 For instance, if one carrier is at 1000.000 kHz, and the other at 1000.150 kHz, then a 150 Hz "beat frequency" tone  will result.
<clarity>  For instance, if one carrier is at 1000.000 kHz, and the other at 1000.150 kHz, then a 150 Hz "beat frequency" tone  will result.
 For instance, if one carrier transmits at 1000.000 kHz, and the other at 1000.150 kHz, then a 150 Hz "beat frequency" tone will result.