TB/T 3485-2017 in English
SUPERSEDEDTechnical specification of balise transmission system
- Issued on:2017-09-29
- Implemented on:2018-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$873.00
| Standard No: | TB/T 3485-2017 |
| Document status: | SUPERSEDED |
| Superseded by: |
TB/T 3485-2017/XG1-2022 Technical specification of balise transmission system , includes Amendment 1
|
| Superseded on: | 2022-08-26 |
| Title in English: | Technical specification of balise transmission system |
| Title in Chinese: | 应答器传输系统技术条件 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2017-09-29 |
| Implemented on: | 2018-04-01 |
| Professional Classification: | TB-Railway Transport |
| Related Topics: | answer
iec standard response pass transmission equipment transmission equipment Reactor transmission technology System Suitability Conditions tb/t 3474.1-2017 do not answer stream response System Requirements and Specifications tb/t 3478-2017 tb/t3192-2017 |
Introduction
Balancer Transmission System Core Specifications
| Equipment Type | Operating Temperature | Protection Level | MTBF |
|---|---|---|---|
| Balancer | -40℃~70℃ | IP67 | ≥3×10⁵h |
| LEU | -40℃~70℃ | IP20 | ≥2×10⁵h |
| BTM | -25℃~70℃ | IP20 | ≥2×10⁴h |
Key technical requirements
Transmission characteristics of interface "A": The uplink adopts FSK modulation, the center frequency is 4.234MHz±175kHz, the data rate is 564.48kbit/s±2.5%, and the magnetic field consistency deviation in the action area is ≤±1.5dB.
Message encoding: It adopts 83×11-bit long format (830 bits of user data) or 21×11-bit short format (210 bits), including 12-bit scrambling code and 75-bit parity check.
Comparison of installation specifications
| Parameters | Large size transponder | Standard size transponder |
|---|---|---|
| Reference area | 358mm×488mm | 200mm×390mm |
| Minimum center distance (300km/h) | 3.0m | 3.0m |
| Installation height (below rail surface) | 93~210mm | 93~193mm |
Safety integrity assurance
The system meets SIL4 requirements, and key safety functions include:
- Bit error rate <10⁻⁶ (center of the action area)
- Positioning error ≤±1m (safety application)
- Crosstalk protection distance ≥2.6m (same-track transponder)
Typical fault protection: When the active transponder fails at interface "C", it should switch to default message transmission within ≤341 bit time.
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