SIST ETS 300 373:1999/A1:1999

• Abstract:

  To carry out a general revision of this ETS URGENT TECHNICAL CORRECTION in measurement methods Supporting organisations: ICOM (F), RA (NL), Eurocom (DK), TelekomDanm ark, NTA (N)

• Status: Published
• Publication Date: 30-Sep-1999
• ICS: 33.060.20 - Receiving and transmitting equipment
• ICS: 47.020.70 - Navigation and control equipment
• Technical Committee: RES - Radio equipment and systems
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Oct-1999
• Due Date: 01-Oct-1999
• Completion Date: 01-Oct-1999
• Ref Project: ETSI ETS 300 373/A1 ed.1 (1997-08) - Radio Equipment and Systems (RES); Technical characteristics and methods of measurement for maritime mobile transmitters and receivers for use in the MF and HF bands

SIST ETS 300 373:1999/A1:1999 is the Slovenian adoption of ETS 300 373 Amendment 1, published by SIST from an ETSI amendment. It covers technical characteristics and methods of measurement for maritime mobile transmitters and receivers used in the MF and HF bands. The document is aimed at manufacturers, test laboratories, and conformity teams that need to verify how this radio equipment is built, marked, and measured.

What does SIST ETS 300 373:1999/A1:1999 specify?

SIST ETS 300 373:1999/A1:1999 specifies an urgent technical correction to the measurement methods and related technical requirements for maritime mobile transmitters and receivers. It is centered on practical radio equipment checks such as control layout, distress-frequency marking, emission classes, test conditions, and transmitter and receiver measurements.

The amendment is organized around clauses 4 to 8:

• Clause 4 covers controls, distress frequencies, and classes of emission.
• Clause 5 covers test conditions and measurement uncertainty.
• Clause 6 covers performance checks.
• Clause 7 covers transmitter measurements.
• Clause 8 covers receiver measurements.

What are the key requirements of SIST ETS 300 373:1999/A1:1999?

• Controls must be easy to identify and use. Clause 4.2.1 requires controls to be clearly identifiable from the operator’s position, with a layout that supports simple and efficient operation and reduces accidental operation. In practice, this means the front panel and control grouping must support safe use on board.

• Distress frequencies must be clearly marked. Clause 4.3.3 requires the relevant distress frequencies to be shown on the equipment front panel or on a supplied instruction label, and the tuning controls and settings for those frequencies must also be clearly indicated. This matters because operators need fast, unambiguous access to distress channels.

• The equipment must support the emission classes needed for maritime use. Clause 4.5 names J3E, H3E, and F1B for transmit and receive functions as appropriate to the equipment, with the receiver also allowed to handle other classes of emission. This tells the designer which modes the set is expected to cover.

• Test documentation must state where DC voltage is measured, and uncertainty must be controlled. Clause 5 adds a requirement to specify the DC voltage measurement point in test reports, and clause 5.7.1 gives maximum measurement uncertainties for key parameters, with uncertainty evaluated to a 95 % confidence level using ETR 028 [8]. For testing, that means results must be traceable and reported in a consistent way.

• The performance check focuses on a few core operating checks. Clause 6.3 checks transmitter frequency error at 2 182 kHz in H3E, transmitter output power, and receiver maximum usable sensitivity with AGC operative. In practice, these are the basic “does the set work correctly on a distress-related channel?” checks.

• Transmitter quality is checked under vibration and for unwanted outputs. Clause 7 includes vibration testing, intermodulation product limits, modulation depth limits, and conducted spurious emission measurements over a wide frequency range. This matters because maritime equipment must keep working and stay spectrally clean in service conditions.

• Receiver performance is checked across sensitivity, rejection, spurious outputs, and AGC behavior. Clause 8 covers vibration testing, maximum usable sensitivity by band and emission class, spurious response rejection, conducted emissions at the antenna port, whistles in the output, AGC checks, and a 15-minute unmodulated RF test. For users, this defines how to prove that the receiver remains usable and stable in real operating conditions.

What terms does SIST ETS 300 373:1999/A1:1999 define?

