Keysight Technologies N9340B User Manual page 46

Making Measurements
Measuring Multiple Signals
Resolving Signals of Equal Amplitude
In this example a decrease in resolution bandwidth is
used in combination with a decrease in video bandwidth
to resolve two signals of equal amplitude with a
frequency separation of 100 kHz.
Notice that the final RBW selected 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
below.
Figure 4-2
Remot e
Standby
On
Signal generator
Rem ote
Standby
O n
Signal generator
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:
•
•
•
•
Use the knob or the arrow keys to further reduce the
resolution bandwidth and better resolve the signals.
40
Setup for obtaining two signals
N 9310A FUN CTION S
RF Sig nal Generator 9 kHz - 3.0 GHz
Frequency AM I/Q U tility Pr eset
Amplit ude FM Sw eep File Local
Ent er M Pulse Trig ger LF Out
7 8 9
M OD
On/ Off
4 5 6
1 2 3
0 ·
RF
On/ Off
LF OUT RF OU T 50
REVERSE PW R
4W M AX 30VDC
FUN CTIONS
N9310A RF Signal G enerator 9 kHz - 3.0 GHz
Frequency AM I/ Q Ut ility Preset
Am plitude FM Sw eep File Local
Enter M Pulse Trigger LF Out
7 8 9
M O D
O n/ Off
4 5 6
1 2 3
·
0 RF
On/ Off
LF OUT RF OUT 50
REVERSE PWR
4 W MA X 30 VD C
Press [PRESET]
Press [FREQ] > 300.05 > {MHz}
Press [SPAN] > 2 > {MHz}
Press [BW/SWP] > 30 > {kHz}
Directional
coupler