Keysight Technologies N52 Series User's And Service Manual page 77

Service Information
Measure LO OUT (Gain and Power)
Prepare the PNA to measure S12 with a normalization calibration. Refer to
"PNA Normalization Calibration" on page
20 GHz and a power level of −10 dBm. The cable on PNA Port 2 must be
long enough to reach the rear panel of the test set.
1. Connect the PNA Port 2 cable to the rear panel LO IN.
2. Connect PNA Port 1 to Port 1 LO OUT on the test set. Verify the LO Output
3.
4.
5. Disconnect the cable from LO IN and measure the power at the end of the
6. Measure the Port 1 LO OUT power using a power meter. The power should
Figure 2-14 LO Output Gain with −10 dB Input
72
gain is > 20 dB. The trace should be within 10 dB of "flat" and have no
significant holes or discontinuities. Refer to
Move PNA Port 2 cable to Port 2 LO Out and confirm a similar result.
Select [Sweep] > Sweep Type > CW Time. Set the sweep time to 10 seconds.
cable using a power sensor. The power should be in the −8 to −12 dBm
range. Adjust the PNA power output level if needed. Reconnect the cable
to LO IN.
be +12 dBm (± 1.5 dB). Measure LO OUT for the other ports on the test set.
69. Use a frequency range of 8 to
Figure 2-14
Keysight N5261/62A User's & Service Guide
below.