• J3E - Single-sideband telephony with the carrier suppressed by at least 40 dB below peak envelope power (PEP).
• H3E - Single-sideband telephony on 2 182 kHz only, with the carrier 4.5 dB to 6 dB below PEP.
• F1B - Frequency-shift keying (FSK) suitable for Digital Selective Calling (DSC), with a frequency shift of ±85 Hz.
• DSC - Digital Selective Calling, the calling mode linked here to F1B operation and distress use.
• AGC - Automatic gain control, used in the receiver checks to keep output usable while signal level changes.
• SINAD - The receiver quality measure used in the sensitivity check, set to 20 dB in the performance check.
• PEP - Peak envelope power, the power reference used in the emission-class and carrier-power requirements.

Who uses SIST ETS 300 373:1999/A1:1999?

SIST ETS 300 373:1999/A1:1999 is used by manufacturers of maritime MF/HF transmitters and receivers, test laboratories, and conformity assessment teams. It is also useful to quality managers and buyers who need to check that a product has been designed for the right emission classes, marked correctly, and tested with the right measurement methods. In practice, these users rely on it for panel design, distress-frequency marking, uncertainty reporting, vibration testing, spurious emission checks, and receiver sensitivity verification.

What changed in SIST ETS 300 373:1999/A1:1999 from the previous edition?

SIST ETS 300 373:1999/A1:1999 is Amendment 1 to ETS 300 373 (1995). The amendment states that it is an urgent technical correction and updates:

• control arrangement requirements,
• distress-frequency indication,
• emission-class provisions,
• test-report handling for DC voltage measurement points,
• measurement uncertainty values and conditions,
• performance check wording,
• intermodulation limits,
• transmitter and receiver vibration measurement methods,
• spurious-emission measurement methods and limits,
• modulation-depth limits,
• receiver sensitivity limits,
• spurious response rejection,
• receiver conducted-emission limits,
• whistle search checks,
• AGC performance checks,
• and the receiver endurance-style RF test.

Which standards are used with SIST ETS 300 373:1999/A1:1999?

• ETR 028 [8] - used for calculating measurement uncertainty at a 95 % confidence level.
• ETS 300 373 (1995) - the base European Telecommunications Standard that this amendment modifies.

What does the SIST ETS 300 373:1999/A1:1999 document contain?

The document contains the amendment text, the updated clause wording, and the measurement procedures needed to apply the standard in practice. It includes a table of distress frequencies, a table of conducted spurious-emission limits, a table of maximum usable sensitivity by band and emission class, and a graph for 4-tone modulation limits. It also gives test setups for transmitter and receiver vibration testing, spurious-emission scans, AGC checks, and receiver whistle searches. These parts are the basis for design verification, laboratory testing, and conformity records.

SLOVENSKI STANDARD
01-oktober-1999
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Radio Equipment and Systems (RES); Technical characteristics and methods of
measurement for maritime mobile transmitters and receivers for use in the MF and HF
bands
Ta slovenski standard je istoveten z: ETS 300 373/A1 Edition 1
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
47.020.70 Navigacijska in krmilna Navigation and control
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

ETS 300 373
AMENDMENT A1
August 1997
Source: ETSI TC-RES Reference: RE/RES-01028
ICS: 33.020
Key words: Maritime, radio, telephony
This amendment A1 modifies
the European Telecommunication Standard ETS 300 373 (1995)
Radio Equipment and Systems (RES);
Technical characteristics and methods of measurement for
maritime mobile transmitters and receivers for
use in the MF and HF bands
URGENT TECHNICAL CORRECTION
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [e-mail]
Tel.: [phone] - Fax: [phone]
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1997. All rights reserved.

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ETS 300 373: August 1995/A1: August 1997
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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ETS 300 373: August 1995/A1: August 1997
Foreword
This amendment to ETS 300 373 (1995) has been produced by the Radio Equipment and Systems (RES)
Technical Committee of the European Telecommunications Standards Institute (ETSI).
Transposition dates
Date of adoption of this amendment: 8 August 1997
Date of latest announcement of this amendment (doa): 30 November 1997
Date of latest publication or endorsement of this amendment (dop/e): 31 May 1998
Date of withdrawal of any conflicting National Standard (dow): 31 May 1998

