# Advantest TQ8325 Digital Optical Wavelength Meter (Pre-Owned) # Advantest TQ8325 Digital Optical Wavelength Meter (Pre-Owned) ## Key Features At A Glance - Maximum input level +3 dBm peak power across the full 0.48 μm to 1.6 μm range — exceed at risk of detector damage - Wavelength measurement from 0.48 μm to 1.65 μm and frequency measurement from 181 THz to 625 THz without changing input connectors - Measurement accuracy of ±5 ppm with display resolution down to 0.001 nm / 100 MHz for laser sources - Built-in deviation (drift) measurement mode displays difference between reference and current readings for stability characterization - Measures CW laser, LED, high-frequency intensity-modulated light (≥3 MHz), and chopped light (1 Hz to 500 Hz) - GPIB (IEEE-488) interface and D/A analog output standard for ATE integration and chart recorder logging - Five readings per second sampling rate with 10-measurement running average mode for stable readings on noisy sources - Auto-resolution function adjusts displayed digits based on spectral width of the input light The Advantest TQ8325 Digital Optical Wavelength Meter is a Michelson-interferometer-based instrument designed for high-precision measurement of laser and LED wavelengths and optical frequencies. It uses a stabilized helium-neon reference laser (0.6329914 μm in vacuum) and counts interference fringes against the input signal as a moving mirror sweeps the optical path, deriving the wavelength of the input light by ratiometric comparison. The instrument compensates for the wavelength-dependent refractive index of air to report wavelength values referenced to vacuum or air as appropriate for the application. The TQ8325 is used for characterizing laser diode and LED emission wavelength in fiber-optic component manufacturing, verifying optical source wavelength in telecom and datacom development labs, measuring wavelength drift in tunable laser sources, and providing reference wavelength readings for tuning of WDM and DWDM light sources. The deviation measurement mode supports stability and aging studies on laser sources by displaying the difference between a stored reference reading and the current measurement. ValueTronics has been sourcing and supporting fiber-optic test instruments since 1992 from our 20,000 sq ft secure warehouse at 1675 Cambridge Drive, Elgin, Illinois. Optical wavelength meters like the TQ8325 are inspected, function-verified, and made ready for shipment by our in-house team before leaving the facility, so the unit you receive matches the condition stated in your quote. ## Brand Heritage Advantest Corporation, headquartered in Tokyo, Japan, has manufactured precision test and measurement instruments since 1954 (originally as Takeda Riken Industry Co., Ltd., adopting the Advantest name in 1985). The company continues to operate independently as a publicly traded Japanese measurement instrument manufacturer. ## Accessories Supplied - Power cable (1) - Fuse 2181.25 (2, for Opt.00 / 100 VAC specification) or Fuse 218.630 (2, for Opt.40 / 200 VAC specification) - Instruction manual E8325 (English version) - Label for Class 1 Laser Product MNS-E0168 ## Product Core & Specifications Specification Value Optical Specifications Measurement Wavelength Range 0.48 µm to 1.0 µm (short wavelength band); 1.0 µm to 1.65 µm (long wavelength band) Measurement Frequency Range 300 THz to 625 THz (short wavelength band); 181 THz to 300 THz (long wavelength band) Measurement Input Level \-15 dBm to +3 dBm (0.48 µm to 0.6 µm); -23 dBm to +3 dBm (0.6 µm to 1.65 µm); -27 dBm to +3 dBm (1.2 µm to 1.6 µm) Display 7 digits (decimal), green LED Display Resolution 1 nm, 0.1 nm, 0.01 nm, 0.001 nm / 100 GHz, 10 GHz, 1 GHz, 100 MHz Auto-Resolution The resolution measured by spectral width of measured light varies automatically Measurement Wavelength Accuracy ±wavelength spectral width (nm) × 5/100 ± 5 ppm ± 1 count Measurement Frequency Accuracy ±Frequency spectral width (GHz) × 5/100 ± 5 ppm ± 1 count Measurement Stability ±1 count for AVG mode ON AVG Mode Displays the