Evaluation Board User Guide
UG-435
Rev. 0 | Page 11 of 20
EVALUATION AND TEST
To evaluate and test the performance of the
ADF4351
, use the
following procedure:
1.
Install ADF435x software.
2.
Connect the evaluation board to a PC using the supplied
USB cable. Follow the hardware driver installation
procedure that appears.
3.
Connect spectrum analyzer to Connector RF
OUT
A+.
4.
Connect 50 Ω termination to RF
OUT
A−.
5.
Run the ADF435x software.
6.
Select the USB board and the
ADF4351
device in the
Select Device and Connection
tab of the software front
panel window.
7.
In the software window, click
Write All Registers
. See
Figure 19 for the suggested setup.
8.
Measure the output spectrum. Figure 20 shows a
phase noise plot at 2.5 GHz output.
9.
Different combinations of reference and PFD frequency
may require changes to the REFIN stage or PFD frequency.
Low output frequencies may require different output stage
elements.
Figure 20. Spectrum Analyzer Display
Figure 21. Typical Evaluation Setup
10844-
020
SPECTRUM
ANALYZER
PC
EXTERNAL DC
SUPPLY
EXTERNAL DC
GND
TCXO
ADF4351
LOOP
FILTER
LOCK DETECT LED
USB
POWER
LED
PLL
POWER
LED
USB
POWER
SWITCH
EXTERNAL
POWER
SWITCH
USB CRYSTAL
AND PROCESSOR
50Ω
TERMINATION
REFERENCE IN/
REFERENCE OUT
REFERENCE (OPTIONAL)
10844-
000
Содержание UG-435
Страница 13: ...Evaluation Board User Guide UG 435 Rev 0 Page 13 of 20 Figure 23 Evaluation Board Schematic Page 2 10844 023...
Страница 14: ...UG 435 Evaluation Board User Guide Rev 0 Page 14 of 20 Figure 24 Evaluation Board Schematic Page 3 10844 024...
Страница 18: ...UG 435 Evaluation Board User Guide Rev 0 Page 18 of 20 NOTES...
Страница 19: ...Evaluation Board User Guide UG 435 Rev 0 Page 19 of 20 NOTES...
