Fluke PM-3390B Check the result of the post processing function, Example Send → TRACe? M21

USING THE COMBISCOPE INSTRUMENTS 3 - 47

3.9.1.4Check the result of the post processing function.

The results of the post processing functions :MATH :TRANsform:FREQuency :TRANsform:HISTogram

are stored in M1_1 for CALCulate1 and in M2_1 for CALCulate2, regardless of the input (feed) trace.

The results of the post processing functions :FILTer:FREQuency :INTegral

:DERivative (or :DIFFerential)

are stored in M1_n or M2_n, depending of the input source. When CHn or Mi_n is the input trace for CALCulate1, the result is placed in M1_n (n = 1, 2, 3, 4). When CHn or Mi_n is the input trace for CALCulate2, the result is placed in M2_n (n = 1, 2, 3, 4).

Example:

Send → CALCulate2:FEED "CH3"

Send → CALCulate2:INTegral:STATe ON

’The result is that the integral of the channel 3 trace is placed in M2_3.

When the result of a calculation is saved in a trace memory location, the other trace locations of the same memory register are used by the calculate process. Data stored in these locations may be destroyed. For example, a CALculate1 process that stores the result in M1_2, may also destroy the contents of M1_1, M1_3, and M1_4. The result of a CALCulate function that is stored in a trace memory can be read into the controller by using the TRACe? query.

Example:
Send → TRACe? M2_1	’Requests for M2_1 trace
Read ← <trace_buffer>	’Reads M2_1 trace

Note: The result of a CALCulate block can be used as source for the other CALCulate block, but not as source for the same CALCulate block.

PROGRAM EXAMPLE:

DIM response AS	STRING * 1033	’Dimensions trace buffer
CALL Send(0, 8,	"CALCulate2:FEED ’CH3’", 1) ’Channel 3 = source CALC2
CALL Send(0, 8, "CALCulate2:TRANsform:FREQuency:WINDow HAMMing", 1)
CALL Send(0, 8,	"CALCulate2:TRANsform:FREQuency:STATe ON", 1)
		’Enables FFT-Hamming
CALL Send(0, 8,	"TRACe? M2_1", 1)	’Requests for M2_1 trace
CALL Receive(0,	8, response$, 256)	’Reads the M2_1 trace