Digiscope Display

Psk Mode

The digiscope display just to the right of the waterfall displays signal quality in various formats.  The display for PSK modes is the vector scope:

The display with no signal or below squelch level.  If the SQL is off this display will be random vectors driven by noise.

The display with a normal psk31 signal.  The vector flips between 0 and 6 o'clock.  

AFC off and receive carrier set below the center of the received signal

AFC off and receive carrier set above the center of the received signal.

You can see the effect of mistuning by slewing the carrier carrier control moving from low to high over the signal .  You must do this with AFC off.  Engage the AFC and the vectors will immediately snap to vertical positions.

The effect is the same with QPSK signals except you will see 4 vectors that are 90 degrees from each other.

Digiscope Display - MFSK Menu