VFO operation


The Kachina transceiver maintains two internal VFO registers, one associated with transmit and the other receive.  These may be controlled in sync or separately.  This program takes a little different approach to the control of these registers.  Rather than two separate and distinctly controllable frequency displays a single one is used which can be transfered to, swapped with and used in conjunction with (split mode) the second VFO.  The primary VFO (A) is controlled via a set of keyboard mapped switches which double as display digits:



The least significant digit is in Hertz and the most significant digit is 10's of Megahertz.  Each digit is separately controlled by mouse clicks on the upper and lower half of the digit to be modified.  They can also be controlled via the keyboard up/down right/left arrow keys.  The active digit is distinguished by the highlighted "Select" color.  The up/down arrow keys will cause that digit to move up and down in value.  The lef/rightt arrow keys will move the active digit one to the left or right respectively.  Rotation is full circle so you can move from the msb to lsb by a left arrow depression.  This is the widget (interface control) that always receives keyboard focus after any other operation by the operator.  You can use the arrow keys so long as the Kachina program is the active application.  If you have more than one application running at a time simply click on the Kachina dialog to restore the arrow key functionality.

The three buttons to the right of the VFO readout have an association with both VFO-A and the Frequency/Mode pick list to their right:



The top button transfers the current VFO-A and Mode selections to the pick list.
The middle button clears the currently highlighted list entry.
The lower button clears the entire list.

Clicking on any pick list entry transfers that pair to the VFO-A and Mode selection controls.

The values in this control are saved and opened using the menu "Files/Save" and "Files/Open" respectively.  You can have as many lists of favorites as you desire.  Each are saved in their own file.  So, you may for example, have a voice SSB list, a digital modes list, etc.

The second VFO, VFO-B:



is accessed by the three buttons to its left.  VFO-B stores both frequency and mode (but the mode is not shown).  The A/B switch simply swaps the active VFO-A / mode with the inactive one VFO-B.  The A->B switch transfers the current VFO-A to the VFO-B register.  The Split button allows the transceiver to transmit on VFO-B and receive on VFO-A.  In this mode the receive VFO can still be adjusted, but will not affect the transmit frequency setting.  When Split is selected the annunciator will be lit bright yellow on the Split button.  When operating Split VFO's the transmit and receive mode is governed by the mode selector combo box.