HP 8530A, Руководство по эксплуатации и программированию, Страница: 58 / 439

Principles of Operation
Error Correction
If calibration is ON, the calibration \error coecient" values are used to modify the raw data.
These coecients contain the measurement oset values created during the calibration process .
Convert P arameter
The corrected data for each displayed parameter is modied if the Convert P arameter feature
is active . What is Convert P arameter? T o explain this feature you must rst realize that the HP
8530 can directly ratio any two combinations of its a1, a2, b1, or b2 inputs with one exception.
The b2 input can never be the denominator in a ratio . F or example , a1/b2 is normally
impossible . However , you can select b2/a1 then turn on Convert P arameter . The HP 8530 will
measure b2/a1, then mathematically invert the results .
Time Domain Operations
The data is then sent through the time domain transform if this optional feature is turned ON.
The Delay T able is accessible by computer controller . The delay table allows you to modify
the data to suit special needs . This feature is explained under \Delay T able" in the keyword
dictionary .
Corrected Data Array
The data is now stored in the Corrected Data Array . The corrected data for the active
parameter on the active channel are stored in this array . This data array can be stored to disc ,
or be transferred to or from a computer . If data is transferred from the computer into the
array , later processing steps will be performed on that data.
Memory Arrays
These arrays hold data you have stored to one of the eight trace memories using functions
under the 4 DISPLA Y 5 key . Each parameter on each channel have a specic memory number
assigned to it:
T able 2-1. Memory Numbers for Each P arameter on Each Channel
Channel/P arameter Memory Number
Channel 1
P ARAM 1 Memory #1
P ARAM 2 Memory #2
P ARAM 3 Memory #3
P ARAM 4 Memory #4
Channel 2
P ARAM 1 Memory #5
P ARAM 2 Memory #6
P ARAM 3 Memory #7
P ARAM 4 Memory #8
Trace Math
The next stage is trace math processing. Trace math performs a selected mathematical
operation using normal data as one operand, and memory data as the other .
System Overview 2-7