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Evaluation Board User Guide
UG-002
One Technology Way • P.O . Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
Evaluating the AD9551 Multiservice Clock Generator
FEATURES GENERAL DESCRIPTION
Simple power connection using USB connection and This user guide describes the hardware and software of the
on-board LDO voltage regulators AD9551 evaluation board and includes detailed schematics and
LDOs are easily bypassed for power measureme
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UG-002 Evaluation Board User Guide TABLE OF CONTENTS Features .............................................................................................. 1 Using an SPI Port ..........................................................................5 General Description ......................................................................... 1 Using Dip Switches (Manual Control) .......................................5 Digital Picture of the Evaluation Board ...........................
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Evaluation Board User Guide UG-002 EVALUATION BOARD HARDWARE The following instructions are for setting up the physical SETTING UP THE SIGNAL CONNECTIONS connections to the AD9551 evaluation board. After setting up the power and PC connections, use the following procedure to set up the signal connections: SETTING UP THE POWER AND PC CONNECTIONS Set up the power and PC connections as follows: 1. Connect a signal generator to REF A SMA Connector J1. 1. Install the AD9551 evaluation sof
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UG-002 Evaluation Board User Guide EVALUATION BOARD SOFTWARE The instructions included in this section are for setting up the 4. If the evaluation board was not found, a dialog box appears AD9551 evaluation board software. that allows you to select an evaluation board to use while the software runs in standalone mode. Standalone mode is INSTALLING THE SOFTWARE useful for viewing and generating register setup files. Do not connect the evaluation board until the software 5. If you connec
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Evaluation Board User Guide UG-002 GUIDE TO PROGRAMMING THE AD9551 5. Set the amplitude and frequency. An amplitude setting of The AD9551 can be programmed via an SPI port or by setting 6 dBm is sufficient. Set the frequency to 622.08 MHz. the logic levels on the frequency select pins of the device. To program the device using the serial port, the evaluation board 6. To connect a signal to REF B, connect the signal to SMA software must be installed. Connector J2. For pin programming, t
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UG-002 Evaluation Board User Guide SOFTWARE OPERATION The main window of the AD9551 evaluation board software is When a subsection window closes after clicking OK, you may comprised of subsections that correspond to the major functional notice that the LOAD button on the main window starts blocks of the AD9551 (see Figure 4). These subsections, most of blinking. This indicates that there are settings that have not which have their own window, are outlined in this section. From been loaded
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Evaluation Board User Guide UG-002 MENU BAR OF MAIN WINDOW File Menu The File menu allows you to load a previously saved AD9551 setup file or to save a new AD9551 setup file. A setup file (.STP) is a text file that contains the AD9551 register setup file, plus any evaluation board settings. To load a previously saved setup file, select Load Setup from the File menu. Note that you must still perform a VCO calibration. Alternatively, to save a new setup file, select Save Setup from the
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UG-002 Evaluation Board User Guide BUTTON BAR OF MAIN WINDOW The buttons described in this section provide easy access to common features. Load and Save Clicking Load and Save allows you to load and save an AD9551 setup file. A setup file (.STP) is a text file that contains the AD9551 register setup file, plus any evaluation board settings. Update Clicking Update toggles the I/O update bit (Register 0x05, Bit 0) of the AD9551. Reset Clicking Reset resets the evaluation board and res
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Evaluation Board User Guide UG-002 DLL Window PFD and Charge Pump Window Clicking Click for Details in the DLL box of the main window Clicking Click for Details in the PFD & Charge Pump box of accesses the DLL window (see Figure 11). This window can be the main window accesses the PFD and Charge Pump window used to manually override the automatic time alignment between (see Figure 13). the REF A and REF B clock input signals to the PLL1 phase detector. Figure 11. DLL Window Input P
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UG-002 Evaluation Board User Guide Feedback Window OutSel Pin: Box Clicking Click for Details in the Feedback Divider box of the The OutSel Pin: drop-down box (see Figure 18) in the main main window accesses the Feedback window, which allows you window controls the logic level on the OUTSEL pin of the to change the feedback divider settings (see Figure 15). AD9551. However, this value can be overwritten by using the SPI control register. Figure 18. OutSel Pin Box (in Main Window) USING
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Evaluation Board User Guide UG-002 7. The Calculator window, shown in Figure 21, appears. 5. The Enable Control? window, shown in Figure 23, appears. Figure 23. AD9551 Serial Port Programming Warning 6. Click Yes to enable serial port register programming. 7. The Calculator window, shown in Figure 24, appears. Figure 21. Calculator Window 8. Type 122.88 into the Ref A Base Frequency: box and 122.88 into the Output 1 Base Frequency: box. 9. Click Calculate Settings, and then click
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UG-002 Evaluation Board User Guide Figure 25. Register Debug Window Figure 26. Input PLL + DCXO Window 11. Bit 3 of Register 0x17 must be set to 1 to enable the PLL locked pin as a test port. By default, the 26 MHz crystal frequency is present at the output. 12. The ac signal has a dc offset of approximately 1.6 V. Be aware that some test equipment has a limit of 0 V dc; therefore, a dc block must be used in such cases. SETTING THE 19.44 MHz MODE The following instructions can be
