User Manual

Command Descriptions

Arguments

<NR3> is the ver

tical scale factor, in Y UNits (usually volts) per sample value.

Returns

A query result of zero has special meaning. A zero indicates the waveform has

unknown vertical scaling. This is possible in the TDS200, TDS1000, TDS2000,

TDS1000B, TDS2000B, or TDS2000C Series. The TPS2000 Series will never

return zero.

An example of unknown vertical scaling is a math waveform of CH1+CH2

where CH1 vertical scaling is different from CH2 vertical scaling. In this case,

WFMPre:YUNit? returns U. (Does not apply to the TPS2000 Series.)

WFMPre:<wfm>:YMUlt

Same as WFMPre:YMUlt, 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:YOFf

YOFf is a value, expressed in digitizer levels, used to convert waveform record

values to YUNit values using the following formula (where dl is digitizer levels):

value_in_YUNits = ((curve_in_dl - YOFF_in_dl) * YMUlt) + YZERO_in_YUNits

The set form of this command stores a value for the reference waveform speciﬁed

by the DATa:DESTination command. This value does not affect how the

oscilloscope displays the waveform, but does affect the cursor readouts.

The q uery form returns a value for the waveform speciﬁed by the DATa:SOUrce

command, in digitizer levels, if that waveform is active o r 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:YOFf <NR3>

WFMPre:YOFf?

Arguments

<NR3> is a value expressed in digitizing levels.

2-192 TDS200, TDS1000/2000, TDS1000B/2000B, TDS2000C, TPS2000 Programmer