MDO3000 Programmer Manual.pdf - 第85页
Command Groups T able 2-37: RF Commands (cont.) Item Description RF:POSition This command speci fi es the vertical position for the fr equency domain traces. The vertical position is the location of the Reference Level wi…
Command Groups
Table 2-37: RF Commands (cont.)
Item Description
RF:MEASUre:ACPR:LA3DB?
This query measures a ratio between the third lower s ide channel and the Main channel when
performing ACPR measurements using a frequency domain trace. T he power in the adjacent
channel is equivalent to the power in the mai n c hannel (dBm) added to the power ratio (dB) of
the adjacent channel. (The RF measurement type must be set to ACPR using the command
RF:MEASUre:TYPe.)
RF:MEASUre:ACPR:POWer? This query returns the m easure of the total RF power in the Main channel when performing
ACPR measurements using a frequency domain trace. It uses the units that have been
selected with the command RF:UNIts.
RF:MEASUre:ACPR:UA1DB? This query measures a ratio between the first upper side channel and the Main channel when
performing ACPR measurements using a frequency domain trace. T he power in the adjacent
channel is equivalent to the power in the mai n c hannel (dBm) added to the power ratio (dB) of
the adjacent channel. (The RF measurement type must be set to ACPR using the command
RF:MEASUre:TYPe.)
RF:MEASUre:ACPR:UA2DB?
This query measures a ratio between the second upper side channel and the Main channel
when performing ACPR measurements using a frequency domain trace. The power in the
adjacent channel is equivalent to the power in the m ain channel (dBm) added to the power
ratio (dB) of the adjacent channel. (The RF measurement type must be set to ACPR using
the command RF:MEASUre:TYPe.)
RF:MEASUre:ACPR:UA3DB?
This query measures a ratio between the third upper side channel and the Main channel
when performing ACPR measurements using a frequency domain trace. The power in the
adjacent channel is equivalent to the power in the m ain channel (dBm) added to the power
ratio (dB) of the adjacent channel. (The RF measurement type must be set to ACPR using
the command RF:MEASUre:TYPe.)
RF:MEASUre:CP:CHANBW This command specifies the c hannel bandwidth to use when the RF measurement type has
been set to Channel Power (CP) using the command RF:MEASUre:TYPe.
RF:MEASUre:CP:POWer?
This query returns the total channel power within the displayed channel bandwidth, when the
RF measurement type has been set to CP (using the command RF:MEASUre:TYPe).
RF:MEASUre:OBW:CHANBW This command specifies the Analysis Bandwidth to use, when the measurement type has been
set to OBW (using the command RF:MEASUre:TYPe). Note that the span automatically
increases or decreases to be 10% more than the Analysis Bandwidth (providing some room
around the signal of interest).
RF:MEASUre:OBW:LOWERFreq? This query returns the lower frequency threshold (on the display, the white line to the left
bracketing OBW power). The RF measurement type must be set to OBW using the command
RF:MEASUre:TYPe.
RF:MEASUre:OBW:
PERCENTdown
This command specifies the percentage of total power within the Analysis Bandwidth (the OB W
power) s uch that half of the remaining power will be below the OBW:LOWERFreq level and the
other half of the remaining power will be above the O BW:UPPERFreq level.
RF:MEASUre:OBW:POWer?
This query returns the total channel power within the occupied bandwidth, when the RF
measurement type has been set to OBW (using the command RF:MEASUre:TYP e).
RF:MEASUre:OBW:UPPERFreq? This query returns the upper frequency threshhold (on the d isplay, the white line to the right
bracketing OBW power). The RF measurement type must be set to OBW using the command
RF:MEASUre:TYPe.
RF:MEASUre:TYPe This command specifies the RF measurement type: Channel Power, Adjacent Channel Power
Ratio, Occupied B andwidth, or none.
2-54 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Command Groups
Table 2-37: RF Commands (cont.)
Item Description
RF:POSition This command specifies the vertical position for the frequency domain traces. The vertical
position is the location of the Reference Level with respect to the top of the graticule, in
divisions. T he lower limit is –10 divisions. The upper limit is +10 divisions.
RF:PRObe:AUTOZero This command executes the attached probe’s AutoZero function, for probes that support
this feature.
RF:PRObe:CALibrate This command executes a c alibration or initialization for a probe attached to the RF input, if
the probe is calibratable.
RF:PRObe:CALibrate:
CALIBRATABLe?
This query returns a boolean value that indicates whether the attached probe is calibratable.
RF:PRObe:CALibrate:STATE? This command returns the calibration state of the probe connected to the RF input.
RF:PRObe:COMMAND This command sets the state of the probe control speci fied with the first argument to the
state specified with the second argument.
RF:PRObe:DEG AUss This command starts a degauss/AutoZero cycle on a TekVPI current probe attached to the
RF input.
RF:PRObe:DEGAUss:STATE? This command returns the state of the probe degauss for the RF input.
RF:PRObe:FORCEDRange This command specifies the range of a TekVPI probe attached to the RF input.
RF:PRObe:GAIN This command specifies the scale factor for the probe attached to the RF input.
RF:PRObe:ID:SERnumber? This query returns the serial number of the probe attached to the RF input.
