Qam Vector Playback With The Dpg2 - Analog Devices AD9789-EBZ Quick Start Manual

Quick Start Guide
Below are the recommended Sum Scale values for all QAM Mapper modes and channel counts.
QAM Sum Scale Value
Mode
1 Channel
DVB 16-QAM 48
DVB 32-QAM 54
DVB 64-QAM 54
DVB 128-QAM 80
DVB 256-QAM 54
DOCSIS 64-QAM 54
DOCSIS 256-QAM 54

QAM Vector Playback with the DPG2

Install the software as described in the Software section, and connect all the required cables as described in the Hardware Setup section.
Turn on the power supply. The current should be approximately 200mA. Turn on the clock source, with a 2.4GHz tone at 2dBm. This
setup will use the LVDS mode, so ensure that jumpers JP9 and JP10 are in their LVDS positions (towards the DPG2 connector).
Open the AD9789 SPI application from your Start Menu (Start > Programs > Analog Devices > AD9789-EBZ > AD9789 SPI). If you have
the SPI controller open from a previous setup, close and re-open it before continuing. Press the Run ( ) button in the upper left. The
current measured by the power supply should jump to approximately 1.0A. Set the spectrum analyzer to center at 843MHz, with a
24MHz span, and 30kHz resolution bandwidth. Four tones should now be visible, at 834MHz, 840MHz, 846MHz, and 852MHz. Click on
the PARMNEW button in the SPI controller. It should turn red. Click Run again. The LOCK indicator in the upper left of the screen
should now be green.
The part is now ready to receive data. Open DPGDownloader on your PC (Start > Programs > Analog
Devices > DPG > DPGDownloader). Under the Evaluation Board drop down list, the AD9789 should
already be selected (if it is not, select it). For the Port Configuration, select LVDS. Once the configuration
download is complete, it should be setup as shown in Figure 7. Now load in the included example vector
of random data by clicking Add Data File. The vector can be found in C:\Program Files\Analog
Devices\HSDAC\AD9789\Random Data.hex.
Once the file has been processed by DPGDownloader, the software must be setup to match the settings in the AD9789. Select 32-Bit for
the Bus Width, 8-bit for the Data Width, and Real for the Data Format. Select the check boxes next to each channel (4 in all). For the Real
Data Vector in Channel 1, select Random Data.hex from the drop down list. Leave the other channels with None as the vector. Figure 8
show the DPGDownloader software configured.
2 Channel 3 Channel
28 22
34 26
34 26
50 38
34 26
34 26
34 26
Table 1
Rev. A | Page 4 of 8
4 Channel
16
20
20
30
20
20
20
AD9789-EBZ
Figure 6
Figure 7