ISO/IEC 11801-3:2017/Amd 1:2021

Information technology — Generic cabling for customer premises — Part 3: Industrial premises — Amendment 1

Technologies de l'information — Câblage générique des locaux d'utilisateurs — Partie 3: Titre manque — Amendement 1

General Information

• Status: Published
• Publication Date: 14-Apr-2021
• ICS: 35.200 - Interface and interconnection equipment
• Technical Committee: ISO/IEC JTC 1/SC 25 - Interconnection of information technology equipment
• Drafting Committee: ISO/IEC JTC 1/SC 25 - Interconnection of information technology equipment
• Current Stage: 6060 - International Standard published
• Start Date: 15-Apr-2021
• Due Date: 15-Oct-2022
• Completion Date: 15-Apr-2021

Relations

• Amends: ISO/IEC 11801-3:2017 - Information technology — Generic cabling for customer premises — Part 3: Industrial premises
• Effective Date: 28-Aug-2021

Standards Content (Sample)

ISO/IEC 11801-3
Edition 1.0 2021-04
INTERNATIONAL
STANDARD

AMENDMENT 1
Information technology – Generic cabling for customer premises –
Part 3: Industrial premises


ISO/IEC 11801-3:2017-11/AMD1:2021-04(en)

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ISO/IEC 11801-3


Edition 1.0 2021-04




INTERNATIONAL



STANDARD














AMENDMENT 1





Information technology – Generic cabling for customer premises –

Part 3: Industrial premises


























INTERNATIONAL

ELECTROTECHNICAL

COMMISSION






ICS 35.200 ISBN 978-2-8322-9477-2




  Warning! Make sure that you obtained this publication from an authorized distributor.

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– 2 – ISO/IEC 11801-3:2017/AMD1:2021
© ISO/IEC 2021
INFORMATION TECHNOLOGY –
GENERIC CABLING FOR CUSTOMER PREMISES –

Part 3: Industrial premises

AMENDMENT 1

FOREWORD
1) ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission)
form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC
participate in the development of International Standards through technical committees established by the
respective organization to deal with particular fields of technical activity. ISO and IEC technical committees
collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental,
in liaison with ISO and IEC, also take part in the work.
2) The formal decisions or agreements of IEC and ISO on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested IEC and ISO National bodies.
3) IEC and ISO documents have the form of recommendations for international use and are accepted by IEC and
ISO National bodies in that sense. While all reasonable efforts are made to ensure that the technical content of
IEC and ISO documents is accurate, IEC and ISO cannot be held responsible for the way in which they are used
or for any misinterpretation by any end user.
4) In order to promote international uniformity, IEC and ISO National bodies undertake to apply IEC and ISO
documents transparently to the maximum extent possible in their national and regional publications. Any
divergence between any IEC and ISO document and the corresponding national or regional publication shall be
clearly indicated in the latter.
5) IEC and ISO do not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC and ISO marks of conformity. IEC and ISO are not
responsible for any services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this document.
7) No liability shall attach to IEC and ISO or their directors, employees, servants or agents including individual
experts and members of its technical committees and IEC and ISO National bodies for any personal injury,
property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including
legal fees) and expenses arising out of the publication, use of, or reliance upon, this ISO/IEC document or any
other IEC and ISO documents.
8) Attention is drawn to the Normative references cited in this document. Use of the referenced publications is
indispensable for the correct application of this document.
9) Attention is drawn to the possibility that some of the elements of this ISO/IEC document may be the subject of
patent rights. IEC and ISO shall not be held responsible for identifying any or all such patent rights.
Amendment 1 to ISO/IEC 11801-3 has been prepared by subcommittee SC 25: Interconnection
of information technology equipment, of ISO/IEC joint technical committee 1: Information
technology.
The text of this Amendment is based on the following documents:
FDIS Report on voting
JTC1-SC25/2995/FDIS JTC1-SC25/3009/RVD

Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Amendment is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1, available at www.iec.ch/members_experts/refdocs.

