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4
Making Measurements
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 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 below.
Figure 3
Re m o te
Sta n d b y
O n
Signal generator
R e m o te
St a nd b y
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:
•
•
•
•
46
Setup for obtaining two signals
FUN CTI O N S
N 9310 A
RF Si g na l G en er a to r
9 kH z - 3.0 G H z
F r eq u en c y
A M
I / Q
U t ili ty
Pr es e t
A m p li tu de
FM
Fi le
Lo c a l
Sw e ep
E n t e r
M
Pu ls e
Tr i g ge r
LF O ut
7
8
9
M O D
O n/ O f f
4
5
6
1
2
3
0
·
RF
O n/ O f f
LF O U T
R F O U T 50
R E V E R SE PW R
4W M A X 30 VD C
N 9310 A
RF Si g n a l G en er a to r
9 kHz - 3. 0 G Hz
FU N C TI O N S
Fre qu en c y
A M
I / Q
U ti li ty
Pr eset
A m p lit u de
FM
Sw ee p
F ile
L o c a l
E n ter
M
Pulse
Trigg er
L F O u t
7
8
9
M O D
O n /O f f
4
5
6
1
2
3
0
·
RF
O n / O f f
L F O U T
RF O UT 50
R E V E R SE PW R
4W M AX 3 0 VD C
Press [PRESET].
Press [FREQ] > {Center Freq} > 300 > {MHz}.
Press [BW/SWP] > {RBW} > 300 > {kHz}.
Press [SPAN] > {Span} > 2 > {MHz}.
Directional
coupler
N9340A User's Guide
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