Atec Agilent-8990B - Manual (Page 7)

7
Additional Features
Multi-pulse measurement
View, measure and analyze continuous pulse trains from power amplifier
modules or transmitters. The multi-pulse measurement feature allows continu-
ously trigger and capture up to 512 pulses. This feature also adds pulse-to-pulse
measurement and histogram distribution graph capabilities to the 8990B, which
are crucial for testing RF and the pulse-to-pulse stability of power amplifiers and
transmitters.
Additionally, users can use the multi-pulse measurement feature to analyze
short pulse with long off time or amplitude droop across the pulse train, or
monitor the stability of the pulse shape (via the histogram graph functionality).
Power-Added Efficiency math function
Calculate the Power-Added Efficiency (PAE) of power amplifiers and display
instant PAE traces onscreen with the 8990B. Power-Added Efficiency, a typical
power analyze measurement, is a measure of the power conversion efficiency –
the percentage of DC power converted to RF power in the power amplifier – of
power amplifiers.
Reduce test costs and the number of test equipment needed with the 8990B; the
peak power analyzer measures RF power, voltage and current in a single solution
box. The 8990B’s two RF input channels allow users to measure the RF power
gain from the power amplifier; using a DC current probe, scope probe or dif-
ferential probe, they can also measure the power amplifier’s voltage and current
through the analog video input channels. The 8890B’s PAE math function then
uses the measurements from the RF and analog video input channels to easily
determine the PAE of the power amplifier.
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Adjustable ETS threshold for wider bandwidth measurement
Measure peak and peak-to-average of 802.11ac wide bandwidth signal accu-
rately with the 8990B’s 160 MHz video bandwidth capability. The peak power
analyzer can execute power vs. time (PvT) measurements on an 80 MHz or
160 MHz 802.11ac signal by adjusting the ETS threshold according to the burst
length.
Users can also use the zoom function to analyze and measure the preamble
power of the 802.11ac burst signal.