NARDA 8718B, User Manual

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59 Chapter 9 Time-Averaged Measurements
5. The meter will continue to make real-time
measurements until you initiate making the time-
averaged measurement.
6. Determine where you want to make the averaged
measurement and place or hold the probe in the
desired position. For short intervals, it may be
practical to hold the meter in one hand and the probe
in the other. For longer intervals, it is suggested that
you place the probe on some form of non-conductive
stand so that it does not move. At frequencies above
50 MHz, the meter should be separated from the probe
by a minimum of 12 inches (30 centimeters) to
minimize any interaction between the meter, the probe,
and the electromagnetic field. At the lower
frequencies, the measurement techniques are very
different. See Low Frequency Measurements in the
Applications Booklet .
7. Press F1 ( START) when you are ready to begin the
time-averaged measurement.
8. The averaged value is displayed on the screen and will
flash each time it is updated (one second intervals).
The meter will automatically stop at the end of the
selected averaging interval.
9. To end time averaging prior to the end of the
averaging interval, press F4 ( STOP ).
10. At the end of the averaging interval, the meter will
show the time-averaged value and the averaging
interval on the second line of the display. The
maximum value will be shown on the third line of the
display. The bar graph will be indicating the
instantaneous field strength in real time.
2 4 . 2 % S T D A V E R A G E
3 9 . 5 M A X C F 1 . 0 0
P A U S E S T O P
F1 F2 F3 F4