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SIGNAL-T ST 131 PIRANHA- II Technical Description And Operating Manual

Multifunctional detection devices
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TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N
ST 131 "PIRANHA- II"
ST 131N
MULTIFUNCTIONAL DETECTION DEVICES
TECHNICAL DESCRIPTION AND OPERATING
MANUAL
1

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Summary of Contents for SIGNAL-T ST 131 PIRANHA- II

  • Page 1 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N ST 131 “PIRANHA- II” ST 131N MULTIFUNCTIONAL DETECTION DEVICES TECHNICAL DESCRIPTION AND OPERATING MANUAL...

  • Page 2: Table Of Contents

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N CONTENT Introduction 1 General Characteristic 1.1 Purpose and main features 1.2 List of equipment 1.3 Description of the main components 1.4 Packaging 1.5 Detection channels 1.6 Power supply Operation and display 2.1 Operation 2.2 Indication 2.3 Main menu...

  • Page 3: Introduction

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N INTRODUCTION ST131 “PIRANHA II” is a multifunctional detection device intended for detecting and localization of the special technical means (STM) for surreptitious information gathering. ST131N - a multifunctional detection device that has all the features and functionality of ST131 «PIRANHA II»...

  • Page 4: General Characteristic

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 1 GENERAL CHARACTERISTIC 1.1 Purpose and main features A multifunctional detection device ST131 is intended for detecting and localization of special technical means (STM) for surreptitious information gathering as well as identification of natural and artificial sources of information leakage.

  • Page 5: List Of Equipment

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 1.2 LIST OF EQUIPMENT Basic set Additional set 1 Main unit. 1 “ST131.SHF” - SHF antenna-detector 2 “ST131.UHF” - UHF converter. 2 “ST131.IR” - infrared sensor 3 “ST131.AWL” – wire line adapter. 3 “ST131.TEST”...

  • Page 6: Description Of The Main Components

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 1.3 Description of the main components 1.3.1 The main unit Appointment of connectors and controls are shown in Figures 1 and 2. "I/O" Socket for connection of UHF converter ST131.UHF, SHF-detector ST131.SHF, magnetic sensor ST131.MF and infrared sensor ST 131.IR "GEN"...
  • Page 7 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 1.3.2 Software ST131 ANALYZER PRO software enhance the ability and expands capacities of the device for analyzing and processing of signals. This software implemented the following:  Oscilloscope, spectral and vector analysis, “waterfall”;...
  • Page 8 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 1.3.3 UHF converter "ST131.UHF" ST131.UHF is connected to the "I/O" socket of the main unit. 1 SMA socket. 2 Switch-on and low battery power indicator. 3 ON/OFF switch. 4 Main unit link quality indicator. 5 Screw-threaded hole ¼”.
  • Page 9 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N The “WIRE 0.01-30 MHz” channel is designed for the analysis of signals in the 0.01-30 MHz frequency band and the “WIRE 0.3-15 KHz” channel is for the 0.3-15 KHz frequency band. Connecting to the explored line executes through connectors: •...
  • Page 10 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 1.3.6 Infrared sensor "ST131.IR" This sensor structurally consists of receiving photodiode and pre-amplifier. This sensor is connected to I/O socket of the main unit. The front side of sensor has the screw-thread used for connection of the special monopod.
  • Page 11 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 1.3.8 Magnetic field sensor ST131.MF. St131.MF consists of a ferrite antenna and pre-amplifier. 1 The mode selector"GRAD-MAG" __________________________________________________________________________ Figure 10 The Thread hole ¼” is on the opposite side of the ferrite antenna. ST131.MF operates in two modes: ...
  • Page 12 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 1.3.10 Testing device "ST131.TEST" The "ST131.TEST" is intended to control operability of devices ST131 and ST131N by testing all detection channels in the main unit as well as rest equipment (sensors, antennas, adapters, converters). The "ST131.TEST"...

  • Page 13: Packaging

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 1.4 PACKAGING The ST131 device is packed in a special shock-proof and water-resistant black color case with dimensions 400 x 304 x 165 mm. Special location foam polyurethane plates are installed in the case body for convenient and reliable placement of all components of the device.

