Band Plan Update
Band plan news
630 METRE BAND
A band plan is being developed for the 630 metre band (472 - 479 kHz).
A detailed paper is available in the "Files For Download" section below. Any comments would be most welcome.
In the interim, please note the following frequencies that are currently in use in Region I.
CW - 472.500 kHz
WSPR - Set dial to 474.2 kHz USB (occupied bandwidth 475.6 - 475.8 kHz)
ROS - Set dial to 476 kHz USB (occupied bandwidth 474.4 - 474.6 kHz)
QRSS - Set dial to 476.175 kHz USB (occupied bandwidth 477.175 - 477.185 kHz). (Some activity also on 478.9 kHz)
WSJTX - Set dial to 477.0 kHz USB (occupied bandwidth 478.0 - 478.5 kHz)
Opera - Set dial to 477.0 kHz USB (occupied bandwidth 478.5 - 478.8 kHz)
6 METRE BAND CHANGES
The band plans paper has been updated with changes to the 6 metre band, to reflect the situation since the closure of Channel 0 television. The changes are discussed in a paper available in the "Files for Download" section. There will be a review of the band plan soon, and any comments on future uses of the band are most welcome.
Band plan review
BAND PLAN REVIEW - PROGRESS REPORT
Changes have been suggested so far for the following bands:
Planning needed for CW and digital mode allocations.
Requests for provision of a 2.1 kHz voice segment.
Current IARU Region I CW and digi frequencies have been incorporated into the band plan as an interim
Further consideration to follow of possible voice frequencies, and how best to resolve the interference
Planning for the segment 50.300 - 52.000 MHz, assuming the return of the full 50 - 54 MHz band to amateur
50.340 - 50.400 MHz reserved for future expansion of beacon segment.
50.400 - 50.500 MHz reserved as guard band for proposed Region I beacon segment.
50.500 - 52.000 MHz reserved with no specific taghs as yet.
Further changes await confirmation from ACMA of the full reallocation of 50 - 52 MHz to the Amateur
Service. No future changes would have any impact on existing operation.
Possible ways of improving spectrum efficiency.
Draft for reallocation of the segment 145.000 - 145.400 MHz published 2012.
Further consideration to be given to reallocation of frequencies formerly used for packet radio.
Possible ways of improving spectrum efficiency.
Difficult because of limited options of avoiding LIPD interference.
Beacon segments on microwave bands
Under the beacon frequency allocation plan, frequencies are reserved for beacons according to geographic
area. This can result in beacons being llocated frequencies that are too close together.
Revision of frequency allocation guidelines to allow more flexibility in choice of frequencies.
23 cm and Higher Bands
Review of channel allocations for ATV, as FM ATV activity is superseded by DATV.
Current channel spacings (20 MHz) allow each channel to be used for AM, FM or digital ATV. Replacement of
AM and FM systems with DATV would allow channel widths to be reduced to 7 MHz.
Recent band plan changes
Please refer to the band plans for an interim plan for the 2200 metre (135.7 - 137.8 kHz) band.
Recommended IARU Region III centre frequencies for emergency operation
At its 2009 meeting, IARU Region III adopted the following frequencies as recommended emergency centre of activity frequencies: 3.600, 7.110, 14.300, 18.160 and 21.360 MHz. As an IARU member society, the WIA has adopted these recommended frequencies.
"Centre of Activity" frequencies are not spot frequencies. They are recommended as starting points for emergency traffic which may extend 5 kHz above or below the designated centre frequency.
6 metre band plan
The 6 metre band plan has been reworded to clarify ACMA operating restrictions between 50 and 52 MHz.
Revised CTCSS Standards
Changes have been made to the standard CTCSS tones to be used for repeater access and linking.
Our licence conditions require tone access for repeaters that are linked to repeaters in certain other bands, to prevent transmissions from being relayed on frequencies that the operators are not entitled to use. CTCSS is also used to activate selective linking or for interference protection.
The following CTCSS tones have been adopted for repeater access:
91.5 Hz: For use with repeaters fitted with CTCSS for interference protection.
141.3 or 146.2 Hz: To activate links to repeaters on other VHF/UHF bands.
85.4 Hz: To activate links to other bands that some operators are not permitted to use.
The previously recommended 123 Hz tone is no longer recommended for future repeaters due to problems with false detecting.
New APRS Channels
Two recommended channels for APRS operation:
6 metres - 53.050 MHz.
70 cm - 439.100 MHz.
2 metre WSPR operation
A note has been added to the 2 metre band plan regarding WSPR operation, which uses an internationally standard frequency of 144.489 MHz. This frequency is within the Australian beacon segment, but it does not clash with any existing beacon.
The band plans have been updated to include revised standards for DVB tranmssion.
2 Metre Band Plan Changes - new digital repeater segment
In 2011, the WIA Board gave the Technical Advisory Committee the task of reviewing the 2 metre band plan and considering ways of improving the efficiency of spectrum use. In particular, the TAC was asked to consider the feasibility of adopting 12.5 kHz channel spacing in the repeater and simplex segments of the band.
The TAC circulated a discussion paper and a proposal developed by the National Repeater and Beacon Coordinator, Peter Mill VK3APO. This draft proposal was supported by the TAC regional representatives and was submitted to the Board along with a report and recommendations. The Board adopted the report and gave approval for these changes to be made.
The essence of the report to the Board was that it is not feasible to adopt 12.5 kHz channel spacing for existing FM repeater and simplex channels, where the equipment in use is all designed for 16 KHz occupied bandwidth and 25 kHz channel spacing. The result would be unacceptable levels of adjacent channel interference. However it is feasible to use a 12.5 kHz channel raster for newer digital modes that have narrower occupied bandwidth and are designed for 12.5 kHz channel spacing.
Due to the limited spectrum available, the only practical approach is to interleave 12.5 kHz channels in between existing 25 kHz channels, where this can be done without creating unacceptable adjacent channel interference. In particular, it is recommended that new repeaters using digital modes such as D-Star and P25 should be allocated frequencies on odd multiples of 12.5 kHz, interleaved between existing 25 kHz spaced channels.
It was also recommended that to minimise interference, it would be desirable if these new repeaters using a 12.5 kHz channel raster were allocated input frequencies in a different band segment from that used by existing FM repeaters. The band segment 145.000 - 145.400 MHz was identified as being suitable for this purpose because it is only lightly used and has very few assigned frequencies. This allows new digital repeaters to share the existing repeater output segment, but to use a transmit-receive offset of 1.6 MHz, which will eliminate the possibility of adjacent channel interference on their input frequencies.
This change requires a rearrangement of the band plan between 145.000 and 145.400 MHz. This can be done with minimal effect on existing operation in this segment. A transition plan has been developed which will have no effect on any existing packet, APRS or WICEN allocations. However it does entail a change for one of the frequencies recommended for simplex D-Star operation.
The changes are described in detail in the "Files for Download" section below. The file includes the original report and recommendations adopted by the WIA Board, and other recommendations on spectrum efficiency and the problem of overcrowding of the 2 metre repeater segments.
Overseas band plan information
IARU Region I: click this Link to the IARU Region I web site.
IARU Region II: click this link>http://www.iaru-r2.org/band-plan/>Link for details of the Region II MF and HF band plans.
IARU Region III: click this Link for Region III band plan information.
New Zealand: click this Link for band plan information from the NZART.
Japan: click this Link for information on band plans in Japan.
Files For Download
Page Last Updated: Tuesday 23 September 2014 at 16:12 hours