SERA FREQUENCY UTILIZATION PLAN for 144 - 148 MHz
144.000 - 144.050 EME CW
144.050 - 144.100 General CW Operation
144.100 CW National Calling Frequency
144.100 - 144.200 EME and Weak Signal SSB
144.200 - 144.300 General SSB Operation
144.200 SSB National Calling Frequency
144.275 - 144.300 Propagation Beacons
144.300 - 144.500 Multi-Mode Operation
144.390 APRS Nationwide (Mode = 1200 Baud FM Packet)
144.510 - 144.890 FM and D-Star Repeater Inputs
144.910 - 145.090 FM Digital/Packet Simplex and D-Star Repeater Outputs
145.110 - 145.490 FM and D-Star Repeater Outputs
145.510 - 145.790 FM Digital/Packet Simplex (Auxiliary)
145.800 - 146.000 Satellite Sub-Band
146.010 - 146.385 FM and APCO P25 Repeater Inputs
146.400 - 146.585 FM Voice Simplex and Alternate Repeater Inputs
146.420 - 146.480 D-Star Voice Simplex and Repeater Inputs
146.520 FM National Calling Frequency
146.610 - 147.390 FM and APCO P25 Repeater Outputs
147.405 - 147.585 FM Voice Simplex and Alternate Repeater Inputs
147.420 - 147.480 D-Star Voice Simplex and Repeater Inputs
147.600 - 147.990 FM and APCO P25 Repeater Inputs
Repeater Sub-band 144.50 - 145.50 MHz
20 Repeater Pairs, 20 KHz spacing, 600 KHz in/out
144.510 - 145.110 144.530 - 145.130 144.550 - 145.150
144.570 - 145.170 144.590 - 145.190 144.610 - 145.210
144.630 - 145.230 144.650 - 145.250 144.670 - 145.270
144.690 - 145.290 144.710 - 145.310 144.730 - 145.330
144,750 - 145.350 144.770 - 145.370 144.790 - 145.390
144.810 - 145.410 144.830 - 145.430 144.850 - 145.450
144.870 - 145.470 144.890 - 145.490
These pairs are available for the coordination and assignment of analog FM repeaters.
Their coordination and assignment is determined using nominal FM coordination guidelines and
other considerations, and those pertinent to co-channel and adjacent channel assignment.
19 D-Star and NXDN Repeater Pairs, 20 KHz spacing, 600 KHz in/out
144.520 - 145.120 144.540 - 145.140 144.560 - 145.160
144.580 - 145.180 144.600 - 145.200 144.620 - 145.220
144.640 - 145.240 144.660 - 145.260 144.680 - 145.280
144.700 - 145.300 144.720 - 145.320 144.740 - 145.340
144.760 - 145.360 144.780 - 145.380 144.800 - 145.400
144.820 - 145.420 144.840 - 145.440 144.860 - 145.460
144.880 - 145.480
D-Star – NXDN – P25 Only Repeater Pairs (wide offsets)
4 D-Star Only Repeater Pairs, 20 KHz spacing, 2500 KHz in/out
147.420 - 144.920 147.440 - 144.940 147.460 - 144.960
147.480 - 144.980
4 D-Star – NXDN – P25 Only Repeater Pairs, 20 KHz spacing, 1400 KHz
in/out
146.420 - 145.020 146.440 - 145.040 146.460 - 145.060
146.480 - 145.080
IMPORTANT NOTE: Due to the prior assignment of frequencies in these ranges for alternate
FM repeater inputs, these D-Star only pairs may not initially be available in all areas.
Digital/Packet Simplex Frequencies
25 Simplex Channels
144.910 144.930 144.950 144.970 144.990 145.010 145.030
145.050 145.070 145.090 145.510 145.530 145.550 145.570
145.590 145.610 145.630 145.650 145.670 145.690 145.710
145.730 145.750 145.770 145.790
FM Voice Simplex Frequencies
146.400* 146.415* 146.430* 146.445* 146.460* 146.475*
146.490* 146.505* 146.520 146.535 146.550 146.565
146.580 146.595 147.405* 147.420* 147.435* 147.450*
147.465* 147.480* 147.495* 147.510 147.525 147.540
147.555 147.570 147.585
146.520 is the National FM Voice Simplex Calling Frequency
IMPORTANT NOTE: = Frequencies marked with * are permitted for simplex use as long as it
does not cause interference to nearby repeater inputs. Please be aware that SERA coordinates
some of these frequencies as repeater inputs in some areas. Check the Repeater Journal
directory in your area to see if any such repeaters are present.
D-Star - DMR - NXDN - P25 Digital Voice Simplex Frequencies
146.420* 146.440* 146.460* 146.480* 147.420* 147.440*
147.460* 147.480*
IMPORTANT NOTE: = Frequencies marked with * are permitted for simplex use as long as it
does not cause interference to nearby repeater inputs. Please be aware that SERA coordinates
some of these frequencies as repeater inputs in some areas. Check the repeater directory in
your area to see if any such repeaters are present. The use of these frequencies for D-Star
operation, whether for simplex or repeater inputs, may impact FM simplex and repeater
operations and their selection should be carefully considered.
Standard Repeater Band 146 - 148 MHz
68 Repeater Pairs, 15 KHz spacing, 600 KHz in/out,
(with alternate input & output frequency pairs shown)
146.010 - 146.610 146.025 - 146.625 146.040 - 146.640
146.055 - 146.655 146.070 - 146.670 146.085 - 146.685
146.100 - 146.700 146.115 - 146.715 146.130 - 146.730
146.145 - 146.745 146.160 - 146.760 146.175 - 146.775
146.190 - 146.790
146.205 - 146.805 146.220 - 146.820 146.235 - 146.835
146.250 - 146.850 146.265 - 146.865 146.280 - 146.880
146.295 - 146.895
146.310 - 146.910 146.325 - 146.925 146.340 - 146.940
146.355 - 146.955 146.370 - 146.970 146.385 - 146.985
146.400 - 147.000 146.415 - 147.015* 146.430 - 147.030*
146.445 - 147.045* 146.460 - 147.060* 146.475 - 147.075*
146.490 - 147.090* 146.505 - 147.105
147.405 - 146.805 147.420 - 146.820* 147.435 - 146.835*
147.450 - 146.850* 147.465 - 146.865* 147.480 - 146.880*
147.495 - 146.895
147.600 - 147.000 147.615 - 147.015 147.630 - 147.030
147.645 - 147.045 147.660 - 147.060 147.675 - 147.075
147.690 - 147.090 147.705 - 147.105
147.720 - 147.120 147.735 - 147.135 147.750 - 147.150
147.765 - 147.165 147.780 - 147.180 147.795 - 147.195
147.810 - 147.210 147.825 - 147.225 147.840 - 147.240
147.855 - 147.255 147.870 - 147.270 147.885 - 147.285
147.900 - 147.300 147.915 - 147.315 147.930 - 147.330
147.945 - 147.345 147.960 - 147.360 147.975 - 147.375
147.990 - 147.390
IMPORTANT NOTE: = Due to the allocation of frequencies in this range for D-Star repeater
inputs, it is recommended that the frequency pairs marked with * using these alternate inputs not
be selected for application and assignment for FM repeaters going forward.
Changes to the SERA 144-148 MHz FUP approved by action of the SERA Board of Directors on January 05, 2008.
HAHjr
Changes to 144-148 MHZ FUP approved by SERA BOD June 06,2015
Dr. Mke Fariss