  • Page 14: Detection Channels

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 1.5 DETECTION CHANNELS ST131 has four detection channels. Detection channel Frequency range RADIO 0.01-30 MHz 30–4400 MHz 4–18 GHz WIRE 0.3-15 KHz 0.01–30 MHz 30–3000 MHz OPTICAL 770-1650 nm (0.001-30 MHz) ACOUSTO-ELECTRIC 0.01–125 KHz List of channels access is provided by pushing "...

  • Page 15: Power Supply

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 1.6 POWER SUPPLY 1.6.1 Main unit Power supply of the ST131 main unit is provided by means of six AA-type batteries (or rechargeable batteries) or power adapter. Completely filled icon (position 11, Figure 14) corresponds to full capacity of the battery, completely discolored and strikethrough image corresponds completely discharged batteries.

  • Page 16: Operation And Display

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 2 OPERATION AND DISPLAY OF ST131 2.1 OPERATION CONTEXT BUTTONS (4) Definition of the context buttons – depends on the selected detection channel, operating mode in this channel is indicated in the lower line of the display. When pushing or rotary knob changes the buttons context: basic or supplementary.

  • Page 17: Indication

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N “ON/OFF switch” (position 5, Figure 2) is designed to switch on/off the ST131 main unit. “Volume control” (position 3, Figure 2) regulates the output audio level of the built-in loudspeaker or headphones.

  • Page 18: Main Menu

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 2.2.1 OVERLOAD INDICATION The appearance of the inscription "OVERLOAD" (position 5, Figure 14) means that at the entrance to the main unit there is the signal exceeding the allowable maximum input signal at that setting. In the "RADIO 30-4400 MHz"...

  • Page 19: Information

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N "Gain out" – selects level of signal for line and headphones output in the DEMODULATION mode. It defaults to automatic gain control ("AGC"). No use in the “WIRE 0.3-15 KHz” and “ACOUSTO- ELECTRIC”...

  • Page 20: Modes, Sub-Modes And Options

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 3 MODES, SUB-MODES AND OPTIONS following features have been realized in ST131: THREE MODES: “FULL RANGE”, “BAND” and “DEMODULATION”. FOUR SUB-MODES: “SCALE”, “AUTOMATIC ANALYSIS”, “MEMORY” and “MEASUREMENTS”. FOUR OPTIONS: “OSCILLOSCOPE”, “SPECTRAL SUBTRACTION”, “DIGIT” and “NON- LINEAR JUNCTION DETECTOR”...
  • Page 21 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N When you click on the rotary knob or button, a number of auxiliary context buttons appears. FUNCTIONS OF THE AUXILIARY CONTEXT BUTTONS_______________________________ - access to context-sensitive help (under construction). - selects analyzing frequency bandwidth. Function is active in the BAND mode. All possible bandwidth values depend on the selected channel.

  • Page 22: Band" Mode

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 3.2 “BAND” MODE This mode is intended for detailed analysis of the signals within selected bandwidth. Entry to this mode performs from the FULL RANGE mode by pressing on with the appearance of the cursor lines (Figure 20) and secondary pressing on Decreasing of bandwidth increases signal/noise ratio in inverse proportion as well as horizontal resolution by frequency (see section Annex 2).

  • Page 23: Demodulation Mode

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 3.3 DEMODULATION MODE This mode is intended mainly for demodulation and audio control of the investigated signal. Input and output this mode carried out by pressing . In this case, the cursor lines appear to indicate the demodulation bandwidth (Figure 21).

  • Page 24: Automatic Analysis" Sub-Mode

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 3.4 “AUTOMATIC ANALYSIS” SUB-MODE This sub-mode is intended to create a list of signals that exceed a user-defined threshold in the current spectrum. For each detected signal is indicated by its frequency level exceeds the threshold value and signal bandwidth characteristic.
  • Page 25 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N • «AVERAGE» - the analysis is done 8 times and the averaged results will be taken (total cycle is about 1.6 seconds). This option reduces the chance of detection of the accidental spontaneous pulse signal.
  • Page 26 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N Demodulation and listening of signal from the list by clicking on Figure 25 3.4.1 Using the "AUTOMATIC ANALYSIS" sub-mode together with the "SPECTRAL SUBTRACTION" option. To exclude the signals recorded in a detailed pattern (section 3.9), activate the pattern options by pressing before analyzing.

