New threats demand superior information, acquired and analysed from all potential sources. The increasing number of emissions and the rising density of cryptic signals produced by new or modified modems demands an highly automated approach and the use of sophisticated demodulation and decoding systems.

go2MONITOR is a modular all-in-one software solution for receiver control, classification, demodulation, decoding and recording of HF, VHF and UHF signals.

go2MONITOR has an easy to use, automated interface for monitoring tasks. One single tool provides all the necessary processing steps - classification, demodulation, recording and decoding - in a fully integrated environment.

go2MONITOR supports the operator to monitor up to eight signals in parallel. Its automatic buffering of the complete wideband signal input allows easy switching to new signals without loss of information.

Known signals can be monitored easily thanks to the included station list and extensive decoder library. The available production channel will automatically process classification, recognition and decoding.

The Solution for...

COMINT, SIGINT, Signal Corps, Homeland Security

go2MONITOR is a standalone application and is perfect suited for all bodies in the defense and security organizations.

EW

Operations are executed in an increasingly complicated electromagnetic spectrum environment. The need for forces to have unimpeded access to and use of the electromagnetic environment demands on continuous information about the actual situation.

Mission Planning

Advance commandos, need a small and automatic system to pickup the required data necessary to do a successful mission planning at home.

Spectrum Monitoring

We provide Telecom Regulators (ITU) with the information on how the radio spectrum is utilized and if necessary the data to identify intrudes by monitoring part of the traffic.

System integrators

A remote control interface is available and provides all the function required to integrate go2MONITOR in to your application. Your product will be earlier on the market and you don’t bear the risk and costs of the development of an own decoding software.
Ask us if you need further details regarding the ICD (low level interface documentation) or the C++/Java API's.

Use Cases

Determination of frequency allocation

go2MONITOR gives you an overall survey of a defined part of the radio spectrum. The system runs in automatic mode, searches for all signals in a predefined frequency range and stores the results from the classification (frequency, modulation, symbol rate etc.). Rules can be defined to control the behavior of the system.

go2MONITOR gives you an overall survey of a defined part of the radio spectrum. The system runs in automatic mode, searches for all signals in a predefined frequency range and stores the results from the classification (frequency, modulation, symbol rate etc.). Rules can be defined to control the behavior of the system.

Automatic search and decoding of known signal types

go2MONITOR searches in predefined frequency ranges for decodable signals. Found signals are classified, technical parameters of the signals are evaluated, decoded and all the output (text, audio, binary data, metadata) is stored in the database. Rules can be defined to control the behavior of the system.

Automatic search and recording of unknown signal types

go2MONITOR searches in a predefined frequency range for undecodable signals. Found signals are recorded digitally for more in depth analysis. Rules (e.g. burst duration, bandwidth) can be defined to control the behavior of the system.

Automatic frequency monitoring

Simply connect an SDR and start decoding the most advanced protocols
go2MONITOR monitors a list of predefined frequencies. If a transmission starts and if decoding is possible, then the output of the decoder is stored. If no decoding is possible then the signal is recorded. Rules can be defined to control the behavior of the system.

Manual online monitoring of frequencies

go2MONITOR is controlled by the operator. The operator tunes the receivers, selects a signal, uses the classifier or manually starts a decoder. Output is stored. Visual tools like FFT, spectrogram, waterfall, zoom and cursors can be used from the operator. Live-audio is also available for feedback.

Recording frequency ranges

go2MONITOR records the IF in a selected range. Manual mode is possible but also rules can be defined to control the behavior of the system.

User specific actions, control, interface

The implemented Python scripting engine provides all the function if you have to do some specialized automoatization that is not supported "out-of the-box".

Multi-channel wideband signal monitoring

go2MONITOR simplifies radio monitoring in a unique way. Just select signals of interest in the wideband input display; they are cut out by Digital Down Conversion (DDC) for further operations in the production channels. There, the detailed narrowband analysis of the signals is performed. Up to eight signals are simultaneously analysed and decoded. Detected activities are classified, the protocols are evaluated, decoding is started and the output is stored. The operator acts only as a supervisor.

• Signal selection. Mark signals of interest in the wideband displays spectrogram or drag and drop results from the snapshot classifier to define production channels input.
• Production channel. The selected signal is assigned to a production channel (using internal DDCs) for in-depth signal processing.