_____________

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ISO/IEC 11801-3:2017/AMD1:2021 – 3 –
© ISO/IEC 2021
INTRODUCTION TO THE AMENDMENT
This document contains requirements and/or recommendations for deployment of single pair
balanced cabling on the industrial cabling specified in ISO/IEC 11801-3:2017.
This document also includes end-to-end link requirements for Class D, E and E .
A

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© ISO/IEC 2021
INTRODUCTION
Add the following NOTE below the Figure 1 title:
NOTE Telecommunications infrastructure affects raw material consumption. The infrastructure design and
installation methods also influence product life and sustainability of electronic equipment life cycling. These aspects
of telecommunications infrastructure impact our environment. Since building life cycles are typically planned for
decades, technological electronic equipment upgrades are necessary. The telecommunications infrastructure design
and installation process magnifies the need for sustainable infrastructures with respect to building life, electronic
equipment life cycling and considerations of effects on environmental waste. Telecommunications designers are
encouraged to research local building practices for a sustainable environment and conservation of fossil fuels as
part of the design process.

2 Normative references
Add the following normative references:
IEC 63171-6, Connectors for electrical and electronic equipment – Part 6: Detail specification
for 2-way and 4-way (data/power), shielded, free and fixed connectors for power and data
transmission with frequencies up to 600 MHz
IEC 61156-11, Multicore and symmetrical pair/quad cables for digital communications –
Part 11: Symmetrical single pair cables with transmission characteristics up to 600 MHz –
Horizontal floor wiring – Sectional specification
1
IEC 61156-12 , Multicore and symmetrical pair/quad cables for digital communications –
Part 12: Symmetrical single pair cables with transmission characteristics up to 600 MHz – Work
area wiring
Replace the ISO/IEC 14763-4 reference with the following new reference:
ISO/IEC 14763-4, Information technology – Implementation and operation of customer premises
cabling – Part 4: Measurement of end-to-end (E2E) links, modular plug terminated links (MPTL)
and direct attach cabling
3 Terms, definitions, abbreviated terms and symbols
3.1 Terms and definitions
Add the following terms and definitions at the end of the list:
3.1.14
balanced 1-pair cabling channel
transmission path between equipment constructed from balanced 1-pair cables, balanced 1-pair
connectors and balanced 1-pair cable assemblies to facilitate signal and power delivery
3.1.15
edge distributor
optional additional distributor to accommodate active equipment to allow transition from
balanced 4-pair cabling to balanced 1-pair cabling
____________
1
 Under preparation. Stage at time of publication: IEC CDV 61156-12:2020.

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ISO/IEC 11801-3:2017/AMD1:2021 – 5 –
© ISO/IEC 2021
3.1.16
end-to-end link
transmission path between equipment including the end connections attached to the equipment
3.1.17
bulkhead connection
connection that serves as an interconnection point located through an enclosure wall
3.1.18
segment
cabling between connectors of an end-to-end link
3.2 Abbreviated terms
Add the following abbreviated terms at the end of the list:
B bulkhead connection
C connection
CP consolidation point
ED edge distributor
ffs for further study
L1 length of end-to-end link
SPE Single Pair Ethernet
TI test interface
3.3 Symbols
Replace subclause 3.3 with the following:
Symbols used identically in different parts of ISO/IEC 11801 are defined in
ISO/IEC 11801-1:2017, 3.3.
fixed connector

free connector

connection

bulkhead connection with back-to-back fixed connectors acting as one
connection

bulkhead connection with separated back-to-back fixed connectors
acting as two connections


The symbols shown in Figure 14 define the number of connections in all end-to-end links.

