UBARoyal Belgian Amateur Radio Union

slideshow 1

Photo: Couloir

Bandplanning between 50 and 54 MHz

Attention: In Belgium only the segment 50-52 MHz is 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

NOT AUTORIZED IN BELGIIUM

(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:
i) Outputs at 500kHz below the input frequencies (Nov Sad 2020)
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
  • 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)