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To Search for
Bandwidth Values
1. Press [MARKER) Marker Somch Bandwidth.
2. Press (--6) [ENTER) to change the -3 dE5 bandwidth target level to -6 dB.
3. If you want to change the marker frequency resolution, press [FREQ)
Each marker's dedicated use is listed in the following table. Figure 4-6 shows
a -6 dB bandwidth marker search.
N O T E
The bandwidth search function is intended for transmission or power measurements in log mag format
only
The bandwidth search feature analyzes a bandpass titer and calculates
the bandwidth, center frequency, and Q (see note below) for the specified
bandwidth level. (The default bandwidth search level is -3 dB.) The
bandwidth information is displayed in the upper-right corner of the
network analyzer screen. The bandwidth feature puts marker 1 in delta
marker mode. (Delta marker mode is explained later in this chapter.)
N O T E
Center frequency
is defined as the halfway point between the left and right bandwidth cutoff
points.
Loss is the amplitude of the center frequency marker.
bandwidth. Your analyzer calculates Q es the center frequency divided by the bandwidth.
Using Instrument Functions
Using Markers
4-13
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