User Manual

Command Descriptions
WFMPre:<wfm>
:YOFf
Same as WFMPre:YOFf, except that <wfm> specifies the source/destination
waveform instead of DATa:SOUrce and DATa:DESTINATION.
For set commands, if <wfm> is not a reference waveform, the oscilloscope
generates error 2241.
WFMPre:YUNit
For all model and firmware combinations except the TDS200 Series with a
TDS2CMA communications module or a TDS2MM measurement module, the set
form of this command sets the vertical units for the reference w aveform specified
by DATa:DESTination.
NOTE. You can set a combination of WFMPre:XUNit and WFMPre:YUNit for a
reference waveform that is i
nconsistent (for example, seconds with dB or Hertz
with volts). The oscilloscope will not warn you of this condition. The oscilloscope
uses WFMPre:XUNit to determine whether the waveform is a YT or an FFT.
For TDS200 oscilloscopes used with a TDS2CMA communications or a TDS2MM
measurement module, the set form is ignored. Refer to the WFMPre:YMUlt
command for equivalent functionality.
The query form returns the vertical units of the waveform specified by the
DATa:SOUrce command, if that waveform is active or displayed. If that
waveform is not active or displayed, the query fails and the oscilloscope generates
an execution error with event code 2244 (waveform requested is not active).
Group
Waveform
Syntax
WFMPre:YUNit <Qstring>
WFMPre:YUNit?
Arguments
<Qstring> is "Volts", "U", or "dB".
The TDS1000B, TDS2000B, TDS2000C, and TPS2000 Series have the following
additional arguments:
"A" for amperes
"VA" for volt×amperes
"AA" for amperes×amperes
"VV" for volts×volts
TDS200, TDS1000/2000, TDS1000B/2000B, TDS2000C, TPS2000 Programmer 2-193