Figure 14 – Symbols for bulkhead connections

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© ISO/IEC 2021
NOTE Bulkhead mounted connections with fixed cable can have a variable length to accommodate the installation
within the cabinet.
4 Conformance
Add the following list items:
f) in case balanced 1-pair cabling channels are installed between the IID or ED and the NI of
an Automation Island, between the IID or ED and the TO or AO, or between the IID and ED,
channels shall conform to the requirements of Annex A;
g) in case balanced 1-pair cabling channels are installed between the ID and the NI of an
Automation Island, channels shall conform to the requirements of Annex E.
5.3.1 General structure
Replace list item a) with the following:
a) Annex A describes the combined cabling structure of generic and industrial cabling system
to connect several AIs via an ID to support critical process control, monitoring and
automation data (PCMA).
5.3.3 Floor cabling subsystem
Replace list item b) with the following:
b) the mechanical termination of the floor cables including the connecting hardware (e.g. of
interconnect or cross-connect) at the FD together with associated patch cords and/or
jumpers, and any passive connections to the IDs.
5.6.2 Channels and permanent links
Add the following new paragraph after the first paragraph of 5.6.2:
The transmission performance of balanced 1-pair cabling between specific test interfaces is
detailed in Annex E for channels.
5.7.2 Distributors
Replace the existing Table 1 with the following new table:
Table 1 – Link lengths equations
Length
Channel
m
a
Intermediate 40
Intermediate 100
b
1 000
Intermediate
Intermediate + horizontal + building backbone + campus backbone 10 000
NOTE In some implementations of the intermediate cabling subsystem in Clause 8, the ID might not support TOs
up to the maximum distance shown.
a
for 40 m balanced 1-pair cabling
b
for 1 000 m balanced 1-pair cabling

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ISO/IEC 11801-3:2017/AMD1:2021 – 7 –
© ISO/IEC 2021
5.7.6 Telecommunications outlet
Add the following to item c) after the second bullet point:
or
• 1-pair of a 1-pair balanced cable;
6.1 General
Delete the sixth and seventh paragraphs.
In the paragraph immediately following Figure 10, delete the word "only".
6.3.2.3 Intermediate cabling
Add the following new paragraphs after the first paragraph:
Generic balanced 1-pair cabling shall comply with the channel performance as required by
Annex C and ISO/IEC 11801-1.
For the applications specified in Annex E, 1-pair cabling shall comply with the channel
performance as required by Annex C and Annex E.
6.3.2.4 Cable sharing
Add the following new paragraph after the first paragraph:
In the case of cable sharing by using balanced 1-pair cabling channels, additional requirements
shall be taken into account for balanced cabling in accordance with ISO/IEC 11801-1 and
ISO/IEC TR 11801-9906:2020, Annex D.
7.2 Balanced cabling
Add the following new paragraphs after the first paragraph:
Generic balanced 1-pair cabling shall comply with the link performance as required by Annex C
and ISO/IEC 11801-1.
For the applications specified in Annex E, 1-pair cabling shall comply with the link performance
as required by Annex C and Annex E.
8.1 General
Add the following after "Clause 6" at the end of the second sentence:
" or performance requirements of Annex E in case balanced 1-pair cabling is installed."
8.2.1 General
Add the following new sentence after the first sentence:
In the case of already installed balanced 1-pair cabling channels for up to 1 000 m the
performance shall be ensured.

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© ISO/IEC 2021
8.2.2.1 Component choice
Add the following at the end of the subclause:
Using the configurations of 8.2.2.3,
– cables in accordance with IEC 61156-11 and IEC 61156-12 and connectors in accordance
with IEC 63171-6 provide cabling performance to the 600 MHz 40 m balanced 1-pair
channel of Annex E;
NOTE Cables in accordance with two future parts of IEC 61156 (IEC 61156-13 and IEC 61156-14) and
connectors in accordance with IEC 63171-6 will provide cabling performance to the 20 MHz 1 000 m balanced
1-pair channel of Annex E.
Add the following new subclause after 8.2.2.2:
8.2.2.3 Balanced 1-pair cabling dimensions
Figure 15a) shows a 40 m balanced 1-pair channel (40 m interconnect – TO model). Figure 15b)
shows a 1 000 m balanced 1-pair channel (1 000 m interconnect – TO model).

a) Interconnect – TO model balanced 1-pair cabling channel 40 m

b) Interconnect – TO model balanced 1-pair cabling channel 1 000 m with up to 10 connections
Figure 15 – Balanced 1-pair intermediate cabling models
Table 5 and Table 6 contain the length assumptions of the 40 m and the 1 000 m, respectively,
balanced 1-pair intermediate cabling.

