Technical data

10 Chapter 1
What is the Sequence Analyzer?
Sequence Analyzer Introduction
What is the Sequence Analyzer?
Sequence Analyzer Introduction
The Sequence Analyzer mode makes it possible to define, save, and execute a series of data acquisitions
(controlled by the analyzer list sequencer) and/or a series of RF stimulus outputs (controlled by the
source list sequencer). This defined series of acquisitions and/or outputs is known as a sequence.
The two list sequencers operate independently; however, they can exchange trigger signals with one
another, and they can both be controlled by the same sequence.
Figure 1-1. Source and Analyzer List Sequencers
Because one sequence can control both list sequencers, launching a sequence is all that is necessary to
cause the test set to (1) make a set of data acquisitions, (2) make measurements on each acquisition, and
(3) generate whatever RF stimulus is needed during each measurement.
Sequences are typically used in calibration and/or verification of a mobile device. The test set generates
the signals that are expected by the mobile device receiver, and analyzes the signals that the mobile
device transmits in response. This method of interacting with the mobile device saves test time, because
it does not involve any call processing (the test set and the mobile device only need to exchange a
predefined set of signals).
The Sequence Analyzer mode combines speed with flexibility. All of the actions controlled by the
sequence are executed rapidly and without interruption, even if the measurements involved use different
radio standards. (For example, it is possible to switch from an EDGE EVM measurement to a W-CDMA
SEM measurement without stopping the sequence and starting a new one.)