Preliminary Technical Data
EVAL-AD7766/66-1/66-2
Rev. PrB | Page 9 of 24
USING THE EVALUATION SYSTEM
HARDWARE CONNECTIONS
1.
Apply power to the EVAL-CED1Z via +7V, 15W
power supply provided with the EVAL-CED1Z board.
At this stage, the green LED labeled ‘Power’ on the
EVAL-CED1Z should be lighting. This indicates that
the EVAL-CED1Z is receiving power The USB cable
can then be connected between the PC and the EVAL-
CED1Z.
2.
Connect the EVAL-CEDZ and the evaluation board
together via the 96-way connector. The EVAL-
AD7766/-1/-2EDZ board is powered by a 7.5V and -
2.5V external supply.
3.
Connect the USB cable between the PC and the
EVAL-CEDZ. A green LED positioned beside the USB
connector on the EVAL-CEDZ board will light
indicating that the USB connection has been
established.
4.
The EVAL- AD7766EDZ will be detected - proceed
through any dialog boxes that may appear (use the
recommended options), to finalize the installation.
5.
Start the EVAL- AD7766EDZ software.
With the hardware set up, you can now use the software to
control the EVAL-CED1Z and the AD7766/-1/-2 evaluation
board. To launch the software, from the
Analog Devices
menu
click on the
AD7766
submenu, then click on the
AD7766 icon.
Figure 8
displays the main window that opens.
Note: In the case where an Error message appears, click OK and
restart the application after checking the connection between
the adapter board and the USB port on the PC. Also, check that
the USB device is identified by the Device Manager as detailed
in the first time use of EVAL-CED1Z paragraph of Installing the
Software section.
USING THE SOFTWARE
Menu Bar
The menu bar consists of the following menus:
File – Open (Sample Data)
Opens previously saved sample data.
File – Save (Sample Data)
Saves the sample data this is currently displayed.
File – Print Front Panel Picture
Prints the software screen displayed.
File – Save as Picture
Saves the displayed screen plot, i.e. waveform, histogram, FFT.
File – Exit
Closes the software.
Edit – Reinitialize Values to Default
Reinitializes all the controls on the front panel to their default
values.
Help – Open analog.com
Opens the www.analog.com website.
The software that controls the AD7766/-1/-2 evaluation board
through the EVAL-CED1Z has four main sections. As shown in
Figure 8. The top portion of the screen contains the menu bar.
The
Part Information
section is on the left hand side of the
screen. The
Data Capture
is in the centre of the screen each of
which contains a number of sub-tabs.
Part Information Tab
The
Part Information
tab allows the user to select a variety of
configurations
Just underneath the
Part Information
text is the drop down
menu to select the EVAL-CEDZ to operate with the AD7766/-
1/-2 evaluations board. This enables all the required signals that
are to be generated to run the AD7766/-1/-2 device.
Prior to taking samples from the AD7766/-1/-2 device the user
must provide a SYNC/PD pulse to the AD7766/-1/-2 device.
Press the
Sync / Power Down
button so that the AD7766/-1/-2
device is set-up to sample. This process must be followed each
time the EVAL-CEDZ is powered up. Following the SYNC/PD
samples can be acquired from the AD7766/-1/-2 device.
The AD7766/-1/-2 evaluation board runs using a 1.024MHz
MCLK. You can choose the sampling frequency up to this rate
by setting the MCLK frequency on the AD7766/-1/-2 front
panel. Please note though that the MCLK frequency supplied by
the EVAL-CEDZ board is not controlled by the MCLK setting
on the software front panel, it is set constant to 1.024 MHz.
However if an external MCLK signal is applied the MCLK
control on the front panel may be used so that all the frequency
calculations from the results of the samples are scaled correctly.
The frequency of the EVAL-AD7766EDZ crystal oscillator is
1MHz.
The
Part Information
tab also includes a
Busy
status indicator,
which lights when the evaluation board is busy and an
Exit
button to allow the user quit the program.
