GP-Probe TGE2

Three-channel probe for GNSS signal quality measurements and spoofing\jamming detection

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GNSS Radio Probe for Time & Frequency Reference System Protection
Key Features

Key Features

  • Three RF channels to detect intentional, synchronous GNSS spoofing.
  • GNSS signal quality measurements: pseudorange errors, carrier phase, SNR, etc.
  • Support: GPS/QZSS L1 C/A, GLONASS L10F, BeiDou B1I, Galileo E1B/C, SBAS L1 C/A: WAAS, EGNOS, MSAS, GAGAN.
  • The embedded real-time operating system guarantees high availability, reliability, and cybersecurity. The GP-Probe boots 3 seconds after power up!
  • PPS input for the external time server health checking. The GP-Probe measures the time offset between internal and external PPS. PPS input supports low-current signals.
  • Optional GP-Blocker with an embedded noise generator suppresses the most powerful counterfeit RF signals.
  • Secure firmware auto-update engine. Update the firmware of all connected GP-Probes in 40 seconds!
  • Embedded self-diagnostic and dispatching all error messages to the cloud.
  • PPS output for synchronization of external equipment.
  • Optional RF power divider – GP-Divider enables to utilize one GNSS antenna for two receivers. The GP-Divider supports the GNSS antenna preamplifier current simulation.
  • Form factor: 19-inch rack, half-size.
  • Double power module: 110 – 220 AC, 18 – 75 DC.
  • Active/passive GNSS antenna support.
  • 4G modem and 100BASE-TX Ethernet for data transferring to the GP-Cloud.
  • Web interface for configuration (HTTP or HTTPS).
  • External devices can be controlled via remote interfaces: RS232/Telnet/SNMP with embedded Lua scripting language.  GP-Probe can send commands to the connected time server for switching to holdover, etc. This facilitates integration with existing client infrastructure.



Supported GNSS



BeiDou B1


Galileo E1B/C

RF Channels

Three GNSS RF channels for assured detection of intentional sophisticated synchronous spoofing attacks

Minimal Horizontal GNSS Antenna Separation

1 m

Detected Threat Types

All types of jamming

1 ch. – asynchronous spoofing

2 ch. – synchronous spoofing

3 ch. – synchronous multiple-TX spoofing

GP-Probe Configuration

Browser-based configuration and monitoring, GP-Cloud


GP-Probe status

Server connection settings and status

GNSS channels status: satellites in view, RMS CN0


GNSS Antenna Power



Housing:Aluminum, IP20
Size:1 U half-size, rack mount, 211.0 x 203.0 x 44.0 mm
Weight:2.0 kg


Operational Temperature:0°C to +50°C
Storage Temperature:-20°C ~ +85°C
Humidity:0% – 95% RH non-condensing @ 40°C
Vibration and Shock:15g/0.53oz, 11ms half-sine wave
Vibration:10 – 55 Hz/0.07g, 55 – 500 Hz/1.0g

GNSS Antenna Inputs

Impedance:50 Ω
Antenna bias voltage:3.3 VDC
ESD protection:15 KV

PPS Input

Impedance:50 Ω, TTL compliant
High-Voltage Level
(50 Ω):
1.3 Min
5.5 Max

PPS Output

Impedance:TTL into 50Ω
Typical Accuracy
(clear sky):
  ±20 ns RMS to UTC (USNO), typical

I/O Connections

Network Interface:10/100BASE-T RJ45, 15KV ESD protection
RS232 interface:HOST port for remote control of external equipment.
15KV ESD protection. Optical isolation 2.5KV.

