TROUBLESHOOTING

TROUBLESHOOTING

q

TABLES

Table 5-4.Malfunctions Not Displaying an Error Message (2 of 6)

If the voltage is correct, the Front Panel assembly or the cable between Motherboard connector A20J22 and the

qFront Panel assembly may be defective.

If the voltage is incorrect, the +24V standby power supply may be loaded down by (1) a shorted oven heater for the 100 MHz reference oscillator located on the A3 PCB, (2) a shorted heater for the optional 10 MHz high stability time base (if installed), or (3) a defective Front Panel assembly.

Signal Generator Will Not Turn On

(OPERATE light is ON)

Normal Operation: When the 682XXB/683XXB is connected to the power source, the OPERATE light should illuminate and the instru- ment should power up.

Step 1. Remove the 682XXB/683XXB top cover and the cover over the A18 and A19 PCBs.

Step 2. Connect the negative lead of the DMM to A18TP1 and the positive lead to A18TP3.

Step 3. Check for a +23.3 ￿0.5 volt reading on the DMM.

qIf the voltage is correct, go to step 4.

If the voltage is incorrect or missing, the Front Panel assembly or the cable between Motherboard connector A20J22 and the Front Panel assembly may be defective.

Step 4. Press the front panel RF OUTPUT ON/OFF button. Do the yellow and red LEDs toggle?

If yes, the malfunction may be caused by a failed front

qpanel circuit. Replace the Front Panel assembly.

If the LEDs do not toggle or if both LEDs are lit, the prob- lem may be caused by a malfunction on the A17 CPU PCB.

682XXB/683XXB MM

5-13

Page 179
Image 179
Anritsu 683XXB, 682XXB manual Signal Generator Will Not Turn On Operate light is on

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.