Tektronix TDS510A Caulking Gun User Manual


 
Command Groups
2–42
TDS Family Oscilloscope Programmer Manual
Table 2–23 below shows the correlation between the number of channels in use
and the waveform record length.
Table 2–23: Extended-Acquisition-Length Mode Channels and Record Lengths
# of Channels in Use Extended Acquisition Length Waveform Record Length
1 of 4
(not on the TDS 520C and 724C)
8 M samples 500 K samples
2 of 4
(or on the TDS 520C and 724C: 1 of 2)
4 M samples 250 K samples
3 or 4 of 4
(or on the TDS 520C and 724C: 2 of 2)
2 M samples 100 K samples
From a software development viewpoint, to define how much of the extended
acquisition length data to include, you can use the DATa:STARt and DATa:STOP
commands.
To define the waveform record within the extended acquisition data, you can use
the HORizontal:RECORDSTART or the HORizontal:POSition command.
The CURVe? query will return the extended acquisition data as you defined it
with DATa:STARt and DATa:STOP. With extended-acquisition-mode set to on,
this can be much larger than the waveform record. With extended-acquisition-
mode set to off, this is equal to the waveform record.
Also, DATa RECORDSNAp will force DATa:STARt and DATA:STOP to become the
boundaries of the waveform record.
Commands related to extended-acquisition-length mode operations include:
CURVe, DATa RECORDSNAp, DATa SOUrce, DATa:STARt, DATa:STOP,
HORizontal:ACQDURATION?, HORizontal:ACQLENGTH, HORizontal:EXTĆ
DACQ, HORizontal:POSition, HORizontal:RECORDSTART, RECAll:ACQDAĆ
TA, SAVe:ACQDATA, and WFMPre:<wfm>?.
NOTE. Extended-acquisition-length mode CURVe? queries can easily return
more data than will fit on a 1.44 Mbyte floppy. For example, to return an entire
8 M extended acquistion mode record in ASCII format can require over
26.8 Mbytes of hard disk space. It can also take over 25 minutes to do this on
some models.