SKYSHL SS305T Optical Time Domain Reflectometer User Manual

1. Introduction

The SKYSHL SS305T Optical Time Domain Reflectometer (OTDR) is a crucial instrument designed for certifying the performance of new fiber optic links and diagnosing issues in existing fiber networks. As fiber optic technology advances, OTDR testing methods are essential for building, maintaining, and troubleshooting fiber optic systems.

The SS305T series measures fiber length and overall optical attenuation within a circuit. The analyzed data provides valuable insights into the integrity of the fiber and any passive optical components (such as connectors, splices, splitters, and multiplexers) along the cable path.

Figure 1: Front view of the SKYSHL SS305T OTDR

2. Key Features

• Wavelength & Dynamic Range: Single mode 1310nm/28dB + 1550nm/26dB, supporting a maximum test distance of 80km (50 miles).
• Compact Design: Very compact and convenient for outdoor use.
• Display: 4.3-inch capacitive touch screen for sensitive and intuitive operation.
• Battery: 3.7V/4000mAh lithium battery, providing 11-15 hours of continuous use.
• 12-in-1 Functionality: Integrates OTDR (Auto/Expert), Event Map, 10G PON Split-Wavelength Optical Power Meter, End Status Verification, Multi-Core Test, Stable Optical Source (OLS), Optical Power Meter (OPM), Optical Loss Test, RJ45 Network Cable Length, RJ45 Line Sequence Test, RJ45 Network Cable Search, Fiber End Detection, and Wireless Charging.
• Ease of Use: One-button operation, automatic analysis, and a user-friendly OTDR interface suitable for various skill levels.
• High Resolution: Very short event dead zone (EDZ) of 3.0m and attenuation dead zone (ADZ) of 8.0m, allowing detection of faults on very short optical fibers.
• Universal Interface: 2.5mm universal interface, compatible with APC & UPC SC+FC+ST+LC connectors.
• Analysis Modes: Supports Auto OTDR, Expert OTDR, Event Map, and intelligent graphic analysis of fiber connections.
• Data Storage: Stores up to 800,000 sets of curves (with 8GB micro SD/TF card).
• File Format: Supports .SOR file format.
• Multi-language Support: Supports Chinese, English, German, French, Spanish, Italian, Russian, and Portuguese.

Figure 2: Main menu interface of the SS305T OTDR

3. Package Contents

Upon opening your SKYSHL SS305T OTDR package, please verify that all the following items are included:

• 1 x SS305T OTDR Main Unit
• 1 x SC&FC/UPC Connector (for OTDR port)
• 2 x 2.5mm Universal Connectors (for OPM & VFL ports)
• 4 x Flanges Compatible with APC&UPC (1*FC-FC, 1*FC-SC, 1*FC-LC, 1*FC-ST)
• 2 x FC-FC Patch Cords
• 1 x User's Manual
• 1 x USB Cable
• 1 x Charger
• 1 x Cotton Swab Stick (for cleaning the interface)
• 1 x Oxford Backpack
• 1 x RJ45 Cable Locator
• 1 x RJ45 Remote Module
• 1 x 8GB Micro-SD/TF Card (pre-loaded with electronic instructions and emulation software)

Figure 3: Complete package contents

4. Setup

Follow these steps to prepare your SKYSHL SS305T OTDR for operation:

1. Charge the Device: Before first use, fully charge the OTDR using the provided charger and USB cable. The device features a 3.7V 4000mAh lithium battery.
2. Power On: Press and hold the power button (usually located on the front panel) until the screen illuminates.
3. Access Ports: Open the protective covers on the top of the device to reveal the various ports, including OTDR/OLS, VFL, OPM, LAN, and USB ports.
4. Connect Fiber: Carefully connect the fiber optic cable to the appropriate OTDR port. Ensure the connector type matches (e.g., SC/UPC, FC/UPC). Use the provided SC&FC/UPC connector if needed.

Figure 4: Top view with ports for connection

For a visual guide on connecting the fiber and performing a basic test, please refer to the video below:

5. Operating Instructions

5.1. Performing an Auto OTDR Test

The Auto OTDR function simplifies testing, allowing even untrained technicians to perform accurate measurements quickly.

1. From the main menu, select the "Auto OTDR" icon.
2. On the Auto OTDR screen, select the desired test wavelength (e.g., 1310nm or 1550nm) and test time (e.g., 5s, 15s, 30s).
3. Click the "Auto Test" button to initiate the test. The device will automatically identify the link, set optimal parameters, and begin data acquisition.
4. Once the test is complete, the OTDR trace will be displayed. You can click the "Cursor" button to select A/B cursors for detailed analysis of specific points on the trace.
5. To view a simplified graphical representation of events, click the "Event Map" button.

