| Model | JW3302S | JW3302SJ |
| Measurement Wavelength | 1310nm/1550nm±20nm | 1310/1550nm | 1610nm±20nm (in-line test) |
| Fiber Type | G.652 SM fiber | G.652 SM fiber |
| Dynamic Range | 24dB/22dB | 24dB/22dB | 24dB |
| Event Blind Zone | 3m |
| ATT Blind Zone | 8m |
| Test Range | 3m to 60km |
| Pulse Width | 3ns to 10us | 5ns to 10us |
| Ranging Accuracy | ±(1m sampling interval 0.005% × test distance) |
| Linearity | ±0.2dB/dB |
| Sampling Points | 16k to 128k |
| Sampling Resolution | 0.05m to 8m |
| Reflection Accuracy | ±3dB |
| Data Storage | Internal: ≥600 records External: TF card |
| Optical Connector Type | FC/PC (interchangeable SC, ST) or FC/APC (interchangeable SC, ST) | FC/APC (interchangeable SC, ST) |
| Optical Power Meter (OPM) |
| Wavelength Range | 800nm to 1700nm |
| Interface Type | Universal joint FC/SC/ST |
| Measurement Range | -50dBm to 26dBm |
| Uncertainty | ±5% |
| Frequency Identific | CW/270Hz/330Hz/1kHz/2kHz |
| Calibration Wavelength | 850/980/1300/1310/1490/1550/1625/1650nm | 850/1300/1310/1490/1550/1577/1625nm |
| Optical Light Source (OLS) |
| Laser Type | FP-LD |
| Output Wavelength | 1310/1550nm | 1310/1550nm | 1610nm ±20nm |
| Output Power | ≥-5dBm |
| Modulation Frequency | 270Hz/330Hz/1kHz/2kHz |
| Stability | CW, ±0.5dB/15min (tested after 15min warm-up) |
| Optical Connector Type | FC/PC (interchangeable SC, ST) or FC/APC (interchangeable SC, ST) | FC/APC (interchangeable SC, ST) |
| Visual Fault Locator (VFL) |
| Wavelength | 650nm ±20nm |
| Output Power | ≥10mW |
| Operating Mode | CW/1Hz/2Hz |
| Optical Connector Type | FC/SC/ST |
| General |
| Display | 3.5 inch color LCD screen |
| Power Supply | 3.7V 4000mAh lithium battery, power supply adapter: 5V DC 2A |
| Battery Life | Standby: >20h, Measuring time: >12h |
| Operating Temperature | -10℃ to 50℃ |
| Storage Temperature | -40℃ to 70℃ |
| Relative Humidity | 0 to 95% (non-condensing) |
| Weight | ≤350g |
| Dimensions | 188×88×44mm |