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PL560-39OCR Datasheet(PDF) 8 Page - PhaseLink Corporation

Part # PL560-39OCR
Description  Analog Frequency Multiplier
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Manufacturer  PLL [PhaseLink Corporation]
Direct Link  http://www.phaselink.com
Logo PLL - PhaseLink Corporation

PL560-39OCR Datasheet(HTML) 8 Page - PhaseLink Corporation

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Analog Frequency Multiplier
PL560-xx VCXO Family
47745 Fremont Blvd., Fremont, CA 94538 TEL (510) 492-0990, FAX (510) 492-0991
www.phaselink.com
Rev.:02-09-07 Page 8
the amplitude on the scope is maximum and record the generator frequency. For example, the peak is recorded
at 29.8x2 or 59.6 MHz.
Measuring 320 MHz L2X: Connect the RF generator and scope probe as shown in Figure 6, above. While
power is applied to the PCB, set the generator output to +12 dBm and the frequency to 80 MHz. Since this is the
2x port the scope will show 160 MHz with ~ 3V pk-pk amplitude. Vary the generator above and below 80 MHz
until the amplitude on the scope is maximum and record the generator frequency. For example, the peak is
recorded at 78.0 x 2 = 156 MHz
In the AFM Tuning Assistant, add the scope’s probe capacitance to the Cstray cell. For our example 0.5 pF + 1.0
pF = 1.5 pF. With L2X at 24 nH adjust LWB1 (cell B23) until the peak frequency reads 156 MHz. Next replace the
L2X value with 180 nH and see if it peaks at 59.6 MHz. If it does not, adjust Cstray until 59.4 MHz is achieved.
Again enter 24 nH for L2X and fine tune LWB1 for 156 MHz.
Results: LWB1 = 1.6 nH, Cstray = 2.9 pF-0.5 pF = 2.4 pF (subtract scope probe stray capacitance)
Repeat the same steps for the L4X: Set the generator to 80 MHz. The 82 nH peaks at 118 MHz and the 10 nH
peaks at 304 MHz.
Results: LWB1 = 1.8 nH, Cstray = 2.5 pF-0.5 pF = 2.0 pF (subtract scope probe stray capacitance)
Internal Capacitor Selection by Device
Cinternal (pF)
Device Number
2X
4X
P560-0x
7.625
6.250
P560-3x
34.125
16.500
P560-4x
34.125
P560-6x
7.625


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