Fluke PM-3390B Channels Memory Registers Standard, PM33x0B 512 +EXT, Extended, Trace formatting

USING THE COMBISCOPE INSTRUMENTS 3 - 57

The following table shows the relation between the trace acquisition length (TRACe:POINts) and the available channel (CHx) and memory traces (Mx).

TRACe:POINts	CHANNELS:		MEMORY REGISTERS:
STANDARD:		(PM33x0B)
512	4	(2+EXT)	M1	.. M8
2K	4	(2+EXT)	M1	.. M2
4K	2	(2)	M1	.. M2
8K	1	(1)	M1	.. M2
EXTENDED:		(PM33x0B)
512	4	(2+EXT)	M1	.. M50
8k	4	(2+EXT)	M1	.. M2
16K	2	(2)	M1	.. M2
32K	1	(1)	M1	.. M2

Examples:

-Standard memory 4K acquisition length allows, for example: CH1 + M1_1 + M2_1 + CH3 + M1_3 + M2_3

-Extended memory 32K acquisition length allows, for example: CH2 + M1_2 + M2_2

Table 3.2 Relation between acquisition length and available trace memory

Note: Delayed Time Base (DTB) acquisition traces are only saved in the CH1 to CH4 memory, when the acquisition length is 512 samples. DTB acquisitions can only be defined via front panel operations.

3.10.1Trace formatting

The FORMat command allows you to format the resolution of trace sample values. The resolution is determined by specifying the number of bits used to code the sample values of all trace acquisitions. Trace samples can be programmed to be formatted as 16 bits (2 bytes) or as 8 bits (1 byte). After a *RST command, the number of trace sample bits is 16 (2 bytes). Notice that the contents of acquisition and register space is not cleared when a different trace format is programmed.

PROGRAM EXAMPLE:

CALL	Send(0,	8,	"*RST",	1)	’Length of trace samples = 16 bits
CALL	Send(0,	8,	"FORMat	INTeger,8", 1)	’Length of trace samples = 8 bits