Medium Frequency (MF) band channel allocation
When AM signal is of 25KHz, calculate the number of channels required in Medium Frequency (MF) band of 300KHz-3000KHz.
Correct Answer: d) 54
Medium Frequency (MF) is the band of frequencies from 300 KHz to 3MHz. The lower portion of the MF band (300to 500 kilohertz) is used for ground-wave transmission for reasonably long distances. The upper and lower ends of the mf band are used for naval purpose.
Frequency available in MF band= 3000-300 = 2700 KHz
The bandwidth required by 25 KHz signal = 2* 25= 50 KHz
Therefore the number of channels available = 2700/ 50 = 54