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Anritsu 373XXA manual Analog Subsystem Assemblies, System Description

Models: 373XXA

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ANALOG SUBSYSTEM ASSEMBLIES

SYSTEM DESCRIPTION

nals are then sent to the A21A1 YIG/Bias Controller PCB. This PCB converts the analog signals to YIG main tuning coil current.

The main tuning coil current from A21A1 YIG/Bias Controller PCB coarsely tunes the YIG-tuned Oscillator to within a few megahertz of the final output frequency. The YIG phase-lock loop then fine tunes the YIG-tuned oscillator to the exact output frequency via the FM (fine tuning) coil.

The fundamental frequency source signal is leveled by a PIN Diode at- tenuator that is part of the Switched Filter Assembly. This attenuator is controlled by the Automatic Leveling Control (ALC) circuits that are located on the A21A2 Source Control PCB. The input to the ALC cir- cuits is the DC feed-back signal from the leveling detectors located in the Test Set Module.

Depending on the frequency of operation, the fundamental signal is passed through one of four low-pass filters located in the Switched Fil- ter Assembly. The cut-off frequencies for these filters are 3.3 GHz,

5.5GHz, 8.4 GHz, and 13.5 GHz, respectively. The signal is then passed through a 20 GHz high pass filter before being routed either di- rectly to the Test Set Module, or to the Down-Converter Assembly .

The signal is switched to the Down-Converter Assembly only when the 373XXA is operating in the low end portion of its frequency range. The frequency of the output signal from the Down-Converter Assembly is

22.5MHz to 2 GHz for Models 37311Aand 37317A and 40 MHz to 2 GHz for Models 37225B and above. The output signal from the Down-Converter Assembly is routed to the Test Set Module.

Test Set Module The Test Set Module consists of the items listed below; refer to Figure 7-2.

￿Transfer Switch assembly

￿Two Couplers (Models 37325A and above) or two Low Frequency Bridges (Models 37317A and below)

￿Switched Doubler Module for 20-40 GHz operation (Model 37369A)

In the Test Set Module, the 22.5 MHz – 20 GHz signal from the signal source module is switched (via the Transfer Switch) between the front panel Port 1 and Port 2 connectors. The Transfer Switch is controlled by the A9 Main Processor PCB to set the direction of signal flow for the desired test (Port 1 = Forward; Port 2 = reverse). For operation be- tween 20 GHz and 40 GHz, the stimulus signal is routed to the Switched Doubler Module before being sent to the Transfer Switch.

The stimulus signal is output to the DUT via directional couplers mounted directly to the Port 1 and Port 2 front panel connectors. Note that bridges are used instead of couplers in RF Models 37211B and 37217B.

7-8

373XXA MM

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Anritsu 373XXA manual Analog Subsystem Assemblies, System Description
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373XXA specifications

The Anritsu 373XXA series is a notable line of microwave and RF signal analyzers designed for comprehensive analysis and testing of various wireless communication technologies. These analyzers are specifically crafted to meet the demands of modern communication systems, making them ideal for engineers and technicians working in wireless research, development, and manufacturing.

One of the main features of the Anritsu 373XXA series is its wide frequency range, which typically spans from as low as 5 kHz to several GHz, accommodating a vast array of signal types and applications. This extensive frequency coverage allows users to test and validate all manner of systems, from LTE and 5G networks to satellite communications, yielding accurate and reliable measurement results.

The device employs advanced measurement technologies that provide in-depth analysis capabilities. Among these technologies is the ability to perform both time and frequency domain measurements, allowing users to visualize and diagnose signal integrity issues effectively. In addition, the 373XXA series incorporates vector signal analysis, which is crucial in evaluating complex modulated signals, commonly found in today’s sophisticated wireless communication protocols.

Another distinguishing characteristic of the Anritsu 373XXA is its user-friendly interface. It features a large, high-resolution display that enables easy navigation through the analyzer's functions and measurements. The intuitive design is further enhanced by customizable settings and measurement configurations that streamline the workflow, making it accessible for both novice and experienced users.

The 373XXA series also supports various digital and analog signal demodulation techniques, ensuring compatibility with an array of communication standards. Furthermore, users can benefit from its built-in signal generation capabilities, which allows for end-to-end testing of devices and systems under realistic operational conditions.

Portability is another key feature of the Anritsu 373XXA series. The compact design and lightweight structure facilitate easy transport, which is particularly advantageous for field applications where mobility is critical.

Overall, the Anritsu 373XXA series stands out as a versatile and powerful tool for professionals in the RF and microwave field, thanks to its extensive frequency range, advanced measurement technologies, user-friendly interface, and portability. Whether developing new wireless standards or troubleshooting existing systems, the 373XXA delivers precision and reliability essential for today’s dynamic communication landscape.