Analog Devices EV-ADF4108EBIZ User Manual page 10

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EVALUATION AND TEST
To evaluate and test the performance of the ADF4108, use the
following steps:
1. Install the Analog Devices Int-N software
2. Use ADIsimPLL to generate the loop filter component
values if a different loop filter is required.
3. Solder new filter components specified by ADIsimPLL.
4. Install the USB software drivers. Connect the evaluation
board to a PC using the supplied USB cable. Follow the
hardware driver installation procedure that appears.
5. Connect the USB connector to the EV-ADF4108EB1Z.
6. Connect a Reference signal to REFIN.
7. Connect a spectrum analyzer to EXT_VCOOUT OR
VCO/2.
8. Run the Int-N software.
9. Select the USB board and the
Select Device and Connection tab of the software front
panel window.
10. On the Main Controls tab, set the VCO center frequency
(Figure 19 uses a 7.5 GHz VCO). Set the PFD frequency as
specified in ADIsimPLL, and program the Reference
frequency to match Reference connected to SMA
Connector REFIN (or the TCXO). See Figure 20 for the
suggested setup.
11. Measure the output spectrum. Figure 19 shows a 7.5 GHz
output.
Figure 19. Spectrum Analyzer Display
Rev. A | Page 10 of 20
Evaluation Board User Guide
ADF4108 device in the