  • Page 27: Memory" Sub-Mode

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 3.5 “MEMORY” SUB-MODE This sub-mode is intended for storage of screen image in non-volatile memory of the device and subsequent indication of: • screen images; • selected signal; • results of work in the "AUTOMATIC ANALYSIS" sub-mode. It is possible to transfer stored data to a PC in form of individual files and integrate them into special software «ST131 Analyzer Pro»...
  • Page 28 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N When displaying the saved image background color of the screen changes to a light green color (Figure 28). Figure 28 CONTEXT BUTTON FUNCTIONS ______________________________________________ - return to list. - saves the signal under the marker (see section 3.5.2). - transition to the current spectrogram with parameters corresponding to the stored image.

  • Page 29: Scale" Sub-Mode

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 3.6 SUB-MODE "SCALE". In this sub-mode the level of signal is represented in the form of a multi-segment scale. Input and output from this sub-mode are performed by pressing "SCALE" is the main mode for the "RADIO 4–18 GHz” channel and auxiliary sub-mode for other channels.

  • Page 30: Measurements" Sub-Mode

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N “MEASUREMENTS” SUB-MODE This sub-mode is activated by pressing the while in these modes "FULL RANGE" and "BAND", a cursor line appears on the graph and context buttons change their meaning (Figure 32).

  • Page 31: Oscilloscope" Option

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 3.8 “OSCILLOSCOPE” OPTION This option is intended for analyzing signals in time domain. Log in with pressing . In the "DEMODULATION" mode transition in the waveform of the demodulated signal occurs immediately after pressing This option is unavailable from the FULL RANGE mode of the “RADIO 30-4400 MHz”...
  • Page 32 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N AUXILIARY CONTEXT BUTTON FUNCTIONS _____________________________________ - access to a choice of synchronization conditions: • «->» - synchronization happens if the instantaneous value of the signal above a predetermined level. • «<-» - synchronization happens if the instantaneous value of the signal is below a predetermined level.

  • Page 33: Waterfall" Option

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 3.9 OPTION «WATERFALL» This option displays signal spectra changes in time and looks like signal amplitude color projection on frequency-time plane. Red color – maximum signal level. Blue – minimal. This indication form helps to identify signalsб...

  • Page 34: Spectral Subtraction" Option

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 3.10 “SPECTRAL SUBTRACTION” OPTION This option can only display those signals that were left after subtracting the current spectrum from previously created ones. The main purpose of creation the pattern spectrum is to use it as a legitimate signal spectrogram, which obviously does not have STM signals within the controlled area.
  • Page 35 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N To use the detailed pattern, you need to press being in the «BAND» mode with not more than 200 MHz bandwidth. If the pattern has not been created, it appears: "The pattern was not created yet."...

  • Page 36: Digit" Option

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 3.11 "DIGIT" OPTION Option is intended to detect and analyze signals related to the standard wireless and cellular data transfer. Figure 37 shows the position of these standards on the spectrogram in the FULL RANGE mode.
  • Page 37 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N Setting the threshold display by pressing button or “RESET” context button. Threshold level of graphic indicator (position 4, Figure 38) will show current signal level or the current noise level if there are no signal.

  • Page 38: Non-Linear Junction Detector" Option

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 3.12 NON-LINEAR JUNCTION DETECTOR OPTION (only for ST131N) This option provides an analysis of wire lines connected to the presence of electronic elements with non-linear characteristics - diodes, transistors, etc. They are, as a rule, power supply elements and input overvoltage protection elements.
  • Page 39 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 1 Level of the second harmonic. 2 Level of the third harmonic. 3 Marker for manual select of a pair. 4 Numerical value of the relative level of the signal. Manual selection of the pair is performed by turning the rotary knob with displaying the selected pair in position 3, Figure 42...

  • Page 40: Working With The St131

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 4 WORKING WITH THE ST131 4.1 WORKING WITH “RADIO” CHANNELS. 4.1.1 PREPARATION FOR OPERATION IN “RADIO 0.01–30 MHz” CHANNEL. Plug in to the "CH1" socket of the main unit with supplied telescopic antenna or with the other, corresponding to a given range.

