The ST-301 Spider is a surveillance detection device designed to scan and analyze wirelines to protect your data and communications from unauthorized eavesdropping.

Made to detect and locate hidden surveillance devices galvanically connected to power and low-current wirelines, the ST-301 Spider ensures that your confidential conversations and data remain secure. This wireline analyzer works in passive and active modes, meaning it can detect both active eavesdropping devices transmitting signal and those in standby mode.

The ST-301 Spider Wireline Analyzer is especially useful for security professionals who need to quickly and accurately assess vulnerabilities in environments such as government facilities, corporate offices, military organizations, and any location where secure communications are critical. Private investigators can also use the ST-301 Spider to verify that their clients' environments are free from listening devices or covert surveillance equipment.

The ST-301 Spider has 4 modes of operation: Low-Frequency Amplifier, Wired Receiver, Wired Non-Linear Junction Detector, and Reflectometer.

1. Low-Frequency Amplifier detects and strengthens weak signals at lower frequencies, making them easier to detect and analyze.
2. Wired Receiver listens for and intercepts signals directly from wired lines like power or low-current communication cables.
3. If there are any electronic components on wired lines, such as semiconductors often found in surveillance devices, the Non-Linear Junction Detector (NLJD) detects them. This allows you to locate hidden devices, such as microphones or bugs, even if they are turned off.
4. Reflectometer sends a signal down the wire line and measures how the signal reflects back. Any interruptions or changes in the signal can mean a break, tampering, or unauthorized connection to the wire. This makes it highly effective for detecting wiretaps or modifications that could compromise security.

The ST-301 Spider offers several functional detection features. It can detect hidden microphones (both dynamic and electret) in wiring, unauthorized galvanic connections to wires, and spying devices that send signals through power and low-current lines within the 100 kHz to 180 MHz frequency range.

With its automated testing capabilities, the analyzer can quickly assess and analyze multi-wire cables by automatically switching between pairs, helping you identify any unusual activity.
The device comes packaged in a hard carrying case and includes various adapters and connectors, making it adaptable to different environments.

ST-301 Spider Wireline Analyzer Main Features:

• Detects spying devices on power and communication lines
• Active and passive modes for detecting eavesdropping devices in both active and standby mode
• 4 operation modes: low-frequency amplifier, wired receiver, wired non-linear junction detector, and reflectometer
• Signal detection in frequency range from 100 kHz and 180 MHz
• Electronic switch integration allows for quick testing of all wire pairs within multi-wire cables
• Identifies dynamic and electret microphones installed in wires
• Adapters, switches, and cables included in case for checking common wire types

ST-301 Spider Telephone Wire Analyzer Full Specifications: 

Frequency range: 20 - 25000 Hz
Input resistance: 200 kOhm
Adjustment range of gain: 0 - 60 dB
The maximum signal amplitude on an input: 10 V
Spectral density of noise voltage: 6 nV/Hz6
Bias voltage values: 0, ±5, ±10, ±15, ±20, ±26 V
Form of representation of a signal: Oscillogram, Spectrogram
Measurement range on a direct current: ±80 V

WIRE RECEIVER (WR)
Frequency range: 0.1 - 180 MHz
Time of scanning of all range: 0.3 - 1 sec
Minimum level of detected signal in AUTOMATED mode: -60 dBm
Dynamic range: 50 dB
Input resistance: 50 Ohm
Demodulation: AM, FM
Bandwidth of the filter: 180 kHz
The maximum allowed voltage in the cable: 250 (AC),80 (DC) V
Data representation form: Spectrogram, Oscillogram, Table

NON-LINEAR JUNCTION DETECTOR (NLJD)
Level (amplitude) of the probing signal: ±14 V
Frequency of the probing signal: 60 Hz
Separate indication of even and odd harmonics: yes
Minimum detectable level of non-linear distortion: 0.1 %

REFLECTOMETER (REF)
Range of distances: 3 - 150 m
Error of measurements: ±0,6 m
The ability to work on cables under voltage: no

Power supply
The built-in lithium-polymer accumulator: 3.7 V
Power consumption: <1 W
Operating time at the maximum power consumption: >3 hour
Charging interval of completely discharged accumulator: 5 hour

Weight and dimensions
Dimensions of the main unit (length, width, height): 165 x 98 x 40 mm
Mass of the main unit: 0.47 kg
Packaging dimensions (length, width, height): 390 x 310 x 170 mm
Mass of the kit in packaging: 4.4 kg

ST-301 Spider Wirelines Analyzer Feature Focus:

Active and Passive Surveillance Detection 

The ST-301 Spider operates in both active and passive modes, allowing it to detect hidden surveillance devices regardless of their operational state. Active mode detects devices transmitting signals, while the passive mode identifies those in standby. This dual functionality ensures full detection, whether the spying device is currently ON or OFF.

Low Frequency Amplifier Mode

The built-in low-frequency amplifier boosts weak signals at lower frequencies, making it easier to detect spying devices whose signals are deliberately kept low to avoid detection, such as covert microphones or hidden transmitters. By amplifying these signals, the ST-301 Spider ensures that no surveillance devices go undetected.

