1. Introduction
The Noyafa NF-308S is a versatile network monitoring cable tester designed for professionals and enthusiasts alike. It combines multiple functions to efficiently test and troubleshoot various cable types, including 5E, 6E, telephone, coaxial, and USB cables. Key functionalities include cable fault testing, length measurement, port identification, and polarity testing.
Figure 1: Noyafa NF-308S Wire Fault Locator components.
2. Product Structure
The NF-308S consists of three main units: the Emitter (main tester), the Receiver (probe), and the Remote unit. Familiarize yourself with the components and their functions:
Figure 2: Detailed product structure and port layout.
Emitter (Main Tester)
- LCD Screen: Displays test results, wiremap, length measurements, and other information.
- Function Buttons: Used for navigation and selecting test modes (WireMap, Pair&Length, Coax/Tel, Port Flash).
- Scan Button: Initiates scanning for cable tracing.
- PAIR&L Button: Used for pair and length measurements.
- Status Indicator: Shows the current operational status.
- Ports: RJ45 SCAN, RJ11 SCAN, USB SCAN, BNC, MAIN RJ45, Port Flash, DC Power input (9V-12V 0.5-2A).
Receiver (Probe)
- Probe: Used to trace cables and detect signals.
- Lamp: Provides illumination for working in dark environments.
- Lamp Button: Activates the lamp.
- Push to Test Button: Activates the receiver for tracing.
- VOL (Volume) Control: Adjusts the audio output for tracing.
- Speaker: Emits audio tones for cable tracing.
Remote Unit
- Ports: RJ45, BNC.
- Used in conjunction with the Emitter for wiremap and length testing of installed cables.
3. Setup and Powering On
Before using your NF-308S, ensure it is properly powered and configured.
3.1 Battery Installation
The NF-308S requires a 9V alkaline battery (NEDA 1604/6F22 DC9V) for both the Emitter and Receiver units. Batteries are typically not included in the package and must be purchased separately.
- Locate the battery compartment on the back of the Emitter and Receiver units.
- Open the battery cover.
- Insert a 9V alkaline battery, ensuring correct polarity (+/-).
- Close the battery cover securely.
3.2 Initial Power On
Press the power button on the Emitter unit to turn it on. The LCD screen will light up, displaying the current software version (e.g., Ver.6.8 NF-308) and a menu of test options.
Video 1: Demonstration of the NF-308S in operation, including cable continuity and fault distance measurement.
4. Operating Instructions
The NF-308S offers several testing modes for comprehensive cable analysis.
4.1 Wiremap Testing (Cable Continuity)
This function checks for open circuits, short circuits, jumper wires, and reverse connections in RJ45, RJ11, and BNC cables.
- Connect one end of the cable to the appropriate port on the Emitter (e.g., RJ45, RJ11, BNC).
- Connect the other end of the cable to the Remote unit.
- On the Emitter, select "1. WireMap" from the menu using the function buttons.
- Press the "SCAN" button to start the test.
- The LCD will display the wiremap results, indicating "PASS" for good cables or identifying specific faults (e.g., "Short 36" for a short circuit on pair 3-6, "Wire Map: FAIL" for a broken pair).
Figure 3: Wiremap test results for various cable conditions.
4.2 Cable Length Measurement and Fault Distance
Measure the length of RJ45 cables and pinpoint the location of a break or fault.
- Connect one end of the RJ45 cable to the Emitter's RJ45 port. The remote unit is not required for length measurement.
- On the Emitter, select "2. Pair&Length" from the menu.
- Press the "SCAN" button.
- The LCD will display the length for each pair. If a break is detected, it will show "Open" followed by the pair number and the distance to the break (e.g., "Open 45 30.5m"). The accuracy is approximately 98% for lengths up to 350m.
Figure 4: Cable length and broken distance measurement.
4.3 Port Finder (Hub Blink)
Quickly locate the corresponding network port on a Hub or Switch by making its light flash.
- Connect the Emitter to a network port on the Hub/Switch using an RJ45 cable.
- On the Emitter, select "4. Port Flash" from the menu.
- The Emitter will send a signal that causes the connected port's LED on the Hub/Switch to flash simultaneously, allowing for easy identification.
Figure 5: Using the Port Finder function to locate a network port.
4.4 Cable Tracing (Hunting)
Locate specific cables among a bundle of unknown cables using the Receiver (probe).
- Connect the cable to be traced to the appropriate port on the Emitter.
- Turn on the Receiver unit.
- Select the "SCAN" mode on the Emitter.
- Use the Receiver's probe to scan the bundle of cables. The Receiver will emit an audible tone when it detects the signal from the Emitter, indicating the target cable. Adjust the volume as needed.