Figure 5: OTDR test results and event map display

5.2. Interpreting OTDR Test Curves and Events

The OTDR trace provides a wealth of information about the fiber link:

• Slope of the Trace: Represents the attenuation coefficient of the fiber, calibrated in dB/km. A steeper slope indicates higher attenuation.
• Events: Connectors and splices are identified as "events." These typically show a loss.
• Reflective Peaks: Connectors and mechanical splices will also exhibit a reflective peak. The height of this peak indicates the amount of reflection at that event.
• Dead Zones: The event dead zone (EDZ) and attenuation dead zone (ADZ) refer to the minimum distance between two events that the OTDR can distinguish. The SS305T boasts very short dead zones (3.0m EDZ, 8.0m ADZ) for precise fault detection.

Figure 6: Detailed OTDR traces with event information

5.3. Event Map/Graphics Analysis Mode

The Event Map simplifies fiber fault analysis by providing a graphical representation of the network topology. It uses intelligent algorithms to dynamically locate and identify all network components and fault locations with maximum resolution.

• Navigate to the "Event Map" function from the main menu or after an OTDR test.
• The screen will display a simplified diagram of the fiber link, showing connectors, splices, and any detected faults.
• Each event will be labeled with its type, distance, and loss, often indicating a "PASS" or "FAIL" status for quick assessment.

Figure 7: Event Map displaying fiber link status

5.4. Other Integrated Functions

The SS305T offers a comprehensive suite of tools for fiber optic testing:

• 10G PON OPM: Measures optical power at 1490nm & 1577nm (range: +10～-40dBm).
• Optical Power Meter (OPM): Measures optical power from 800nm to 1700nm (range: -50~+26dBm).
• Stable Optical Source (OLS): Provides stable light at 1310nm and 1550nm.
• Visual Fault Locator (VFL): 10km range for visual fault detection.
• RJ45 Cable Test: Includes functions for cable length, line sequence, and cable search for network cables.

Figure 8: Overview of the 12-in-1 integrated functions

6. Maintenance

Proper maintenance ensures the longevity and accuracy of your SKYSHL SS305T OTDR:

• Connector Cleaning: Always keep fiber optic connectors clean. Use the provided cotton swab stick and appropriate fiber optic cleaning solutions to clean the OTDR ports and fiber connectors before each use. Contaminated connectors are a primary cause of inaccurate measurements and potential damage.
• Battery Care: Recharge the 3.7V/4000mAh lithium battery regularly. Avoid completely draining the battery or leaving it uncharged for extended periods. For long-term storage, charge the battery to approximately 50-70%.
• Software Updates: Check the manufacturer's website periodically for any available firmware or software updates to ensure optimal performance and access to new features.
• Storage: Store the device in its Oxford backpack in a cool, dry place, away from direct sunlight, extreme temperatures, and humidity.
• Physical Protection: The device is designed for outdoor use, but avoid dropping it or subjecting it to severe impacts. Keep protective covers on ports when not in use.

Figure 9: The SS305T features a long-lasting rechargeable battery

7. Troubleshooting

If you encounter issues with your SS305T OTDR, consider the following common troubleshooting steps:

If the problem persists after attempting these solutions, please contact SKYSHL customer support for further assistance.

8. Specifications

9. User Tips

• Single Mode Operation: The SS305T-2A1 model is designed for single-mode (SM) fiber testing at 1310nm and 1550nm. It does not support multimode (MM) wavelengths like 850/1300nm. Ensure your application uses single-mode fiber for accurate results.
• Connector Compatibility: The device is compatible with both APC and UPC connectors (SC, FC, ST, LC types). When connecting, ensure the correct adapter is used and that the connector is clean to prevent signal loss and damage.
• Language Settings: The device supports multiple languages. If the interface is not in your preferred language, navigate to the 'System' settings to change it.

10. Warranty & Support

SKYSHL is committed to providing high-quality products and excellent customer service. We offer a 3-year free replacement warranty for this product. If you encounter any problems, please contact our professional after-sales team, available 24 hours a day, for comprehensive technical guidance.

We also provide detailed product information and usage videos, including user manuals, test reports, calibration certifications, operation videos, and maintenance videos, to help you get started immediately.

For support, please refer to the contact information provided with your purchase or visit the official SKYSHL website.