HF

The article "IARU Region 1 bandplan - why?" describes the philosophy of the IARU Region 1 bandplan and gives some explanations how to read it.
Access full article in (English version) or (German - Deutsche Version). 
 
 
 
 
                                 

 UNDER CONSTRUCTION

 

 

 

DEFINITIONS

All modes                   CW, SSB and those modes listed as Centres of Activity, plus AM (Consideration should be given to adjacent channel users).

Image modes              Any analogue or digital image modes within the appropriate bandwidth, for example SSTV and FAX.

Narrow band modes   All modes using up to 500 Hz bandwidth, including CW, RTTY, PSK etc.

Digimodes                  Any digital mode used within the appropriate bandwidth, for example RTTY, PSK, MT63 etc.

(*)                             Lowest dial setting for LSB Voice mode: 1843, 3603 and 7053 kHz

    NOTES

Amplitude modulation (AM) may be used in the telephony sub-bands providing consideration is given to adjacent channel users. (NRRL Davos 05).

CW QSOs are accepted across all bands, except within beacon segments. (Recommendation DV05_C4_Rec_13)

The frequencies in the band plan are understood as “transmitted frequencies” (not those of the suppressed carrier!)

 

Sideband Usage        Below 10MHz use lower sideband (LSB), above 10 MHz use upper sideband (USB)

 

Proposed usage of 630m band -(WRC-12, VA14_C4_Rec_02)

 472 475 kHz              CW only – maximum bandwidth 200 Hz

475 – 479 kHz              CW + digimodes

If a frequency is to be selected, particular attention must be paid to still existing Non Directional Beacons (NDB) of the radionavigaton service!

 

RR 5.80A The maximum equivalent isotropically radiated power (e.i.r.p.) of stations in the amateur service using frequencies in the band 472-479 kHz shall not exceed 1 W. Administrations may increase this limit of e.i.r.p. to 5 W in portions of their territory which are at a distance of over 800 km from the borders of Algeria, Saudi Arabia, Azerbaijan, Bahrain, Belarus, China, Comoros, Djibouti, Egypt, United Arab Emirates, the Russian Federation, Iran (Islamic Republic of), Iraq, Jordan, Kazakhstan, Kuwait, Lebanon, Libya, Morocco, Mauritania, Oman, Uzbekistan, Qatar, Syrian Arab Republic, Kyrgyzstan, Somalia, Sudan, Tunisia, Ukraine and Yemen. In this frequency band, stations in the amateur service shall not cause harmful interference to, or claim protection from, stations of the aeronautical radionavigation service.(WRC-12)

RR 5.80A The use of the frequency band 472-479 kHz in Algeria, Saudi Arabia, Azerbaijan, Bahrain, Belarus, China, Comoros, Djibouti, Egypt, United Arab Emirates, the Russian Federation, Iraq, Jordan, Kazakhstan, Kuwait, Lebanon, Libya, Mauritania, Oman, Uzbekistan, Qatar, Syrian Arab Republic, Kyrgyzstan, Somalia, Sudan, Tunisia and Yemen is limited to the maritime mobile and aeronautical radionavigation services. The amateur service shall not be used in the above-mentioned countries in this frequency band, and this should be taken into account by the countries authorizing such use. (WRC-12

 

Unmanned transmitting stations:

 

      IARU member societies are requested to limit this activity on the HF bands.  

      It is recommended that any unmanned  transmitting   stations on HF shall only be activated under operator control except

      for  beacons agreed with the IARU Region 1 beacon coordinator, or specially licensed experimental stations.

The term “automatically controlled data stations” includes Store and Forward stations.

 

Recommendation VA14_C4_REC_06:

Member Societies are reminded of the recommendation in the IARU Region 1 HF Band Plan ‘that any unmanned transmitting stations on HF shall only be activated under operator control, except for beacons agreed with the IARU Region 1 Beacon Coordinator’.


Unmanned transmitting stations, and operation involving unmanned transmitting stations, must adhere to the frequency and bandwidth limits of the band plan.

The operator connecting to an automatically controlled unmanned transmitting station is responsible for not causing interference. This is particularly important in the 30 meter band where the amateur service only has secondary status.

Amateur radio operators may transmit messages via unmanned transmitting stations during coordinated emergency, and disaster preparedness exercises, limited to the duration of such exercises, using a bandwidth not exceeding 2 700 Hz.

Such communication should be announced regularly on the frequency, and radio amateurs not participating in the communication should cooperate by not transmitting on the frequency.



History
     
2005 Davos Introduction of band plan by bandwidth. Effective 1 January 2006
2008 Cavtat Several modifications. Effective 29 March 2009
  CW segment extended from 7000 - 7035 kHz to 7000 -7040 kHz.
  Narrow band modes, digimodes segment moved and extended from 7035 -7038 kHz to 7040 -7047 kHz.
  Narrow band modes, digimodes, segment for automatically controlled stations (unattended)
  moved and extended from 7038 - 7040 kHz to   7047-7050 kHz.
  All modes, digimodes, segment for automatically controlled stations (unattended)
  Introduction of SSB preferred contest segments 7060 -7100 kHz and 7130 -7200 kHz
  Introduction of Digital Voice Activity Centres.  
       
2011 Sun City Several modifications. Effective 17 August 2011
  CW contest preferred segment 7000-7025 kHz withdrawn.
  Segment 29100 - 29200 kHz changed from max. bandwidth 2700 Hz to max. 6000 Hz.
  Introduction of new segment 29100 - 29200 kHz for FM simplex operation (10 kHz channels).
  Removal of FM simplex channels 29520 - 29550 kHz and 29610 - 29650 kHz.
  Number of FM Repeater channels increased to eight, former FM simplex channels
  became new repeater input, respectively repeater output channels.
  FM repeater channels renumbered, RH1 = 29520 / 29620 kHz, RH8 = 29590 / 29690 kHz
  Introduction of FM Simplex Repeater 29610 kHz (parrot, input + output)
       
2014 Varna Several modifications. Effective 26 September 2014
       
  Segment 29000 - 29100 kHz: Change from max. bandwidth 2700 Hz to max. 6000 Hz.
  Satellite segment 29300 - 29510 kHz: Removal of downlink restriction