ozQRP DDS VFO 2, Construction Manual

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DDS VFO 2 Construction Manual – Issue 1 Page 18
7.2 U
SING THE ROTARY ENCODER
In Configuration the rotary encoder has four states:
1. Rotate clockwise. Used to increment values
2. Rotate counter-clockwise. Used to decrement values.
3. Short (less than 1 second) press of the encoder button. Used to toggle between options
or move the cursor to the right.
4. Long (greater than 1 second) press of the encoder button. Used to move to next
configuration menu.
When a configuration menu is exited the selected values are automatically stored in
memory.
7.3 C
ONFIGURATION
P
REVIEW
The configuration parameters are stored in non-volatile memory and recalled at power up.
During configuration the current parameters are displayed as each menu is accessed. By simply
stepping through the menus without making changes the current parameters can be viewed.
7.4 E
NTERING
N
EW
V
ALUES
1. Hold down the encoder button and apply power to the DDS VFO.
2. Wait until the LCD displays Configuration (about 3 seconds) and then release the
button.
3. The Master Clock menu will be displayed. Pressing the encoder button for less than 1
second will toggle through the clock options. Once completed press the encoder button
for longer than 1 second and release.
4. The IF Offset menu will be displayed. Pressing the encoder button for less than 1
second will toggle between Yes and No. Once completed press the encoder button for
longer than 1 second and release. If this option is set to No, the IF Freq High and IF Freq
Low menus will be bypassed.
5. The IF Freq High menu will be displayed and the cursor will be positioned on the
10MHz digit. Rotating the encoder clockwise increments the digit while rotating the
encoder anti-clockwise decrements the digit. Pressing the encoder button for less than 1
second will step the cursor onto the next digit. Once completed press the encoder
button for longer than 1 second and release.
6. The IF Freq Low menu will be displayed and the cursor will be positioned on the
10MHz digit. Rotating the encoder clockwise increments the digit while rotating the
encoder anti-clockwise decrements the digit. Pressing the encoder button for less than 1
second will step the cursor onto the next digit. Once completed press the encoder
button for longer than 1 second and release. If the IF Offset option has been set to Yes
the Frequency menu will be bypassed.
7. The Frequency menu will be displayed and the cursor will be positioned on the 10MHz
digit. Rotating the encoder clockwise increments the digit while rotating the encoder
anti-clockwise decrements the digit. Pressing the encoder button for less than 1 second
will step the cursor onto the next digit. Once completed press the encoder button for
longer than 1 second and release.