A9 PCB BBRAM CHIP

REMOVE AND REPLACE

OPTIONS

TRIGGERS

REAR PANEL

OUTPUT

DIAGNOSTICS

MULTIPLE SOURCE CONTROL

PRESS <ENTER>

TO SELECT

HARDWARE CALIBRATIONS (FOR SERVICE ONLY)

LO1

CALIBRATION

LO2

CALIBRATION

SOURCE FREQUENCY CALIBRATION

SOURCE ALC

CALIBRATION

DISK OPERATIONS

PREVIOUS MENU

PRESS <ENTER> TO

SELECT

DIAGNOSTICS

START SELF TEST

READ SERVICE LOG

INSTALLED OPTIONS

PERIPHERAL TESTS

TROUBLESHOOTING (FOR SERVICE ONLY)

H/W CALIBRATIONS (FOR SERVICE ONLY)

PRESS <ENTER> TO

SELECT

H/W CALIBRATIONS DISK OPERATIONS

SAVE

TO HARD DISK

SAVE

TO FLOPPY DISK

RECALL

FROM HARD DISK

RECALL

FROM FLOPPY DISK

DELETE

FROM HARD DISK

DELETE

FROM FLOPPY DISK

COPY FROM HARD TO FLOPPY DISK

COPY FROM FLOPPY TO HARD DISK

PREVIOUS MENU

PRESS <ENTER> TO

SELECT

Preliminary:

Before removing and replacing the BBRAM Chip it is necessary to save the following calibration data to the hard disk: signal source Fre- quency, ALC, Source Lock Threshold, LO1 and LO2. Proceed as fol- lows:

Step 1. Press the Option Menu key (Enhancement key group) to display the OPTIONS menu (left).

Step 2. Select DIAGNOSTICS from the menu. Then select in se- quence: H/W CALIBRATIONS DISK OPERATIONS SAVE TO HARD DISK HW_CAL.ALL.

NOTE

Also save the calibration data to floppy disk. Label the disk with calibration type (ALL), date, and system model and serial numbers. Set the copy protect tab on the disk. Properly safeguard the disk so that it will be available for later use, as needed.

Step 3. Switch the 373XXA power off. Remove the power cord.

Remove/Replace Procedure:

Step 1. Remove the top cover and the large card-cage cover to ex- pose the A1 – A9 PCBs (refer to paragraph 8-4).

Step 2. Remove the A9 PCB from the unit.

Step 3. Locate and remove the BBRAM chip from the A9 PCB. See Figure 8-3.

Step 4. Replace the BBRAM chip on the A9 PCB.

Step 5. Reinstall the A9 PCB, the large card-cage cover, and the top cover.

Step 6. Reconnect power cord. Switch 373XXA power on.

Post Replacement Procedure:

Recall the calibration data saved in the Preliminary step from the floppy disk as follows:

Step 1. Insert the floppy disk with the previously saved Source Frequency and ALC Calibrations Data in the 373XXA floppy disk drive.

Step 2. Select DIAGNOSTICS from the menu (left). Then select in sequence: H/W CALIBRATIONS DISK OPERATIONS RECALL CAL FROM FLOPPY DISKHW_CAL.ALL.

8-8

373XXA MM

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Anritsu 373XXA manual A9 PCB Bbram Chip Remove and Replace, Remove/Replace Procedure, Post Replacement Procedure

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.