PSK31

General Information

PSK31 is a modem type developed by radio amateurs. PSK31 emissions are very narrow-band and robust against fading effects.

Usage:

§ Transfer of textual information over HF.

Mode Details

 

Item

Value

Standard

Modulation

DBPSK,QPSK

 

Bandwidth (Hz)

50

 

Symbol rate (Bd)

31.25  (62.5 / 125)

 

Coding (FEC variants)

Convolutional FEC

Demodulator Settings

Demodulator

DPSK 2,4,8,16 A/B

 

Symbol rate (Bd)

31

 

SR tolerance (Bd)

5

 

Modulation order

2

 

Version

A

Features

Demodulation

yes

 

Recognition

yes

 

Decoding

yes

 

Automatic Polarity Adjustment

no

 

Combination with other modems (modem list)

yes

Tuning

The tuning frequency is the center of the signal

Table 183: PSK31

Figure 63: PSK31 Spectrogram