Production Channels

The result display shows the collected results in detail and can be configured using the Extensible Style sheet Language (XSLT). Up to eight production channels can be used in parallel in manual mode, several hundreds in automatic mode.

• Classification. A continuous classification takes place on the selected signal and the modulation parameters are evaluated, displayed and stored in the database.
• Decoding mode. The production channel is set fix to a decoder/modem without automatic protocol detection. Output and modulation parameters are evaluated, displayed and stored in the database.
• Recognition and decoding mode. An assigned signal will be decoded automatically. The signal is checked against a list of decoders and the best match selected for decoding. These operations are buffered to avoid any data loss.
• Classification, recognition and decoding mode. The signal is classified and the list of decoders is automatically reduced according to the modulation type and all other parameters like symbol rate, shift, and number of tones etc.

Operating Modes

The selection of signals for analysis, recording, classification and decoding can be automatic or manual.

• Automatic mode: Based on set of rules defined by the operator, the product will automatically search for signals, demodulate, decode and store the results. This leaves the operator free to concentrate on the unknown signal types that emerge.
• Manual: The operator selects manually a signal in the go2MONITOR GUI and then manually or automatically let the system select the correct decoder to decode the signal.

Modulation and modem type Classifier

The go2MONITOR software contains a high performance wideband classifier with unique functionality:

• Detection of all signals in the wideband input frequency range
• Wide- and narrowband modulation type classification
• Wide- and narrowband modem/protocol classification for specific modem types
• Automatic signal tracking (start/end, modulation type change, …)
• Detailed signal parameters measurement

Automatic Recognition and Decoding

The production channels use configurable lists of decoders/modems for automatic protocol detection. The best match is selected for decoding. The signal is demodulated, decoded and the results are displayed in the result view. The decoder modem lists can be configured, loaded and saved. The decoders/modems lists can be tailored according to the monitoring task.

Signals of interest can easily be added to an integrated station list. Entries in the station list can be assigned to production channels by using drag & drop or the context menu.

• Reliable recognition, demodulation and decoding of signals
• Detection and recording of speech signals
• More than 200 protocols available, permanently extended
• Processing of signals without loss (getting the first bit)
• Extraction of information about the transmission protocol, meta data, time-stamp etc.
• Signal decoding down to the content like text, audio, binaries etc.
• Storing the output in a database and files
• Extendible by the customer (Universal Demodulator, Decoder Description Language)
• Protocol aided soft-decision demodulators and decoders

As an outstanding feature the go2MONITOR/go2DECODE software enables the user to extend the existing decoder library by using go2DECODE. Using its integrated decoder development features, its easy to develop new or modify existing decoders and use them together with the integrated universal demodulators.

Wide- and narrowband Recording

go2MONITOR provides functions to record wide- and narrowband IF signals without loss of quality. Start and stop of recording can be controlled from the channel processing part of the GUI or automatically controlled by signal parameters (modulation parameters, energy, etc.).

• Loss-less IF wide- and narrowband signal recording
• Additional wideband spectrum recording for fast signal review
• Automatic scheduled recording
• Automatic recording triggered by signal parameters (modulation parameters, etc.)
• Replay of recordings for later analysis and decoding

Easy to use Wideband GUI

All modules, functions and features are controlled from the go2MONITOR GUI. The GUI is modular and flexible and allows easy adaptation to specific requirements and contains the following parts:

• Live signal monitoring
• Extraction of narrowband channel
• Signal modulation and modem classification
• Interactive demodulation and decoding
• Live audio
• Wideband and narrowband recording control
• Task scheduler and monitoring (of all executed jobs)
• Replay of IF recordings
• Result storage and postprocessing

Multi Wideband Signal Inputs

go2MONITOR is ready to run multiple wideband inputs side-by side in one application. The wideband inputs can be connected to the same receiver (for example multiple streams from one PLATH SIR 511X receiver) or to different receivers from different manufacturers parametrized on different frequencies.

Tabs are used to show multiple receivers wideband input (to safe screen space). Additional  receivers input can be displayed side by side.

For signal decoding, the production channels can be set independently to any receiver input, giving full flexibility.

Typical scenarios:

• Work with multiple receivers connected to different antennas (different locations, directions, polarisation, etc.) and select the best one for decoding.
• Monitor HF and VHF/UHF at the same time using different receivers.
• Monitor multiple frequency ranges at the same time and use the available decoding channels according to your requirements.
• Simultaneous decoding/recording from one receiver and additional playback of recorded files. So even during live monitoring you can work with recorded files in parallel.

ResultViewer

During live monitoring or in automatic mode all results are stored in a data base for later result analysis and export. With the ResultViewer you can have a filtered view even over the results of some weeks. Many postprocessing features like result editing, signal replaying, data and file export, IF audio listening etc. are outstanding software features.

• Browser or graphical result display
• Showing all detected emissions, classifier results, decoder output etc.
• Results filtering for time, frequency, modulation parameters, protocol, text etc.
• Audio player
• Results export
• Different formatting options for text or binaries
• System and signal location map (interface to DF system necessary)

Remote Control, Interface

go2MONITOR offers various functions to exchange data with other applications or systems and offers full remote control capabilities. Running without user interface the software can be used as backend signal monitoring core integrated in other systems.

• Remote Control of the software via TCP/IP
• Directly access of all result files stored in the file system or SQL based database
• Operating without GUI for backend integration

go2MONITOR Technical Specifications

Parameter	Specification
Data acquisition	Digital IF (complex I/Q), bandwidth up to 20 MHz coherent (1 MHz in basic version) Digital AF recordings (complex WAV 8, 16, 32 Bit) 2 wideband inputs in parallel. Other configurations on request
Localization	English or German Others on request
Documentation	PDF Online-Help
Recommended PC hardware	Min. Intel i5 4 Core, 2 GHz, 8 GB RAM for 4 channels version Min. Intel i7 8 Core, 2 GHz, 16 GB RAM for 8 channels version HDD: min. 500 GB recommended (depends on recordings) Screen Resolution: min. 1920 x 1080 pixel or two displays 1280 x 1024 pixels (multiple monitors recommended) Fast Ethernet for digital IF input
OS	Windows 7 SP1 (with Microsoft Windows patch KB2999226) / 10 de/en, 64 bit Linux (CentOS 7.5) 64 bit
ISO 9001:2015	Company is certified (not only hardware)
License	USB-Dongle (CodeMeter) License sharing witch license server The AMBE+2™ voice coding Technology embodied in this product is protected by intellectual property rights inclu-ding patent rights, copyrights and trade secrets of Digital Voice Systems, Inc.  This voice coding Technology is licen-sed solely for use within this Licensed Product.  The user of this Technology is explicitly prohibited from attempting to extract, remove, decompile, reverse engineer, or disassemble the object code, or in any other way convert the Object Code into a human-readable form. US Patent Nos.  #8,595,002, #8,359,197, #8,315,860, #8,200,497, #7,970,606, #6,912,495 B2, #6,199,037.

 

Features

Software Feature	Remarks
Alphabets	Can be added to the decoder, freely configurable Requires go2DECODE
Classifier	1 MHz bandwidth, (2.4 HF/ 20 MHz V/U/SHF with option WCL) Manually triggered or repetitive snapshots (at 10, 20,… . sec intervals) or continuous (with option AMT)
Channels/ Decoders	1, 2, 4 or 8 channels or more in steps of 32 (with options WMPC) Automatic change of decoder if signals change in "Recognition + Decoding" mode Customizable decoder lists for automatic decoding Buffering for lossless decoding No loss of data during analyzing and protocol changes Proprietary Decoder Description Language (DDL) Custom extendable decoder list (with go2DECODE)
Demodulators	Universal demodulators with AGC and AFC Automatic baud rate synchronization (less problems with playback of files recorded on other inaccurate devices) For types and parameter details please refer to the go2DECODE datasheet
GUI	Simple and intuitive to operate user interface Supports multiple monitors Drag-and-drop of frequencies, classifier results, stations Receiver control Wideband input spectrogram and spectrum Manual channel control Resultviewer Simultaneous working with multiple receivers and with multiple narrowband channels
Input Files	Digital IF (complex baseband I/Q 32bit), Bandwidth <= 1 MHz (standard) or up to 20 MHz (with option WCL) Playback of standard wav files Digital AF (WAV 8, 16, 32 Bit)
Input TCP/IP Streaming	Generic PROCITEC/PLATH VITA 49 PXGF
Option: AMT Automatic Monitoring and Tasking	Full automatic job based monitoring (decoding, recording, classification) Continuous classification Missions and Tasks based on time, frequencies (ranges), RX location, modulation, modulation parameters, modems, … Powerful filtering functions Easy overview over decoded, classified or recorded signals ResultViewer with continuous updates
Option: NRC Narrowband Receiver Control	Frequency independent production on all 1/2/4 or 8 production channels Monitor signals in different frequency ranges Narrowband receivers offer a better sensitivity compared to wideband receivers Narrowband receivers consume less resources, as no DDC is required Possibility to add "virtual" receivers using ExtIO, which can connect to third party DDCs or streams
Option: WCL Wideband Input, Classification 5/10 or 20 MHz	Continuous classifier emission tracking (only if AMT option available) Wideband spectrogram display (HF/V/U/SHF): 1 / 5 MHz or 1 / 10 MHz or 2.4 / 20 MHz Wideband classification (HF/V/U/SHF): 1 / 5 MHz or 1 / 10 MHz or 2.4 / 20 MHz Delivered as a complete package with server and receiver
Option: WMPC 16/32 Wideband Multi Production Channels	Extends the number of channels up to 16 / 32 or in steps of 32 Each channel supports DDC, demodulation, decoding, narrowband classifier and narrowband recording functionality Easy overview over decoded, classified or recorded signals
Option: WBR Wideband Recording 20 MHz	Lossless recording of up to 20MHz digital IF IQ data in standard WAV files Parallel storage of spectrum data for fast preview Recording replay and signal extraction Recording scheduler (with option ATM) Delivered as a complete package with server and receiver
Option*: Hopper Detection	Recognition and recording of hopper signals in 20 MHz (option WCL-20 and WBR-20 are required) input bandwidth V/UHF (2.4 MHz HF) frequency range.
Option*: NCL Narrowband Classifier	Additional automatic narrowband classifiers with command line control and result interface. Each narrowband classifier (number set with license) classifies a signal in a recording parallel; the processing is performed „faster than real-time“. Useful for backend integration
Output	Visual decoder result output, configurable using XSLT All results are continuously saved in files and SQL database Protocol detection and production down to the content (text, audio, binaries) Various export functions
Recording	Wideband (1 MHz, 20 MHz with option WCL and WBR) Narrowband up to 300 kHz for each DDC IQ channel Bitstream (demodulated bits)
ResultViewer	Display, filter and export result data Display of: Decoder output, demodulated audio files (CW, TETRA etc.), text output (ALE, HFDL, etc.), binary files Audio demodulation and playback Recognized modems (protocols) Wide-/Narrowband classification results Recorded wide-/narrowband IF-signals, Advanced filter, Result detail and Time/frequency filter are implemented as docking/floating windows and can be freely positioned Table and graphical (time-frequency plane) result display Filter data using GUI, SQL or scripting
Third party decoder	Interface to the DDC channel output Interface to the audio output
Training	Very short training period Same technology as in large decoding systems

* The products are configurable. The software delivered will be configured as stated in the order confirmation.

 

Supported receivers*

Receiver	Max. Rx bandwidth**	Spectrum overview	Scan	Remark
AirSpy	8 MHz			Experimental support
CommsAudit CA7851	5 MHz			VITA 49
CommsAudit CA7852	40 MHz			VITA 49. External receiver control only
Grintek GRX Lan	1 MHz
IZT R3xxx series	20 MHz	X	X	Up to 3 channels  spectrum
IZT R4000 (SignalSuite)	1 MHz			1 channel only
Microtelecom PERSEUS	800 kHz			Limited USB 3.0 compatibility
narda® NRA-3000 RX	320 kHz
narda® NRA-6000 RX	320 kHz
narda® IDA 2	320 kHz
narda® SignalShark®3310	20 MHz			VITA 49
PLATH SIR 2110	20 MHz			LINUX recommended. External receiver control only
PLATH SIR 2115	4x20 MHz			External receiver control only
PLATH SIR 5110	12 MHz			16x768 kHz subbands External receiver control only
PLATH SIR 5115	Full HF			40x768 kHz subbands External receiver control only
R&S EB500	5 MHz	X		No gain control available
R&S EM100 / PR100	500 kHz	X	X
R&S ESMD	15 MHz			External receiver control only
RFSPACE NetSDR	2 MHz
RFSPACE SDR-14	190 kHz
RTLSDR/Noxon USB-sticks	3.2 MHz			Experimental support. Continuous signal up to 2.4 MHz
SDRplay RSP1 & RSP2	6 MHz			Experimental support
SignalHound BB60C	27 MHz
ThinkRF R5500-408	6.25 MHz			VITA 49
ThinkRF R5500-427	6.25 MHz			VITA 49
ThinkRF WSA5000-408	780 kHz			VITA 49
ThinkRF WSA5000-427	780 kHz			VITA 49
WiNRADiO G31DDC	800 kHz
WiNRADiO G33DDC	4 MHz	X
WiNRADiO G35DDC	4 MHz	X
WiNRADiO G39DDC	4 MHz	X		Up to 2 channels + spectrum
Generic VITA 49 receiver support	Max. receiver bandwidth			Can be configured in a wide range for different receiver types
Other generic “Winrad ExtIO” supported receivers	Max. receiver bandwidth			Experimental support

 

* Not all listed receivers are supported with Linux or Windows operation systems.

** The bandwidth of the product is limited by its license/options and the maximum IQ streaming bandwidth of the receiver.

 

Modulation type classifier *

Modulation	Spec. general	Spec. HF	Spec. V/UHF	recognition quality (Eb/No), detection rate > 90%, false alarms < 1%
max. signal bandwidth		20 kHz	50 - 300 kHz (depending on modulation type)
Signal detection min. carrier to noise ratio		6 dB	6dB
Analog modulation types		USB J3E  LSB J3E AM A3E DSB-SC (optional)	USB J3E  LSB J3E AM A3E NFM F3E (Radio frequency >=25MHz) DSB-SC (optional)
MORSE		30 - 250 CPM	30 - 250 CPM
FSK 2	m = 1 - 10	25 - 4800 Bd	1.2 - 25 kBd	11 - 15 dB
FSK 2	m = 0.75 - 1.5		25 - 75 kBd	>= 25 dB
FSK 4		25 - 4800 Bd	1.2 - 25 kBd	11 - 15 dB
(G)MSK		100 - 4800 Bd	1.2 - 125 kBd	14 - 16 dB
Multitone FSKn	5 - 64 tones (shift>sr)	3 - 200 ms (5 - 330 Bd)	3 - 200 ms (5 - 330 Bd)	14 - 16 dB
(D)PSK2 A/B		31.25 - 4800 Bd	1.2 - 125 kBd	7 - 10 dB, A/B Decision: 8 - 15 dB
(D)PSK 4 A/B		31.25 - 4800 Bd	1.2 - 125 kBd	8 - 12 dB, A/B Decision: 10 - 15 dB
(D)PSK 8 A/B		31.25 - 4800 Bd	31.2 - 125 kBd	HF: 8 - 12 dB, A/B Decision: 10 - 15 dB V/UHF: 10 - 14 dB, A/B Decision: 12 - 15 dB
PSK 16		300 – 4800 Bd	1.2 - 125 kBd	14 - 16 dB
Multichannel (D)PSK 2, 4 A/B	max. 10 kHz signal bandwidth; 2 - 64 channels	50 - 300 Hz channel spacing	50 - 300 Hz channel spacing	13 -15 dB
OFDM	25 - 512 channels	25 - 200 Bd 30 - 250 Hz channel spacing	25 - 200 Bd 30 - 250 Hz channel spacing	14 - 18 dB
QAM (optional)	Order: 16, 32, 64	1600 - 4800Bd	1.6 – 25 kBd	22 dB
ASK 2/4			1.2 - 25 kBd Radio frequency:>=300 MHz	20 dB
MCFSK2 (optional)	Modulation index >=1; 2-64 channels	40 - 250 Bd 120 - 1000 Hz channel spacing	0 - 250 Bd 120 - 1000 Hz channel spacing	17 dB
WFM (FM Broadcast only)			Radio frequency: 65 MHz – 108 MHz Bandwidth 50 kHz – 300 kHz
OTH-Radar		Detection only

 

* Measurement interval 4 sec. The parameters specified are limit values that cannot be guaranteed in all combinations.

  

Classifier Modem-Classifications *

HF/VUHF	PMR + SAT	MIL
ACARS-VHF	APCO-25	ALE 3G
CODAN 3212 16 Channel PSK	APCO-25 Phase 2 Downlink	CHN4+4
CODAN 3012 16 Channel PSK	DMR	CIS-45 (33 / 45 Bd)
GSM (<3G)	DMR Continuous	CIS-60
HFDL	dPMR	CIS-93
PACTOR (I, II, II FEC, III, 4)	D-STAR	CIS-112
VDL2	Inmarsat IsatPhone Uplink	CIS-128
	Iridium satphone Uplink	LINK11 (CLEW)
	MPT1327 1200Bd MSK	LINK11 (SLEW)
	NXDN 2400 Bd	MIL-STD-188-110A Serial (single-tone) mode (a.k.a. STANAG 4539)
	NXDN 4800 Bd	MIL-STD-188-110B/C App. C (a.k.a. STANAG 4539 HDR )
	TETRA Downlink	STANAG 4285/4481 (PSK)
	TETRA Uplink	STANAG 4529
	TETRAPOL	STANAG 4539
	Thuraya satphone Uplink
	Yaesu System Fusion

 

* The modem classification uses the Modem Descriptor Files of the decoders. The list of the modems classified depends on the decoder options purchased.

  

Measured modluation type parameters

Parameter	Description	O F D M	C a r r i e r	F S K	F S K n	M S K	C W	P S K	M C P S K	Q A M	A S K	M C F S K	V o i c e	FM B ro ad ca st	U n k n o w n
Modulation	The type of modulation and its probability	x	x	x	x	x	x	x	x	x	x	x	x	x	x
Pitch	Pitch of the modulated voice												x
Type	Type of voice like LSB, USB, AM , FM												x
Symbol rate	The symbol rate in Bd	x		x	x	x		x	x	x	x	x
Order	Modulation order, number of symbol states							x	x		x
Version	Version of PSK A or B							x	x
CPM	Transmitted character per minute						x
Dash Dot Ratio	The ratio between the length of dashes and dots						x
Shift	The measured shift			x	x	x						x
Channel spacing	The measured distance between channel in Hz	x							x			x
Frequency	The center frequency of the signal	x	x	x	x	x	x	x	x	x	x	x	x	x	x
Bandwidth	The overall bandwidth of the signal	x	x	x	x	x	x	x	x	x	x	x	x	x	x
SNR	The signal to noise ratio in dB	x	x	x	x	x	x	x	x	x	x	x	x	x	x
Signal time	Time of measurement	x	x	x	x	x	x	x	x	x	x	x	x	x	x
Number of tones				x	x
Number of channels									x			x

 

The performance of our software products depends on the hardware used.  
Technical parameters can differ under real operational conditions. Specifications subject to change.

Available from software version 19.2 (July 2019).

Decoders and Demodulators

1. MIL and PMR decoders may need an End-User-Certificate (depending on the country of the user)
2. Automatic sideband detection can be achieved via two modems set to inverse sidebands
3. A time gap between message bursts and acknowledge burst must be detectable
4. Separation of slow selcall types cannot be guaranteed
5. Slow multitone modems are recommended to operate with fixed nominal frequency

Our set of standard, military, PMR and SAT decoders is subject to continuous development.
Please download go2SIGNALS decoderlist the current list of available decoders.

 

go2MONITOR Training

go2MONITOR training comprises the complete signal flow from connected receiver to content output of a radio signal. We place particular emphasis on the efficient and task oriented application of the comprehensive operating possibilities.

The aims of our training courses are therefore, in particular, rapid assimilation of information as well as clear administration and presentation of the communicated data. Training on the semi and fully automatic operation of go2MONITOR can be organised on request.

Training content:

• Introduction to operation
• Receiver control
• Scenario analysis (overview of numerous simultaneous emissions)
• Signal processing (processing a concrete signal, classification, demodulation, decoding)
• Display of results (temporal, spectral, merger of raw data and content output)
• Optional: Transfer from manual to automatic mode, creation of automated tasks
• Practical exercises