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3 - 56 USING THE COMBISCOPE INSTRUMENTS
3.10 Trace Memory
The trace memory of the CombiScopes instruments consists of space for channel
acquisition traces (CH1 to CH4) and memory register traces (M1 to M8 and M9 to
M50 extended). The amount of acquisition and register space depends on the
following:
•
Whether the CombiScope instrument is equipped with standard or with
extended memory.
•
The specified acquisition length (number of trace samples) with the
TRACe:POINts command.
Example:
Send → TRACe:POINts CH1,8192
This command specifies an acquisition length of 8192 samples for all traces.
Notes: - Only the following trace acquisition lengths can be programmed:
512, 2024 (2K), 4096 (4K), 8192 (8K), 16384 (16K), or 32768 (32K)
- If a different acquisition length is programmed, the contents of all
acquisition and register space is cleared. So, all previously stored
traces are lost!
- After a
*
RST command, the number of trace samples is 512.
- The resulting traces of the post processing functions are always
stored in memory register 1 for CALCulate1 functions and in
memory register 2 for CALCulate2 functions.
Note: CH3 and CH4 cannot be selected as the source for the PM33x0B
CombiScope instruments. Instead the external channel can be selected,
e.g., M1_E.
SENSe
CH 1
CH 2
CH 3
CH 4
TRACe
M1_1
M1_2
M1_3
M1_4
M2_1
M2_2
M2_3
M2_4
M3_1
M3_2
M3_3
M3_4
M50_1
M50_2
M50_3
M50_4
ST7163
Note: For standard memory, 8 memory registers are available (M1 to M8).
For extended memory, 50 memory registers are available (M1 to M50).
Figure 3.20 Trace memory control