IARU REGION I 144 MHZ
|IARU Region 1 bandplan
||E.M.E. (SSB &
||Random MS Telegraphy reference
||FAI activity SSB
||Random MS SSB
||Random MS SSB
||ATV SSB talkback centre of
||NBFM REPEATER INPUT, 12.5 kHz
spacing, (channel freqs 145.000-145.1875 MHz)
SIMPLEX CHANNELS 12.5kHz spacing, (channel freqs 145.200-145.5875
||NBFM REPEATER OUTPUT, 12.5kHz
spacing, (channel freqs 145.600-145.7875 MHz)
THE 144-146 MHz BANDPLAN
1. IARU REGION I BANDPLAN
The following notes are part of the officially adopted
IARU Region 1
bandplan, and all member societies should strongly promote adherence to
recommendations made in these notes.
- In Europe no input or output channels of NBFM
repeaters shall be allowed to operate between 144 and 145 MHz.
- Except in the part of the band allocated to the
Amateur Satellite Service it is not allowed to use input or output
frequencies in the 145 MHz band for repeaters with input or output in
other amateur bands (Miskolc-Tapolca 1978).
- No packet-radio networks will be set up in the 145
MHz band and no access from the 145 MHz band to networks on other bands
will be allowed.
It is recognised that in some parts of Region 1 the
introduction of packet-radio may require the use of access frequencies
in the 144-146 MHz band for a limited time (Düsseldorf 1989).
Note. The parts of Region 1 meant
are those parts with low amateur population and/or those at the
periphery of the Region, where exceptions can be tolerated as these do
not harm the orderly use of the band in the parts of Region 1 where
there is a greater pressure on the available spectrum space. In the
latter part of the Region the second paragraph of the footnote should never
be used to justify ignoring the first part for a considerable time.
- Beacons, irrespective of their ERP, will have to be
situated in the beacon part of the band.
- Telegraphy is permitted over the whole band, but
preferably not in the beacon band; Telegraphy exclusive between
- 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; the frequencies for beacons with and ERP of 10
Watts or more shall be communicated to the Beacon Coordinator.
If there is a real need for more repeater channels,
it is recommended that Societies or Repeater Groups consider setting up
a repeater system on the higher frequency band(s).
Further to this subject the following recommendation
was adopted in De Haan, 1993:
For FM repeater and simplex operation in the 144
to 146 MHz band IARU Region 1 will change to a genuine 12.5 kHz channel
Furthermore in Tel Aviv, 1996 it was decided that
societies shall promote the use of the 12.5 kHz channel spacing
standard for NBFM channels in order to effectively implement the 12.5
kHz system .
- Established simplex frequencies on repeater output
channels may be retained.
- In view of the important public relations aspect of
amateur satellite activities, it was decided at the IARU Region 1
Conference in Miskolc-Tapolca (1978) that:
i) AMSAT will be allowed to use the band
145.8-146.0 MHz for amateur satellite activity.
This decision was re-confirmed at the IARU Region 1
Conference in Brighton (1981).
- No unmanned stations shall use the all-mode segment
(Tel Aviv 1996)
- Network stations shall only operate in the part of
the 145 MHz band allocated to Digital Communications and will be
permitted only for a limited time. Such network stations should also
have access ports on other VHF/UHF or Microwave bands and should not
use the 144 MHz band to forward traffic to other network stations. In
view of the time limitation the set-up of new network stations is not
encouraged (De Haan, 1993).
Unmanned packet radio stations are only allowed in
the segment 144.800-144.990 MHz. Outside of this segment the signal
level produced by those stations shall be not larger than 60 dB below
the carrier level (measured in a 12 kHz bandwidth). Any other unmanned
packet radio and digital access points must cease operation not later
than 31 December 1997.(Tel Aviv 1996).
- Footnote withdrawn.
- For a limited period - and never longer than novice
stations in The Netherlands are only allowed to use SSB between 144.440
and 144.490 MHz - SSB and Telegraphy operations are also allowed in the
144.440/144.490 MHz part of the beacon band. (Tel Aviv 1996 )
- All beacons shall move from the 144.850/144.990 MHz
segment to the 144.400/144.490 MHz segment before 1 July 1997. When
coordinating frequencies the beacon coordinator shall try to place well
known DX-beacons in the 144.400-144.440 MHz segment. Digital
communications shall not use the 144.850/144.990 MHz segment before 1
July 1997. (Tel Aviv 1996 )
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
operators should take notice of these agreements which are made for
convenience, but no right to reserved frequencies can be derived from a
in the Usage column or from the following notes.
At the meeting of the VHF/UHF/Microwaves Committee in
Vienna, March 1992, the
following recommendation was adopted:
Societies should publish the use of 144.140-144.160
MHz as an alternative
for EME operation. The results of this test should be monitored with
the aim of
incorporating this segment as EME alternative into the Usage part of
bandplan if successful.
- Publicity should be given to the usage of frequencies
around 144.600 MHz by RTTY stations, in order to keep these frequencies
clear from other traffic and to avoid interference with those RTTY
- Footnote withdrawn.
- For NBFM voice communications with special stations
like manned spacecraft it is recommended to use 145.200 MHz for simplex
operation or 145.200/145.800 MHz for split-channel operation (Vienna
1995/Tel Aviv 1996).
- In order to make worldwide operation of the SAREX
project possible in its nitial phase and facilitating the conversion
towards use of higher frequency bands, the frequency 144.490 MHz can be
used for uplink communication using NBFM for a limited period but not
after 1 October 1999 (Tel Aviv 1996).