MDO3000 Programmer Manual.pdf - 第254页
Commands Listed in A lphabetical Order T able 2-52: Cha nnel Offset Range Offset range V/Div Setting 1 M Ω Input 50 Ω Inp ut 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 …
Commands Listed in Alphabetical Order
Syntax
CH<x>:INVert {
ON|OFF}
CH<x>:INVert?
Arguments
OFF sets the invert function for channel <x> to off.
ON sets the invert function for channel <x> to on.
Examples
CH4:INVert ON inverts the waveform on channel 4.
CH2:INVert? might return :
CH2:INVERT 0
indicating that channel 2 is not
inverted.
CH<x>:LABel
This command specifies the waveform label for channel <x>, where x is the
channel number (1–4).
Group
Vertical
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
This command specifies the vertical offset for channel <x>, where x is the channel
number (1–4).
This command offsets the vertical acquisition window (moves the level at the
vertical center of the acquisition window) for the specified channel. Visualize
offset as scrolling the acquisition window towards the top of a large signalfor
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 acquis
ition 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.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-223
Commands Listed in Alphabetical Order
Table 2-52: Cha
nnel Offset Range
Offset range
V/Div Setting 1 MΩ Input 50 Ω Inp ut
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
1V/div—5V/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
Syntax
CH<x>:OFFSet <NR3>
CH<x>:OFFSet?
Related Commands
CH<x>:POSition
Arguments
<NR3> is a floating point number that specifies the offset value for the specified
channel <x>.
Examples
CH3:OFFSet 2.0E-3 sets the offset for channel 3 to 2 mV.
CH4:OFFSet? might return :CH4 :OFFSET 1.00 00E-03 indicating that the
offset for channel 4 is set to 1 mV.
CH<x>:POSition
This co
mmand specifies the vertical position of channel <x>, where x is the
channel number (1–4). The position value is applied to the signal before it is
digitized.
Increasing the position value of a waveform causes the waveform to move up.
Decreasing the position value causes the waveform to move down. The position
value determines the vertical graticule coordinate at which input signal values,
minus the present offset setting for that channel, are displayed. For example,
2-224 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
if the position
for Channel 3 is set to 2.0 and the offset is set to 3.0, then input
signals equal to 3.0 units are displayed 2.0 divisions above the center of the screen
(at 1 V/div).
Group
Vertical
Syntax
CH<x>:POSition <NR3>
CH<x>:POSition?
Related Commands
CH<x>:OFFSet, REF<x>:VERTical:POSition, MATH[1]:VERTical:POSition
Arguments
<NR3> is a floating point number that specifies the position value for channel <x>,
in divisions, from the center graticule. The range is 8 to -8 divisions.
Examples
CH2:POSition 1.3 positions the Channel 2 input signal 1.3 divisions above the
center graticule.
CH1:POSition? might return : CH1:POSITION -1.3000 indicating that the
current position of Channel 1 is 1.3 divisions below the center graticule.
CH<x>:PRObe? (Query Only)
Returns all information concerning the probe attached to channel <x>, where x
is the channel number.
Group
Vertical
Syntax
CH<x>:PRObe?
CH<x>:PRObe:AUTOZero (No Query Form)
This command executes the attached probe’s Auto Zero function, for probes that
support this feature. See your probe documentation for more details.
Group
Vertical
Syntax
CH<x>:PRObe:AUTOZero EXECute
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-225