Rohde & Schwarz FSP7 - Checking Nonlinearities; Third Order Intercept Point

R&S FSP Performance Test
1164.4556.82 1.7 E-1
Checking Nonlinearities
Third Order Intercept Point
Test equipment:
- 2 signal generators
R&S FSP 3: Refer to "Measurement Equipment", items 2 & 3.
R&S FSP 7/13/30/40: Refer to "Measurement Equipment",
items 2 & 5.
Frequency range:
R&S FSP 3: 10 MHz to 3 GHz
R&S FSP 7: 10 MHz to 7 GHz
R&S FSP 13: 10 MHz to 13.6 GHz
R&S FSP 30: 10 MHz to 30 GHz
R&S FSP 40: 10 MHz to 40 GHz
Maximum level  0 dBm
- 2 attenuators (refer to "Measurement Equipment", item 12)
Attenuation a
ATT
= 10 dB
Frequency range
R&S FSP 3: 10 MHz to 3 GHz
R&S FSP 7: 10 MHz to 7 GHz
R&S FSP 13: 10 MHz to 13.6 GHz
R&S FSP 30: 10 MHz to 30 GHz
R&S FSP 40: 10 MHz to 40 GHz
- Power splitter (refer to "Measurement Equipment", item 6)
Frequency range
R&S FSP 3: 10 MHz to 3 GHz
R&S FSP 7: 10 MHz to 7 GHz
R&S FSP 13: 10 MHz to 13.6 GHz
R&S FSP 30: 10 MHz to 30 GHz
R&S FSP 40: 10 MHz to 40 GHz
Decoupling > 12 dB
Test setup:  Connect RF outputs of the signal generators via 10 dB attenuators
to the inputs of the power splitter.
 Connect output of the power splitter to RF input of the R&S FSP.
Signal generator settings
(both generators):
- Frequency: Generator 1 f
g1
= f
in
 50 kHz
Generator 2 f
g2
= f
in
+ 50 kHz
Refer to "Performance Test Report" table for values of f
in
.
 Adjust the output level of signal generators for an input level at the
R&S FSP of -20 dBm.
R&S FSP settings:
- [ PRESET ]
- [ AMPT : RF ATTEN MANUAL : 0 dB ]
- [ AMPT : -10 dBm ]
- [ SPAN : 500 kHz ]
- [ BW : RES BW MANUAL : 3 kHz ]
- [ FREQ : CENTER : {f
in
} ]
Refer to "Performance Test Report" table for values of f
in
.
Measurement:
 [ MKR FCTN : TOI ]
Evaluation:
The third order intercept point (TOI) referenced to the input signal is
displayed in the marker field by the reading [TOI].