Agilent Technologies 437B User Manual download pdf (Page 8)

Designed for R&D

Optimum measurement accuracy and repeatability

means confidence in your power measurements

The EPM series power meters maintain the high accuracy

standard set by the Agilent 437B and 438A—being

designed to have excellent linearity. Instrumentation

absolute accuracy, due to the meter electronics, is

specified to be +0.02 dB in logarithmic mode and

+0.5% in linear mode—making this source of error a

negligible part of the overall measurement uncer-

tainty.

In RF and microwave power measurements, the

largest errors are caused by:

• Sensor and source mismatch, and

• Sensor frequency response, non-linearity, and

temperature characteristics.

To minimize the mismatch error, the E-series

sensors have a low VSWR specification. To pro-

vide comprehensive error correction, the cali-

bration factors, linearity and temperature error

correction information are stored in EEPROM.

Error correction is performed within the power

meter. Frequency data is entered by the user.

Taking account of the signal level, the frequency

being measured, and the temperature, appropri-

ate correction values are applied to the meas-

urement. This error correction process ensures

optimum measurement accuracy and repeatabili-

ty over the full 0 to 55 ˚C temperature range.

User friendly interface for quick setup times

The power meter has an intuitive user interface.

Hardkeys for the most frequently used functions

and softkey menus simplify configuring the power

meter for your particular measurement needs. To

reduce repeated setup sequences, the SAVE/RECALL

menu allows you to save up to 10 instrument config-

urations.

With the E4419B, ratio and difference measurements can be

made. Here the upper half of the display shows the gain of a

GSM amplifier while the lower half of the display shows the B

Channel absolute power measurement in dBm.

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Agilent Technologies 437B User Manual Page 8