AOR AR2300 Specifications download pdf (Page 54)

3. DATA FORMAT

1) Sampling Rate: 1.125Msample/Sec

2) USB: 72Mbit/sec., Isochronous (USB2.0)

3) Data Format:

Fix Point(2’s compliment)

I: = (29..0): 30bits

Q:= (29..0): 30bits

USB data Stream One Sample = (16bitsWord x4)

MSB LSB

I-High(29..15) 15bits 1 1

Word

I-Low (14..0) 15bits 0 2

Word

Q-High(29..15) 15bits 0 3

Word

Q-Low(14..0) 15bits 0 4

Word

4 )USB Interface: ENDPOINT 6

5) USB driver for Windows XP/VISTA/7

4.USB DRIVER INSTALLATION

To install the driver, the following files are required.

AORAlpha.sys AR-ALPHA USB Client Driver

It will be copied in the Windows directory system32¥drivers”

AORAlpha.inf AR-ALPHA USB client driver inf file

AORAlphaDD.h IoControl type / Structure / Includes the files that defines GUID etc…

5.NOTE FOR PC SOFTWARE DESIGN

To read the I/Q data, the client driver needs to be interfaced for data acquisition.

The data acquisition is easily accomplished by a simple setup. The test program “AR-ALPHA

TestAPP”, written by C++ can be supplied by AOR. (Sample code is supplied with this software.)

5.1 Get the device path

The supplied client driver needs to obtain the device using SetupDiXXX() API functions before

opening driver by CreateFile() API. This is because the driver interface uses GUID for the

application.

Following is an example to get the device.

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AOR AR2300 Specifications Page 54