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4 - 114 COMMAND REFERENCE
Description:
Defines the trace length (number of trace points) for all traces. The acquisition
length and the length of all internal traces is programmed to the value specified in
<acquisition_length>. If the <acquisition_length) parameter is omitted, the default
value of 512 is assumed. If the oscilloscope is in the analog mode, error -221
"Settings conflict;Digital mode required" is generated.
Limitations:
For the PM33x0B CombiScope instruments:
- CH3 and Mi_3 is not applicable.
- CH4 is the external trigger view channel, so:
• EXTernal is the alias for CH4.
• Mi_E is the alias for Mi_4.
Coupled values:
There exists a coupling between programming of the sweep time and the number
of trace points (acquisition length). The coupling is one way, i.e., the sweep time
changes if the acquisition length changes.
Example:
The number of trace points is 2048.
- Send
→ SENSe:SWEep:TIME .04
The sweep time becomes 40.9 ms.
- Send
→ TRACe:POINts M1_1,4096
The number of trace points becomes 4096.
- Send
→ SENSe:SWEep:TIME?
The response is 819E-04, which means that the sweep time was doubled to
81.9 milliseconds.
CAUTION: If the acquisition length is programmed to a different value, all
acquisition and register trace memories are cleared. So, all
previously defined traces are lost!
Example:
Send
→ TRACe:POINts CH1,8192 Number of trace points for all
trace memories becomes 8192.
Send
→ TRACe? M2_3 Requests M2_3 trace.
Read
← <block_data> Reads M2_3 trace.
Front panel compliance:
The TRACe:POINts command is the remote equivalent of the front panel ACQ
LENGTH option of the TB MODE menu.