Tektronix MSO2024B Programmer's Manual page 418

Appendix B: Waveform Data in MSO/DPO2000B and MSO/DPO2000 Series Instruments
FilterVu Controls for the
Displayed Waveform
B-4 MSO2000B, DPO2000B, MSO2000 and DPO2000 Series Oscilloscopes Programmer Manual
reduced resolution waveform. The filtering frequency of the full resolution
waveform is not under your direct control. It is a function of the horizontal
and acquisition settings and the selected FilterVu frequency. The 3 dB cutoff
frequency for this filtering may be different for the LRL record and the thumbnail
record. The actual filter frequency applied to the acquired (LRL) and displayed
(thumbnail) waveforms are available in the waveform preamble:
WFMOutpre:FILTERFreq?
This query returns the 3 dB low pass filter cutoff frequency for:
The acquired (LRL) waveform when the
The displayed (thumbnail) waveform when the
to .
REDUced
When waveforms are sent to the instrument using the
from ISF files, the filtering frequency is obtained from the waveform preamble:
WFMInpre:FILTERFreq
This command sets the 3 dB low pass filter cutoff frequency for the waveform
being transferred to the instrument's reference waveform memory.
Only resolution waveforms may be sent to the instrument for storage and
FULL
display in reference waveform memory.
The filtering of reduced resolution waveforms is controlled using the
FILTERVu:FREQuency
on the instrument bandwidth and the horizontal settings (scale and record
length) and may be queried for the last acquired waveform, (as specified by the
DATa:SOUrce command) using the
This query returns a comma separated list of available FilterVu frequencies in
decreasing order for the last acquired source waveform . For example, on a
100 MHz bandwidth instrument at a full resolution record length of 1 M points
and a horizontal scale of 20 microseconds per division, the query returns these
values which apply to the reduced resolution (displayed) waveform: 100000000,
75000000, 42000000, 21000000, 11000000, 5500000, and 2200000.
The low pass filter frequency in effect can be queried using the
FILTERVu:FREQuency? query.
The FilterVu feature can be turned on or off using the
and the display intensity of the glitch capture waveform can be controlled using
the DISplay:INTENSITy:GLITch
DATa:RESOlution
command. The available low pass frequencies depends
FILTERVu:FREQuency:AVAILable?
command.
is set to
FULL
DATa:RESOlution is set
CURVe command or recalled
query.
DISplay:GLITch command
.