MDO3000 Programmer Manual.pdf - 第589页

Commands Listed in Alphabetical Order Related Commands RF:MEASUre:CP :POW er? Arguments <NR3> is a floating point number . Examples RF:MEASUre:CP :CHANBW 5.0000E+6 sets th e c hannel width to 5 MHz. RF:MEASUre:CP:PO…

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Commands Listed in Alphabetical Order
RF:MEASUre:A
CPR:UA3DB? (Query Only)
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 po
wer in the adjacent channel is equivalent to the power in the main
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.)
Conditions
MDO3000, MDO4000/B, or MDO4000C models with option SA3 or SA6 only.
Group
RF
Syntax
RF:MEASUre:ACPR:UA3DB?
Related Commands
RF:MEASUre:ACPR:ADJACENTPAIRs, RF:MEASUre:ACPR:CHANBW,
RF:MEASUre:ACPR:CHANSPACing, RF:MEASUre:ACPR:POWer?,
RF:MEASUre:ACPR:LA1DB?, RF:MEASUre:ACPR:LA2DB?,
RF:MEASUre:ACPR:LA3DB?, RF:MEASUre:ACPR:UA1DB?,
RF:MEASUre:ACPR:UA2DB?
Examples
RF:MEASUre:ACPR:UA3DB might return –30.000, indicating that the Upper Area
3 side channel (on the right side of the Main channel) has 1/1000 the power of
the Main channel.
RF:MEASUre:CP:CHANBW
This command specifies the channel bandwidth to use when the RF measurement
type has been set to Channel Power (CP) using the command RF:MEASUre:TYPe.
The channel bandwidth is centered about the CF (center frequency).
Note that the span is automatically controlled to be 10% wider than the chann
el
width. The span maximum varies according to the oscilloscope model; either
3GHz or 6GHz.
Conditions
MDO3000, MDO4000/B, or MDO4000C models with option SA3 or SA6 only.
Group
RF
Syntax
RF:MEASUre:CP:CHANBW <NR3>
RF:MEASUre:CP:CHANBW?
2-558 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
Related Commands
RF:MEASUre:CP
:POWer?
Arguments
<NR3> is a floating point number.
Examples
RF:MEASUre:CP:CHANBW 5.0000E+6 sets the channel width to 5 MHz.
RF:MEASUre:CP:POWer? (Query Only)
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).
Group
RF
Syntax
RF:MEASUre:CP:POWer?
Related Commands
RF:MEASUre:CP:CHANBW
Examples
RF:MEASure:CP:POWer? might return 5.23 in whatever units have been selected
using
RF:UNIts.
RF:MEASUre:OBW:CHANBW
This command specifies the Analysis Bandwidth to use, when the RF 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).
Conditions
MDO3000, MDO4000/B, or MDO4000C models with option SA3 or SA6 only.
Group
RF
Syntax
RF:MEASUre:OBW:CHANBW <NR3>
RF:MEASUre:OBW:CHANBW?
Related Commands
RF:MEASUre:OBW:POWer?, RF:MEASUre:OBW:PERCENTdown,
RF:MEASUre:OBW:LOWERFreq?, RF:MEASUre:OBW:UPPERFreq?
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-559
Commands Listed in Alphabetical Order
RF:MEASUre:O
BW:LOWERFreq? (Query Only)
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 com
mand RF:MEASUre:TYPe.
Conditions
MDO3000, MDO4000/B, or MDO4000C models with option SA3 or SA6 only.
Group
RF
Syntax
RF:MEASUre:OBW:LOWERFreq?
Related Commands
RF:MEASUre:OBW:CHANBW, RF:MEASUre:OBW:POWer?,
RF:MEASUre:OBW:PERCENTdown, RF:MEASUre:OBW:UPPERFreq?
Examples
RF:MEASUre:OBW:LOWERFreq? might return 2.6000E+9, indicating that the
lower frequency threshold is 2.6000E+9 Hz. If
OBW:PERCENTdown is 80%, then
(100
%-80%)/2 or 10% of the total power will be above 2.6000E+9 Hz.
RF:MEASUre:OBW:PERCENTdown
This command specifies the percentage of total power within the Analysis
Bandwidth (the OBW power) such 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 OBW:UPPERFreq level.
Thevaluecanbesetfrom99.9downto60.0in0.1increments. TheRF
measurement type must be set to OBW using the command RF:MEASUre:TYPe.
Conditions
MDO3000, MDO4000/B, or MDO4000C models with option SA3 or SA6 only.
Group
RF
Syntax
RF:MEASUre:OBW:PERCENTdown <NR3>
RF:MEASUre:OBW:PERCENTdown?
Related Commands
RF:MEASUre:OBW:CHANBW, RF:MEASUre:OBW:POWer?,
RF:MEASUre:OBW:LOWERFreq?, RF:MEASUre:OBW:UPPERFreq?
Arguments
<NR3> is a floating point number.
2-560 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual