IEC 62320-1:2007/AMD1:2008

Amendment 1 - Maritime navigation and radiocommunication equipment and systems - Automatic identification system (AIS) - Part 1: AIS Base Stations - Minimum operational and performance requirements, methods of testing and required test results

Specifies the lamp dimensions, electrical characteristics for lamp starting and operation together with information for ballast, ignitor and luminaire design purposes. This is a loose-leaf publication. Amendments containing new and revised sheets are issued periodically. Consolidated edition incorporating amendment 1, 2, 3, 4, 5, 6, 7 and 8

General Information

• Status: Published
• Publication Date: 28-Oct-2008
• ICS: 29.140.30 - Fluorescent lamps. Discharge lamps
• ICS: 47.020.70 - Navigation and control equipment
• Technical Committee: TC 80 - Maritime navigation and radiocommunication equipment and systems
• Drafting Committee: WG 14 - TC 80/WG 14
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 20-Jan-2015

Relations

• Revised: IEC 62320-1:2015 - Maritime navigation and radiocommunication equipment and systems - Automatic identification system (AIS) - Part 1: AIS Base Stations - Minimum operational and performance requirements, methods of testing and required test results
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62320-1
Edition 1.0 2008-10
INTERNATIONAL
STANDARD

AMENDMENT 1
Maritime navigation and radiocommunication equipment and systems –
Automatic identification system (AIS) –
Part 1: AIS Base Stations – Minimum operational and performance requirements,
methods of testing and required test results


IEC 62320-1:2007/A1:2008(E)

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IEC 62320-1
Edition 1.0 2008-10
INTERNATIONAL
STANDARD

AMENDMENT 1
Maritime navigation and radiocommunication equipment and systems –
Automatic identification system (AIS) –
Part 1: AIS Base Stations – Minimum operational and performance requirements,
methods of testing and required test results


INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
N
ICS 47.020.70 ISBN 978-2-88910-670-7
® Registered trademark of the International Electrotechnical Commission

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– 2 – 62320-1 Amend. 1 © IEC:2008(E)
FOREWORD
This amendment has been prepared by IEC technical committee 80: Maritime navigation and
radiocommunication equipment and systems.
The text of this amendment is based on the following documents:
CDV Report on voting
80/522/CDV 80/543/RVC

Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
NOTE The amendment clarifies some of the tests and adds an extra sentence to Annex A.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

____________
CONTENTS
Replace, in the list of CONTENTS, the existing Annex A title by the following new Annex A
title:
Annex A (normative) Additional AIS Base Station sentences

4.5 Base Station input/output sentence formatters
Replace the existing Table 1 by the following new Table 1:
Table 1 – Base Station input/output sentence formatters
Sentence Input Input Output Output
Description
formatter independent dependent independent dependent
Addressed and binary broadcast
ABK  X
acknowledgement
Addressed binary and safety
ABM X
related message
AIS regional channel assignment
ACA X Q
message
Preparation and initiation of an
AIS Base Station addressed
ACM X
channel message (VDL Message
22)
ACK X X  Acknowledge alarm

---------------------- Page: 4 ----------------------
62320-1 Amend. 1 © IEC:2008(E) – 3 –
Sentence Input Input Output Output
Description
formatter independent dependent independent dependent
AIS Device Status (output interval
ADS  X X configured by BCE and upon
status change)
Preparation and initiation of an
AIS Base Station broadcast of a
AGA X  Q
group assignment message
(Message 23)
ALR  X X
Set alarm state
AIS interrogation request (VDL
AIR X
Message 15)
Preparation and initiation of an
ASN X  AIS Base Station broadcast of
assignment VDL Message 16
BBM X  Broadcast binary message
General Base Station
BCE X X Q Q
configuration extended
General Base Station
BCF X X Q Q
configuration
CAB X X Q Q Control AIS Base Station
Not supported by this IEC
CBM
standard
Data Link Management slot
allocations for Base Station (VDL
DLM X Q
Message 20 – FATDMA
reservations)
Configure broadcast rates for
ECB X Q Base Station messages with
epoch planning support
Frame summary of AIS reception,
defined by SPO. The manufacturer
FSR  X X
shall declare the parameters that
are supported
Installation of a station’s
SID X X
identification
Select AIS device’s reception
SPO X X Q Q
processing and output
Transmit feed-back report – Base
Station report on status of
TFR  X X
requested transmission. Automatic
status response of TSA+VDM
Transmit Slot Assignment – used
to identify AIS time slot used to
TSA X X
transmit the content of a VDM
sentence. TSA shall preceed the
VDM sentence
TSP X  Transmit Slot Prohibit
Transmit Slot Prohibit status
TSR  X
Report. Automatic status response
of TSP
VDM X X X X
VHF Data-link message
VHF Data-link Own-vessel
VDO  X X
message
Version information about
VER  Q Q equipment. Provided in response
to ABQ
VDL Signal Information, defined
VSI  X X
by SPO. The manufacturer shall
declare the parameters that are

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– 4 – 62320-1 Amend. 1 © IEC:2008(E)
Sentence Input Input Output Output
Description
formatter independent dependent independent dependent
supported and the corresponding
accuracy. The VSI shall follow its
associated VDM/VDO
NOTE 1 “X” indicates input to, or output from, the AIS Base Station. “Q” indicates that the sentence may be
externally requested using the IEC 61162-1 “$xxABQ,xxx” query sentence (see Annex A) method(s) in order for
the identified sentence to be output.
NOTE 2 Sentence formatters shown in shaded rows are described in IEC 61162-1.