Wired Receiver for Signal Interception 

The wired receiver mode allows the ST-301 Spider to listen for and intercept signals running through power and communication lines. This feature is useful in environments where someone may be using the wiring infrastructure to transmit data or audio to remote locations. By directly tapping into these lines, the ST-301 Spider can detect unauthorized transmissions and reveal potential risks to data and communication security.

Non-Linear Junction Detector (NLJD) 

Reflectometer for Wireline Integrity 

Using the reflectometer mode, the ST-301 Spider sends a signal through the wireline and analyzes how it bounces back. Any disruptions or irregularities in the signal can indicate wiretaps, tampering, or unauthorized changes. This feature is especially useful for IT professionals securing corporate networks from wire-based espionage.

Detection of Dynamic and Electret Microphones

Hidden microphones are some of the most common surveillance devices used to compromise sensitive conversations, and the ST-301 Spider is capable of identifying both dynamic and electret microphones embedded in wirelines. Electret microphones are often used in covert eavesdropping setups due to their small size and power efficiency. The ST-301 can even activate these microphones by applying an in-line BIAS voltage, bringing them out of standby mode for detection.

Wide Frequency Range Detection from 100 kHz to 180 MHz

The ST-301 Spider is designed to detect signals across a wide frequency range, from 100 kHz to 180 MHz, making it highly effective at identifying various eavesdropping devices. Whether the device is transmitting through power lines, communication cables, or hidden on a low-current wire, this wide coverage ensures that all potential threats are within the analyzer’s detection capabilities.

Automated Multi-Wire Cable Testing

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ST-301 Spider Wireline Analyzer FAQs:

What is the ST-301 Spider Wireline Analyzer used for?
The ST-301 Spider is a surveillance detection device designed to scan and analyze wirelines to detect hidden surveillance devices, ensuring the protection of your data and communications from unauthorized eavesdropping.

How does the ST-301 Spider detect eavesdropping devices?
The ST-301 Spider operates in both active and passive modes. It can detect active devices that are transmitting signals as well as those in standby mode. It utilizes four key features: Low-Frequency Amplifier, Wired Receiver, Non-Linear Junction Detector (NLJD), and Reflectometer.
 
Can the ST-301 Spider detect hidden microphones in wirelines?
Yes, the ST-301 Spider can detect hidden dynamic and electret microphones embedded in wirelines. It even has the capability to activate these microphones by applying an in-line BIAS voltage to bring them out of standby mode for detection.
 
What is the frequency range of the ST-301 Spider?
The ST-301 Spider is capable of detecting signals across a wide frequency range, from 100 kHz to 180 MHz, allowing it to identify various eavesdropping devices transmitting over power lines, communication cables, or low-current wires.
 
How does the ST-301 Spider’s Reflectometer feature help detect wire tampering?
The Reflectometer sends a signal down the wireline and measures how it bounces back. Any irregularities, interruptions, or changes in the signal can indicate wiretaps, tampering, or unauthorized modifications to the wireline.
 
Can the ST-301 Spider detect surveillance devices that are turned off?
Yes, the ST-301 Spider’s Non-Linear Junction Detector (NLJD) detects semiconductors in electronic devices, such as surveillance bugs, even if they are powered off or in standby mode. This ensures that no hidden devices go undetected.
 
What environments is the ST-301 Spider suitable for?
The ST-301 Spider is ideal for use in high-security environments such as government facilities, corporate offices, military organizations, and any location where secure communications are critical. It’s also a valuable tool for private investigators.
 
How does the Low-Frequency Amplifier on the ST-301 Spider work?
The Low-Frequency Amplifier mode enhances weak signals at lower frequencies, making it easier to detect covert surveillance devices, such as hidden microphones or transmitters, that use low-frequency signals to avoid detection.
 
Does the ST-301 Spider automatically test multi-wire cables?
Yes, the ST-301 Spider features automated testing for multi-wire cables, which saves time by automatically switching between wire pairs. This makes it especially useful for large-scale wiring environments, such as corporate offices.
 
What comes with the ST-301 Spider Wireline Analyzer?
The ST-301 Spider comes with a complete set of accessories, including the main unit, charger, flash card, patch cords, adapters, headphones, and a sturdy carrying case to accommodate various wireline types and environments.

ST-301 Spider Delivery set:

1. Main unit
2. Charger of the main unit
3. Flash card 
4. Mini-USB patch cord
5. Television splitter
6. Headphones
7. Adapter for testing of the power mains
8. TV(m)/F(m) adapter
9. TV(f)/F(m) adapter
10. TV(f)/TV(f) adapter
11. RJ11 (1/2) splitter 
12. RJ45 (1/2) splitter 
13. RJ11 socket 
14. RJ45 socket
15. RJ45 short-circuit socket
16. Adapter and screwdriver for connecting to the multi-wire cable
17. Cable storage bag
18. Television cable TV(f)/TV(m) 
19. Patch cord RJ45/TV(m) for connecting to the TV socket TV(f)
20. Patch cord for connecting to the RJ45 PC socket
21. Patch cord for connecting to the RJ11 telephone socket
22. Patch cord with a needle for connection to the cable shield
23. Case

Note:  

For detailed info on the specifications and use of the device, please read the PDFs available for download below. 
 
24 Months Warranty

>>Download detailed specifications (PDF)<<