Resolving Signals Of Equal Amplitude - Keysight Technologies N9321C User Manual

Functions and Measurements
Measuring Multiple Signals

Resolving Signals of Equal Amplitude

Signal Generator
Remote
Standby
On
38
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
FUN CTIONS
N9310A RF Signal Generator 9 kHz - 3.0 GHz
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
LF OUT RF OUT 50
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 DFT)
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 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
Remote
Standby LF OUT RF OUT 50
On
REV ERSE PWR
4W MAX 30VDC
RF OUT
Directional Coupler
Spectrum Analyzer
N 9320A SPECTRUM ANALYZER 9 kHz - 3.0 GHz
7
4
1
0
Remote
Standby TG SOURCE
On
RF IN
Figure 3-5
for example.
Auto BW/ Sw eep/
Tune Avg Trig
Local
V iew / Det/ File/
M arker
Trace Display Print
Save
Peak
M ODE M eas Marker
Search
8 9
5 6
2 3
Back
· Enter
50VDC M AX
30dBm 1W M AX
CAL OUT RF IN 50
PROBE POW ER
50M Hz 10dBm CAT Ⅱ