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ALPSAT RJ45 Network Cable, Fiber Cable and Low Voltage Cable Tester
ALPSAT AS328 is a professional test and measurement device developed for technical personnel installing and maintaining security monitoring systems, communication cabling, network (structured) cabling, fiber optic cables, and other low-voltage systems .

Continuity and numbering tests on network cables , encryption checks for RJ45 components , and cable tracing functionality. Time Domain Reflectometer (TDR) support to utilize the durability and attenuation (weakening) of network cables . digital multimeter feature, it can display voltage, resistance, current, and capacitance indicators. TDR cable testing and level testing of coaxial 75Ω and BNC cables . Also includes PING testing , IP address scanning , port flashing , standard and non-standard PoE equipment details , and PoE power online test functions. In addition, it features an Optical Power Meter (OPM) and a Visual Fault Detection Device (VFL) for the installation and maintenance of fiber optic cabling systems.
SPECIFICATIONS
- Main unit and cable tracker :
4-inch color IPS touchscreen , 800×480 resolution.
Both the main unit and the cable monitor have built-in foldable batteries . - Network cable continuity test :
RJ45 connector encryption check and network cable length testing are integrated into a single device. - Cable tracing and UTP cable testing :
Enables simultaneous and highly accurate identification of cables, preventing false assessments. - Inductive NCV scanning function :
AC 12–1000V, 50/60Hz. Dual audible and visual alarm. Recording of phase (live) and neutral (neutral) line separation. - RJ45 TDR cable testing : Detects breaks and short circuits in network cables,
and measures attenuation, reflection, delay difference (slope), etc. - Cable length test :
Maximum measured length 3000 meters (9842 ft).
Note: Only open circuit (open) cable tests are valid. - PoE detector : Supports
IEEE 802.3af/at/bt (Hi-PoE/PoE++) and non-standard PoE protocols.
Detects the power supply mode and the pairs of lines being energized. - FTP functions :
Allows copying test files and saved materials over the network via FTP . - 1000 Mbps RJ45 network port :
Includes network tests such as ping test, IP address conflict detection, PPPoE dial-up internet connection ,
route tracing (Traceroute) , and LLDP/CDP switch port findings . - Professional TDR cable break and short circuit testing :
Maximum measurement length 1200 meters (3937 ft) . - Smart digital multimeter : Features
automatic range (auto-ranging) voltage/resistance/continuity capability ,
and insulation protection. - Optical power meter (OPM) and visual fault detection device (VFL) :
Emits a red laser to detect fiber optic line breaks, cracks, formations, and other faults. Detects
power at wavelengths of 850/980/1270/1300/1310/1490/1550/1577/1625/1650nm.
TECHNICAL SPECIFICATIONS
| Model | ALPSAT – AS328 | |
| Screen and Display | 4-inch IPS touchscreen, 800*480 resolution | |
| Cable Tracing/Cable Mapping/Continuity Testing | Transmission Signal | Digital signal (definitely rejects noise and false signals) |
| Cable Types | It supports RJ45 twisted pair cable, RJ11 telephone cable, BNC video cable, and low-voltage metal cables. | |
| UTP Cable Testing | It tests any two or more wires in a network cable. The connection sequence, 1000/100M, and cable number are displayed on the screen. The receiver is identified via indicators. | |
| Continuity Test | Transmitter: Minimum recognition length 10 cm | |
| Receiver: Minimum recognition distance 1 meter | ||
| Short Circuit Detection | Network cable supports short circuit detection. | |
| Length Measurement | length of network cables , with a maximum measurement length of up to 3000 meters . Accuracy: Cable length x 3% ± 1m | |
| RJ45 Cable TDR Test | Test the condition, length, attenuation reflectivity, impedance, slope, and other parameters of the cable pairs . Maximum measurable length up to 180 meters . | |
| Port Flashing | It quickly finds ports connected to Ethernet switches and other devices. | |
| PoE Detector | It supports IEEE802.3BT/AT/AF and non-standard protocol detection. It displays power supply voltage, power supply pins, and pin polarity. | |
| Network Tool | IP discovery, IP address scanning, PING test, LLDP/CDP detection, port flashing, PPPOE dial-up connection, FTP server, etc. | |
| Optical Power Meter | Wavelength (nm): 850/980/1270/1300/1310/1490/1550/1577/1625/1650nm.
