SYSTEM DOES NOT POWER-UP

TROUBLESHOOTING

Step 5. Connect the common lead of the oscilloscope to J13, pin 8. Measure the Power Supply Sync signal (PS_SYNC) on J13, pin 14:

Specification: 2-4 vpp Sine Wave at 109.89 KHz

NOTE

The power supply module will power-up without the

PS_SYNC signal being present. However, the lack of this signal will introduce signal purity problems when the sys- tem is performing measurements.

Power Supply Module If any of the DC voltage tests fail, verify that the power supply module is Check operating properly with minimal impact from the system as described in

the procedures below.

NOTE

If a power supply voltage is low, it may be due to excessive current draw from the system and not a fault in the power supply.

Steps 1 through 4 verify the operation of the + 9, ± 18, and ± 27 Vdc supplies:

Step 1. Press the 373XXA Power key off, and and disconnect the power input cord.

Step 2. Disconnect the power supply module from the A17 Mother- board at J4.

Step 3. Reconnect the power line input cord to the system and press the 373XXA Power key on.

Step 4. Using a DMM and/or an oscilloscope, measure the power supply voltages at the power supply connector pins that correspond to the Motherboard pins for the + 9, ± 18, and

±27 Vdc supplies. Refer to Table 5-1 and Figure 5-1 (previ- ous page).

Steps 5 through 8 check the +5 volt supply. This power supply re- quires at least a 10% load to turn on. Therefore, at least one of the dig- ital PCBs A9, A13, or A14 (which use the 5 volt supply) must be in- stalled in the system during this procedure.

Step 5. Press the 373XXA Power key off, and reconnect the power supply module to the Motherboard at J4.

Step 6. Unplug digital PCB’s A13 and A14.

Step 7. Press the 373XXA Power key on.

5-6

373XXA MM

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Anritsu 373XXA manual System does not POWER-UP Troubleshooting

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.