YOKOGAWA AQ7280 Optical Time Domain Reflectometer

Main interface operation:

Function selection: Select OTDR, OPM, VLS and other functions through the knob/directional keys/touch screen, press ENTER or soft key to confirm;

Measurement mode: Taking OTDR as an example, Simple mode (only requires automatic configuration of wavelength, distance range/pulse width, etc.), Average measurement (start by pressing AVG key to improve signal-to-noise ratio, can be manually stopped);

Screen interaction: The touch screen supports clicking (selecting), dragging (adjusting display ratio), and pinching (zooming waveform), with soft keys corresponding to the menu on the right, and the ESC key returning to the previous level.

Data Management and Fault Handling

Data storage: Measurement results can be stored in formats such as SOR (waveform), CSV (data), BMP/JPG (image), etc., supporting internal storage (≥ 1000 waveforms), USB/SD card;

Abnormal startup handling: If the startup is not completed properly, check the AC adapter connection, battery installation, and power button pressing time (≥ 2 seconds). If the issue persists, contact the dealer for repair.

Key specification parameters

Host core specifications

Project specifications

Display screen 8.4-inch color TFT LCD (capacitive touch), resolution 800 × 600 pixels

Interface USB2.0 (TYPE A × 2, TYPE B (Mini) × 1), LAN (optional, 10/100BASE-T), SD card slot (supports SDHC)

Size approximately 287mm (W) × 210mm (H) × 80mm (D) (excluding protruding parts)

Weight approximately 2.2kg (including battery, excluding OTDR unit/module)

Working environment temperature -10~50 ℃ (AC power supply 0~40 ℃, battery charging 0~35 ℃), humidity 0~90% (no condensation), altitude ≤ 4000m

Key parameters of OTDR unit (universal)

Sampling resolution: minimum 2cm;

Sampling points: maximum 256000 points;

Distance measurement accuracy: ± (0.75m+measurement distance × 2 × 10 ⁻⁵+sampling resolution);

Event dead zone: approximately 0.6m (typical value when pulse width is 3ns);

Attenuation dead zone: about 3.5-4m (typical value when the pulse width is 10ns).

Module specifications (OPM/VLS)

Module model, core parameters, and specifications

AQ2780 (OPM) power range CW: -70~+10dBm; CHOP：-70~+7dBm

AQ2781 (high-power OPM) power range CW: -50~+27dBm; CHOP：-50~+24dBm

AQ2780V (OPM+VLS) VLS parameter wavelength 650 ± 20nm, output power ≥ 5mW (CW/CHOP mode)

AQ4780 (VLS) laser class 3R, modulation mode CW/approximately 2Hz CHOP