Spectrum Analyzer Performance Verification 3-10 Third Order Intercept (TOI)
MS20xxC MM PN: 10580-00307 Rev. D 3-29
3-10 Third Order Intercept (TOI)
The following test verifies the Third Order Intercept point (also known as TOI or IP3) of the spectrum analyzer
in VNA Master models MS2036C, MS2037C and MS2038C.
Equipment Required
• 10 MHz Reference Standard, Symmetricom Model Rubisource T&M
• Synthesized Signal Generator (quantity 2), Anritsu Model MG3692X
• BNC(m) to BNC(m) Coaxial Cable (quantity 3), Anritsu part number 2000-1627-R
• BNC Tee Adapter, BNC(m) to BNC(f)/BNC(f), Anritsu part number 3-2600-2
• Dual Channel Power Meter, Anritsu Model ML2438A
• Power Sensor, Anritsu Model MA2442D
• Power Splitter, Aeroflex/Weinschel Model 1870A
• 2 dB Fixed Attenuator (quantity 2), Aeroflex/Weinschel Model 44-2
• 6 dB Fixed Attenuator (quantity 2), Aeroflex/Weinschel Model 44-6
• 20 dB Fixed Attenuator (quantity 2), Aeroflex/Weinschel Model 44-20
• N(m) to N(m) Adapter, Anritsu Model 34NN50A
• K(m) to N(f) Adapter (quantity 2), Anritsu Model 34RKNF50
• N(m) to N(m) RF Coaxial Cable (quantity 2), Anritsu Model 15NN50-1.0B
• N(f) to K(m) Adapter, Anritsu Model 34NFK50 (For MS2038C with Option 11 Only)
Procedure
1. Refer to Figure 3-5 and set up the test equipment as follows:
a. Install the BNC Tee adapter to the 10 MHz Reference Standard and then use a BNC(m) to
BNC(m) coaxial cable to connect the 10 MHz Reference Standard to the Ext Ref Input connector of
the MS203xC VNA Master.
b. Use a BNC(m) to BNC(m) coaxial cable to connect the 10 MHz Reference Standard to the 10 MHz
Ref In connector of the MG3692X Synthesized Signal Generator #1.
c. Use a BNC(m) to BNC(m) coaxial cable to connect the 10 MHz Ref Out connector of the MG3692X
Synthesized Signal Generator #1 and to the 10 MHz Ref In connector of the MG3692X Synthesized
Signal Generator #2.
d. Connect a 20 dB Fixed Attenuator to each arm of the Power Splitter.
e. Connect a 6 dB Fixed Attenuator to each of the 20 dB Fixed Attenuators.
f. Connect a 2 dB Fixed Attenuator to each the 6 dB Fixed Attenuators.
g. Install 34RKNF50 adapters to the RF Output connectors of both MG3692X instruments.
h. Connect N(m) to N(m) Coaxial RF Cables to the 34RKNF50 adapters at the outputs of the
MG3692X instruments.
i. Connect the open ends of the RF cables to the open ends of the 2 dB Fixed Attenuators.
j. Turn on the 10 MHz Reference Standard, MG3692X Synthesized Signal Generators, Power Meter,
and MS203xC VNA Master.
k. Install the 34NN50A Adapter to the Spectrum Analyzer RF In connector of the MS203xC. For an
MS2038C with Option 11, install the 34NFK50 Adapter prior to installing the 34NN50A Adapter.
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