SIST ETS 300 133-6 E1:2003

SIST ETS 300 133-6 E1:2003 is the Slovenian standard identical to ETS 300 133-6 Edition 1, published by SIST and based on ETSI work for Paging Systems (PS) and the European Radio Message System (ERMES). It specifies the conformance requirements for ERMES base stations, including transmitter characteristics, synchronization-related frequency accuracy, and the test methods used to verify them. Engineers, manufacturers, and test laboratories use it to check whether a base station meets the ERMES base station specification.

What does SIST ETS 300 133-6 E1:2003 specify?

SIST ETS 300 133-6 E1:2003 defines the requirements for base stations operating on ERMES. It gives a general description of the base station, then sets detailed radio frequency (RF) requirements and the methods used to test them.

The document is organized into:

• Scope
• Normative references
• Definitions
• Abbreviations
• Base station description
• RF requirements
• Test methods
• History

The foreword places this part within the seven-part ETS 300 133 series for ERMES. In practice, that helps readers see where the base station specification fits alongside the general, service, network, air interface, receiver, and operation and maintenance parts.

What are the key requirements of SIST ETS 300 133-6 E1:2003?

SIST ETS 300 133-6 E1:2003 focuses on how an ERMES base station shall be built, what it shall transmit, and how its RF behavior shall be checked. The most important requirements are in clauses 5, 6, and 7.

Base station function and interfaces

Clause 5 states that a base station consists of one or more transmitters with associated control and timing equipment. It shall transmit on one or more of the sixteen ERMES channels and comply with ETS 300 133-4. This matters because the station must fit the ERMES air interface, not just generate a signal.

Where the I2 interface is used, the base station receives paging and control information from a Paging Area Controller (PAC). The control information shall indicate the channel, and the system information shall indicate the required timing within the transmission protocol. The base station is then responsible for adding preamble, synchronisation, address partition terminators, and message delimiters, as well as the error correction coding and interleaving specified in ETS 300 133-4. In practice, this separates network control functions from the radio formatting work done by the base station.

RF operating limits

Clause 6 requires the base station to meet I-ETS 300 113 unless otherwise specified, and then adds ERMES-specific limits. The extreme temperature range is - 10 °C to + 55 °C, so equipment must remain within specification over that range.

The modulation format is 4-PAM/FM, and the rise or fall time for the frequency transition between successive symbols shall be 88 μs ± 2 μs. The in-channel RF spectrum of the continuous component shall fit the stated mask, which gives the spectral limits the transmitter must respect.

Frequency accuracy and symbol timing

Clause 6 also requires the nominal transmission frequency to stay within ± 200 Hz of the centre frequency. For quasi synchronous networks, transmitters shall be configurable to avoid relative offsets of less than 10 Hz in overlapping coverage areas. The difference between adjacent symbol frequencies shall be 3125 ± 15 Hz.

The short-term symbol rate shall be 3125.00 baud ± 1 ppm over periods up to one second. For long-term stability, the document points back to ETS 300 133-4. In practice, this is what keeps multiple base stations aligned enough to avoid interference and decoding errors.

Test methods

Clause 7 gives the measurement setups and signals used to verify the transmitter. It specifies the test arrangement, the repetitive data streams for checking symbol transition shaping, the pseudo-random sequence for RF spectrum checks, and the streams used to measure centre frequency, symbol frequencies, and symbol rate. That makes the standard usable for lab verification and type testing.

What terms does SIST ETS 300 133-6 E1:2003 define?

• Base station - One or more transmitters plus the associated control and timing equipment.
• I1 interface - The radio interface between the base stations and the paging receivers.
• I2 interface - The interface between the Paging Area Controller (PAC) and the Base Station (BS) for telecommunication and operation & maintenance services.
• Paging Area Controller (PAC) - The functional block that communicates with the Paging Network Controller (PNC) and manages one Paging Area (PA) through the I2 interface.
• ERMES - European Radio Message System, the paging system covered by the standard.
• Symbol - Two bits of information, corresponding to one of the four modulation levels used on the air interface.
• RF - Radio Frequency, used here for transmitter spectrum, frequency, and modulation requirements.

Who uses SIST ETS 300 133-6 E1:2003?

SIST ETS 300 133-6 E1:2003 is used by people who design, build, test, or approve ERMES base stations. That includes base station manufacturers, RF and systems engineers, conformance test laboratories, and network engineers working with Paging Area Controllers and paging network equipment.

It is also relevant to buyers or quality managers who need a clear conformance target when specifying base station equipment for ERMES deployments. The document helps them check that the equipment can transmit on the correct channels, stay within frequency limits, and operate over the stated temperature range.

What changed in SIST ETS 300 133-6 E1:2003 from the previous edition?

SIST ETS 300 133-6 E1:2003 is identified as ETS 300 133-6 Edition 1. The document history records it as first edition in July 1992, with a later PDF conversion noted in January 1996.

Which standards are used with SIST ETS 300 133-6 E1:2003?

SIST ETS 300 133-6 E1:2003 cites these companion documents:

• ETS 300 133-1 - General aspects of ERMES
• ETS 300 133-2 - Service aspects
• ETS 300 133-3 - Network aspects, including the optional I2 interface
• ETS 300 133-4 - Air interface specification, including modulation, symbol timing, and long-term stability
• ETS 300 133-5 - Receiver conformance specification
• ETS 300 133-7 - Operation and maintenance aspects
• I-ETS 300 113 - General radio equipment and test conditions used as the baseline for RF requirements

What does the SIST ETS 300 133-6 E1:2003 document contain?

The document contains a short technical structure rather than a large set of annexes or worked examples. Its main technical material is the base station description, the RF limits, and the test methods used to verify modulation shape, spectrum, frequency tolerance, and symbol rate.

Clause 7 is especially practical for laboratories because it states the test arrangements, the data patterns to transmit, and the measurement approach for each parameter. The spectrum section specifies analyzer settings, while the frequency and symbol-rate sections describe how to measure and calculate the results.