User`s guide

Functions and Measurements 3
N9320A Spectrum Analyzer 57
Measuring Stop Band Attenuation of a Lowpass Filter
When measuring filter characteristics, it is useful to look at
the stimulus response over a wide frequency range. Setting
the analyzer x- axis (frequency) to display logarithmically
provides this function. The following example uses the
tracking generator to measure the stop band attenuation of a
370 MHz low pass filter.
1 To measure the response of a low pass filter, connect the
equipment as shown in Figure 20. This example uses a
370 MHz low pass filter.
Figure 20 Transmission Measurement Test Setup
2 Press > Preset. (With Preset Type of Factory)
3 Set the start and stop frequencies and resolution bandwidth:
Press > Start Freq > 100 > MHz
Press > Stop Freq > 1 > GHz
Press > Scale Type > Log
Remo t e
Standby
On
TG SOURCE CAL OUT
50MHz
10dBm
7
·
4
1
0
2
5
89
6
3
Back
Ent er
Marker
Peak
Search
Marker
Auto
Tune
Det/
Display
File/
Print
BW/
Avg
View/
Trace
MeasMODE
Swee p/
Trig
Local
Save
N9320A SPECTRUM ANALYZ ER 9 kHz - 3 .0 GHz
PROBE POW ER
RF IN 50
50VDC MAX
30dBm 1W MAX
CAT Ⅱ
DUT
Preset/
System
Frequency
Frequency
Amplitude