TROUBLESHOOTING

TROUBLESHOOTING

TABLES

Table 5-26.Error Message 147

Error 147 Internal FM circuitry failed

Description: Indicates a failure of the internal frequency modulation function. The 682XXB/683XXB may or may not provide frequency modulation of the RF output signal using modulating signals from an external source.

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

a.Press SYSTEM, then Reset.

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

c.Press On/Off to turn internal frequency modulation on.

Step 2. Using an oscilloscope, verify the presence of a 10 volt peak to peak sine wave signal with a period of 100 ￿s at the rear panel FM OUT connector.

qIf present, replace the A11 PCB. If not present, replace the A8 PCB.

Table 5-27.Error Message 148 (1 of 2)

Error 148 Pulse 40 MHz reference circuitry failed.

Description: Indicates a failure of the pulse generator 40 MHz oscilla- tor circuitry. The pulse generator may still function; however, the

40 MHz oscillator is not phase locked to the 10 MHz reference time- base. The pulse modulation function may or may not operate. Error 106 (Power Supply not Phase-locked) may also be displayed.

Step 1. Disconnect cable W108 at A6J1.

Step 2. Using an oscilloscope, verify the presence of a 10 MHz at the end of cable W108.

qIf present, replace the A6 PCB. If not present, go to step 3.

Step 3. Reconnect cable W108 to A6J1 and disconnect it at A5J4.

Step 4. Using the oscilloscope, verify the presence of a 10 MHz TTL signal at A5J4.

qIf present, replace the cable W108. If not present, go to step 5.

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682XXB/683XXB MM

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Anritsu 682XXB, 683XXB manual Error 147 Internal FM circuitry failed, Error 148 Pulse 40 MHz reference circuitry failed
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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.
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