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ISO/IEC 11801-3:2017/AMD1:2021 – 9 –
© ISO/IEC 2021
Table 5 – Length assumptions used in mathematical modelling
of the 40 m balanced 1-pair intermediate cabling
Segment Length
m
minimum maximum
a
5 34
ID – TO (no CP)
Apparatus attachment cord 1 3
Equipment cord 1 3
All cords – 6
a
Either consists of 34 m cabling and two 3 m cords or can be an end-to-end link configuration (but end-to-end
links do not include a TO).

Table 6 – Length assumptions used in mathematical modelling
of the 1 000 m balanced 1-pair intermediate cabling
Segment Length
m
minimum maximum
a
15 990
ID – TO (no CP)
Apparatus attachment cord 1 5
Equipment cord 1 5
All cords – 10
a
Allows up to two 5 m cords.

In order to accommodate cables used for apparatus attachment cords, patch cords, jumpers
and equipment cords with different insertion loss, the length of the cables used within a channel
shall be determined by the equations shown in Table 7.
Table 7 – Balanced 1-pair intermediate link length equations
Implementation equation
Model Figure
new T1 class for 600 MHz new T1 class for 20 MHz
40 m channel 1 000 m channel
Interconnect – TO (1-pair, 40 m) 15a ffs not applicable
Interconnect – TO (1-pair, 1 000 m) 15b not applicable ffs
l maximum length of the intermediate cable (m)
i
l combined length of patch cords/jumpers, equipment and apparatus attachment cords (m)
a
X ratio of cord cable insertion loss (dB/m) to fixed horizontal cable insertion loss (dB/m)
For operating temperatures above 20 °C, l should be reduced by 0,2 % per °C for screened cables; 0,4 % per °C
i
(20 °C to 40 °C) and 0,6 % per °C (> 40 °C to 60 °C) for unscreened cables.

9.2 Balanced cables
Add the following new sentence and NOTE after the first sentence:
For balanced 1-pair cables with transmission characteristics up to 600 MHz, see IEC 61156-11
and IEC 61156-12.

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© ISO/IEC 2021
NOTE Future parts of IEC 61156 (IEC 61156-13 and IEC 61156-14) will specify requirements for balanced 1-pair
cables with transmission characteristics up to 20 MHz.
Add the following new subclause after 10.2.2.3.
10.2.2.4 Connecting hardware at the TO using balanced 1-pair cable at the TO
Where balanced 1-pair cabling is installed, connecting hardware meeting the mechanical and
physical requirements of IEC 63171-6 shall be used.
For connecting hardware in M I C E installation environments within industrial premises, refer
1 1 1 1
to ISO/IEC 11801-1.
11.2.1 General
Add the following NOTE after the first paragraph:
NOTE Requirements for balanced 1-pair cabling will be given in a future Amendment 1 to ISO/IEC 11801-1:2017.
A.2 Industrial intermediate cabling subsystem
Add a new item e) to the list:
e) the ED – optional.

