Tektronix DPO4000 Series, Programmer'S Manual

Page: 140 / 623

Commands Listed in Alphabetical Order
Syntax
CH<x>:LABel <Qstring>
CH<x>:LABel?
Arguments
<Qstring>
is an alphanumeric string of text, enclosed in quotes, that contains the
text label information for the channel <x> waveform. The text string is limited
to 30 characters.
CH<x>:OFFSet
Sets or returns the vertical offset for channel <x>, where x is the channel number.
This command offsets the vertical acquisition window (moves the level at the
vertical center of the acquisition window) for the speci
fi ed channel. Visualize
offset as scrolling the acquisition window towards the top of a large signal for
increased offset values, and scrolling towards the bottom for decreased offset
values. The resolution of the vertical window sets the offset increment for this
control.
Offset adjusts only the vertical center of the acquisition window for channel
waveforms to help determine what data is acquired. The oscilloscope always
displays the input signal minus the offset value.
The channel offset range depends on the vertical scale factor.
Table 2-38: Channel Offset Range
Offset range
V/Div Setting 1 M Ω Input 50 Ω Input
1 mV/div — 50 mV/div ±1 V ±1 V
50.5 mV/div — 99.5 mV/div ±0.5 V ±0.5 V
100 mV/div — 500 mV/div ±10 V ±5 V
505 mV/div — 995 mV/div ±5 V ±5 V
1 V/div — 5 V/div
1
±100 V ±5 V
5.05 V/div — 10 V/div
1
±50 V N/A
1 For 50 Ω input, 1 V/div is the maximum setting.
NOTE. The above table describes oscilloscope behavior only when no probe is
attached, and when the external attenuation factor is 1.0.
Group Vertical
2-126 MSO4000 and DPO4000 Series Programmer Manual