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ETS 300 373: August 1995/A1: August 1997
Amendments
4.2.1 General
Replace entire subclause with the following:
All controls shall be easily identified from the position at which the operator operates the equipment.
The number of operational controls, their design and manner of functioning, location, arrangement and
size should provide for simple, quick and efficient operation. Controls which are not necessary for normal
operation shall not be readily accessible to the operator.
The controls should be arranged in a manner which minimizes the risk of inadvertent operation.
For transmitters it shall be possible to change the transmitter from any class of emission to another for
which it is designed to operate by means of not more than one control.
For receivers the class of emission shall be selectable by not more than one control.
4.3.3 Distress frequencies
Replace entire subclause with the following:
The distress frequencies shown in table 1 which are applicable to the equipment, shall be clearly
indicated, either on the front panel of the equipment or on an instruction label supplied with the equipment.
Table 1: Distress frequencies
DSC Telephony Telex
(kHz) (kHz) (kHz)
2 187,5 2 182 2 174,5
4 207,5 4 125 4 177,5
6 312 6 215 6 268
8 414,5 8 291 8 376,5
12 577 12 290 12 520
16 804,5 16 420 16 695
NOTE: The above DSC and telex frequencies are
assigned frequencies whereas the carrier
frequency is indicated for telephony.
In addition, manual controls necessary for the tuning of the equipment to the relevant frequencies in
table 1, and their settings, shall be clearly indicated.
4.5 Classes of emission
Replace entire subclause with the following:
The equipment shall provide for the transmission and/or reception of signals using the classes of emission
defined below, as appropriate to the equipment:
J3E SSB telephony, with the carrier suppressed at least 40 dB below peak envelope
power;
H3E SSB telephony on the frequency 2 182 kHz only with the carrier 4,5 dB - 6 dB
below peak envelope power. For on-board test purposes, using only a dummy
load, facilities shall be provided for H3E operation on the frequency of
2 200 kHz;
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ETS 300 373: August 1995/A1: August 1997
F1B FSK suitable for DSC with a frequency shift of ± 85 Hz. Alternatively class of
modulation J2B can be used with a 1 700 Hz sub-carrier. In this case the
equipment shall be tuned to a carrier frequency 1 700 Hz below the assigned
frequency.
The receiver may also provide for the reception of signals of other classes of emission.
5 Test conditions
Add the following:
When preparing test report forms for equipment tested in accordance with this ETS, the point where the
DC voltage is measured shall be specified (see subclause 5.2).
5.7.1 Measurement uncertainty
Replace entire subclause with the following:
Parameter Maximum value of
measurement
uncertainty
-8
RF frequency:
± 1 × 10
± 1,5 dB
RF Power, PEP in 50 Ω
± 2,5 dB
RF Power, PEP in 10 Ω / 250 pF
Conducted spurious emissions of transmitter: ± 4 dB
Audio output power: ± 0,5 dB
Sensitivity of receiver: ± 3 dB
Conducted emission of receiver: ± 3 dB
Two signal measurement: ± 4 dB
Three signal measurement: ± 3 dB
For the test methods according to this ETS the uncertainty figures are valid to a confidence level of 95 %
calculated according to the methods described in ETR 028 [8].
6.3 Performance check
Replace entire subclause with the following:
For the purpose of this ETS, the term "performance check" shall be taken to mean the following
measurements and limits:
for the transmitter:
- frequency error:
With the transmitter connected to an artificial antenna (see subclause 5.5), the transmitter
shall be tuned to the frequency 2 182 kHz and operated in H3E mode. The transmitter
frequency shall be within ± 10 Hz of 2 182 kHz;
- output power:
With the transmitter connected to an artificial antenna (see subclause 5.5), the transmitter
shall be tuned to the frequency 2 182 kHz and operated in H3E mode. When keyed without
modulation, the output power of the transmitter (carrier power) shall be within 15 W and
140 W;
- for the receiver:
- maximum usable sensitivity.
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ETS 300 373: August 1995/A1: August 1997
With the AGC operative, the receiver shall be adjusted to 2 182 kHz and operated in H3E
mode. A test signal as specified in subclause 5.6.2.2 shall be applied. The level of the input
signal shall be adjusted until the SINAD at the output of the receiver is 20 dB, and the output
power is at least the standard output power (see subclause 8.1.1). The level
...