PSK

PSK screen

CWExpert support PSK and QPSK 31,63,125 and 250 modes. Mode selection can be done from main menu or with mouse right click on Monitor window. All changes are “on the fly” without need to restart audio streams. VFOA and VFOB are independent in mode selection and can be combined with others modes (RTTY and CW).

mode selection from main menu mode selection

To change VFOA op mode or filter width tuning mode must be VFOA (yellow vertical bar on Panadapter screen) or OFF.

VFOA tuning mode

To change VFOB op mode first enable RX2 and then enter VFOB tuning mode (double right mouse click until red vertical bar appear). Now you can change op mode or filter width.

VFOB tuning mode

Tuning can be done by mouse wheel when mouse cursor is placed on:
- Panadapter screen in 10Hz steps;
- Panadapter screen + keyboard CTRL in 50Hz;
- placing mouse pointer over VFOA or VFOB labels (color is changed to yellow) in 100Hz steps;
- Monitor screen in 1Hz steps for fine tuning;

VFOA tuning
VFOB tuning

Local oscillator can be changed in 5KHz step by placing mouse pointer over LOSC label (change color from white to yellow color) or with CTRL key from keyboard in 10KHz steps.

LOSC tuning

Monitor window give additional information about CH1 and CH2 state:

PSK monitor

Green CH1 DCD is indication of successful signal detection and number on the right is frequency difference. IF AFC is turned on and difference is within 1Hz VFOA is not corrected.

Split mode allow transmitting on VFOB frequency. VFOA and VFOB modes are independent!

SPLIT mode

If you wish to change channel coming trough speakers press button 2:

CH2 audio selection

From Setup->Modem->PSK you can change received audio frequency and TX preamble (time to send idle characters before actual message, allow relays switch to TX mode).

PSK setup

Goran Radivojevic
18.06.2012