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HSP50215EVAL

DSP Modulator Evaluation Board

Intersil 

HSP50215EVAL

21. ___ Item (5) of the main BOARD INTERFACE submenu

does a full initialization and configuration of all four

channels on the board. Item (5) should be selected

whenever the board has been reset. After that, items

(2), (3) or (4) can be selected for a faster update.

22. ___ Select HARDWARE INTERFACE submenu item (0)

by typing 0 <Enter>. This returns the user to the

MAIN MENU. You have now configured your board

for its first test configuration. You may look at the out-

put with a scope or spectrum analyzer to verify that

the board is operating as desired.

23. ___ If the output is not as expected, review the configura-

tion of all of the channels to be sure that you have

properly selected the stimulus, filtering and configu-

ration.

24. ___ When designing a new configurations or new stimulus,

it is best to begin by editing the example file that most

closely matches the desired signal or configuration.

Learning Your Way Around

This Section provides a step by step walk through of some

exercises to familiarize the user with the software screens

and the techniques used to generate a variety of stimulus

and configurations of the HSP50215EVAL Board. If the DAC

output is routed to a scope or a spectrum analyzer, then a

visual verification can be made of the configuration changes.

Note that these exercises assume that the concluding

configuration of the previous exercise is the configuration of

the board at the start of the next exercise. The first exercise

configures all channels to ensure success.

Exercise #1: Generating A CW Tone

This exercise will demonstrate the creation of a CW test

tone. The purpose of this exercise is to illustrate the

generation of a signal that is useful in a variety of testing

configurations.

Go to the main menu. Select Item (5), Load Configuration

File, and enter the following file name and path:

examples/ex01qpsk <Enter). Select Item (1), Modulator

Channel 1 Configuration, and enter the following

parameters:

(1)500,000Hz

(2)50,000Hz

(3)QASK

(7)Stimulus\bpskpn (See note below before leaving this item).

Note: If you have not properly identified the stimulus file or the path to

that file, then the program will not download when you command the

software to configure the board, and will return you to the DOS prompt

at which point you will need to restart the control software and start

from scratch on the configuration.

(8)1

(9)3

(0)Returns to main menu

This configures channel one input stimulus to be a single bit,

sampled at 50kHz, and applied to a 500kHz QASK modulator

with 3dB attenuation. The filter has a data span of 16 samples

and 16 interpolation phases, and is referenced by the filter

filename IS136B. Notice that it was setting item (8) to 1 that

repeatedly sent a single bit to the modulator, creating the CW.

Select main menu item (2) and set the following parameters:

(1)250,000Hz

(2)25,000Hz

(3)QASK

(7)Stimulus\bpskpn (See note below before entering this item)

Note: If you have not properly identified the stimulus file or the path to

that file, then the program will not download when you command the

software to configure the board, and will return you to the DOS prompt

at which point you will need to restart the control software and start

from scratch on the configuration.

(8)511

(9)48

(0)Returns to main menu

This configures channel two to be a 25Kbps PSK modulator

at 250kHz, but with the RF severely attenuated so as to be

effectively turned off. The IS136B filter is used here, as well

as in Channel 1.

Select main menu item (3) and set the following parameters:

(1)750,000Hz

(2)75,000Hz

(3)QASK

(7)Stimulus\bpskpn (See note below before leaving this item).

Note: If you have not properly identified the stimulus file or the path to

that file, then the program will not download when you command the

software to configure the board, and will return you to the DOS prompt

at which point you will need to restart the control software and start

from scratch on the configuration.

(8)511

(9)48

(0)Returns to main menu

This configures channel three to be a 75Kbps PSK

modulator at 750kHz, but with the RF severely attenuated so

as to be effectively turned off. Once again, the IS136B filter

is used.

Select Item (4) and set the following parameters:

(1)500,000Hz

(2)501,000Hz

(3)QASK

(5)0

(6)4

(7)Stimulus\gn16k (See note below before leaving this item)

Note: If you have not properly identified the stimulus file or the path to

that file, then the program will not download when you command the

software to configure the board, and will return you to the DOS prompt

at which point you will need to restart the control software and start

from scratch on the configuration.

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