Analog Devices ADF4108 Evaluation Board EV-ADF4108EB1Z EV-ADF4108EB1Z Hoja De Datos
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EV-ADF4108EB1Z
Evaluation Board User Guide
UG-160
Rev. B | Page 7 of 16
EVALUATION AND TEST
To evaluate and test the performance of the
, use the
following procedure:
1. Install the Analog Devices Int-N software (see the
1. Install the Analog Devices Int-N software (see the
user guide, PLL Software Installation Guide).
2. Use
values if a different loop filter is required.
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.
hardware driver installation procedure that appears.
6. Connect a reference signal to REFIN.
7. Connect a spectrum analyzer to EXT_VCOOUT or VCO/2.
8. Run the Int-N software.
7. Connect a spectrum analyzer to EXT_VCOOUT or VCO/2.
8. Run the Int-N software.
device in the
Select Device and Connection tab of the main window of
the evaluation board software.
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
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
, 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.
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.
09145-
019
R&S FSUP 26 Signal Source Analyzer
LOCKED
Settings
Residual Noise [T1 w/o spurs]
Phase Detector +0 dB
Signal Frequency:
6.400000 GHz
Int PHN (1.0 k .. 30.0 M) –40.5 dBc
Signal Level:
–4.73 dBm
Residual PM
0.768 °
Cross Corr Mode
Harmonic 1
Residual FM
1.86 kHz
Internal Ref Tuned
Internal Phase Det
RMS Jitter
0.3334 ps
Phase Noise [dBc/Hz]
Marker 1 [T1]
Marker 2 [T1]
RF Atten
5 dB
10 kHz
100 kHz
Top –70 dBc/Hz
–82.78 dBc/Hz
–111.06 dBc/Hz
–17 0
–16 0
–15 0
–14 0
–13 0
–12 0
–11 0
–10 0
–9 0
–8 0
10kHz
100kHz
1MHz
10MHz
1kHz
30MHz
–170
–160
–150
–140
–130
–120
–110
–100
–90
–80
LoopBW
S pu r P ow e r (dBc )
1 CLRWR
SMTH 1%
SMTH 1%
2 CLRWR
EXT
SPR OFF
TH 0dB
TH 0dB
FREQUENCY OFFSET
1
2
Figure 5. Spectrum Analyzer Display