MDO3000 Programmer Manual.pdf - 第583页

Commands Listed in Alphabetical Order RF:MEASUre:AC PR:LA3DB? , RF:MEASUre:ACPR:UA1DB? , RF:MEASUre:ACPR:UA2DB? , RF:MEASUre:ACPR:UA3DB? Arguments <NR3> is a floating point number . Examples RF:MEASUre:AC PR:CHANBW …

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Commands Listed in Alphabetical Order
Group
RF
Syntax
RF:MEASUre:ACPR:ADJACENTPAIRs[1|2|3]
RF:MEASUre:ACPR:ADJACENTPAIRs?
Related Commands
RF:MEASUre:TYPe, 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?,
RF:MEASUre:ACPR:UA3DB?
Examples
RF:MEASUre:ACPR:ADJACENTPAIRs 2 sets the number of adjacent pairs to
use to 2.
RF:MEASUre:ACPR:ADJACENTPAIRs? might return 3, indicating the number of
adjacent pairs has been set to 3.
RF:MEASUre:ACPR:CHANBW
This command configures the measurement bandwidth to use for the Main
channel, as well as the adjacent side channels, when performing ACPR
measurements using a frequency domain trace. The RF measurement type must
first be set to ACPR using the command
RFMEASUre:TYPe ACPR.
Note that adjusting the channel bandwidth automatically adjusts the channel
spacing. If the bandwidth is adjusted to be wider than the channel spacing, the
oscilloscope will automatically increase the channel spacing and the span.
NOTE. The oscilloscope will maintain the span to fit all the channels on-screen,
plus a margin of 10% (5% on either side.)
Conditions
MDO3000, MDO4000/B, or MDO4000C models with option SA3 or SA6 only.
Group
RF
Syntax
RF:MEASUre:ACPR:CHANBW <NR3>
RF:MEASUre:ACPR:CHANBW?
Related Commands
RF:MEASUre:TYPe, RF:MEASUre:ACPR:ADJACENTPAIRs,RF:
MEASUre:ACPR:CHANSPACing, RF:MEASUre:ACPR:POWer?,
RF:MEASUre:ACPR:LA1DB?, RF:MEASUre:ACPR:LA2DB?,
2-552 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
RF:MEASUre:AC
PR:LA3DB?, RF:MEASUre:ACPR:UA1DB?,
RF:MEASUre:ACPR:UA2DB?, RF:MEASUre:ACPR:UA3DB?
Arguments
<NR3> is a floating point number.
Examples
RF:MEASUre:ACPR:CHANBW 1.5E+6 sets the width to use for Main and side
channels to 1.5 MHz.
RF:MEASUre:ACPR:CHANBW? might return 4.0000E+6, indicating the ACPR
Mainandsidechannelwidthissetto4MHz.
RF:MEASUre:ACPR:CHANSPACing
This command specifies the center-to-center spacing between the Main channel
and adjacent channels when performing ACPR measurements using a frequency
domain trace. (The RF measurement type must be set to ACPR using the
command RF:MEASUre:TYPe.) Note that if the channel spacing is adjusted to be
more narrow than the channel bandwidth, then the oscilloscope will automatically
decrease the channel bandwidth.
NOTE. The oscilloscope will maintain the span to fit a ll the channels on-screen,
plus a margin of 10% (5% on either side.)
Conditions
MDO3000, MDO4000/B, or MDO4000C models with option SA3 or SA6 only.
Group
RF
Syntax
RF:MEASUre:ACPR:CHANSPACing <NR3>
RF:MEASUre:ACPR:CHANSPACing?
Related Commands
RF:MEASUre:ACPR:ADJACENTPAIRs, RF:MEASUre:ACPR:CHANBW,
RF:MEASUre:ACPR:POWer?, RF:MEASUre:ACPR:LA1DB?,
RF:MEASUre:ACPR:LA2DB?, RF:MEASUre:ACPR:LA3DB?,
RF:MEASUre:ACPR:UA1DB?, RF:MEASUre:ACPR:UA2DB?,
RF:MEASUre:ACPR:UA3DB?
Arguments
<NR3> is a floating point number.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-553
Commands Listed in Alphabetical Order
Examples
RF:MEASUre:AC
PR:CHANSPACing 5.0000E+6
sets the ACPR channel
center-to-center spacing between the Main channel and the side channels to
5.0000E+6 MHz.
RF:MEASUre:ACPR:CHANSPACing? might return 5.0000E+6, indicating the
ACPR channel spacing has been set to 5 MHz.
RF:MEASUre
:ACPR:LA1DB? (Query Only)
This query measures a ratio between the first lower adjacent side channel andthe
Main channel when performing ACPR measurements. The power in the adjacent
channel i
s 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:LA1DB?
Related Commands
RF:
MEASUre:ACPR:ADJACENTPAIRs, RF:MEASUre:ACPR:CHANBW,RF:
MEASUre:ACPR:CHANSPACing, RF:MEASUre:ACPR:POWer?,
RF:MEASUre:ACPR:LA2DB?, RF:MEASUre:ACPR:LA3DB?,
RF:MEASUre:ACPR:UA1DB?, RF:MEASUre:ACPR:UA2DB?,
RF:MEASUre:ACPR:UA3DB?
Examples
RF:MEASUre:ACPR:LA1DB might return –30.000, indicating that the Lower Area
1 side channel (left side of Main channel) has 1/1000 the power of the Main
channel.
If the main channel power is –41.0dBm and
:RF:MEASUre:ACPR:LA1DB returns
–12.0 dB, then the actual power in the adjacent channel is –41.0dBm + –12.0 dB
or –53.0dBm.
RF:MEASUre:ACPR:LA2DB? (Query Only)
This query measures a ratio between the second lower 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 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.)
2-554 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual