Keysight Technologies N9340B, Руководство пользователя

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Making Measurements

Measuring Multiple Signals
40
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
Frequency
Ent er
7 M OD
On/ Off
RF
4
1
0
2
9
6
3
On/ Off
Amplit ude FM
U tility
LF Out
Preset
Local
AM I/Q
File
Trig ger Pulse M
·
Sw eep
8
5
Remot e
Standby
On
N 9310A RF Signal Generator 9 kHz - 3.0 GHz
REVERSE PW R
4W M AX 30VDC
LF OUT RF OU T 50
FUN CTION S
Frequency
Enter
7 M OD
On/ Off
RF
4
1
0
2
9
6
3
On/ Off
Am plitude FM
Ut ility
LF Out
Preset
Local
AM I/ Q
File
Trigger Pulse M
·
Sw eep
8
5
Rem ote
Standby
On
N9310A RF Signal Generator 9 kHz - 3.0 GHz
REVERSE PWR
4 W MA X 30 VD C
LF OUT RF OUT 50
FUN CTIONS
Directional
coupler
Signal generator
Signal generator
Setup for obtaining two signals
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]
• Press [FREQ] > 300.05 > {MHz}
• Press [SPAN] > 2 > {MHz}
• Press [BW/SWP] > 30 > {kHz}
Use the knob or the arrow keys to further reduce the
resolution bandwidth and better resolve the signals.