PACTOR III

General Information

Pactor-III mode is a proprietary standard developed by SCS GmbH & Co. KG, Hanau, Germany.      
It is an advancement of the Pactor-I and Pactor-II modes.

Usage:

§ ARQ and broadcast data communication over HF.

Mode Details

 

Item

Value

Standard

Modulation

DBPSK,DQPSK

 

Number of channels

2 / 6 /14 /16 / 18

 

Channel spacing (Hz)

120

 

Bandwidth (Hz)

max 2200

 

Symbol rate (Bd)

100 per channel

 

Coding

Convolutional FEC code

Demodulator Settings

Demodulator

Pactor III

 

Min. burst length (s)

0.300

 

Max. burst length (s)

3.400

 

Min. pause length (s)

0.035

 

Min. burst SNR (dB)

0

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 165: PACTOR III

Figure 57: PACTOR III Spectrogram