A4 Coarse Loop, A5 Fine Loop, A11 FM A7 YIG Loop

FUNCTIONAL	FREQUENCY
DESCRIPTION	SYNTHESIS

A3 Reference Loop

A4 Coarse Loop

10 MHz	10 MHz			A5 Fine Loop
			Phase
			Phase
		Frequency	Error	206 - 391 MHz

10 MHz REF In
Phase/	10 MHz	÷10	10 MHz
Frequency		÷10

÷10

1 MHz

÷100	Synthesizer	VCO
	Synthesizer	VCO
100 kHz

	Detector
	Phase
	Error
10 MHz	100 MHz	100 MHz	500 MHz
10 MHz	Reference		x5
Hi-Stability	Reference		x5
Hi-Stability	Oscillator
XTAL Oscillator	Oscillator
XTAL Oscillator
(Optional)

Divider

Control

Phase/

Frequency

Detector

1 MHz

Frequency

Divider

Phase

Error

10 - 61 MHz

500 MHz

Coarse

Loop

Oscillator

439 - 490 MHz

÷2

219.5 -		Phase/
245 MHz		Phase/
245 MHz		Frequency
		Frequency
		Detector

	Phase Error

		26.84 MHz
		VCXO

100 kHz

Digital

Synthesizer

9 - 10 MHz

		Phase
Phase/		Phase
Phase/		Error
Frequency		Error


Detector

Fine

Loop

Oscilator

215-

400 MHz

÷10

21.5 - 40 MHz

FM Sweep (From A12 PCB)

A11 FM

A7 YIG Loop

SRD	1.9755 to 20 GHz	Sampler
219.5 - 245 MHz	Harmonics

FM In (Front Panel or Rear Panel)

Internal FM (From A8 PCB)

FM Sweep

÷128

21.5 -

40 MHz IF

COIL

DRIVER

LPF

YIG Loop Error

	Phase/
	Frequency	÷128
	Detector	÷128
	Detector	21.5 - 40 MHz
		21.5 - 40 MHz

Sampled 2 - 20 GHz RF

Tune

(From A12 PCB)

+18VG

A13 YIG Driver

Main

Coil

Drivers

Bias

Regulators

	P/O Switched Filter
	YIG - Tuned
FM	Oscillator
FM
Main	2 - 20 GHz
Bias	RF Out
Bias

Modulator Pulse

Contol

Figure 2-2.Block Diagram of the Frequency Synthesis Subsystem

682XXB/683XXB MM

2-11

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.

Anritsu 683XXB A4 Coarse Loop, A5 Fine Loop, A11 FM A7 YIG Loop, A13 YIG Driver, Switched Filter

Models: 682XXB 683XXB

FUNCTIONAL

DESCRIPTION

A4 Coarse Loop

A5 Fine Loop

VCO

VCXO

A11 FM

A7 YIG Loop

SRD

LPF

A13 YIG Driver

P/O Switched Filter

Figure 2-2.Block Diagram of the Frequency Synthesis Subsystem

682XXB, 683XXB specifications