UG-369
Evaluation Board User Guide
Rev. A | Page 10 of 24
Use the
Frequency
text box in the
Reference
section to set the
correct reference frequency. The default reference on the
software window is at 25 MHz and matches the frequency of the
TCXO present on the board.
Use the
VCO Output Frequency
section to control the output
frequency. To achieve single-tone on the VCO output, type the
desired output frequency in the
Activate f1
text box (in mega-
hertz) and ensure that
Stop
is selected in the
Dynamic
section
under
VCO Output Frequency
. Selecting the
Alternate
option
causes the frequency on the VCO output to switch between the
Activate f1
and
Activate f2
values. The delay time between
frequency switches is controlled by the
Approximate Delay
option. The third option of the
Dynamic
section,
Sweep
, allows
the output frequency to constantly change with the frequency
step set by
Channel Spacing
, starting from
Activate f1
until it
reaches
Activate f2
. After the
Active f2
frequency is reached,
the sweep is repeated.
Some register settings may need to be set manually. Click the
Register 1
to
Register 5
buttons to open the register settings
windows, as shown in Figure 18.
Click the
REGISTERS
button to display the binary and
hexadecimal values for all registers, as shown in Figure 19.
When a new register setting value is entered (see Figure 18),
the relevant
Update Rx
(where x = 0 to 5) button becomes red,
indicating that it must be clicked to program the part with the
new value. Clicking the
Update ALL
button programs all
register values simultaneously.
Click the
OK
button to confirm the new value in the
Register x
Settings
(where x = 1, 2, 3, or 5) window (see Figure 18). Click
Update Rx
to program the part with the new value. The new
value is retained in the
Register x Settings
window if it is
opened again.
If the value entered is outside of the range specified in the
data sheet, an error message appears and the field is
automatically updated to the lowest or highest value within the
allowed range. Some limits are changed dynamically based on
the values of other registers; that is, the highest allowed value
for
Phase
in the
Register 1 Settings
window depends on the
current value of the modulus (
MOD
in the
Settings
section),
which is calculated based on the data from the
Reference
section and the
Channel Spacing
field (under the
VCO Output
Frequency
section).
Click the
Cancel
button to abandon a register value change, and
the new value is not retained in the
Register x Settings
window
if it is opened again.
10
482
-01
8
Figure 18. Register Settings Windows for Register 1, Register 2, Register 3, and Register 5
Содержание EVAL-ADF4151EB1Z
Страница 17: ...Evaluation Board User Guide UG 369 Rev A Page 17 of 24 10482 026 Figure 26 Layer 1 Component Side ...
Страница 18: ...UG 369 Evaluation Board User Guide Rev A Page 18 of 24 10482 027 Figure 27 Layer 2 Ground Plane ...
Страница 19: ...Evaluation Board User Guide UG 369 Rev A Page 19 of 24 10482 028 Figure 28 Layer 3 Power Plane ...
Страница 20: ...UG 369 Evaluation Board User Guide Rev A Page 20 of 24 10482 029 Figure 29 Layer 4 Solder Side ...
Страница 23: ...Evaluation Board User Guide UG 369 Rev A Page 23 of 24 NOTES ...
