Datasheet

UG-405 Evaluation Board User Guide
Rev. 0 | Page 6 of 20
The Main Controls tab controls the PLL settings (see Figure 5).
Use the Reference Frequency text box to set the correct
reference frequency and the reference frequency divider. The
default reference on the software window is at 100 MHz.
Use the RF Settings section to control the output frequency.
You can type the desired output frequency in the RF VCO
Output Frequency text box (in MHz).
The Settings section lets you select general options available for
the PLL, including the charge pump current settings and phase
detector polarity. The EV-ADF41020EB1Z uses a charge pump
setting of 2.5 mA and a negative phase detector polarity.
In the Registers tab, you can manually input the desired value
to be written to the registers.
In the Sweep and Hop tab, you can make the device sweep a
range of frequencies or hop between two set frequencies.
In the Latches/Registers section at the bottom of the window,
the values to be written to each register are displayed. If the
background on the text box is green, the value displayed is
different from the value actually on the device. Click Write R
Counter Latch or Write N Counter Latch to write that value
to the device. To update all latches in the correct order, click
Write all Latches.
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Figure 5. Software Front Panel Display—Main Controls