that: - have a rated voltage up to 1 000 V; - are intended for direct-on-line or star-delta starting; - are rated on the basis of duty type S1; - are constructed to any degree of protection as defined in IEC 60034-5 and explosion protection. This document also applies to dual voltage motors provided that the flux saturation level is the same for both voltages. This fourth edition cancels and replaces the third edition published in 2016. Aligned with the requirements for explosion protected motors from TC31 WG27 - new clause on methods for measuring locked-rotor current and torque; - new informative annex on the general current and torque characteristics with locked rotor; - new informative annex on correction of voltage and frequency; - aligned with the requirements for explosion protected motors from TC31 WG27.

  • Draft
    20 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 60335-2-40:2024/A11:2024(Amendment)
Household and similar electrical appliances - Safety - Part 2-40: Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers
kSIST prEN IEC 60335-2-40:2023/kFprAA:2024

This European Standard deals with the safety of electric heat pumps, sanitary hot water heat pumps and air conditioners, incorporating motor-compressors as well as hydronic fan coils units, dehumidifiers (with or without motor-compressors), thermoelectric heat pumps and partial units. Their maximum rated voltage being not more than 300 V for single phase appliances and 600 V for multi-phase appliances. Appliances not intended for normal household use but which nevertheless can be a source of danger to the public, such as appliances intended to be used by laymen in shops, in light industry and on farms, are within the scope of this standard.

  • Draft
    22 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 60034-11:2024(Main)
Rotating electrical machines - Part 11: Thermal protection
SIST EN IEC 60034-11:2025

IEC 60034-11:2020 is available as IEC 60034-11:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60034-11:2020 specifies requirements relating to the use of thermal protectors and thermal detectors incorporated into the stator windings or placed in other suitable positions in induction machines in order to protect them against serious damage due to thermal overloads. It applies to single-speed three-phase 50 Hz or 60 Hz cage induction motors in accordance with IEC 60034-1 and IEC 60034-12 that: - have a rated voltage up to 1 000 V; - are intended for direct-on-line or star-delta starting. The main changes with respect to the previous edition are: - the additional specification of winding temperature limits for temperature class 200 (N), - the increased limits of maximum winding temperatures for overloads with rapid variation, - the clarification that the motor winding may be permanently damaged after it has been exposed to temperatures - a clarification of the definition of indirect thermal protection, - a clarification on the test methods for larger motors.

  • Draft
    13 pages
    English language
    sale 10% off
    e-Library read for
    1 day