5.3 Minimum requirements for the TDMA transmitter of the AIS Base Station
Replace the existing Table 5 by the following new Table 5:
Table 5 – Minimum required TDMA transmitter characteristics
Transmitter parameters 25 kHz channels 12,5 kHz channels
Carrier power error
± 1,5 dB ± 1,5 dB
Carrier frequency error
± 500 Hz ± 500 Hz
Spectrum mask for slotted transmissions
–25 dBc at ± 10 kHz 0 dBc at ± 2,5 kHz
–70 dBc at ± 25 kHz –60 dBc at ± 12,5 kHz
Transmitter test sequence and modulation accuracy ‘0’ bit start for test signals 1 ‘0’ bit start for test
and 2 signals 1 and 2
1 760 Hz + 352 Hz/ –176 Hz 535 Hz + 108 Hz/ –54 Hz
for test signal 1 for test signal 1
2 400 Hz ± 240 Hz for test 1 200 Hz ± 120 Hz for
signal 2 test signal 2
Transmitter output power versus time Power within mask shown in Not applicable
Figure 11 and timings given
in Table 12
Intermodulation attenuation ≥ 40 dB Not applicable

6.2.1 General rules
Replace the eleventh bullet and text by the following:
• when the UTC sync source is unavailable, the AIS Base Station shall use UTC indirect or
shall be synchronised to another Base Station;

6.3.1 General rules
Replace the third bullet and text by the following:
• when the UTC sync source is unavailable, the independent AIS Base Station shall use
UTC indirect or the semaphore rules as defined by ITU-R M.1371;
Add, after the last bullet and text, the following:
• all VDL messages shall be as short as possible.

6.3.4.8 AIS Base Station response to VDM input
Add, after the second paragraph, the following new text:

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62320-1 Amend. 1 © IEC:2008(E) – 5 –
A transmission initiated by a VDM input shall not replace a scheduled message.
Messages 4, 11 and 20 shall not be transmitted.
Messages 15 and 16 shall not be transmitted if a slot offset is provided unless the slot offset
is recalculated by the base station. Messages that have a Comm.state shall have the
Synch.state bits of the Comm.state set to the current status of the station. The remaining
Comm.state bits shall be set to zero to prevent false slot allocations.
The repeat indicator shall be set to greater than zero before transmitting.
After receiving a VDM sentence, the Base Station responds with the appropriate TFR
sentence.

6.3.5 Autonomous channel management
Add the following text as a new second paragraph:
The “in use” data field of the ACA sentence defines the status of the region (0 = not in use,
1 = in use). The manufacturer shall declare the number of regions supported.

6.4 BIIT conditions
Replace the existing text by the following text:
The AIS Base Station shall monitor the following BIIT conditions and shall generate the
appropriate ALR sentences on the PI. The ALR sentence shall be output at least once per
minute. The alarm conditions are noted in Table 9 and the resulting alarm status is sent via PI
sentence ADS. If an alarm is active (acknowledged or not), the ADS alarm status field is set
to A; if no alarm is active the field is set to V.

6.5.3 DGNSS dedicated port option
Replace the existing text by the following:
The AIS Base Station may be configured to transmit DGNSS corrections (Message 17) that
are input via a dedicated RTCM SC104 format DGNSS port.
Base Stations shall convert the RTCM SC104 format to VDL format before transmission.
This option shall only be available for the independent operation and care should be taken to
minimise the impact on the VDL.

8.1.4.1 Standard test signal number 1
Replace the existing text by the following text:
For TDMA Type 1: A test signal consisting of a 26 ms packet (1 slot) of 010101.

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– 6 – 62320-1 Amend. 1 © IEC:2008(E)

8.1.4.2 Standard test signal number 2
Replace the existing text by the following text and delete the Note:
For TDMA Type 2: A test signal consisting of a 26 ms packet (1 slot) of 00001111.

Table 12 – Maximum values of absolute measurement uncertainties
Delete the final entry:
Transmitter transient frequency (frequency difference) ± 250 Hz

9.2.6.2 Method of measurement
Replace the existing item d) by the following new item d):
d) the transmitter shall be modulated with a continuous test signal number 1;

anufacturers’ declarations
9.3.8.2 M
Replace the existing item c) by the following new item c):
3
c) frequency of the local oscillator at 162,025 MHz (AIS2) and at the lowest TDMA channel
(f , f ).
LOH LOL

9.3.8.6 Method of search over the "limited frequency range" using SINAD
measurement
Replace the existing item b) by the following new item b):
b) The wanted signal, provided by generator A, shall be at 162,025 MHz and shall be
modulated with a 1 kHz sine wave at ±2,4 kHz deviation.
Add, after item i), the following item j):
j) Repeat the test using the lowest frequency.