RF:PRObe:ID:TYPe? This query returns the type of probe attached to the RF input.
RF:PRObe:PREAmp:MO De Sets o r returns the user selected mode for an RF pre-amp connected to the RF input. BYPass
or AUTO
RF:PRObe:PREAmp:STATus? Returns the actual state of the RF pre-amp connected to the RF input. NONe, ON,orBYPass
RF:PRObe:RESistance? This query returns the input resistance of the probe attached to the RF input, if the probe
supports it (otherwise, it returns 0.0). The RF input is 50 Ω impedance.
RF:PRObe:SIGnal This command specifies the input bypass setting of a TekVPI probe attached to the RF input.
The probe must support input bypass.
RF:PRObe:UN Its? This query returns a quoted string that describes the units of measure for the probe attached
to the RF input.
RF:RBW
This command specifies the resolution bandwidth (RBW) setting when the RBW mode has
been set to MANUAL (using the command RF:R BW:MODe). The resolution bandwidth is the
width of the narrowest measurable band of frequencies in a frequency domain trace. T he RBW
is adjustable down to 20Hz. By default, the RBW tracks the span value in a 1000:1 ratio.
RF:RBW:MODe This command specifies the resolution bandwidth (RBW) m ode, either automatic or manual.
RF:REFLevel
This command sets the Reference Level of the RF input. The Reference Level can e ither be
specified as a numeric floating point value, or set automatically.
RF:RF_AMPlitude:LABel
This command specifies the label for the RF Amplitude vs. Time trace.
RF:RF_AMPlitude:VERTical:
POSition
This command specifies the vertical position of the RF Amplitude vs. Time trace. The position
value determines the vertical graticule location at which the trace is displayed. Increasing the
position value of a waveform causes the waveform to move up. Decreasing the position value
causes the waveform to move down. The m in imum is -50 divisions and the maximum is
50 divisions with a resolution of 0.02 divisions.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-55
Command Groups
Table 2-37: RF Commands (cont.)
Item Description
RF:RF_AMPlitude:VERTical:
SCAle
This command specifies the vertical scale for the RF Amplitude vs. Time trace. 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.
RF:RF_AVErage:COUNt? This query returns the number of RF traces that have been accumulated to create a n RF
Average frequency domain trace.
RF:RF_AVErage:NUMAVg
This command specifies the number of acquisitions to be used when creating an RF Average
frequency domain trace, which displays the average of values from multiple acquisitions at
each trace point. The default is 16. The range is 2 – 512, in exponential increments.
RF:RF_FREQuency:LABel This command speci fies the label for the RF Frequency vs. Time trace.
RF:RF_FREQuency:VERTical:
POSition
This command specifies the vertical position for the RF Frequency vs. Time trace. The position
value determines the vertical graticule location at which the trace is displayed. Increasing the
position value of a waveform causes the w aveform to move up. Decreasing the position value
causes the waveform to move down. The minimum is -50 divisions and the m aximum is
50 divisions with a resolution of 0 .02 divisions.
RF:RF_FREQuency:VERTical:
SCAle
This command speci fies the vertical scale for the RF Frequency vs. Time trace. 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.
RF:RF_PHASe:LABel This command specifies the label for the RF Phase vs. Time trace.
RF:RF_PHASe:REFERence:
DEGrees
Sets or returns the phase, in degrees, at the trigger point for the RF_PHA Se time domain trace.
RF:RF_PHASe:VERTical:POSition This command specifies the vertical position for RF Phase vs. Time trace. The position value
determines the vertical graticule location at which the trace is displayed. Increasing the position
value of a waveform causes the waveform to m ove up. Decreasing the position value causes
the waveform to move down. The minimum is -50 divisions and the maximum is 50 divisions
with a resolution of 0.02 divisions.
RF:RF_PHASe:VERTical:SCAle This command specifies the vertical scale for RF Phase vs. Time trace. For a signal with
constant amplitude, increasing the scale causes the w aveform to be displayed smaller.
Decreasing the scale causes the waveform to be displayed larger.
RF:RF_PHASe:WRAP:DEGrees Sets or returns the number of degrees to wrap the RF_PHASe time domain trace.
RF:RF_PHASe:WRAP:STATE Sets or returns the state of the phase w rap control for the RF_PHASE time domain trace.
RF:RF_V_TIMe:BANDWidth
Sets or returns the RF versus time bandwidth as an NR3 value in Hz.
RF:SCAle This command specifies the overall vertical scale setting of the frequency domain w indow.
The lower limit is 0.1 dB/division. The upper limit is 100dB/division. The vertical scale is
adjustable in a 1–2–5 sequence.
RF:SPAN This command speci fies the span setting. The span is the range of frequencies that can be
observed around the center frequency. This is the width of the frequency domain trace, which
is equal to the stop frequency minus the start frequency. The span maximum varies according
to the oscilloscope model; e ither 3GHz or 6G Hz.
RF:SPANRbwratio This command specifies the ratio of the span to the resolution bandwidth (RBW) that will be
used when the RBW Mode is set to AUTO. (In order to set the RB W Mode to AUTO, use the
command RF:RBW:MODe.)
RF:SPECTRogram Clears the spectrogram.
2-56 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual