MDO3000 Programmer Manual.pdf - 第264页

Commands Listed in A lphabetical Order Group V ertical Syntax CH<x>:SCAle <NR3> CH<x>:SCAle? Related Commands CH<x>:OFFSet , CH<x>:POSition , REF<x>:VER T ical:SCAle , MA TH[1]:VER Tic…

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Commands Listed in Alphabetical Order
CH<x>:PRObe:
SIGnal
This command specifies the input bypass setting of a TekVPI probe attached to
channel <x>, where x is the channel number. The probe must support input bypass,
for example T
CP0001. This command is ignored if sent to an unsupported probe.
Group
Vertical
Syntax
CH<x>:PRObe:SIGnal {BYPass|PASS}
CH<x>:PRObe:SIGnal?
Arguments
BYPass sets the probe to Bypass mode.
PASS sets the probe to Pass mode.
CH<x>:PRObe:UNIts? (Query Only)
Returns a string describing the units of measure for the probe attached to channel
<x>, where x is the channel number.
NOTE. Use the command CH<x>:YUNits to set the probe type to “Voltage”
or “Current”.
Group
Vertical
Syntax
CH<x>:PRObe:UNIts?
Examples
CH4:PROBE:UNITS? might return :CH4:P ROBE:UNITS "V" indicating that the
units of measure for the probe attached to channel 4 are volts.
CH<x>:SCAle
This command specifies the vertical scaleforthechannelspecifiedby<x>,where
x is the channel number. This setting controls the vertical size of the acquisition
window as well as the display scale. The range and resolution of scale values
depends on the probe attached and any other external factors you have specified.
For a signal with constant amplitude, increasing the scale causes the waveform to
be displayed smaller. Decreasing the scale causes the waveform to be displayed
larger.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-233
Commands Listed in Alphabetical Order
Group
Vertical
Syntax
CH<x>:SCAle <NR3>
CH<x>:SCAle?
Related Commands
CH<x>:OFFSet, CH<x>:POSition, REF<x>:VERTical:SCAle,
MATH[1]:VERTical:SCAle
Arguments
<NR3> is a floating point number that specifies the vertical channel scale in
units-per-division. The value entered here is truncated to three significant digits.
Examples
CH4:SCALE 100E-03 sets the channel 4 scale to 100 mV per division.
CH2:SCALE? might return :CH2:S CALE 1.0000 indicating that the current scale
setting of channel 2 is 1 V per division.
CH<x>:TERmination
Sets the connected-disconnected status of a 50 Ω resistor (or 75 Ω with
MDO3000 models) which may be connected between the specified channel's
coupled input and oscilloscope ground. The channel is specified by <x>. There is
also a corresponding query that requests the termination parameter and translates
this enumeration into one of the two float values.
NOTE. 75 Ω termination is not available on the MDO3104 or MDO3102 models.
Group
Vertical
Syntax
CH<x>:TERmination {FIFty|MEG|<NR3>}
CH<x>:TERmination?
Arguments
FIFty sets the channel <x> input resistance to 50 Ω.
MEG sets the channel <x> input resistance to 1 MΩ.
<NR3> is a floating point number that specifies the channel <x> input resistance
numerically.
Examples
CH4:TERMINATION 50.0E+0 establishes 50 Ω impedance on channel 1.
CH2:TERMINATION? might return :CH2:TERMIN ATION 50.0E+0 indicating
that channel 2 is set to 50 Ω impedance.
2-234 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
CH<x>:YUNits
This command specifies the vertical units for the channel specified by <x>,
where x is the channel number. String arguments are case insensitive and any
unsupported
units will generate an error.
Supported units are:
%, /Hz, A, A/
A, A/V, A/W, A/dB, A/s, AA, AW, AdB, As, B, Hz, IRE, S/s, V,
V/A, V/V, V/W, V/dB, V/s, VV, VW, VdB, volts, Vs, W, W/A, W/V, W/W, W/dB,
W/s,WA,WV,WW,WdB,Ws,dB,dB/A,dB/V,dB/W,dB/dB,dBA,dBV,dBW,
dBdB, day, degrees, div, hr, min, ohms, percent, s
The vertical units affect the “Probe Type” that is shown in the “Probe Setup”menu:
Setting CH<x>:YUNits to “V” causes the probe type to be displayed as
“Voltage”.
When CH1:AMSVIAVOLTs:ENAble is set to OFF, setting CH<x>:YUNits to
“A” causes the probe type to be displayed as “Current”.
Setting CH<x>:YUNits to anything else causes the probe type not to be
displayed (neither “Voltage” nor “Current” are highlighted).
Group
Vertical
Syntax
CH<x>:YUNits <QString>
CH<x>:YUNits?
Arguments
QString is a string of text surrounded by quotes, specifying the supported units.
Examples
CH4:YUN “V” causes the probe type to be displayed as “Voltage”.
CLEARMenu (No Query Form)
Clears the current menu from the display. This command is equivalent to pressing
the front panel Menu off.
Group
Miscellaneous
Syntax
CLEARMenu
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-235