What is the maximum safe input level for the Yokogawa AQ6370D?

The Yokogawa AQ6370D has a maximum safe input level of +25 dBm total input power, with a maximum input power of +20 dBm per channel.

How do the standard and high-performance versions of the Yokogawa AQ6370C differ?

The standard AQ6370C-10 has a wavelength accuracy of ±0.02 nm and a dynamic range of 70 dB at ±0.2 nm from peak. The high-performance AQ6370C-20 increases wavelength accuracy to ±0.01 nm and dynamic range to 73 dB at ±0.2 nm from peak.

Yokogawa AQ6370 Series Optical Spectrum Analyzers

3 models with full specifications from Yokogawa.

The Yokogawa AQ6370 series of high-performance bench-top optical spectrum analyzers (OSAs) is designed for testing and characterizing optical components and fiber optic systems. Operating across a broad wavelength range of 600 nm to 1700 nm, these instruments support applications from research and development to manufacturing. The family includes the foundational Yokogawa AQ6370, the Yokogawa AQ6370C, and the Yokogawa AQ6370D. While they share core physical dimensions, display layouts, and a common wavelength range, they differ in wavelength accuracy, interface connectivity, power efficiency, and dynamic range options. Selecting the correct model depends on the specific level of measurement precision, interface configuration, and dynamic range needed for optical component or network testing.

Wavelength Range: 600 to 1700 nm
Display Size: 10.4-inch color LCD (800 x 600)
Bench-top Weight: 19 kg
Minimum Sampling Resolution: 0.001 nm
Level Accuracy: ±0.4 dB (at 1310/1550 nm, -20 dBm input)

Models in this series

Model	Type	Dimensions (W×H×D)	Display	Interfaces
AQ6370	*misc	426 mm × 221 mm × 459 mm	10.4-inch color TFT-LCD (SVGA, 800 × 600 resolution)	GP-IB, RS-232C, Ethernet (10/100Base-TX), USB 1.1 (Host & Device)
AQ6370C	Spectrum Analyzers	426 × 221 × 459	10.4-inch color LCD with SVGA (800 × 600) resolution	GP-IB, RS-232, Ethernet (10/100Base-T), 4 × USB (Type A)
AQ6370D	Spectrum Analyzers	426 (W) x 221 (H) x 459 (D) mm	10.4-inch color LCD (800 x 600 pixels)	GPIB, LAN (10/100Base-TX), USB 1.1 / 2.0 (Type-A x 4), VGA output, Trigger In/Out, Analog Out

Wavelength Range and Optical Performance

All three models in the series—the Yokogawa AQ6370, Yokogawa AQ6370C, and Yokogawa AQ6370D—cover the 600 nm to 1700 nm wavelength range. Across these devices, users can configure wavelength resolution from 0.02 nm up to 2.0 nm across seven settings, with a minimum sampling resolution of 0.001 nm. They also share a consistent level accuracy of ±0.4 dB at 1310 nm and 1550 nm for an input level of -20 dBm.

Accuracy and Dynamic Range Variations

While core measurements are similar, accuracy and dynamic range configurations differ by generation and model subclass:

The original Yokogawa AQ6370 offers a close-in dynamic range of 70 dB (peak ±0.2 nm) and 73 dB (peak ±0.4 nm) at 1520 nm to 1580 nm with a 0.02 nm resolution.
The Yokogawa AQ6370C is divided into the standard AQ6370C-10 and high-performance AQ6370C-20. Wavelength accuracy for the AQ6370C-10 is ±0.02 nm in the 1520 nm to 1580 nm range, while the AQ6370C-20 achieves ±0.01 nm. The AQ6370C-20 also increases close-in dynamic range to 73 dB (at ±0.2 nm) and a typical 78 dB (at ±0.4 nm).
The Yokogawa AQ6370D provides ±0.01 nm wavelength accuracy in the C-band (1520 to 1580 nm) for high-performance configurations, and ±0.04 nm in the C+L band (1520 to 1620 nm) for standard configurations.

Interface and Power Consumption

Physical connectivity and power requirements have evolved across the series:

The Yokogawa AQ6370 operates with a maximum power consumption of approximately 150 VA. It features GP-IB, RS-232C, 10/100Base-TX Ethernet, and USB 1.1 interfaces.
The Yokogawa AQ6370C reduces power consumption to approximately 100 VA and updates the interfaces to include GP-IB, RS-232, 10/100Base-T Ethernet, and four USB Type-A ports.
The Yokogawa AQ6370D consumes approximately 100 VA (up to 150 VA maximum) and expands connectivity with GPIB, LAN (10/100Base-TX), four USB 1.1 / 2.0 Type-A ports, a VGA output, trigger input/output, and an analog output.

Frequently asked questions

What is the maximum safe input level for the Yokogawa AQ6370D?: The Yokogawa AQ6370D has a maximum safe input level of +25 dBm total input power, with a maximum input power of +20 dBm per channel.
How do the standard and high-performance versions of the Yokogawa AQ6370C differ?: The standard AQ6370C-10 has a wavelength accuracy of ±0.02 nm and a dynamic range of 70 dB at ±0.2 nm from peak. The high-performance AQ6370C-20 increases wavelength accuracy to ±0.01 nm and dynamic range to 73 dB at ±0.2 nm from peak.