  • Page 41: Working With The "Radio" Channel

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N  Modern STM are using different kinds of signal formation, modulation and coding. Along with the general detection method, which can detect most of analog and digital radio emitting STM there are some specific STM, where special methods must be applied.
  • Page 42 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 4.1.4.1.1.1 Determination of frequency range Frequency range contraction is possible when additional information available. In case of absence of additional information all possible frequency range on given channel is selected. “Popular”...
  • Page 43 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N Thus, for example, to detect 10µW transmitter being at the center of the circular room with a radius 10 meters must select a span of not more than 10 KHz or if the transmitter power will be 1 mW, it is sufficient 100 MHz band.
  • Page 44 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N Set detection threshold Threshold setting – thin red line – (In indication - is done, with 1dB step by buttons and rotary encoder rotation. Let’s set up threshold on 10dB higher then noise level (on fig- NOISE=-88дБ) i.e.
  • Page 45 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N In case of automatic signal database creation method (“AUTOMATIC ANALYSIS” submode) for calling signal list from memory press then For signal analysis select it from the database (on figure database was created by manual method) and turn on demodulator by pressing .
  • Page 46 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N After going to this mode press . It will set null scale value on the maximum signal level. Select necessary scale of signal level change. In general most dynamic variant (30dB) is used. In general, if you see the signal level about -40 dBm and higher, that means the signal source is pretty close (a few centimeters to one meter).
  • Page 47 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N As an example, some possibilities of the smartphone are following: • Work in almost all telecommunication standards: GSM, 3G, WLAN, BLUETOOTH and LTE (4G). • Transmission of video. • Preserving and subsequent transmission of audio and video data on the basis of the installed software. For example, data compression, followed by transmission to an arbitrary time by LTE broadband channel.
  • Page 48 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N The radiated phone set power depends on the distance to the base station and amounts from hundreds of milliwatts to microwatts. DECT To listen and transfer the information there can be used, for example, phone sets with function of listening rooms or "baby monitor".
  • Page 49 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N  receiving and transmission of audio information with the use of a headset. Emitted power devices of this standard varies from relatively high up to tens of milliwatts (data transmit), and tens microwatts (wireless headsets of cell phones). Additional complexity detection is applicable use in this standard...
  • Page 50 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N In the FULL RANGE mode the pulse sequence with a pulse width of 0.1 ms and a duty ratio of 1:1 with no gaps are detected but when duty ratio of 1:100 the detection time will be about 30 seconds and for duty ratio of 1:1000 - more than 500 seconds.
  • Page 51 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N When there is the radio pulse exceeding a predetermined threshold level, it will be captured and displayed (Figure 46). Localization of STM with RFPS transmission is provided by using the "SCALE" sub-mode and selecting the peak- hold detector with the maximum averaging factor, such as "PEAKx32"...

  • Page 52: Working With The "Wire" Channel

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 4.2 WORKING WITH "WIRE" CHANNELS. 4.2.1 GETTING STARTED IN THE “WIRE 0.01-30 MHz” and “WIRE 0.3-15 KHz” CHANNELS Connect the ST131.AWL adapter to the ST131 main unit. Connection is made to the same name terminals.
  • Page 53 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N For detection bugging devices, galvanically connected to the wire lines, use the option «Non- linear junction detector» (only for ST131N). Powering some types of Bugging devices is done by the same lines, which are used for intercepted data transfer.
  • Page 54 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N Signal level Mark for manual pair selection Pair number Mark of automatic pair control Numerical relative signal level value ___________________________________________________________________________ Fig. 52 Feature of automatic level of signal control is to move the mark 4 to pairs of numbers with the indication of the signal level in the pair, which is marked.
  • Page 55 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 4.2.5 Operation in the “WIRE 0.01–30 MHz” channel. In this range checking for presence of high-frequency signal in lines is done. In general the sequence of modes used corresponds to the "RADIO 30-4400 MHz" channel. Additionally, provided the access to the option "OSCILLOSCOPE"...

  • Page 56: Working With The "Optical" Channel

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 4.3 WORKING WITH “OPTICAL” CHANNEL. Connect IR sensor ST131.IR to the “I/O” socket of the main unit. Click in start MENU the "OPTICAL" channel. When the initial selection of that channel the screen information will corresponds...

  • Page 57: Working With The "Acousto-Electric" Channel

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 4.4 WORKING WITH "ACOUSTO-ELECTRIC" CHANNEL. 4.4.1 GETTING STARTED WITH MICROPHONE. Connect microphone to the «CH2» jack corresponding to the input parameters of the channel (see section SPECIFICATION). For research in the field of ultrasonic signal frequencies use special microphones, for example 40BE with microphone preamplifier type 12AL produced by G.R.A.S.
  • Page 58 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 4.4.4 OPERATION WITH MAGNETIC FIELD SENSOR ST131.MF. Select working range (0.01-31.25 KHz) rotating rotary knob. Operation is possible in two modes: MAGNETOMETER (mode switch in position «MAG») DIFFERENTIAL (mode switch in position «GRD») 4.4.4.1 "MAGNETOMETER"...

  • Page 59: Working With The "Non-Linear Junction Detector" Option

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 4.5 WORKING WITH OPTION "DETECTOR OF NON-LINEAR TRANSITION". Connect the ST131.AWLN adapter to the ST131 main unit. To obtain reliable results it is necessary to disconnect the explored line from external sources and consumers as well as remove any explicit loads and the length of the line should not exceed 200 Connect ST131.AWLN to the explored line using the RJ-45 connector or the probe connector (Figure 5).

  • Page 60: Main Unit Firmware Update

    The screen should be appeared with this message: The firmware can be found on the supplied flash drive or online www.signal-t.ru/eng. Connect ST131 to your computer using the USB cable. Wait for the USB drivers installed. Select the appropriate version of the firmware and run the program.

  • Page 61: Technical Specifications

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 6 SPECIFICATIONS DIGITAL SIGNAL PROCESSING MODULE Simultaneous processing frequency range, MHz 0.01-30 Resolution of ADC, bits 10, 14, and 16 Number of FFT points 32768 (with PC software) 512 (the ST131 main unit) DDC filter bandwidth, MHz 0.0005-10 MHz Demodulators...
  • Page 62 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N Frequency range 3, MHz 30-3000 Displayed noise level  FULL RANGE, dBm Minus 90 (minus 100 for PC software)  1 KHz bandwidth, dBm Minus 115 Maximum input level, dBm Analysis speed, not less, GHz/sec Values of bandwidth, MHz 2048, 1024, 512, 200, 100, 50, 20, 10, 5, 2,...

  • Page 63: Certificate Of Acceptance

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 7 CERTIFICATE OF ACCEPTANCE ST131/ST131N multifunctional detection device №_______________meets specifications and is fit for use. Release Date _________________...

  • Page 64: Warranty

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N 8 WARRANTY INFORMATION. 8.1 The manufacturer guarantees that each manufactured product meets all requirements of the specifications for a period of 12 months from the date of sale. 8.2 The manufacturer shall, within the warranty period if free of repairs are required, its subsidiary and other parts, until replaced by the instrument as a whole, if it is during this time will be damaged or its performance will be lower standards specifications.
  • Page 65 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N COUPON № 1 For warranty repair (maintenance) multifunctional search device ST131 number _______________ Made ________________ Seal of the manufacturer Sold ____________________________________________(Trade name of the company) Date of sale _____________ 201__Seller__________________ Vendor Seal (signature) of commercial enterprise___________________________________________________________________________ Spine ticket number 1 for warranty repairs (maintenance) of the ST131 №...

  • Page 66: Annex 1

    TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N ANNEX 1 Selection of the options of signal averaging. In the context of search activities it can be divided into two use tasks of detectors: signal detection and the source location. For the first task, in the beginning of the search, the peak-hold detector (“PEAK”) is selected.
  • Page 67 TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N ANNEX 2 DIGITAL SIGNAL PROCESSING. SOME OBSERVATIONS. Digital signal processing based on the FFT provides a better, compared with the analog reception path, the sensitivity at the same display width of the spectrum. We will show the following relation: F=2B/N * , where:...

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