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5.2 Indicator Tests
Let’s take the indicator testing of S3871FB solid-state power amplifier as an example, which can be used
as a reference for other models of solid-state power amplifiers.
1. Testing Instruments and Equipment
Major instruments and equipment required as shown in the table below:
SN
Instrument
Main technical indicators
1
Vector network analyzer
Frequency range: 0.5GHz - 40GHz
2
Signal source
Frequency range: 0.5GHz - 40GHz
3
Power meter
Frequency range: 0.5GHz - 40GHz
4
Power sensor
Frequency range: 0.5GHz - 40GHz
5
Spectrum analyzer
Frequency range: 0.5GHz - 40GHz
6
Attenuator
Frequency range: 0.5GHz - 40GHz
Note: Other instruments that can meet the requirements for indicator testing can be used as substitutes.
2. Indicator Testing Methods
2.1 Normal functionality inspection
Connect the S3871FB solid-state power amplifier to the power supply, place the power switch on the rear
panel to the "-" position (the "On" position), and the standby power indicator on the front panel will be on.
When the working switch on the front panel is turned on, the fans on both sides of the rear panel of the
housing will rotate, the working indicator near the working switch on the front panel is on, the display on
the output power display screen is normal and the key sensitivity is OK.
2.2 Performance characteristics testing
The specific operation steps for testing the following indicators are provided according to the testing
instrument shown in the figure. When other testing instruments with the same performance characteristics
are used for testing, please refer to the User Manual of such instruments for the specific operation. A
signal source and a power meter as shown in Figure 5-2 can also be used to test the gain.
(1) Gain test
a) Testing equipment:
Vector network analyzer:
3672
1
High-power attenuator:
89-30-21
1
Calibration cable:
2
2.4mm calibration piece:
85056A 1 set
b) Testing diagram