9.3.8.7 Method of search over the limited frequency range using PER or BER
measurement
Replace the existing item b) by the following new item b):
b) The wanted signal, provided by generator A, shall be at 162,025 MHz and shall be
modulated to generate test signal number 3.
Add, after item i), the following new item j):
j) Repeat the test using the lowest frequency.

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62320-1 Amend. 1 © IEC:2008(E) – 7 –

9.3.8.8 Method of measurement (at identified frequencies)
Replace the existing item b) by following new item b):
b) The wanted signal, provided by generator A, shall be at the high and low channels used
for the calculation of SFI and SFI and shall be modulated to generate test signal
1 2
number 3.
9.3.9.3 Method of measurement
Add the following Note after the existing text:
NOTE The step size of the frequency of the unwanted signal in 9.3.8.6 h) and 9.3.8.7 h) should be reduced to
2,5 kHz.

10.2.1.7 VDM re-broadcast
Replace the existing subclause heading by the following new heading:
10.2.1.7 VDM to VDL processing

10.2.1.7.1 Purpose
Delete the Note:
NOTE It is required that the repeat indicator is set to >0 before re-transmitting, because Class B “CS” has to
exclude those messages from its synchronisation algorithm.

10.2.1.7.3 Required results
Replace the existing text by the following new text:
NOTE The following results are required for a Base Station operated as an independent unit.
a) Confirm that the EUT generates an appropriate TFR sentence and does NOT transmit the
VDM.
b) Confirm that the BCE sentence was received correctly by the EUT using the query for the
BCE sentence. Confirm that the EUT generates an appropriate TFR sentence and
transmits the Message within 4 s.
c) Confirm that the DLM sentence was received correctly by the EUT using the query
sentence for the DLM sentence. Confirm that the ECB sentence was received correctly by
the EUT using the query sentence for the ECB sentence.
d) Confirm that the EUT generates an appropriate TFR sentence and transmits each
allowable Message, allowing up to 4 s between transmissions in available FATDMA or
RATDMA slots. Confirm that the information in each transmitted Message is complete and
correct. Confirm that the appropriate VDO sentence is output on the PI when a message is
transmitted. Confirm that VDL Message 4, 11 and 20 VDM sentences are not transmitted.
Confirm that VDL messages 15 and 16 are only transmitted when no slot offset is
provided.
e) Confirm that the EUT generates an appropriate TFR sentence and transmits the message
after correcting Comm.state and that the repeat indicator is not zero.

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– 8 – 62320-1 Amend. 1 © IEC:2008(E)
f) Confirm the EUT generates an appropriate TFR sentence and does NOT transmit the
VDM.
g) Confirm that the DLM sentence was received correctly by the EUT using the query
sentence for the DLM sentence. Confirm that the EUT transmits the 5 VDM messages one
in each frame.

10.2.1.8.2 Method of measurement
Replace the existing text by the following new text:
Set up the standard test environment and operate the EUT as defined in the pre-set-up
conditions.
a) Apply TSA+VDM sentence pair with encapsulated Message 1 to 23 to the EUT.
b) Apply the following TSA+VDM sentence pair with inappropriate Comm.state and repeat
indicator to the EUT:
$xxTSA,AA0000003770007,9,A,HHMM,2100,2*hh
!xxVDM,1,1,9,A,15M3NSwP00J6TN>?a0e3Ngv000Sq,0*hh
c) Apply five TSA and five VDM sentences with encapsulated Message 1 to the EUT
assigning the transmission of the five Messages 1s in consecutive slots on the same
channel.
$xxTSA,AA0000003770007,0,A,HHMM,1001,2*hh
!ABVDM,1,1,0,A,15M3NSwP00J6TN0?a0iT0D01,0
$xxTSA,AA0000003770007,1,A,HHMM,1002,2*hh
!ABVDM,1,1,1,A,15M3NSwP00J6TN0?a0iT0D01,0
$xxTSA,AA0000003770007,2,A,HHMM,1003,2*hh
!ABVDM,1,1,2,A,15M3NSwP00J6TN0?a0iT0D01,0
$xxTSA,AA0000003770007,3,A,HHMM,1004,2*hh
!ABVDM,1,1,3,A,15M3NSwP00J6TN0?a0iT0D01,0
$xxTSA,AA0000003770007,4,A,HHMM,1005,2*hh
!ABVDM,1,1,4,A,15M3NSwP00J6TN0?a0iT0D01,0
d) Apply the TSA+VDM sentence pair with an encapsulated message ID that is undefined,
with the correct message structure to the EUT.
$xxTSA,AA000
...