TROUBLESHOOTING

TROUBLESHOOTING

TABLES

Table 5-17.Error Messages 121, 122, 123, 127, 142, and 143 (1 of 2)

A10 ALC

Error 121 Unleveled Indicator Failed

Error 122 Level Reference Failed

Error 123 Detector Log Amp Failed

Error 127 Detector Input Circuit Failed

Description: Error 121 indicates a failure of the circuit that alerts the CPU whenever the RF output power becomes unleveled. Each of the other error messages indicates a problem in the circuitry on the A10 ALC PCB that provides control of the RF output power level.

Step 1. Replace the A10 PCB, and run self-test.

qIf no error message is displayed, the problem is cleared.

If any of the error messages, listed above, is displayed, contact your local ANRITSU service center for assistance.

Error 142 Sample and Hold Circuit Failed

Description: Error 142 indicates a failure of the sample and hold cir- cuitry on the A10 PCB.

Step 1. Set up the 682XXB/683XXB as follows:

a.Press SYSTEM, then Reset.

b.Press MODULATION, then Pulse to go to the Internal Pulse Modulation Status display.

c.Press On/Off to turn on pulse modulation.

Step 2. Disconnect the cable, W122, from A6J6.

Step 3. Using an oscilloscope, verify the presence of a pulse train at A6J6 (sample and hold signal to the A10 ALC PCB) with an output level of 0 volts to +1 volt, a pulse period of 1 ms, and a pulse width of 200 ￿s.

If the signal is present and correct, reconnect cable W122

qto A6J6 and go to step 4.

If the signal is not present or is incorrect, replace the A6 PCB.

Step 4. Disconnect the cable, W122, from A10J1.

Step 5. Using the oscilloscope, verify the presence of the sample and hold signal (pulse train described in step 3) at the end of the cable, W122.

682XXB/683XXB MM

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Anritsu 683XXB, 682XXB manual A10 ALC, Error 142 Sample and Hold Circuit Failed

682XXB, 683XXB specifications

The Anritsu 683XXB and 682XXB series are advanced vector network analyzers (VNAs) renowned for their precision and versatility in characterizing RF and microwave components. Designed for engineers and technicians involved in the development, manufacturing, and testing of high-frequency devices, these analyzers offer state-of-the-art technology that ensures optimal performance in various applications.

One of the hallmark features of the Anritsu 683XXB and 682XXB is their high dynamic range, which allows for accurate measurements of small reflection and transmission coefficients, essential for assessing the performance of complex RF structures. With frequency coverage extending from DC to 70 GHz, these analyzers cater to a broad spectrum of applications, making them suitable for industries such as telecommunications, aerospace, and automotive.

The user-friendly interface of the Anritsu VNAs is complemented by a high-resolution display, which facilitates easy navigation through measurement setups and results. The analyzers feature multiple measurement modes, including S-parameter measurements, time-domain analysis, and noise figure measurements, providing engineers with comprehensive tools for device characterization.

Both the 683XXB and 682XXB implement advanced calibration techniques, including automated calibration and error correction methods, to enhance measurement accuracy. These methods significantly reduce the uncertainties associated with test setups, enabling reliable performance evaluations of components like filters, amplifiers, and antennas.

Anritsu’s proprietary technologies, such as the VectorStar and ShockLine series integration, further empower the 683XXB and 682XXB models. These technologies enable high-throughput testing and improved measurement stability, addressing the needs of modern production environments that demand rapid turnaround times without sacrificing precision.

Additionally, the analyzers come equipped with various connectivity options, including USB, LAN, and GPIB, ensuring seamless integration into automated test systems. This adaptability enhances the analyzers' utility in both laboratory settings and field operations.

In conclusion, the Anritsu 683XXB and 682XXB series vector network analyzers represent the pinnacle of RF and microwave testing technology. With their unmatched precision, comprehensive measurement capabilities, and advanced calibration techniques, these instruments are indispensable tools for professionals striving to push the boundaries of high-frequency device performance and reliability.