running average in 10 measurements Sampling Rate 0.2 sec Optical Input FC/PC, GI 50/125 High Frequency Modulated Light Measurement Modulation Frequency Range 3 MHz or above Sensitivity \-15 dBm average power (0.48 µm to 0.6 µm); -23 dBm average power (0.6 µm to 1.6 µm) Maximum Input Level +3 dBm peak power (0.48 µm to 1.6 µm) CHOP Light Measurement Measurable CHOP Light Frequency Range 1 to 500 Hz Resolution 1 THz to 1 GHz (frequency), 1 nm to 0.01 nm (wavelength) Maximum Input Level \-5 dBm peak power (for 0.85 µm); -5 dBm peak power (for 1.3 µm) D/A Output Number of Converted Digits Three lower display digits Output Voltage 0 V to 0.999 V (approx. 1 mV/count) D/A Offset Full Scale/2 (+0.5 V) Response Approx. 150 ms Output Impedance Approx. 670 Ω Conversion Accuracy ±3 mV (at temperature of 23°C ±5°C and humidity of 85% or less) Interface GPIB Standard equipment, IEEE standard 488-1978 Analog Output Analog conversion output of lower three display digits (BNC connector) General Specifications Operating Conditions 10°C to +40°C, relative humidity of 85% or less Temperature Range (Accuracy Guaranteed) 25°C ±10°C Power Supply 90 to 132 VAC, 50/60 Hz (198 to 250 V usable range depending on specification) AC Power Frequency Range 48 Hz to 66 Hz Power Consumption 52 VA or less Dimensions Approx. 300 (W) × 132 (H) × 450 (D) mm Mass Approx. 12 kg Laser Classification Class 1 Laser Product **Important:** Maximum input level: +3 dBm peak power across the full 0.48 μm to 1.6 μm wavelength range. Sensitivity is duty-cycle dependent for pulsed light — a 50 % duty pulse train sees 3 dB reduced average-power sensitivity.**Important:** This product is a Class 1 Laser Product. Performance of procedures other than those specified in the manual may result in hazardous radiation exposure.**Important:** When the fiber is not inserted, cover the terminal with the cap to prevent dust and laser radiation from the inside of the TQ8325.**Important:** Input light must not exceed the input level range in either the LASER or LED measurement mode.**Important:** Accuracy is guaranteed only for a temperature of 25°C ±10°C. Do not expose the TQ8325 to direct sunlight, and keep it in a well-ventilated room.**Important:** The laser tube has a lifetime of 10,000 hours. After powering on, a message of "Err rE" is displayed to indicate self diagnosis failure. In this case, contact the sales dealer or the support office.**Important:** Fuse rating depends on line voltage configuration: Opt.00 (100 to 120 V) uses Slow-blow T 1.25 A/250 V; Opt.40 (220 to 240 V) uses Slow-blow T 0.63 A/250 V. Be sure to replace with a fuse of the correct rating.**Important:** No operator serviceable parts inside. Servicing to be provided by trained individuals. For maintenance or inspection of the TQ8325's inside or the replacement of various parts other than fuse, contact your nearest ADVANTEST dealer.**Important:** To maintain or clean the device, do not use any solvent which may degrade plastics (organic solvent such as benzene, toluene and acetone).Recommended pairing: Advantest TQ8215 / TQ82014 / Q82018A optical power meter and sensor combinations, as named in the TQ8325 performance test equipment list, for verifying input level during wavelength accuracy measurements. ## About this used unit - Warranty included - Functional verification included - Standard Calibration Upgrade Options: No Calibration Required, NIST Traceable, Z540.1 or ISO 17025 with Data, Z540.3 Guardbanding with Data. - Note that unnecessary accessories may not be included (contact Test Architect to confirm). **Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.** ## Details - **Price:** 0.0 USD - **Vendor:** Advantest - **Type:** Pow Met - **Tags:** Advantest, Manufacturers, Meters & DAQ, Other, product_manual_group_3, Product_used ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 0.00 USD | In stock | ## Images - Advantest TQ8325 Digital Optical Wavelength Meter (Pre-Owned) --- > Source: [ValueTronics](https://valuetronics.com/products/tq8325-advantest-meter-used) > Updated: 2026-05-30