Technical data

278 Agilent N8201A Performance Downconverter Synthetic Instrument Module, 250 kHz to 26.5 GHz
15 Measurement Setup
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 N8201A 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