Replace Figure A.2 with the following new figure:

Figure A.2 – Combined structure of generic and industrial
cabling system using an IID with optional ED
At the end of the paragraph after Figure A.2, add the following new sentence:
The industrial intermediate cabling may include an edge distributor (ED) to accommodate active
equipment to allow transition from balanced 4-pair cabling to balanced 1-pair cabling.
Annex B (normative) Additional reference implementations
B.2.2 Channels with no connections
Replace list item a) with the following new item:
a) an intermediate cabling channel created without intermediate connections,

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ISO/IEC 11801-3:2017/AMD1:2021 – 11 –
© ISO/IEC 2021
B.3 Channels using balanced cabling bulkhead connections
Add the following new paragraph before the first paragraph:
Bulkhead connector assemblies can consist of one free and one fixed connector (jack-plug)
assembly with a cable attached or two back-to-back jacks meeting the distance specifications
defined by IEC 61918 for a specific transmission class.

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© ISO/IEC 2021
Add a new Annex D:
Annex D
(normative)

Requirements for end-to-end link configurations
D.1 General
Annex D provides definitions and requirements for end-to-end links.
In addition, this document provides performance specifications to support Class D, Class E and
Class E balanced cabling channels of ISO/IEC 11801-1. These specifications amend those
A
channel specifications of ISO/IEC 11801-1 by including the impact of the free connectors in
accordance with the interfaces specified in ISO/IEC 11801-3 used to terminate the end-to-end
link.
Tests shall be carried out in accordance with the test methods specified in ISO/IEC 14763-4.
The end-to-end link configurations can include any type of connection.
D.2 Specifications
The specifications for an end-to-end link include the following.
a) The configurations and structure shall meet the specifications outlined in Clause D.3.
b) The interfaces to the cabling shall meet the specifications of ISO/IEC 11801-1 or
ISO/IEC 11801-3 with respect to mating interfaces and performance.
c) Connecting hardware at other places in the cabling structure shall meet the performance
specifications specified in ISO/IEC 11801-1.
d) Installation shall be performed in accordance with IEC 61918 and ISO/IEC 14763-2.
e) The end-to-end links shall meet the specifications of Clause D.4.
f) Performance testing to the specifications of Clause D.4 shall be used to provide assurance
of installed cabling to determine its capacity to support the applications described by
IEC 61918 and ISO/IEC 11801-1.
g) The performance of end-to-end link as specified in Clause D.4 shall support the channel
Performance can be achieved by one of the
specifications specified in ISO/IEC 11801-1.
following when the additional connections are included in the test results:
1) an end-to-end link design and implementation ensuring that the prescribed transmission
performance is met;
2) attachment of appropriate components to a permanent link or CP link meeting the
prescribed performance class of ISO/IEC 11801-1;
3) using compatible cabling components that meet the specifications of ISO/IEC 11801-3
and ISO/IEC 11801-1.
D.3 End-to-end link configurations
There are multiple configurations of end-to-end links that are identified by the number of mated
connections in the configuration including those at the ends of the end-to-end link.
ISO/IEC TR 11801-9902 describes two-, three-, four-, five-, and six-connection end-to-end
links. Figure D.1 shows a worst-case six-connection end-to-end link.
ISO/IEC TR 11801-9902:2017, Annex A provides information regarding CP cords.

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ISO/IEC 11801-3:2017/AMD1:2021 – 13 –
© ISO/IEC 2021

Figure D.1 – Five-segments, six-connections, end-to-end link
D.4 Performance specifications when using end-to-end link limits
D.4.1 General
The performance specifications of D.4.3 are based on the number of connections comprising
the end-to-end link. These specifications are based on the modelling techniques described in
ISO/IEC TR 11801-9903 using the balanced cabling components of Category 5, Category 6 and
Category 6 of ISO/IEC 11801-1 to provide the specification for Class D, Class E and Class E ,
A A
respectively.
The worst-case limits of D.4.2 show the values calculated using the formulae of D.4.3 to D.4.8
for six connections as in Figure D.1.
D.4.2 Worst-case limits
Table D.1, Table D.2 and Table D.3 contain the informative worst-case limits for end-to-end
links containing six connections for Class D, Class E and Class E . The tables summarize the
A
values in D.4.3 to D.4.8, and D.4.9 to D.4.16 contain additional parameters and limits.
Table D.1 – Worst-case Class D end-to-end link performance at key frequencies
Frequency RL IL NEXT PS NEXT ACR-F PS ACR-F
MHz dB dB dB dB dB dB
1 16,73 4,00 63,29 60,29 56,28 53,28
4 16,69 4,69 53,51 50,51 44,24 41,24
10 16,61 7,40 46,88 43,88 36,28 33,28
40 13,20 15,17 36,39 33,39 24,24 21,24
100 8,44 24,82 28,82 25,82 16,28 13,28

