IQ Map Adjustment

This adjustment applies to the following models:

This process corrects the IQ modulation gain and phase imbalance. The IQ Map adjustment measures modulator gain imbalance, quadrature phase imbalance, and DC offset at several RF frequencies in each frequency band defined by the RF low-pass filter selected. It calculates a matrix based on the gain and phase imbalance of I and Q and creates a correction matrix to fix these imbalances.

Required Test Equipment

Test Equipment

Recommended Models1

Spectrum analyzer

N9030A Option 5xx2

Attenuator, 6 dB Fixed

8493C Opt. 006

50 W terminator

  • 3 required

909D

Adapter, 3.5 mm (f) to 2.4 mm (f)

11901B

Cable, 3.5 mm (m) to 3.5 mm (m)3

  • 48 inch

8121-1221

Cable, BNC (m) to SMB (f)3

  • 2 required

8121-2063

100 MHz reference

M9300A
  1. Refer to the main Required Equipment table for a list of alternative models.
  2. Select any frequency option (503, 508, 526, 543, 544, 550)) that has a maximum frequency greater than or equal to the maximum frequency of the unit under test.
  3. The RF cable length must be within +/- 6 inches of the length of the cable used to connect the triggers of the source and signal analyzer.

Connections and Setup Procedures

Setup for IQ Map Adjustment