Figure 6: Tracing an active cable with the NF-308S.
4.5 Polarity Testing
Measure DC voltage (0.5V-60V) and determine polarity.
- Connect the alligator clips to the Emitter's polarity test terminals.
- Attach the clips to the voltage source you wish to test.
- The LCD will display the DC voltage and indicate the polarity (positive/negative) for the red and black clips.
Figure 7: Polarity testing with the NF-308S.
5. Maintenance
Proper maintenance ensures the longevity and accuracy of your NF-308S.
- Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents.
- Storage: Store the device in a cool, dry place, away from direct sunlight and extreme temperatures.
- Battery Replacement: Replace batteries when the low battery alarm function activates or when the device is not in use for extended periods to prevent leakage.
- Calibration Data: The device has memory and storage for calibration data. Ensure this data is maintained for accurate measurements.
- Avoid High Voltage: Do not connect high voltage lines to the device to prevent damage.
- Handle with Care: The device contains sharp parts (e.g., probe). Handle with care to avoid injury.
6. Troubleshooting
This section addresses common issues you might encounter with the NF-308S.
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Low or dead battery; incorrect battery installation. | Replace the 9V battery, ensuring correct polarity. |
| "Wire Map: FAIL" or specific fault displayed. | Open circuit, short circuit, cross-over, or reverse connection in the cable. | Inspect the cable and connectors for damage. Repair or replace the faulty cable. |
| Inaccurate cable length measurement. | Cable length exceeds 350m for optimal accuracy; uncalibrated device. | Ensure cable is within the recommended range. Perform calibration if necessary (refer to user manual for calibration procedure). |
| Cannot find target cable with Receiver. | Emitter not in SCAN mode; Receiver volume too low; interference. | Ensure Emitter is in SCAN mode. Increase Receiver volume. Minimize interference from other electronic devices. |
| Port Finder not working. | Incorrect port selected on Emitter; Hub/Switch not compatible or port is faulty. | Ensure "Port Flash" mode is selected. Verify the Hub/Switch port is functional. |
Figure 8: Common cable issues addressed by the NF-308S.
7. Specifications
Detailed technical specifications for the Noyafa NF-308S.
| Feature | Description / Value |
|---|---|
| Model | NF-308S |
| Type | Multifunction Network Tester |
| Indicator | LCD 53x25 mm, with backlight |
| Scan Cable Type | RJ45/RJ11/BNC/USB/Metal cables |
| CONT Cable Type | RJ45/BNC cable |
| Cable Type for Length | RJ45 Cable |
| Length Testing Accuracy | 97% |
| Length Testing Range | < 350m |
| Ports on Transmitter | RJ45 SCAN, RJ11 SCAN, USB SCAN, BNC, MAIN RJ45, Port Flash |
| Ports on Remote | RJ45, BNC |
| Remote Units | 1 |
| Calibration Cable Length | > 10m |
| Power Supply | 9V Alkaline battery (NEDA 1604/6F22 DC9V x 1pcs for Emitter and Receiver) or power adaptor |
| Max. Distance of Transmission | 2 km |
| Max. Distance of Cable Map | 1 km |
| Max. Working Current | Less than 70mA (Emitter & Receiver) |
| Tone Frequency | 225 Hz |
| Tone Mode | 2 Tone adjustable |
| Max. Signal Voltage | 15Vp-p |
| Voltage Protection | AC 60V/DC 42V |
| Emitter Dimension (LxWxD) | 185x80x32mm |
| Receiver Dimension (LxWxD) | 218x46x29 mm |
| Remote Unit Dimension (LxWxD) | 107x30x24mm |
| Accessories Included | User manual, carry bag, alligator clips, RH23 adapter, telephone line adapter, certification card. |
8. User Tips
Here are some helpful tips for getting the most out of your Noyafa NF-308S:
- Cable Management: When tracing cables in a dense environment, try to separate bundles as much as possible to improve accuracy and reduce interference.
- Volume Adjustment: Use the volume control on the Receiver to fine-tune the audio signal, especially in noisy environments or when tracing over longer distances.
- PoE Safety: The device is designed to track active cables, including those connected to PoE switches. However, always exercise caution and ensure proper connections to avoid damage to the tester or network equipment.
- Regular Battery Check: Periodically check the battery levels, even if not actively using the device, to ensure it's ready for use and to prevent battery leakage.
- Protective Case: Always store the NF-308S in its provided carry bag to protect it from dust, impacts, and environmental damage.
9. Warranty and Support
NOYAFA products are designed for reliability and performance. For warranty information, technical support, or service inquiries, please refer to the official NOYAFA website or contact their customer service directly. Keep your purchase receipt as proof of purchase for warranty claims.
