Agilent Technologies E4443A(3HZ-6.7GHZ) 2.18 Meas Setup (Occupied BandwidthOBW)

Chapter 2 177

One-Button Measurement Functions

Meas Setup (Occupied Bandwidth—OBW)

One-Button Measurement Functions

2.18 Meas Setup (Occupied Bandwidth—OBW)

When Occupied BW has been selected in the Measure menu of the Spectrum Analysis Mode,

this key displays the appropriate measurement setup menu.

The Occupied Bandwidth measurement integrates the power of the displayed spectrum

and puts markers at the frequencies between which a selected percentage of the power is

contained. The measurement defaults to 99% of the occupied bandwidth power. The

power-bandwidth routine first computes the combined power of all signal responses

contained in the trace. For 99% occupied power bandwidth, markers are placed at the

frequencies on either side of 99% of the power. 1% of the power is evenly distributed

outside the markers. The difference between the marker frequencies is the 99% power

bandwidth and is the value displayed.

The occupied bandwidth function also indicates the difference between the analyzer center

frequency and the center frequency of the channel, referred to as “Transmit Freq Error.”

The measurement can be made in single or continuous sweep mode. The center frequency,

reference level, and channel spacing must be set by the user.

Key Path: Front-panel key

Press Avg Numb er (On) to specify the number of measurement averages used when

calculating the measurement result. The average is displayed at the end of each sweep.

Press Avg Numb er (Off) to disable measurement averaging.

Key Path: Meas Setup

State Saved: Saved in instrument state.

Factory Preset: 10 averages / Off

Range: 1 through 1000

Remote Command:

[:SENSe]:OBWidth:AVERage:COUNt <integer>

[:SENSe]:OBWidth:AVERage:COUNt?

[:SENSe]:OBWidth:AVERage[:STATe] OFF|ON|0|1

[:SENSe]:OBWidth:AVERage[:STATe]?

Example: OBW:AVER:COUN 20

OBW:AVER:COUN?