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When the S2438 series microwave power meter is connected to a CW power sensor, it will adopt the same signal
processing method as a standard traditional power meter. After being amplified through chopping and weak signals, the
sensor detection voltage will be sent to the power meter main unit for further processing. The processed data will be sent
to the CPU for display processing after various compensations.
When the S2438 series microwave power meter is connected to a peak power sensor, the internal dual-diode sensor with
a balanced configuration will convert the microwave pulse modulation input signals into pulse modulation envelope
signals after detection, and the pre-amplification circuit in the sensor will filter and pre-amplify the pulse modulation
envelope signals and send them to the power meter channel processing unit for baseband amplification and bandwidth
control. The signals will be input to trigger the high-speed comparator circuit to generate the trigger synchronization
signal on one way and to the post amplifier for amplification on the other way. The post amplifier will amplify and
output the signals to the high-speed analog-to-digital converter (ADC) for analog-to-digital conversion. The converted
data will be sent to the DSP for processing and finally sent to the display unit for display.
The power meter calibrator part provides a calibration signal with a power of 1.000 mW. The calibrator provides an
absolute power reference for the microwave power meter so that the power can be traced back to a manufacturer'
standard or a national standard.
Consisting of microprocessor, system ROM, system RAM and logic control circuit, the CPU mainly completes the
communication with the DSP, data transmission, waveform measurement analysis, display processing and interface
operation besides control of the keys, LCD display and interface unit.
6.2 Fault Diagnosis and Troubleshooting
Normally, the problem is caused by the hardware, software, or improper use. Once a problem occurs, first observe the
error information, analyze the possible causes, and solve the problem in advance by reference to the methods provided in
“6.2.1 Basic fault diagnosis process” and “6.2.2 Common faults and troubleshooting methods”. Alternatively, you can
contact our customer service center and provide the collected error information, and we will help you solve the problems
as quickly as possible.
Fault Diagnosis and Guides
This part provides general guidance on how to carry out simple judgment and handling when the S2438 series spectrum
analyzer has any fault. If necessary, please feed back the problem to the manufacturer as accurately as possible, so that
we can solve it as soon as possible.
6.2.1 Basic fault diagnosis process
Generally, the problems come from hardware, software or improper use. If there is any problem,, it is necessary to
check:
1) Whether the power outlet is normal and the power supply complies with the working requirement of the instrument.
