FUNCTIONAL

RF DECK

DESCRIPTION

ASSEMBLIES

coupler in the switched filter path of high power switched filter assemblies provides the RF signal for the source quadrupler module (refer to Figure 2-5). Whenever an instrument is generating RF signals of >40 GHz, a RF signal is coupled out via J4 to the source quadrupler module.

The switched low-pass filters provide rejection of the harmonics that are generated by the YIG-tuned os- cillator. The 2 to 20 GHz (>2.2 to 20 GHz for 682X5B/683X5B models) RF signal from the modu- lator has four filtering paths and a through path. The four filtering paths are 3.3 GHz, 5.5 GHz,

8.4 GHz, and 13.5 GHz. Signals above 13.5 GHz are routed via the through path.

After routing through the appropriate path, the 2 to 20 GHz (>2.2 to 20 GHz for 682X5B/683X5B models) RF signal is multiplexed by the PIN switches and goes via a 20 GHz low-pass filter to the switched fil- ter assembly output connector J2. The 0.01 to 2 GHz (0.5 to 2.2 GHz for 682X5B/683X5B models) RF sig- nal, from the down converter, is received at connec- tor J1, then multiplexed through the same path to the switched filter output.

From J2, the RF signal goes to either the directional coupler (￿20 GHz models) or the input connector J1 on the switched doubler module (>20 GHz models).

0.01to 2 GHz The 0.01 to 2 GHz Down Converter assembly (Fig-

Down

ures 2-4 and 2-5) contains a 6.5 GHz VCO that is

Converter

phase-locked to the 500 MHz reference signal from

 

the A3 Reference Loop PCB. The 6.5 GHz VCO’s

 

phase-lock condition is monitored by the CPU. The

 

6.5 GHz VCO is on at all times; however, the down

 

converter amplifier is powered on by the A13 YIG

 

Driver PCB only when the 0.01 to 2 GHz frequency

 

range is selected.

 

During CW or swept frequency operations in the

 

0.01 to 2 GHz frequency range, the 6.51 to 8.5 GHz

 

RF signal output from J3 of the switched filter as-

 

sembly goes to input connector J1 of the down con-

 

verter. The 6.51 to 8.5 GHz RF signal is then mixed

 

with the 6.5 GHz VCO signal resulting in a 0.01 to

 

2 GHz RF signal. The resultant RF signal is fed

 

through a 2 GHz low-pass filter, then amplified and

 

routed to the output connector J3. A portion of the

 

down converter’s RF output signal is detected,

2-24

682XXB/683XXB MM

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Anritsu 682XXB, 683XXB manual Down
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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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