Table D.2 – Worst-case Class E end-to-end link performance at key frequencies
Frequency RL IL NEXT PS NEXT ACR-F PS ACR-F
MHz dB dB dB dB dB dB
1 18,45 4,00 65,00 65,00 62,80 59,80
4 18,43 4,26 63,01 60,51 50,76 47,76
10 18,40 6,68 56,49 53,91 42,80 39,80
40 15,20 13,60 46,26 43,52 30,76 27,76
100 10,87 22,11 38,98 36,13 22,80 19,80
250 6,00 36,57 30,73 27,77 14,84 11,84

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© ISO/IEC 2021
Table D.3 – Worst-case Class E end-to-end link performance at key frequencies
A
Frequency RL IL NEXT PS NEXT ACR-F PS ACR-F
MHz dB dB dB dB dB dB
1 19,0 4,0 65,0 62,0 63,3 60,3
16 18,0 8,2 53,2 50,6 39,2 36,2
100 12,0 20,9 39,9 37,1 23,3 20,3
250 8,0 33,9 33,1 30,2 15,3 12,3
500 6,0 49,3 27,9 24,8 9,3 6,3

D.4.3 Return loss (RL) limits
Table D.4 contains the return loss limits for Class D, Class E and Class E end-to-end links.
A
Table D.4 – End-to-end link return loss limits
Class Frequency Minimum return loss
MHz dB
 
 f−1


1≤  

99

 
D
  f−1 


20≤≤f 100 30−10lg f − 0,,27+ 1 29×
( )  

99

 
 
 f−1 
1≤   
249

  
 
 f−1 
24− 5lg f − 0,,55+×1 47
E 10≤   
249

  
 
 f−1 


40≤≤f 250 32−10lg( f)− 0,,55+×1 47
 
 
249
 
 
1≤ 10≤ E
A
40≤ 398,1≤≤f 500
6,0

D.4.4 Insertion loss (IL) limits
Table D.5 contains the insertion loss limits for Class D, Class E and Class E end-to-end links.
A

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ISO/IEC 11801-3:2017/AMD1:2021 – 15 –
© ISO/IEC 2021
Table D.5 – End-to-end link insertion loss limits
Class Frequency Maximum insertion loss
MHz dB
 
02,
1≤≤f 100 1,,05× 1 910 8× ff+ 0,022 2×+ + 6×0,04× f
D ( )  
( )
 
f
 

0,25

1≤≤f 250 (1,,05)×1 82× f+ 0,016 9×+f + 6×0,02× f
E ( )

f

a
E
1≤≤f 500 1, 05× 1,82 f+0,009 1 ×+ff0,25 + 4× 0, 02× f
( )
A
a
Insertion loss (IL) at frequencies that correspond to calculated values of less than 4,0 dB shall revert to a
maximum requirement of 4,0 dB.

