Note

The PAUSE feature can be useful when measuring the average value from certain rotating radars. The effective measurement technique requires you to pause during the period of time when you are not in the beam of the

radar. Continue this technique for two or more revolutions (de- pending on the RPM) to ob-

tain a realistic average

value of the field in the beam at your lo- cation. For details on this measurement technique, see Radar Measurements in the Applications Booklet.

2.You may continue to pause and start the averaging as many times as needed. The time interval initially selected applies only to the measurement time.

3.To end time averaging while *PAUSED*, press F4 (STOP).

To change the averaging interval...

1.To change the averaging interval (once the current measurement interval has been completed or stopped), press F4 (QUIT). To initiate a new time averaging interval, use the menu system to select TIME AVG from the First Menu Screen.

2.Proceed as previously described to select FIXED TIME from the averaging menu screen and then the new averaging interval.

Mode 2 Averaging

Mode 2 averaging (time averaging to meet the requirements of a specific standard) requires two parameters to be properly set before being used:

The meter must be set to the correct standard for your application.

The meter must be set for a specific frequency because the averaging time in many standards is frequency dependent. For example, IEEE C95.1-1999 specifies a six minute averaging period for Controlled Environments from 3 kHz to 15 GHz. Above 15 GHz, the averaging period decreases to ten seconds at 300 GHz based on a logarithmic function.

Chapter 9 Time-Averaged Measurements

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