Level 2 specification
NR/L2/TEL/30066
Clearance From Fixed Radio Frequency Transmitters (formerly RT/E/P/30066)
Issue 8, 05 December 2020 · GSM-R & radio
Clause map — what each clause deals with
| 1 | Purpose | Why fixed transmitters (mobile masts, third-party antennas) near the railway need NR clearance — RF safety and interference |
| 2 | Scope | Which transmitters are in scope — new/upgraded on NR land or nearby |
| 3 | List of Abbreviations | Abbreviations (ALARP, ACLR, ICNIRP, MFCN) |
| 4 | Definitions | Definitions |
| 5 | Background | Background — transmitter types that cause problems |
| 6.1 | Compliance criteria | Compliance categories |
| 6.2 | Electromagnetic field exposure limits for protection of personnel and | EMF exposure limits for people — ICNIRP, assessment, risk assessment |
| 6.3 | Electromagnetic field (EMF) strength limits for protection of trackside Signalling | Field-strength limits to protect S&T equipment |
| 6.4 | Separation between Network Rail operations equipment and fixed radio | Separation distances — between transmitters, from S&T, from substations and bonds |
| 6.5 | MFCN Coordination and cooperation distance for contiguous bands near railway | MFCN coordination near tracks |
| 7 | RF transmitter energisation testing and post- energisation checks | Energisation testing and post-energisation checks; points to L3/31103 |
| 8 | Network Rail review and approval | NR Telecoms Clearance team review and approval workflow |
| A.1 | ICNIRP threshold calculation | ICNIRP threshold calculation |
| B.4 | Total field strength calculation example | Worked example of total field strength |