Searching For A Bandwidth - Agilent Technologies 8719D User Manual

2.
Press SEM%Il:. 2'~ to move the active marker to the target point on the measurement
trace.
If you want to change the target amplitude value (default is -3 dB), press X&S&% and
3.
enter the new value from the front panel keypad.
If you want to search for,,multiple responses at the target amplitude value, press
4.
CENTER 11,.240
Example of Searching for a 'beget Amplitude Using a Marker

Searching for a Bandwidth

The analyzer can automatically calculate and display the -3 dB bandwidth (BW:), center
frequency (CENT:), Q, and loss of the device under test at the center frequency. (Q stands for
"quality factor," dellned as the ratio of a circuit's resonant frequency to its bandwidth.) These
values are shown in the marker data readout.
1. Press @GiZ) and turn the front panel knob, or enter a value from the front panel keypad to
place the marker at the center of the filter passband.
4. If you want to change the amplitude value (default is -3 dl3) that defines the passband or
REF
SPAN
Figure 2-26.
CENTER 10.240 OUO
Making Measurements 231
SPAN 2.500