Sundance SMT911 - Manual (Page 18)

SMT911 User Manual SMT911 Page 18 of 38 Last Edited: 01/06/2010 10:09:00
D3: MAXIM channel A good LO clock lock
D4: MAXIM channel B good LO clock lock
D5: DDR2 memory initialized successfully
D6: Good clock lock from both AD9863 IC‟s to the FPGA PLL
To step through a simple capture from the module, press „1‟ to turn on the receiver.
Next press „5‟ to store a number of samples to the DDR2 memory of the FPGA base
module, and finally „6‟ to read the memory from the base module into a set of files
in „C:\SMT911 Data\Received Data\‟ called: „RxA_I.log‟, „RxA_Q.log‟, „RxB_I.log‟ and
„RxB_Q.log‟. The number of samples to be stored to file is changeable at the top of
the header file in the DSP task as:
#define DATALENGTH
(30*1024)
Keep in mind if more samples are attempted to be written to file than is stored in
memory, the server will halt and the application will need to be restarted.
The user is then free to analyze the data with their preferred application, or the
provided MATLAB script „Test_RX.m‟ can then be used to view the captured
waveforms.
To adjust the gain, monitor RSSI, or select a different carrier frequency, simply
choose the corresponding menu option and follow the directions as presented on
screen. To quit the application, press „9‟.