Some TV / Radio devices want channel frequencies keyed in Mhz, Khz or Hz.
e.g. 177.5Mhz = 177500Khz = 177500000Hz
Here is a quick conversion table to help you work out the values.
Starting with the base unit of frequency:
1Hz = 1cps (cycle per second and Hertz are the same)
1Khz = 1,000Hz
1Mhz = 1,000Khz = 1,000,000Hz
1Ghz = 1,000Mhz = 1,000,000Khz = 1,000,000,000Hz
1Thz = 1,000Ghz = 1,000,000Mhz = 1,000,000,000Khz
1Phz = 1,000Thz = 1,000,000Ghz = 1,000,000,000Mhz
Abrev.= multiplier
Hertz = base unit 100
Khz = Kilo Hertz 103
Mhz = Mega Hertz 106
Ghz = Giga Hertz 109
Thz = Tera Hertz 1012
Phz = Peta Hertz 1015
In the Menu Navigation Box (top left) you'll see a "Mhz to Khz" button.
Click to activate the calculator and key in the number you want to convert.
The numeric sequence for a multiplier above and below is displayed.
All these numbers refer to the frequency of the Radio / TV signal's carrier wave as the number of oscillations in one second. The Radio / TV program you want is a series of signals super-imposed on the Radio Frequency carrier wave or for Digital signals a series carrier waves each holding part of the encoded audio / visual information.
Each carrier wave acts like a house address, each house has a physical width as does a Radio / TV channel, in Australia we use the PAL(B) TV standard, which has a channel spacing of 7Mhz to the next channel or address. To follow this house address analogy, the occupants you want to see are at frequency X and in room Y at a specified time Z or in other words you might want channel 12 (X), ABC4 (Y) at 7pm (Z) for the NEWS24 service.
Other countries use variations of the PAL standard such as PAL(G) for 8Mhz channel spacing and PAL(M) for 6Mhz spacing; the difference in spacing is only one aspect of these standards and reflects the particular need of radio spectrum use and quality of services to be delivered. There are many other communication standards each with their own merrits and quirks...
73's for now
Gary, VK3KHB