MDO3000 Programmer Manual.pdf - 第590页

Commands Listed in A lphabetical Order RF:MEASUre:O BW:LOWERFreq? (Query Only) This query returns the lower frequency threshold (on the display , the whit e line to the left bracketing OBW power). The R F measurement typ…

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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
Commands Listed in Alphabetical Order
Examples
RF:MEASUre:OB
W:PERCENTdown
80 sets the OBW upper and lower frequencies
such that 80% of the total power is contained within these two frequencies, with
20% remaining (10% on either side of these bounding frequencies).
RF:MEASUre:OBW:PERCENTdown? might return 85.0000, indicating that 85% of
the total power has been set to fit within the occupied bandwidth.
RF:MEASUre
:OBW:POWer? (Query Only)
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:MEASU
re:TYPe). The units are user-set (with the command RF:UNIts).
Conditions
MDO3000, MDO4000/B, or MDO4000C models with option SA3 or SA6 only.
Group
RF
Syntax
RF:MEASUre:OBW:POWer?
Related Commands
RF:MEASUre:OBW:CHANBW, RF:MEASUre:OBW:PERCENTdown,
RF:MEASUre:OBW:LOWERFreq?, RF:MEASUre:OBW:UPPERFreq?
Examples
RF:MEASUre:OBW:POWer? might return –26.1607, indicating that the total
channel power within the occupied bandwidth is 26.1607 user-set units.
RF:MEASUre:OBW:UPPERFr
eq? (Query Only)
This query returns the upper frequency threshold (on the display, the white line to
the right bracketing OBW power). The RF measurement type must be set to OBW
using the command RF:ME
ASUre:TYPe. This frequency will locate the position
where (100% — OBW:PERCENTdown)/2 power is above this frequency.
Conditions
MDO3000, MDO4000/B, or MDO4000C models with option SA3 or SA6 only.
Group
RF
Syntax
RF:MEASUre:OBW:UPPERFreq?
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-561