HP 8711C User Manual page 114

Using Instrument functions
Using Markers
To Search for
Bandwidth Values
2. Press 1-61 CENTER] to change the -3 dES bandwidth target level to -6 dES.
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.
4-12
深圳市盛腾仪器仪表有限公司
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 hlter 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 as the center frequency divided by the bandwidth.
Tel:0755-83589391 Fax:0755-83539691 Website: www.Sengt.c