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3.3 SCANNING
A binary subprogram called =HH is used to send a command string to the HP 3421A and return a series
of readings, such as 30 readings from one channel or 7 readings from consecutive channels. This permits
faster scanning than would be possible with individual commands in a FOF
...
HEH:
loop. The
syntax for this subprogram call is as follows:
SCAN
HLL
SCAMS command string, vector, index, #readings, errorcode
The parameters are as follows:
command string - A string expression containing a command for the HP 3421A.
vector - The vector (one-dimensional array) into which the numbers from the HP 342 1A are placed. The
vector should be large enough to accommodate all the readings received from the instrument.
index - The index of the vector element to receive the first number returned from the HP 3421A.
Subsequent numbers received from the HP 3421A are placed into the next vector elements.
#readings - The number of readings to be stored in the vector.
errorcode - Returns 0 if there were no errors, or the number of the error generated.
3-18
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