Y9071B Datasheet, PDF (5/29 Pages) Keysight Technologies – Measurement Applications For the E6640A EXM Wireless Test Set

05 | Keysight | Measurement Applications for the E6640A EXM Wireless Test Set - Solution Brochure
Sequence
Acquisition 1
Step 1
Step 2
Step 3 Step 4 Step 5 Step 6
Measurement steps
EVM, power,
spectral mask
EVM, power
Power
Power Power EVM
Acquisition 2
Step 1
Step 2 Step 3
Power
Power
First acquisition
Figure 3. An example of the EXM’s WLAN sequencer
Second acquisition
An EXM sequence can be comprised of up to hundreds of separate acquisitions and
in each case the frequency, expected signal level, and trigger conditions can be
programmed. Figure 3 shows two such acquisitions. Within each acquisition, a number
of measurement steps can be defined that will normally be programmed to match the
programmed output from the DUT using its sequence mode. Each measurement step
can be set up to process and return one or more measurement results from the data
acquired in that time period. In the figure, there are six measurements made on the data
from the first acquisition. The EXM sequence is constructed to match the sequence
programmed in the DUT, and when initiated, both are executed together.
Smart Scheduling Instrument
Another test technique supported by EXM is the use of an intermediate test scheduling
executive to manage the TRX to ensure maximum use of the test resources and ensure
maximum production throughput.
Keysight’s name for this is Smart Scheduling Instrument (SSI) and it allows an interme-
diate test scheduling program to manage instrument control and test execution in a way
that allows each DUT to see a “virtual VSA/VSG” independent of the number of physical
TRXs populated in the EXM.
This approach to dynamic resource allocation can improve test efficiency significantly.