Making Power Measurements With The Option 19 High Accuracy Power Meter6-9 - Anritsu spectrum master ms2711d User Manual

Making Power Measurements with the Option 19 High Ac-
curacy Power Meter
Option 19 and sensor PSN50 can be used to make High Accuracy Power Measurements
from 50 MHz to 6 GHz. This high performance sensor provides true RMS measurements
from –30 to +20 dBm providing accurate measurements for both CW and complex digitally
modulated signals.
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 %.
Figure 6-5. High Accuracy Power Measurement Display
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.
The Option 19 High Accuracy Power Meter connects to the PSN50 High Accuracy Power
Sensor using an RS232 cable (Anritsu part number 800-441). A 9-18 VDC (<100 mA)
power supply is needed to power the sensor. Anritsu power supply (40-168), supplied with
the Site Master, or battery supply (3-40-172), supplied with the PSN50, are recommended.
The zero feature improves accuracy between –20 and –30 dBm by removing measured sys-
tem noise. Cal Factors correct both efficiency and mismatch loss. The frequency informa-
tion must be entered to obtain the correct calibration factor.
When necessary, attenuators should be used to ensure that the power does not exceed the
specified measurement range. The Offset dB feature can be used to enter the value of any
cables and attenuators. It is possible to measure the loss of a cable or attenuator, up to 3
GHz, using Option 21 (Transmission Measurement) or the Offset Cal Kit, 65701
(MS2711D with Option 21, 28, or 29).
Chapter 6 Power Measurement
6-9