Power Supply

AC:100 – 240 VAC, 50/60 Hz
IEC 60320 C14 connector
DC:18 – 75 VDC
Power Consumption:< 10 W

Supported Protocols

GP-Cloud interaction:HTTPS
Firmware Upgrade Server:SFTP
Ethernet Protocol:IPv4, DHCP (RFC 2131)

3G/4G Modem

Data transfer:
  • LTE CAT4
    Uplink up to 50Mbps
    Downlink up to 150Mbps
  • HSPA+
    Uplink up to 5.76Mbps
    Downlink up to 42 Mbps
  • UMTS
    Uplink/Downlink up to 384Kbps
  • EDGE
    Uplink/Downlink up to 236.8Kbps
  • GPRS
    Uplink/Downlink up to 85.6Kbps
Available bands:
  • EH – for EMEA/Korea/Thailand regions
    LTE-TDD B38/B40/B41
    UMTS/HSPA+ B1/B5/B8
  • AH – for North America
    UMTS/HSPA+ B2/B5
  • SA – for Australia/New Zealand/South America
    LTE-FDDB1 / B2/B3/B4/B5/B7/B8/B28
    UMTS/HSPA+ B1/B2/B5/B8
    GSM/GPRS / EDGE850 / 900/1800/1900MHz
  • JC – for Japan
  • WO – without built-in modem
(U)SIM:Mini-SIM (2FF) ISO/IEC 7810:2003, ID-000
Standard 3V/1.8V user card interface, 15KV ESD protection
Antenna connectors:Main, Aux. SMA (f)


Input Connector:SMA(F)
Output Connector:SMA(M)
Impedance:50 Ω
RF insertion loss (when the channel is on):2.5 dB typical
RF isolation (when the channel is off):110 dB min
Nois Generator BandsL1, G1
Nois Generator Power– 30 dBm RMS
ESD protection:15 KV

Regulatory Compliance

EMC:EN 61000-3-2: 2014
EN 61000-3-3: 2013
EN 55022
EN 55024
ETSI EN 301 489-1
RF:EN 301 511
EN 301 908
ETSI EN 301 489-52
ETSI EN 301 489-19
Safety:EN 60950-1: 2006+A2: 2013
RoHS:EN 50581:2012

Warranty & Support

Warranty:1 year
Extended warranty is available
Support:1 year of complimentary technical support

Package Content

GP-Probe:1 pc. Rack mount hardware included (assembly required)
GNSS antenna:3 pcs. BeiDou, Galileo, GLONASS, GPS magnet-mount antennas
3G/4G antenna:2 pcs. Multiband antennas: 700 MHz, 800 MHz, 850 MHz, 900 MHz, 1.8 GHz, 1.9 GHz, 2.1 GHz, 2.3 GHz, 2.5 GHz, 2.6 GHz
Manuals:Quick start guide
Power Lead:1 pc. 1.7 m IEC power lead
Ethernet cable:1 pc. 3 m length
Ordering Information

Ordering Information

GP-Probe model number definition

GP-Probe Ordering Information

Number of channes

CH1 – asynchronous spoofing detection
CH2 – synchronous spoofing detection
CH3 – detection of synchronous multiple-TX
spoofing. Uncompromising protection
against all types of attacks

3G/4G modem bands

EH – for EMEA/Korea/Thailand regions
AH – for North America
SA – for Australia/New Zealand/South America
JC – for Japan
WO – without a built-in modem

Onboard signal processing

The GP-Probe can operates without
connecting to the GP-Cloud servers.
Supports jamming and spoofing detection
as well as signal quality analysis

Optional Accessories


An optional GNSS threat blocker. High isolation RF switch and an embedded noise generator can suppress the most powerful counterfeit RF signals. The ideal solution for protecting time servers against spoofing.


GNSS power divider with GNSS antenna preamplifier current simulation. It allows you to use one GNSS antenna for two receivers at once.


Dome antenna.
BeiDou, Galileo, GLONASS, GPS.
Panel Mount, IP67


10 m RG58 Cable


50 m LMR195 Equivalent Cable


50 m LMR195 Equivalent Cable


A multi-strike maintenance-free surge suppressor


GNSS Amplifier – 20db

Kindly send us your enquiry via the form below and we will contact you shortly

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