Power range (dBm): -70 to +6 dBm |
|
| Visual Fault Locator | It emits a visible red laser beam to detect breaks, cracks, bends, and other faults in fiber optic lines. | |
| TDR Coaxial Cable Test | Measurement of length and short circuits in BNC cable, network cable, telephone cable, RVV cable, and elevator cable, Cat 5/6 cable. Measurement range: 1.2 km. | |
| Level Meter | It measures the peak level, synchronization level, and spike level of video signals. | |
| Strength | ||
| Battery Power | Spreader | 3.7V 4000mAh lithium-ion rechargeable battery
(Working time approximately 6 hours) |
| Buyer | 3.7V 2000mAh lithium-ion rechargeable battery
(Working time approximately 12 hours) |
|
| Working Environment and Characteristics | ||
| Operating Temperature | -10 °C — +50 °C | |
| Operating Humidity Level | 30%-90% | |
| Dimensions | Spreader | 154mm x 86mm x 40mm / 0.3kg |
| Buyer | 218mm x 48mm x 32mm / 0.15kg | |
| Digital Multimeter Features | |
| DC Voltage | Measurement Range: 60mV/600mV/6V/60V/600V; Count: ±6000; Minimum Resolution: 0.01m
VA Accuracy: 0.01-600 VA Accuracy ±(0.6%+4)/600V-1000 VA Accuracy ±(0.8%+10) |
| AC Voltage | Measurement Range: 60mV/600mV/6V/60V/600V; Count: ±6000; Minimum Resolution: 0.01mV; Accuracy: 0.01-600 Vaccuracy±(1.2%+4)/600V-750 Vaccuracy±(1.2%+10) |
| Resistance | Range: 600Ω/6KΩ/60KΩ/600KΩ/6MΩ/60MΩ; Count: 0~6000; Minimum resolution: 0.1Ω; Accuracy: 0.1-6 MΩ accuracy ±(0.8%+10)/6M-60 MΩ accuracy ±(2.5%+4) |
| Capacitance | Range: 6nF/60nF/600nF/6uF/60uF/600uF/6mF/60mF; Count: 0~6000; Minimum resolution: 1pF; Accuracy: 1nF-6000u Accuracy ±(3.5%+20)/6000uF-60000u Accuracy ±(5%+4) |
| Frequency Test | Frequency Range: 6Hz/60Hz/600Hz/6KHz/60KHz/600KHz/6MHz; Counts: 0~6000; Minimum Resolution: 0.001Hz; Accuracy: 1-6MHz accuracy ±(0.1%+3) |
| Live Cable Detection (Live) | Supports |
| Diode | Measurement Range: 3V; Count: 0~3000; Minimum Resolution: 1mV; Accuracy: ±1.2%+20 |
| Continuity | Range: 50Ω; Counts: 0~500; Minimum resolution: 0.1Ω; Accuracy: ±1.2%+20 |
- Note: You can check out our other models.
| Function / Model (optional) | AS-322 | AS-324 | AS-326 | AS-328 |
| Network Cable Sequence, Length and Short Circuit Testing, Network Cable Quality Assessment, Cable Tracing, PoE++ Detection, Connection Speed, Port Flashing, IP Discovery, Duplicate Address Scanning, Ping, Route Tracing, LLDP/CDP, PPPOE | √ | √ | √ | √ |
| VFL (Visual Fiber Cable Detection) | × | √ | √ | √ |
| Opm (Fiber Optic Power Meter) | × | √ | √ | √ |
| DMM (Digital Multimeter) | × | × | √ | √ |
| TDR (Cable Length and Short Circuit Test) | × | × | × | √ |
| Video Signal Level Meter | × | × | × | √ |






