Baseband I/Q Measurement Overview - Keysight X Series Measurement Manual

Baseband I/Q measurement overview

The Baseband I/Q functionality is a hardware option, Option BBA. If the option is
not installed in the instrument, the I/Q functionality cannot be enabled.
The Baseband I/Q option provides four input ports and one Calibration Output port.
The input ports are I, I-bar, Q, and Q-bar. The I and I-bar together compose the I
channel and the Q and Q-bar together compose the Q channel. Each channel has two
modes of operation:
Mode
Single Ended
(unbalanced)
Differential
(balanced)
The system supports a variety of input passive probes as well as the Keysight 1153A
active differential probe using the InfiniMax probe interface.
NOTE
To avoid duplication, this section describes only the details unique to using the
baseband I/Q inputs. For generic measurement details, refer to the previous "Making
Measurements" sections.
To make measurements using baseband I/Q Inputs, make the following selections:
Step
1 Select measurement.
2 Select the I/Q Path
3 Select the appropriate
4 Select baseband I/Q
Description
In this mode, only the main port (I or Q) is used and the
complementary ports (I-bar or Q-bar) is ignored. The I and Q ports
are in single-ended mode when Differential "Off" is selected.
In this mode, both main and complementary ports are used. To
activate this mode, select Differential "On" from the I and Q Setup
softkey menus.
circuit location and
probe(s) for
measurements.
input connectors.
Using Option BBA Baseband I/Q Inputs
Baseband I/Q measurement overview
Notes
Select a measurement that supports baseband I/Q inputs.
Press Input/Output, I/Q, I/Q Path.
Select from the choices present on the screen. The path
selected is shown at the top of the measurement screen.
For details see ""Selecting input probes for baseband
measurements" on page
chapter.
157
223" in the Concepts