The ARRL Board of Directors has unanimously voted to approve the 9 cm band plan, as presented by the ARRL UHF/Microwave Band Plan Committee. Earlier this year, the committee asked radio amateurs for comments on a proposed 9 cm band plan, explaining that the purpose of these band plans is to share information about how the amateur bands are being used and to suggest compatible frequency ranges for various types of application. The committee also recognized that local conditions or needs may necessitate deviations from a band plan, and that regional frequency coordinating bodies may recommend alternatives for use in their respective regions.
The new 9 cm band plan (see below) includes the following notations:
- This band plan includes all other emission modes authorized in the 9 cm amateur band whose necessary bandwidth does not exceed the suggested bandwidths listed.
- Weak Signal Terrestrial legacy users are encouraged to move to 3400.3-3401.0 MHz, as time and resources permit.
- Broadband segments may be used for any combination of high-speed data (e.g. 802.11 protocols), Amateur Television and other high-bandwidth activities. Division into channels and/or separation of uses within these segments may be done regionally, based on need and usage.
- Per ITU RR 5.149 from WRC-07, these band segments are also used for Radio Astronomy. Amateur use of these frequencies should be first coordinated with the National Science Foundation.
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Level I – Major Band Divisions Level II – Sub-Band Divisions Level III Suggested Suggested Frequency Range (MHz) Frequency Range (MHz) Specific Freq. Emission Types Emission B.W. From To Width From To Width MHz (Note 1) (Note 1) Functional Use 3300,000 3309,000 9,0 Analog & Digital, including Full Duplex 0.1 – 1.0 MHz Analog & Digital; paired with 3430.0-3439.0; 130 MHz Split 3309,000 3310,000 1,0 Experimental 3310,000 3330,000 20,0 Analog & Digital, including Full Duplex >1.0 MHz Analog & Digital; paired with 3410.0-3430.0; 100 MHz Split 3330,000 3332,000 2,0 Experimental 3332,000 3339,000 7,0 RADIO ASTRONOMY PROTECTED BAND (Note 4) 3339,000 3345,800 6,8 Analog & Digital, including Full Duplex 0.1 – 1.0 MHz Analog & Digital; paired with 3439.0-3445.8; 100 MHz Split 3345,800 3352,500 6,7 RADIO ASTRONOMY PROTECTED BAND (Note 4) 3352,500 3355,000 2,5 Analog & Digital, including Full Duplex 0.05 – 0.2 MHz Analog & Digital; paired with 3452.5-3455.0; 100 MHz Split 3355,000 3357,000 2,0 Experimental 3357,000 3360,000 3,0 Analog & Digital, including Full Duplex 50 kHz or less Analog & Digital; paired with 3457.0-3460.0 3360,000 3400,000 40,0 OFDM, others 22 MHz max. Broadband Modes (Note 3) 3360,000 3380,000 20,0 ATV Amateur Television of all authorized modulation standards/formats at local option 3400,000 3410,000 10,0 CW, SSB, NBFM 6 kHz or less Amateur Satellite Communications 3400,000 3400,300 0,3 CW, SSB, Digital 3 kHz or less Weak Signal EME Band 3400,300 3401,000 0,7 CW, SSB, Digital 3 kHz or less Terrestrial Weak Signal Band – Future (Note 2) 3400,100 CW, SSB, Digital EME Calling Frequency 3410,000 3430,000 20,0 Analog & Digital, including Full Duplex >1.0 MHz Analog & Digital; paired with 3310.0-3330.0; 100 MHz Split 3430,000 3439,000 9,0 Analog & Digital, including Full Duplex 0.1 – 1.0 MHz Analog & Digital; paired with 3300.0-3309.0; 130 MHz Split 3439,000 3445,800 6,8 Analog & Digital, including Full Duplex 0.1 – 1.0 MHz Analog & Digital; paired with 3339.0-3345.8; 100 MHz Split 3445,800 3452,500 6,7 Experimental 3452,500 3455,000 2,5 Analog & Digital, including Full Duplex 0.05 – 0.2 MHz Analog & Digital; paired with 3352.5-3355.0; 100 MHz Split 3455,000 3455,500 0,5 100 kHz or less Crossband linear translator (input or output) 3455,500 3457,000 1,5 CW, SSB, NBFM, Digital 6 kHz or less Terrestrial Weak Signal Band – Legacy (Note 2) 3456,100 6 kHz or less Weak Signal Terrestrial Calling Frequency 3456,300 3457,000 0,1 CW, Digital 1 kHz or less Propagation Beacons 3457,000 3460,000 3,0 Analog & Digital, including Full Duplex 50 kHz or less Analog & Digital; paired with 3357.0-3360.0; 100 MHz Split 3460,000 3500,000 40,0 OFDM, others 22 MHz max. Broadband Modes (Note 3) 3460,000 3480,000 20,0 ATV Amateur Television of all authorized modulation standards/formats at local option
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