Memory Math F’unctions

Two trace math operations are implemented:

(Note that normalization is .~~~~~~ not ‘~~~~-~..) Memory traces are saved and recalled

.i ;.: ..:. TT .:. ;:+<.. ./

and trace math is done immediately after error-correction. This means that any data processing done after error-correction, including parameter conversion, time domain transformation (Option OlO), scaling, etc, can be performed on the memory trace. You can also use trace math as a simple means of error-correction, although that is not its main purpose.

All data processing operations that occur after trace math, except smoothing and gating, are identical for the data trace and the memory trace. If smoothing or gating is on when a memory trace is saved, this state is maintained regardless of the data trace smoothing or gating status. If a memory trace is saved with dating or smoothing on, these features can be turned on or off in the memory-onlydisplay mode.

The actual memory for storing a memory trace is allocated only as needed. The memory trace is cleared on instrument preset, power on, or instrument state recall.

If sweep mode or sweep range is different between the data and memory traces, trace math is allowed, and no warning message is displayed. If the number of points in the two traces is different, the memory trace is not displayed nor resealed. However, if the number of points for the data trace is changed back to the number of points in the memory, the memory trace can then be displayed.

If trace math or display memory is requested and no memory trace exists, the message CAUTION: NO VALID MEMORY TRACE is displayed.

Setting Display Intensity

” ,. _ .,.,. . .,.. . . . . :..:. .

‘Ib adjust the intensity of the display, press IJ@%I@X~ and rotate the front panel knob, use ,A/...........: ;..;.i,.:,.............. .i.~~~~ /.. ...;::...ii.

the &) @) keys, or use the numerical keypad to set the intensity value between 50 and 100 percent. Lowering the intensity may prolong the life of the LCD.

6 4 6 Application and Operation Concepts

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HP 8753E manual Memory Math F’unctions, Setting Display Intensity, Two trace math operations are implemented