Multi Tone (MT)

Question 1

Expand VFT?

Answer 1

Voice frequency telegraphy

Question 2

What is the definition Orion of multi tone(MT)?

Answer 2

Normally used for digital modems. Multi tone refers to the fact multiple tones can reside in each channel.

Question 3

What is the bandwidth of a VGC voice grade channel?

Answer 3

0Khz - 4Khz

Question 4

Name the three most prevelant forms in MT multi tone ?

Answer 4

Phase shift keying PSK
Frequency shift keying FSK
On off key OOK

Question 5

What is a pilot tone ?

Answer 5

A pilot tone establishes the power and aids in synchronisation of the signal between the tx and rx terminals

Question 6

Tones may be in 3 possible states, name them and explain ?

Answer 6

Active - on and operational

Inactive- when a tone is not sending any data it will rest on a frequency level.

Missing - when a tone is inactive it will be turned off.

Question 7

What is a tone channel spacing ?

Answer 7

The tone channel spacing is determined by measuring from a point on one tone to a like point on an adjacent tone.

Question 8

What is CXSP also referred to as ?

Answer 8

A tone channel spacing (TCS)

Question 9

What is a tunnel channel excursion?

Answer 9

The tone channel excursion is simply the frequency shift of a single tone channel, measured from the low frequency to the high.