APPENDIX VI

MILEAGE SEPARATION TABLES

The required separations between broadcasting stations as tabulated below are based upon the following conditions:

1. The use of nondirectional antennas.

2. Antenna efficiencies (in mv/m at one mile for one kilowatt)

3. Frequency, 1000 kc.

4. Soil conductivity, s = 10-13.

5. Soil dielectric constant, e = 15.

6. Groundwave transmission as shown on chart in Appendix IV.
7. Skywave transmission as shown on chart in Appendix V.
8. Protection to service areas as shown in Appendix II, Table I.
9. Ratio of desired to undesired signal:

REQUIRED DISTANCE IN MILES FROM THE BOUNDARY OF A COUNTRY IN WHICH A CLASS I-A STATION IS LOCATED FOR DAYTIME
OPERATION OF A CLASS II ON THE SAME CHANNEL

TABLE IV

REQUIRED NIGHT SEPARATION IN MILES BETWEEN BROADCAST STATIONS ON THE SAME CHANNELS

The following tables indicate the mileage protection each class must give all other classes.

Class II-Must protect other classes as shown below.

Class III-A-Must protect other classes as shown below.

• See Appendix VII for protection Class III stations should give Class II stations on regional channels.