Agilent Technologies 35670A Manual page 760

Dynamic signal analyzer gpib programming

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Table of Contents

Example Programs

Comments for GETCAP

Declare an array equal to or larger than the largest time capture we expect to read. It is

convenient to use 1024 for one dimension of the array because the analyzer always captures data

in 1024 point blocks.

Determine if this program is running in the analyzer or an external controller and set the

analyzer address accordingly.

Assign path for formatted communication with the analyzer.

Assign path for binary communication with the analyzer.

Setup the analyzer to output a 100 HZ, 2 Vpk sine wave and capture 10 records of time

Tell the analyzer to send and receive 64 bit/point (8 byte/point) data blocks.

Send the query asking the analyzer to send the channel 1 time capture data.

Enter the definite block header (a pound sign, the number of characters in the byte count,

and the byte count).

Convert the byte count to number of points and then calculate the number of records. There

are 8 bytes/point and 1024 bytes/record.

Redimension the Y data array so that it is the same size as the data we will receive.

Enter the Y data using the unformatted path.

Enter the block termination character.

Square the Y data using the matrix dot operator.

Calculate the maximum absolute value of the Y data and set the time-capture channel 1

range value to the maximum. This will maximize the dynamic range.

Calculate the number of bytes we will send to the analyzer.

Convert the byte value to a string. We have to use the OUTPUT statement because VAL$

would create a string with exponential notation for large values of Bytes.

Calculate the length of the Bytes$ string.

Output the mnemonic to send time-capture data and the definite-length block header (# symbol,

number of characters in the byte count, and the byte count).

Output the data block to the analyzer using the unformatted path.

Output an END to the analyzer to end the data block.