IQ Internal Channel Correction PM Calibration (Adjustment)

(N5166B / N5171B / N5172B / N5181B / N5182B / N5182N)

The following calibrations must be performed prior to running this adjustment:

The goal of this calibration is to generate channel flatness correction data that extends all the way to the output RF port. This calibration begins with data generated from IQ Channel Flatness Fine Calibration and uses an external power meter to make the measurements at the RF output port. This ultimate goal of this data is to generate FIR filter coefficients to be applied to the DUT General Filter engine for all nine bands of the RF Subsection. This FIR filter is used to flatten the signal response across 160 MHz by removing IQ flatness, Baseband Tracking errors, and frequency response non-linearity.

Required Test Equipment

Test Equipment

Critical Specifications for This Test

Recommended Model

Alternate Model(s)

Power Meter

None

N1914A

E4419B
E4418A
E4418B
E4419A
N1911A
N1912A

Power Sensor

None

E9304A

E9304A H18




Connections and Setup Procedures
  • All test equipment requires a 30 minute warmup period to ensure accurate performance.
  • In the following setup, cables are designated as solid lines and direct connections are designated as dashed lines.

Initialize Test Equipment

  1. Connect all test equipment as shown.
  2. Preset all test equipment and the signal generator.

 

Setup for Power Meter Calibration


 

Setup for IQ Internal Channel Correction Power Meter Calibration

In Case of Difficulty

If this adjustment fails, perform the following steps in order:

  1. Check the equipment setup (see above). If the setup is incorrect, make the necessary corrections and rerun the adjustment.

  2. Refer to the troubleshooting section of the service guide. If you do not have a printed copy of the service guide (Option OBW), one is available either on the CD-ROM that came with your signal generator shipment or on the Keysight website.

  3. If necessary, obtain service from Keysight Technologies. Refer to Contacting Keysight Technologies.