GMDSS. FCC Test 49

The purpose of ITU channel spacing is:

To maximize the number of voice & telex channels available.
To make most efficient use of the radio spectrum by using voice channels rather than telex channels.
To make most efficient use of the radio spectrum by using telex channels rather than voice channels.
To minimize the possibility of interference from adjacent channels.

Which statement regarding bandwidth and channel spacing is correct:

The proper sequence of channel spacing from narrow to widest is:

Which statement regarding channel spacing and bandwidth is true?

Voice bandwidth is greater than telex bandwidth and therefore Voice channel spacing values are less than telex channel spacing values.
Telex bandwidth is greater than voice bandwidth and therefore telex channel spacing values are less than voice channel spacing values.
Both telex bandwidth and channel spacing values are greater than voice bandwidth and channel spacing values.
Both telex bandwidth and channel spacing values are less than voice bandwidth and channel spacing values.

What is meant by the term 'ITU channel'?

This refers to an internationally standardized assignment of frequency pairings for common use.
This refers to a vessel's selcall number.
None of the above.
This refers to VHF channels 1-28 and 60-88.

Which of the following defines 'ITU Channel 1216'?

Ch-1216 in the MF band.
Ch-16 in the 12 MHz band.
Ch-12 in the 16 MHz band.
This would indicate the 16th channel in the 12 MHz band, but Ch-1216 does not yet exist as there are currently only 15 possible channels.

ITU channels are:

Review Answers