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Agilent
Choosing the Right Power
Meter and Sensor
Product Note
Design and manufacturing engineering data transmissions, now demand
processes for RF/microwave power measuring instruments and
systems have reached a status un- sensors for average power, as well as
dreamed of a decade ago. Wireless time-gated and peak power profiles
communication engineers especially, and peak-to-average ratios, with all
faced with aggressive project sched- those measurements delivered at high
ules must quickly select and configure measurement-data rates.
power measurement equipment which
meets the accuracy and repeatability The Agilent Technologies' contribu-
required by their innovative new mod- tion: unsurpassed accuracy and
ulation formats. New wireless tech- repeatability--by design.
nologies needed to support wideband
In general, power sensors are This product note outlines applica- Not discussed is the Agilent family of
designed to match user signals and tions considerations and the newest thermistor sensors and the associated
modulation types. Power meters are sensor technologies available from Agilent 432A power meter. This ven-
designed for matching the user's Agilent Technologies. It includes erable technology now is used almost
measurement data requirements. Agilent's new power meters and fami- exclusively for the standardization
That's why you can choose from a ly of peak and average sensors, and traceability of power measure-
versatile line of 33 different power designed for pulsed power and the ments from the U.S. National Insti-
sensors and 6 power meters from complex-modulation signals of wire- tute of Standards and Technology and
Agilent Technologies, as shown in less communications markets. It also other international standards agen-
table 1. In addition, Agilent offers reviews the families of thermocouple, cies. Since the Agilent 432A power
many custom configurations for ATE diode, and two-path, diode-attenua- meter and thermistor sensor technol-
system applications and other cali- tor-diode sensors. It discusses the ogy is based on the highly-precise
bration, traceability and quality advantages and disadvantages of DC-substitution method, the sensors
processes. each sensor technology as they apply are used as transfer standards, travel-
to current and near-future wireless ling between the user's primary lab
system advances. and the NIST measurement services
laboratory. For those users with inter-
est in such metrology power transfer
processes, request Agilent's AN 64-1
and 64-4 application notes.
Table 1. An overview of Agilent power meters and sensors
Agilent power meters
EPM-P series EPM series System power meters
peak, average and Averaging 70100A MMS
time gating E4418B single Ch E1416A VXI
E4416A single Ch E4419B dual Ch
Agilent power sensors E4417A dual Ch
Thermocouple
8480A/B/H-family