23 centimeters

From Wikipedia, the free encyclopedia

23 centimeters is a common amateur radio band located in the UHF spectrum between 1240 and 1300 MHz.

Most all modes of communication used in amateur radio can be found in the 23 cm band. Some of the more common modes include FM voice, Packet, as well as ATV.

[edit] Band Plan

Below is the ARRL US band plan for the 23cm band:

1240-1246 MHz	Amateur television channel 1
1246-1248 MHz	Narrow-bandwidth FM point-to-point links and digital, duplex with 1258-1260 MHz
1248-1258 MHz	Digital Communications
1252-1258 MHz	Amateur television channel 2
1258-1260 MHz	Narrow-bandwidth FM point-to-point links and digital, duplexed with 1246-1248 MHz
1260-1270 MHz	Satellite uplinks
1260-1270 MHz	Wide-bandwidth experimental, simplex ATV
1270-1276 MHz	Repeater inputs, FM and linear, paired with 1282-1288, 239 pairs every 25 kHz, e.g. 1270.025, .050, etc.
1271-1283 MHz	Non-coordinated test pair
1276-1282 MHz	Amateur television channel 3
1282-1288 MHz	Repeater outputs, paired with 1270-1276
1288-1294 MHz	Wide-bandwidth experimental, simplex ATV
1294-1295 MHz	Narrow-bandwidth FM simplex services, 25-kHz channels
1295-1297 MHz	Narrow bandwidth weak-signal communications (no FM)
1295.0-1295.8 MHz	SSTV, FAX, ACSSB, experimental
1295.8-1296.0 MHz	Reserved for EME, CW expansion
1296.00-1296.05 MHz	EME-exclusive
1296.07-1296.08 MHz	CW beacons
1296.4-1296.6 MHz	Crossband linear translator input
1296.6-1296.8 MHz	Crossband linear translator output
1296.8-1297.0 MHz	Experimental beacons (exclusive)
1297-1300 MHz	Digital Communications

[edit] Frequencies of note

• CW and SSB calling frequency is 1296.1 MHz.
• FM simplex calling frequency is 1294.5 MHz.

Very high frequency (VHF) and Ultra high frequency (UHF) Amateur radio bands
VHF				UHF
6 m	4 m	2 m	1.25 m	70 cm	33 cm	23 cm	13 cm
50 MHz	70 MHz	144 MHz	219-220 MHz	420 MHz	902 MHz	1.24 GHz	2.3-2.31 GHz
54 MHz	70.5 MHz	148 MHz	222-225 MHz	450 MHz	928 MHz	1.3 GHz	2.39-2.45 GHz