Recommendation itu-r sm. 1538-1 Technical and operating parameters and spectrum requirements for short range radiocommunication devices




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5 Common frequency ranges


There are certain frequency bands which are used for short-range radiocommunication devices in all regions of the world. These common bands are indicated in Table 1. Although this Table represents

the most widely accepted set of frequency bands for short-range radiocommunication devices it should not be assumed that all of these bands are available in all countries.

However, it should be noted that short-range radiocommunication devices may generally not be permitted to use bands allocated to the following services:

radio astronomy;

aeronautical mobile;

 safety of life services including radionavigation.

It should further be noted that the frequency bands mentioned in Nos. 5.138 and 5.150 of the Radio Regulations (RR) are designated for industrial, scientific and medical (ISM) applications. Short-range radiocommu­nication devices operating within these bands must accept harmful interference which may be caused by these applications.

Since short-range radiocommunication devices generally operate on a non-interference, no protection from interference basis (see definition of short-range radiocommunication devices in § 2), ISM bands, among others, have been selected as home for these devices.

In the different regions there are a number of additional recommended frequency bands identified to be used for short-range radiocommunication applications. Details of those frequency bands may be found in the appendices.

TABLE 1


Commonly used frequency ranges


ISM within bands under RR Nos. 5.138 and 5.150

6 765-6 795 kHz

13 553-13 567 kHz

26 957-27 283 kHz

40.66-40.70 MHz

2 400-2 483.5 MHz

5 725-5 875 MHz

24-24.25 GHz

61-61.5 GHz

122-123 GHz

244-246 GHz



Other commonly used frequency ranges

9-135 kHz: Commonly used for inductive short-range radiocommunication applications

3 155-3 195 kHz: Wireless hearing aids (RR No. 5.116)

402-405 MHz: Ultra low power active medical implants Recommendation ITU-R SA.1346

5 795-5 805 MHz: Transport information and control systems Recommendation ITU R M.1453

5 805-5 815 MHz: Transport information and control systems Recommendation ITU-R M.1453

76-77 GHz: Transport information and control system (radar) Recommendation ITU-R M.1452




6 Radiated power or magnetic or electric field strength


The radiated power or magnetic or electric field strength limits shown in Tables 2 to 5 are the required values to allow satisfactory operation of SRDs. The levels were determined after careful analysis and are dependent on the frequency range, the specific application chosen and the services and systems already used or planned in these bands.

6.1 European Conference of Postal and Telecommunications Administrations (CEPT) member countries


TABLE 2

Radiated power or magnetic field strength


Maximum radiated power or magnetic field strength level

Frequency bands

7 dB(A/m) at 10 m

457 kHz

42 dB(A/m) at 10 m

2 275 Hz
59.750-60.250 kHz
70-119 kHz
6 765-6 795 kHz
13.553-13.567 MHz
26.957-27.283 MHz

72 dB(A/m) at 10 m
(at 30 kHz descending 3.5 dB/octave)

9.0-59.75 kHz
60.25-70.0 kHz
119-135 kHz

9 dB(A/m) at 10 m

7 400-8 800 kHz

25 W(1)

402-405 MHz

2 mW(1)

173.965-174.015 kHz

5 mW(1)

869.700-870.000 MHz

10 mW(1)

26.957-27.283 MHz
40.660-40.700 MHz
138.2-138.45 MHz
433.050-434.790 MHz
863-865 MHz
868.600-868.700 MHz
869.200-869.300 MHz
2 400-2 483.5 MHz

25 mW(1)

868.000-868.600 MHz
868.700-869.200 MHz
869.650-869.700 MHz
2 400-2 483.5 MHz
5 725-5 875 MHz
9 200-9 975 MHz

(1) Levels are either effective radiated power (e.r.p.) (below 1 000 MHz) or equivalent isotropically radiated power (e.i.r.p.) (above 1 000 MHz).

TABLE 3


Power level


Maximum power level

Frequency bands

100 mW(1)

2 400-2 483.5 MHz (for RLANs only)
17.1-17.3 GHz
24.00-24.25 GHz
61.0-61.5 GHz
122-123 GHz
244-246 GHz

200 mW(1)

5 150-5 350 MHz (indoor use only)

500 mW(1)

869.400-869.650 MHz
2 446-2 454 MHz
(railway applications and RFID outdoor use)

1 W(1)

5 470-5 725 MHz

2 W(1)

5 795-5 815 MHz
(for specific licensed applications only)

8 W(1)

5 795-5 815 MHz
(for specific licensed applications only)

4 W(1)

2 446-2 454 MHz
(for RFID indoor use only)

55 dBm peak power(1)
50 dBm average power(1)
23.5 dBm average power(1) (pulsed radar only)

76-77 GHz

(1) Levels are either effective radiated power (e.r.p.) (below 1 000 MHz) or equivalent isotropically radiated power (e.i.r.p.) (above 1 000 MHz).


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