Chapter 6
High Accuracy Power Meter
Introduction
Anritsu's High Accuracy Power Meter (Option 19) enables high accuracy, RMS
measurements for both CW and digitally modulated signals such as CDMA/EV-DO,
GSM/EDGE, and WCDMA/HSDPA. This option requires either the PSN50 or MA24104A
power sensors. The PSN50 power sensor provides high accuracy terminating measurements
from 50 MHz to 6 GHz with a dynamic range from –30 dBm to +20 dBm. The MA24104A
is an Inline High Power sensor with a frequency range from 600 MHz to 4 GHz and can
measure signals as high as 150W. Both of the power sensors are equipped with an RS232
interface for fast and easy connection to the Site Master.
Units and Relative Power
The display shows the power values in both dBm and Watts. The Relative Power feature
displays power changes with respect to a reference value in both dB and %.
Limit Lines
Limits can be used to determine if a measurement is within specified limits, and running av-
eraging is available along with Max/Hold and Run/Hold.
Connecting the Sensor
The Option 19 High Accuracy Power Meter connects to the PSN50 or MA24104A power
sensor using an RS232 cable (Anritsu part number 800-441).A9to18VDC(<100 mA)
power supply is needed to power either sensor (the MA24104A power sensor can also be
powered with three AA batteries). Anritsu power supply (40-168-R), supplied with the Site
Master, is recommended.
6-1
Figure 6-1. High Accuracy Power Measurement Display
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