Le bandplanning entre 50 et 54 MHz
Attention: en Belgique uniquement le segment 50-52 MHz est accessible
| Frequency | Max Bandwidth | Mode | Usage |
| 50.000 50.100 |
500 Hz |
Telegraphy (except beacon project) |
50.000 - 010 Region-1 * 50.010 - 020 Region-2 * 50.020 - 030 Region-3 * * Reserved for future Synchronised Beacon Project 50.050 CW future International centre of activity 50.090 CW Intercontinental centre of activity |
| 50.100 50.200 |
2700 Hz |
Telegraphy SSB |
International preferred 50.100 - 130 Intercontinental section 50.110 Intercontinental centre of activity (a) 50.130 - 200 international section 50.150 International centre of activity |
| 50.200 50.300 |
2700 Hz |
Telegraphy SSB |
General usage 50.285 for crossband |
| 50.300 50.400 |
2700 Hz |
MGM Narrowband Telegraphy |
50.305 PSK Centre of activity 50.310 - 320 EME centre of activity 50.320 - 380 MS centre of activity |
| 50.400 50.500 |
1000 Hz |
MGM Telegraphy |
Beacons exclusive |
| 50.500 50.700 |
- |
All modes |
50.540 - 580 Simplex FM Internet Voice Gateways 50.620 - 700 Digital communications (e) 50.630 DV calling |
| 50.700 50.900 |
12 kHz |
FM / Digital voice |
50.710 – 890 FM/DV repeaters output channels |
| 50.900 51.200 |
- |
All modes |
Fore wideband digital experiments - see Note (e) |
| 51.200 51.400 |
12 kHz |
FM / Digital voice |
51.210 - 390 FM/DV Repeater Input channels |
| 51.400 52.000 |
- |
All modes |
51.410 - 590 FM/DV Simplex 51.510 FM calling frequency 51.810 – 990 FM repeaters output channels Fore wideband digital experiments - see Note (e) |
| 52.000 54.000 |
500 kHz |
All modes |
PAS AUTORISÉ EN BELGIQUE (f) |
1.2.1 Notes: bandplan
- legacy usage for MGM is accepted, but effort should be made to move this to 50,300 – 50,400 MHz. Usage by operators may vary due to restrictions on national allocations
- DV = Digital Voice
1.2.2 Footnotes
a. The intercontinental DX calling frequency 50.110 MHz should not be used for calling within the European part of Region 1 at any time.
b. deleted.
c. deleted.
d. Embedded data traffic is allowed along with Digital Voice. DV users should check that the channel is not in use by other modes.
e. Experiments using wider bandwidth digital modes may take place in the 50 MHz band within the 50.5 - 52 MHz segment where local conditions permit, on a shared basis that does not cause interference to other users (including narrowband/beacon use and repeater inputs)
- Options for this include around 50.6, 51.0 or 51.7 MHz
- Recommended maximum bandwidths for such usage are:
- 50kHz in the 50.5-50.7 segment
- 200kHz in the 50.9-50.2 segment
- 500kHz in the 51.4-52.0 MHz segment
f. In those Region 1 countries where 52 - 54 MHz (or parts thereof) is allocated, its use should be planned on the basis of up to 4 x 500 kHz blocks which may be sub-divided to suit digital applications. Amateurs using digital transmission methods must also ensure that their transmissions do not spread beyond band edges.
g. Amateurs using digital transmission methods must also ensure that their transmissions do not spread beyond band/segment edges.
1.2.3 Usage Notes
a) FM: for technical specifications of FM telephony and channel numbering, refer to the relevant parts of this Handbook.
b) Repeaters In those Region 1 countries where it is allowed to set up repeaters on 50 MHz, the indicated channels are recommended in order to establish a commonality. Provision is made in the band plan for two options based on a common set of input channels:
g. Amateurs using digital transmission methods must also ensure that their transmissions do not spread beyond band/segment edges.
1.2.3 Usage Notes
a) FM: for technical specifications of FM telephony and channel numbering, refer to the relevant parts of this Handbook.
b) Repeaters In those Region 1 countries where it is allowed to set up repeaters on 50 MHz, the indicated channels are recommended in order to establish a commonality. Provision is made in the band plan for two options based on a common set of input channels:
i) Outputs at 500kHz below the input frequencies (Nov Sad 2020)
ii) Outputs at 600kHz above the input frequencies (Tel Aviv 1996)
ii) Outputs at 600kHz above the input frequencies (Tel Aviv 1996)
The more recent recommended use of the lower output (-500kHz) option for voice repeaters, avoids the overlap near 51.9 MHz with experimental and other emerging wideband applications. The lower output frequencies may also be easier for obtaining regulatory permissions. As per IARU-R1 recommendations, CTCSS should be used for FM Repeaters and Gateways.
c) Wideband Experimentation
c) Wideband Experimentation
- Spectral re-growth can be a major issue when operating digital modes. Close attention should be given to amplifier linearity to control the final transmitted bandwidth and avoid such regrowth affecting adjacent users.
- Member Societies should encourage such 50 MHz digital experiments to support innovation and development of the band; and report results back to IARU Region 1
(VHF Managers handbook 9.00 - November 2020)
