Resolving Signals Of Equal Amplitude - Keysight Technologies N9322C User Manual

Resolving Signals of Equal Amplitude

In this example a decrease in the resolution bandwidth
(RBW) is used in combination with a decrease in video
bandwidth (VBW) to resolve two signals of equal amplitude
with a frequency separation of 100 kHz.
Figure 3-4 Setup for obtaining two signals
Signal Generator
FUN CTIONS
N9310A RF Signal Generator 9 kHz - 3.0 GHz
Frequency AM I/ Q Utility
Amplitude FM Sw eep File
Enter M Pulse Trigger
7 8 9 M OD
On/ Off
4 5
6
1 2 3
0 ·
RF
On/ Off
Remote
Standby LF OUT RF OUT 50
On
REV ERSE PWR
4W M AX 30VDC
RF OUT
Notice that the final RBW selection to resolve the signals is
the same width as the signal separation while the VBW is
slightly narrower than the RBW.
1
Connect two sources to the analyzer input as shown above.
2
Set one source to 300 MHz. Set the frequency of the other
source to 300.1 MHz. Set both source amplitudes to –20 dBm.
3
Setup the analyzer to view the signals:
Press Preset (With Preset Type of Factory)
Press Frequency > 300 > MHz
Press BW > 300 > kHz
Press Span > 2 > MHz
A single signal peak is visible. See
Signal Generator
N9310A RF Signal Generator 9 kHz - 3.0 GHz
Preset
Local
LF Out
Remote
Standby
On
RF OUT
Functions and Measurements
Measuring Mul tiple Signals
Spectrum Analyzer
N 9320A SPECTRUM AN ALYZER
FUNCTION S
Frequency AM I/ Q Utility Preset
Amplitude FM Sw eep File Local
Enter M Pulse Trigger LF Out
7 8 9
M OD
On/ Off
4 5 6
1 2 3
·
0 RF
On/ Off
Rem ote
LF OUT RF OUT 50 Standby
On
REV ERSE PWR
4W MAX 30VDC
Directional Coupler
Figure 3-5
9 kHz - 3.0 GHz
Auto BW / Sw eep/
Tune Avg Trig
Local
View / Det/ File/
M arker
Trace Display Print
Save
Peak
MODE Meas M arker
Search
7 8 9
4 5 6
1 2 3
Back
0 · Enter
50VDC M AX
30dBm 1W M AX
TG SOURCE CAL OU T RF IN 50
PROBE POWER
50M Hz 10dBm CAT Ⅱ
RF IN
for example.
39