Keysight x-series Measurement Guide

151
IQ Analyzer Measurement
IQ Waveform (Time Domain) Measurement
IQ Waveform (Time Domain) Measurement
This section explains how to make a waveform (time domain) measurement on a
W-CDMA signal. (A signal generator is used to simulate a base station.) The
measurement of I and Q modulated waveforms in the time domain disclose the
voltages which comprise the complex modulated waveform of a digital signal.
Step Action Notes
1 Set up the signal source. a. Set the mode to W-CDMA
3GPP with 4 carriers.
b. Set the frequency of the
signal source to 1.0 GHz.
c. Set the source amplitude to
-10 dBm.
2 Connect the source RF
OUTPUT to the analyzer
RF INPUT as shown.
3 Select the mode. • Press Mode, IQ Analyzer
(Basic).
4 Preset the analyzer. • Press Mode Preset.
5 Set the measurement
center frequency.
• Press Freq Channel, 1,
GHz.
6 Set the measurement
span/analysis bandwidth.
• Press Span X Scale, 10,
MHz (25 MHz if option
B25 installed).
7 Enable the IQ Waveform
measurement.
• Press Meas, IQ
Waveform.
8 View the RF envelope. • Press View/Display, RF
Envelope.

Keysight x-series Specifications

General

Analysis Bandwidth	Up to 1 GHz (depending on model)
Real-Time Bandwidth	Up to 1 GHz (depending on model)
Form Factor	Benchtop
Connectivity	LAN, USB, GPIB
Resolution Bandwidth	1 Hz to 10 MHz (depending on model)