Deleted Figure 13 To Figure 16; Changes To Evaluation And Test Section And Figure 5; Evaluation And Test; Added Windows Xp Driver Installation Guide Section And Figure 10 To Figure 14 - Analog Devices UG-160 User Manual

Evaluation Board User Guide

EVALUATION AND TEST

To evaluate and test the performance of the ADF4108, use the
following procedure:
1. Install the Analog Devices Int-N software (see the
user guide, PLL Software Installation Guide).
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.
Signal Frequency:
Signal Level:
Cross Corr Mode
Internal Ref Tuned
Phase Noise [dBc/Hz]
RF Atten
Top –70 dBc/Hz
LoopBW
–80
–90
–100
–110
1 CLRWR
SMTH 1%
2 CLRWR
–120
–130
–140
–150
–160
–170
1kHz
UG-476
R&S FSUP 26 Signal Source Analyzer
Settings Residual Noise [T1 w/o spurs]
6.400000 GHz Int PHN (1.0 k .. 30.0 M) –40.5 dBc
–4.73 dBm Residual PM
Harmonic 1 Residual FM
Internal Phase Det RMS Jitter
Marker 1 [T1]
5 dB 10 kHz
–82.78 dBc/Hz
1
10kHz 100kHz
FREQUENCY OFFSET
Figure 5. Spectrum Analyzer Display
Rev. B | Page 7 of 16
9. Select the USB board and the
Select Device and Connection tab of the main window of
the evaluation board software.
10. In the Main Controls tab in the main window of the
evaluation board software, set the VCO center frequency in
the RF VCO Output Frequency text box (the example in
Figure 5 uses a 6.4 GHz VCO). Set the PFD Frequency text
box as specified in ADIsimPLL, and program the Reference
Frequency value to equal the reference connected to the
REFIN SMA Connector (or the TCXO). See Figure 6 for
the suggested setup.
11. Measure the output spectrum. Figure 5 shows 6.4 GHz
phase noise output.
0.768 °
1.86 kHz
0.3334 ps
Marker 2 [T1]
100 kHz
–111.06 dBc/Hz
2
1MHz
ADF4108 device in the
LOCKED
Phase Detector +0 dB
Spur Pow er (dBc)
–80
–90
–10 0
–11 0
–12 0
–13 0
EXT
–14 0
–15 0
SPR OFF
–16 0 TH 0dB
–17 0
10MHz 30MHz
UG-160