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PXIe-5185/5186 Calibration Procedure
SMA Adapters
This procedure characterizes the power splitter imbalance when using SMA adapters. The
results of this characterization are later used as a correction in the
Verifying 50
Ω
AC Amplitude
Accuracy and Bandwidth
procedure.
1.
Connect the SMA (f)-to-N (f) adapter to the power sensor. Refer to this assembly as the
power sensor
.
2.
Zero the power sensor as described in the
Zeroing the Power Sensor
section.
3.
Connect the RF OUT connector of the signal generator to the input port of the power splitter
using an SMA (f)-to-N (m) adapter and an SMA (m)-to-SMA (m) cable.
4.
Connect an SMA (m)-to-SMA (m) adapter to one of the power splitter output ports. Refer
to this assembly as
splitter output 1
.
5.
Connect the 50
Ω
SMA terminator (f) to splitter output 1.
6.
Connect the other SMA (m)-to-SMA (m) adapter to the other output port of the power
splitter. Refer to this assembly as
splitter output 2
.
Table 2.
Power Splitter Characterization for SMA Configuration
Configuration
Test Point
Impedance
Frequency
(MHz)
Amplitude (dBm)
1
50
Ω
0.05
-0.5
2
50
Ω
(PXIe-5185 only)
3000
-0.5
3
50
Ω
(PXIe-5186 only)
5000
-0.5
