NOTES ON
THE 430-440 MHz BANDPLAN
1.IARU REGION 1 BANDPLAN
The following notes are part of the officially adopted
IARU Region 1
bandplan, and all member societies should strongly promote adherence to
the
recommendations made in these notes.
1.1. General
- In Europe no input or output channels of FM repeaters
shall be allowed to operate between 432 and 433 MHz.
- Beacons, irrespective of their ERP, will have to be
located in the exclusive beacon part of the band.
1.2. Footnotes
- Telegraphy is permitted over the whole narrow-band DX
part of the band; Telegraphy exclusive between 432.000-432.150 MHz.
- Within IARU Region 1 the frequencies for beacons with
an ERP of more than 50 Watts are coordinated by the IARU Region 1
Beacon Coordinator
- ATV operators should be encouraged to use the
microwave allocations where available, but may continue to use the 430
MHz band where permitted by the licensing authority. In case of
interference between ATV and the Amateur Satellite Service the
Satellite Service should have priority.
- ATV transmissions in the 435 MHz band should take
place in the segment 434.000-440.000 MHz. The video carrier should be
below 434.500 MHz or above 438.500 MHz. National societies should
provide guidance to their members on the exact frequencies to be used,
with due consideration of the interests of other users.
(Noordwijkerhout 1987)
- The words "Sub-regional (national) bandplanning"
appearing in IARU Region 1 VHF/UHF/Microwave bandplans mean the
following:
In bands and sub-bands not available throughout
Region 1, band-planning should be coordinated on a sub-regional basis
between the countries where those bands and sub-bands are allocated to
the Amateur Service. The words "national bandplanning" refer to
bands/segments which are available only in a single country (such as
the 70 MHz band allocation), or only in a few widely separated
countries.
(Torremolinos 1990)
- At the IARU Region 1 Conference in Torremolinos
(1990) the output band for linear transponders was extended from
432.700 to 432.800 MHz under the following condition:
The established use of 432.600 MHz for RTTY
(FSK/PSK) and 432.700 MHz for FAX should be respected when installing
linear transponders which use this allocation.
2. USAGE
The following notes are referring to the Usage column in
the bandplan. As
already set out in the introduction to section IIc, in the right
amateur spirit
operators should take notice of these agreements which are made for
operating
convenience, but no right to reserved frequencies can be derived from a
mention
in the Usage column or from the following notes.
2.1. General
During contests and bandopenings local traffic using
narrow-band modes should
operate between 432.500-432.800 MHz.
2.2. Footnotes
- The HB/DL/OE wide-shift repeater system, already in
use for a long time, is valuable with a view to a better utilisation of
the whole band. Hence IARU Region 1 endorses the system.
This also applies for the French repeater channel
system, also adopted by the Netherlands, which IARU Region 1 supports
as a useful measure to fill a hitherto unused part of the band.
For the numbering of NBFM channels see appendix 2 to
this section
- In the Usage section of the 435 MHz bandplan the
following frequency segments have been designated for digital
communications:
- 430.544-430.931 MHz Extension of the 7.6 MHz
repeater system input for digital comm.
437.194-438.531 MHz Output channels for the above
- 433.619 - 433.781 MHz
438.019 - 438.181 MHz
- 430.394 - 430.581 MHz For digital communication
links
439.794 - 439.981 MHz For digital communication links
With due regard to the band allocated to the Amateur Service by the
national Administration, the interests of other users, possible
interference from e.g. ISM, the specific digital technique or system to
be accommodated etc., a sub-regional, or national choice may be made
within the above segments.
- In those countries where 433.619-433.781 MHz is the
only segment of the 435 MHz band available for digital communications,
modulation techniques requiring a channel separation exceeding 25 kHz
should not be used. If different or incompatible use of this part of
the frequency spectrum in contemplated in neighbouring countries, this
use should be coordinated between the countries concerned with the aim
of avoiding harmful interference.
- On a temporary basis, in those countries where
433.619 - 433.781 MHz is the only segment of the 435 MHz band available
for Digital Communications:
- Channels with centre frequencies 433.700,
432.725, 432.750, 432.775, 434.450, 434.475, 434.500, 434.525, 434.550
and 434.575 may be used for digital communications.
- Use of these channels must nor interfere with
linear transponders.
- Modulation techniques requiring a channel
separation exceeding 25 kHz must not be used on these channels.
(De Haan, 1993)
- At the IARU Region 1 Conference in Torremolinos
(1990) the following recommendation was adopted regarding the segments
for repeaters and links. For a repeater/link to be installed within 150
km of a national border, the member society should co-ordinate the
frequency allocation and the technical (system) data with the member
societies in neighbouring countries. Special attention should be paid
to the common good practice of using directional antennas and the
minimum power necessary.
As a matter of course this agreement is also valid
for any link experiments carried out on the multi-mode channels in the
segment 438.544-438.631 MHz. (De Haan, 1993 ).
- These multi-mode channels are to be used for
experimenting with new transmission technologies (De Haan, 1993)
- In the United Kingdom the use of low-power speech
repeaters on repeater channels in the segment 438.419-438.581 is
allowed. Where necessary, frequencies will be coordinated with
neighbouring countries (De Haan, 1993).
- Experiments using wide band digital modes may take
place in the 435 MHz band in those countries that have the full 10 MHz
allocation. These experiments should be in the all modes section around
a frequency of 434 MHz, use horizontal polarisation and the minimum
power required. (Tel Aviv 1996)
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