Intelligent Detection & Responsive Signal Interference System (SDR-Jammer)
Vodasafe PJ-SDR-S
I. Product Definition
This product is an integrated signal control terminal that combines full-band real-time spectrum detection with adaptive intelligent interference. The device features a built-in wideband software-defined radio transceiver and high-speed signal processing unit, enabling it to independently discover, identify, locate, and precisely block 2G/3G/4G/5G and Wi-Fi/Bluetooth signals without the need for an external computer.
The device operates on a "detection-guided interference" logic: normally, it performs panoramic scanning of the electromagnetic environment at very low power consumption. Once a target signal is detected, it immediately initiates synchronous interference on the same frequency point. When the signal disappears, the device returns to silent monitoring mode within milliseconds.
II. Hardware Integration Architecture
|
Parameter |
Specification |
|
Operating Frequency |
600 - 6000 MHz |
|
Max Real-time Detection Bandwidth |
400 MHz |
|
Detection Sensitivity |
≤ -100 dBm |
|
Modulation/Demodulation Capability |
2G (GSM/GPRS), 3G (WCDMA/CDMA2000), 4G (TDD/FDD-LTE), 5G NR (Sub-6G) |
|
Feature Analysis Capability |
Frequency point/channel number, signal strength (RSSI), bandwidth, uplink/downlink timeslot ratio (TDD only) |
|
Scan & Trigger Speed |
Band detection cycle < 1s; Signal trigger interference response < 100ms |
III. Detection Performance Specifications
|
Mode |
Operational Logic |
|
Following Silent Sniper |
No interference signal is transmitted when no signal is present. Upon detecting a sudden mobile phone uplink signal, instantly transmits a high-precision interference waveform on the corresponding downlink frequency point. Once the uplink signal disappears, the interference signal is turned off within milliseconds. |
|
Zone Resident Micro-Power |
After detecting a specific operator's frequency band, transmits only mW-level correlation interference on its signaling channel, keeping mobile phones in the coverage area continuously displaying "No Service" without causing significant radiated pollution. |
|
Full-Band Forced Blocking |
Manually or emergently triggered, continuously transmits swept/modulated signals across the entire 600MHz-6GHz band, physically blocking all communications via brute force. |
IV. Interference Performance Specifications
4.1 Intelligent Interference Modes
4.2 Band & Power Indicators
|
No. |
Frequency Range |
Typical Standard |
Transmit Power |
Note |
|
1 |
794-862 MHz |
N20, FDD-LTE |
30 dBm |
|
|
2 |
880-960 MHz |
N8, FDD-LTE |
30 dBm |
|
|
3 |
1710-1880 MHz |
N3, FDD-LTE |
30 dBm |
|
|
4 |
1920-2170 MHz |
N1, FDD-LTE |
30 dBm |
|
|
5 |
2300-2400 MHz |
N40, TDD-LTE |
30 dBm |
|
|
6 |
3400-3800 MHz |
N78, TDD-LTE |
30 dBm |
|
1.Total Output Power: Bands can operate concurrently. Rated total device power ≤ 60W.
2.Effective Radius: Typically 5m – 40m in open space (depends on target base station signal strength; decreases with wall attenuation indoors).
4.3 Interference Waveform Technology
1.Precise Protocol Targeting: Can lock onto LTE/5G NR synchronization and broadcast channels (PSS/SSS/PBCH), requiring only milliwatt-level power to disconnect terminals from the network.
2.Timeslot Synchronized Interference: For 5G TDD networks, automatically learns the base station frame structure and injects interference only during downlink timeslots, maximizing efficiency.
V. Detection & Interference Coordination Mechanism (Core Feature)
The key advantage of this integrated design lies in its microsecond-level detection-interference coordination:
1.Full-Duplex Isolation: Uses an internal high-isolation circulator and RF switch matrix. When interference is active, the detection chain automatically enters a protected attenuation state; the instant interference stops, the detection chain immediately resumes monitoring.
2.Closed-Loop Self-Control: After interference starts, the detection system continuously monitors the signal strength of the affected band. Once communication signal suppression is confirmed (power below threshold), the power amplifier automatically reduces power to maintenance levels to avoid unnecessary radiation.
3.Self-Interference Learning: The device is pre-programmed with its own interference characteristics. During transmission, the software algorithm automatically filters out leakage from its own power amplifier, preserving the ability to sense weak external environmental signals.
VI. Physical & Electrical Specifications
|
Parameter |
Specification |
|
|
Dimensions (L x W x H) |
400 x 200 x 155 mm |
|
|
Weight |
7 kg |
|
|
Power Supply |
AC 220V ± 10% (50 Hz) |
|
|
Power Consumption |
Detection only: < 50W / Sniper mode: < 80W / Full-band blocking: < 120W |
|
|
RF Interface |
Integrated internal antenna |
|
|
Mounting Method |
Pole mount / Wall mount bracket |
|
|
Operating Temperature |
-40°C to +60°C |
|
|
MTBF |
≥ 50,000 hours |
|
VII. Standalone Management & Networking Functions
7.1 Local Control
1.Use infrared remote control to switch operating modes: Silent / Automatic / Manual Jamming mode
2.Direct connection via Ethernet: Access the device's built-in web page via a browser to configure modes (Silent/Automatic/Manual) and other detailed functions.
7.2 Networking & Coordination
1.Multiple devices can be deployed on different floors of a large building, uniformly connected to a server for platform management and control.
2.Devices from different regions nationwide can be connected to the same management platform. Requires configuration of a static IP address for convenient access from devices in different areas to the management platform.
