Triax MCT 048B User Manual
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Triax MCT 048B User Manual

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User manual
TRIAX TV meters MCT 048B
Model
TRIAX TV meters MCT 048B
1.0
Version
07/2020
Date
Item no.
812951
EN

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  • