Amateur radio + typical bandwidth of RTTY, PSK31, FSK

Click For Summary
SUMMARY

The typical bandwidths for amateur radio transmission schemes RTTY, PSK31, and FSK vary significantly. PSK31 operates with a bandwidth of 31.25 Hz, while RTTY and FSK bandwidths can range from hundreds to thousands of Hz, depending on baud rate and frequency shift. Low shift FSK is particularly effective in challenging communication conditions, utilizing shifts of 3 Hz and Morse code speeds that result in very low bandwidths, often resembling continuous carriers to the human ear.

PREREQUISITES
  • Understanding of amateur radio transmission modes
  • Familiarity with baud rate concepts
  • Knowledge of frequency shift techniques
  • Basic principles of Morse code communication
NEXT STEPS
  • Research RTTY baud rate configurations and their impact on bandwidth
  • Explore advanced FSK modulation techniques for improved communication
  • Study the effects of frequency shift on signal clarity in amateur radio
  • Learn about the implementation of PSK31 in various amateur radio setups
USEFUL FOR

Amateur radio operators, communication engineers, and hobbyists interested in digital transmission modes and bandwidth optimization.

JamesGoh
Messages
140
Reaction score
0
Does anyone know what the typical bandwidth of the RTTY, PSK31 and FSK amateur radio transmission schemes are ?
 
Engineering news on Phys.org
PSK31 has a bandwidth of 31.25 Hz.
The others vary according to baud rate and frequency shift but would be much greater than PSK31.
Of the order of hundreds to thousands of Hz.

Very low shift FSK is used to achieve communication in very difficult conditions.
Shifts of 3 Hz and a speed in Morse code of one dot per 3 seconds and one dash per 10 seconds are used. These transmissions have very low bandwidths and sound just like continuous carriers to a human ear.
 

Similar threads

Minimum Tone Spacing: Coherent Frequency Shift Keying
  • · Replies 17 ·
Replies
17
Views
4K
Why does increasing the message bandwidth decrease the FM bandwidth?
  • · Replies 5 ·
Replies
5
Views
2K
Understand the concept of bandwidth
  • · Replies 24 ·
Replies
24
Views
3K
How to measure the bandwidth of a photodetector?
  • · Replies 7 ·
Replies
7
Views
4K
Cellular Spectrum Bandwidth: How Much Space is Needed for a Single Call?
  • · Replies 15 ·
Replies
15
Views
2K
Understanding Bandwidth - What is it & How Does it Relate to Media?
  • · Replies 5 ·
Replies
5
Views
8K
Relationships between bandwidth, Fourier trans & digital modulations
  • · Replies 5 ·
Replies
5
Views
7K
Graduate Project Progress Report and possible Radio Astronomy Technique?
  • · Replies 8 ·
Replies
8
Views
1K
What Is the Importance of the Nyquist Interval in Signal Processing?
  • · Replies 10 ·
Replies
10
Views
3K
Description of a telemetry transmitter
  • · Replies 6 ·
Replies
6
Views
1K