Testing Performance 6
Keysight Infiniium MXR-Series Real-Time Oscilloscopes User's Guide 81
Procedure 1 Preset the power meter.
2 Ensure that the power sensor is disconnected from any source and zero the
meter.
3 Connect the power sensor to the power meter's Power Ref connector and
calibrate the meter.
4 Make the connections to oscilloscope channel 1 as shown in the preceding
connection diagram.
5 Set up the power meter to display measurements in units of Watts.
6 Click Control > Factory Default, then configure the oscilloscope as follows:
a Ensure the channel under test is displayed and all other channels are turned
off.
b In the Channel dialog box, set the vertical scale of the channel under test to
5 mV/div and the input impedance to 50 Ohms.
c Set the horizontal scale to 16 ns/div (to display 8 cycles of a 50 MHz
waveform).
d Click Setup > Acquisition... and ensure the acquisition parameters are set up
as follows:
• Sin(x)/x Interpolation = Auto
• Analog Averaging = Enabled with # of Averages set to 16
• Analog Memory Depth = Automatic
• Analog Sampling rate = Maximum (select the Manual button and click
the up-arrow as high as it goes)
e Click Measure > Add Measurement....
f In the Add Measurement dialog box, click Vertical and RMS, and configure
the measurement as follows:
• Source = Channel 1
• Measurement Area = Entire Display
• RMS Type = AC
• Connect output 1 of the 11667B splitter to the oscilloscope Channel n input directly using the
1250-1200 adapter, without any additional cabling or adapters.
• Connect output 2 of the 11667B power splitter to the power sensor using the 1250-1750 N-type to
3.5 mm adapter, without any additional cabling or adapters.
• Minimize the use of other adapters.
• Ensure that SMA and 3.5 mm connectors are tightened properly:
8 in-lbs (90 N-cm) for 3.5 mm
5 in-lbs (56 N-cm) for SMA
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