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EXAMPLE EQUIPMENT LIST
The AD9747 Evaluation Board connects to the Analog Devices Digital Pattern Generator (DPG2, PN: ADI HSC-DAC-DPG-BZ; or DPG3, PN: AD –DPG3) or System Demonstration Platform (SDP-H1, PN: EVAL-SDP-CH1Z) to allow for quick evaluation of the AD9747. The DPG2 or SDP-H1 allows the user to create many types of digital vectors and transmit these at speed to the AD9747 in any of the AD9747 operating modes. The AD9747 evaluation board is configured over USB from a panel within the DPGDownloader software. (Note: The AD9747 operation is described in detail. The operation of the other devices in the family is described in a later section.)
The AD9747 application software, DPGDownloader, should be installed on the PC prior connecting the hardware to the PC. The DAC Software Suite is included on the Evaluation Board CD, or can be downloaded from the DPG web site at http://www.analog.com/dpg. This will install DPGDownloader required for loading vectors into the DPG2 and configuring the AD9747 evaluation board.
Once the DPGDownloader software is installed, the hardware can be connected . A single 5V power supply powers the evaluation board. The power supply should be able to source up to 1A to cover all the board’s operating conditions. A low jitter clock source (< 0.5psec RMS) should be used for the DACCLK. A sinusoidal clock output level of 0 to 4dBm is optimal. By default, the DAC outputs are connected to SMA connectors for evaluation. Both DAC outputs are available. Later in the document, the modifications for observing the modulator output and different clocking options will be shown.
The PC connects to both the DPG2 and the evaluation board through USB cables as shown in Figure 1 and Figure 2
The PC connects to both the SDP-H1 and the evaluation board through USB cables as shown in Figure 3 and Figure 4.
(Note: The AD-DAC-FMC-ADP adapter board allows AD974x-DPG2-EBZ DAC Evaluation Boards to be used on SDP-H1 with a FMC connector.) Figure 1. DPG2 and AD9747 Evaluation Board Bench set-up Figure 2. DPG2 and AD9747 Evaluation Board Figure 3. SDP-H1 and AD9747 Evaluation Board Bench set-up Figure 4. SDP-H1 and AD9747 Evaluation Board
It is suggested that the basic set-up is verified before making any modifications to the evaluation board. Connect the equipment to the AD9747 evaluation board per the following table:
Power up the DPG and connect the USB cable to the PC. Next, run the DPGDownloader Software. A shortcut will be installed to your Start menu during the installation of the DAC Software Suite. To begin, click on the DPGDownloader shortcut in your Programs menu, typically at Start > Programs > Analog Devices > DPG > DPGDownloader. The basic parts of the DPGDownloader window are; Hardware Config Panel, EVB Config, Vector Generation Pull-Down Menu, Vector Palette, Vector Selection Panel and the Download and Play buttons. Figure 5. DPGDownloader Window
The evaluation boards for the AD9743/AD9745/AD9746/AD9747 are identical except for the DUT installed. The operation of the eval boards is also the same except for the vector generation “DAC Resolution” field and the Data Width fields as shown below. These fields should be configured to match the DUT.
By default, solder jumpers JP4, JP5, JP6, and JP7 configure the DAC outputs to be observed at SMA outputs J5 and J9. This jumper setting is shown in Figure 6a). To connect the DAC outputs to the LPF and the ADL537x analog quadrature modulator, the solder jumpers need to be repositioned as shown in Figure 6b). The modulator output can be observed thru the SMA connector J6 (MODULATED OUTPUT). The modulator LO input can be sourced thru SMA connector J10 (LOCAL OSC INPUT). The clock level into the modulator should be set to about 3dBm.
Figure 6a) DAC Output Configuration Figure 6b) Modulator Output Configuration
There are 6 pin jumpers on the evaluation board corresponding to the 6 supplies on the board. They serve as ‘switches’ that determine if the on board LDOs or external supplies are used for each individual supply. They are shunted by default, which means on board LDOs are used. When an external supply is necessary, pull off the shunt from the corresponding supply and connect the external supply to the SMA test points close to the jumper.