FUNCTIONAL

ALC/AM/PULSE

DESCRIPTION

MODULATION

NOTE

The instrument uses two internal level de- tection circuits. For frequencies <2 GHz (￿2.2 GHz for 682X5B/683X5B models), the level detector is part of the Down Con- verter. The signal from this detector is routed to the A10 ALC PCB as the Detector 0 input. For frequencies ￿2 GHz (>2.2 GHz for 682X5B/683X5B models), the level de- tector is part of the main Directional Cou- pler. The signal from this detector is routed to the A10 ALC PCB as the Detector 1 in- put.

The Level Reference DAC, under the control of the CPU, provides the RF level reference voltage. By setting the output of this DAC to the appropriate voltage, the CPU adjusts the RF output power to the level selected by the user. Leveled output power can be set over a maximum range of up to 28 dB (up to 131 dB with the optional 110 dB step attenuator) using front panel controls or the GPIB. Instruments with Option 15B (High Power) provide leveled out- put power over a maximum range of up to 22 dB (up to 125 dB with the optional 110 dB step attenuator).

External Leveling

In the external leveling mode, an external detector or power meter monitors the RF output level of the 682XXB/683XXB instead of an internal level detec- tor. The signal from the external detector or power meter goes to the A10 ALC PCB from the front or rear panel inputs. The ALC controls the RF power output level as previously described.

ALC Slope

During analog sweeps (683XXB only), a slope-vs- frequency signal, from the A12 Analog Instruction PCB, is summed with the level reference and detec- tor inputs into the ALC loop. The Slope DAC, under the control of the CPU, adjusts this ALC slope sig- nal to compensate for an increasing or decreasing output power-vs-frequency characteristic caused by the level detectors and (optional) step attenuator. In addition, the Slope DAC lets the user adjust for the slope-vs-frequency characteristics of external com- ponents.

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682XXB/683XXB MM

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Anritsu 682XXB, 683XXB manual External Leveling, ALC Slope

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.