D.4.5 NEXT limits
Table D.6 contains the NEXT limits for Class D, Class E and Class E end-to-end links.
A
Table D.6 – End-to-end link NEXT limits
a
Class Frequency
Minimum NEXT
MHz
dB
65,3−−15 lg ff83 20 lg
( ) ( )
 f−1
 
 b
−−20 20
1≤≤f 100 −20 lg 10 +×2 10 − 1,26×
D



99

 



74,3−−15 lg( ff) 94 20 lg( )
 
 f−1
 
 b
−20 −20
E 1≤≤f 250 −20 lg 10 +×2 10 − 2,38×
 
 

249
 
 
 
74,3−−15 lg ( ff) 94 20 lg ( )

a, b
−−20 20
E 1≤≤f 500 −20 lg 10 +×2 10
A


a
Whenever the Class E channel insertion loss at 450 MHz is less than 12 dB, subtract the term
A
1,4((f – 450)/50) from the formula stated above for the range of 450 MHz to 500 MHz.
b
The terms in the formulas are not intended to imply component performance.

D.4.6 PS NEXT limits
Table D.7 contains the PS NEXT limits for Class D, Class E and Class E end-to-end links.
A

---------------------- Page: 17 ----------------------
– 16 – ISO/IEC 11801-3:2017/AMD1:2021
© ISO/IEC 2021
Table D.7 – End-to-end link PS NEXT limits
a
Class Frequency
Minimum PS NEXT
MHz
dB
62,3−−15 lg ff80 20 lg
 ( ) ( ) 

 f−1
  

−20 −20
1≤≤f 100 −20 lg 10 +×2 10 − 1,26×
D

 
99

 
 

 
72,3−−15 lg( ff) 90 20 lg( )
 
 f−1
 
−20 −20
E 1≤≤f 250 −20 lg 10 +×2 10 − 2,38×
 

 
249
 
 
 
72,3−−15 lg ( ff) 90 20 lg ( )

b, c
−−20 20
E 1≤≤f 500 −20 lg 10 +×2 10
A


a
PS NEXT at frequencies that correspond to calculated values of greater than 62,0 dB shall revert to a minimum
requirement of 62,0 dB.
b
Whenever the Class E channel insertion loss at 450 MHz is less than 12 dB, subtract the term
A
1,4((f – 450)/50) from the formula stated above for the range of 450 MHz to 500 MHz.
c
The terms in the formulas are not intended to imply component performance.

D.4.7 ACR-F limits
Table D.8 contains the ACR-F limits for Class D, Class E and Class E end-to-end links.
A
Table D.8 – End-to-end link ACR-F limits
a, b
Class Frequency
Minimum ACR-F
MHz
dB
63,8−−20 lg ff75,1 20 lg
( ) ( )
 

 
−20 −20
1≤≤f 100 −20 lg 10 +×4 10 −1,12
D

 
 

 

67,8−−20 lg( ff) 83,1 20 lg( )
 
 
−20 −20
1≤≤f 250 −20 lg 10 +×4 10 − 0,46
E

 
 
 

67,8−−20 lg ( ff) 83,1 20 lg ( )

−−20 20
E 1≤≤f 500 −20 lg 10 +×4 10
A


a
ACR-F at frequencies that correspond to measured FEXT values of greater than 70,0 dB are for information
only.
b
The ACR-F limit at frequencies that correspond to calculated values of greater than 65,0 dB shall revert to a
minimum requirement of 65,0 dB.

D.4.8 PS ACR-F limits
Table D.9 contains the PS ACR-F limits for Class D, Class E and Class E end-to-end links.
A

---------------------- Page: 18 ----------------------
ISO/IEC 11801-3:2017/AMD1:2021 – 17 –
© ISO/IEC 2021
Table D.9 – End-to-end link PS ACR-F limits
a, b
Class Frequency
Minimum PS ACR-F
MHz
dB
60,,8−−20 lg ff72 1 20 lg
( ) ( )


−20 −20
1≤≤f 100 −20 lg 10 +×4 10 −1,12
D






64,8−−20 lg( ff) 80,1 20 lg( )
 
 
−20 −20
1≤≤f 250 −20 lg 10 +×4 10 − 0,46
E

 
 
 
64,8−−20 lg ( ff) 80,1 20 lg ( )

−−20 20
E 1≤≤f 500 −20 lg 10 +×4 10
A


a

...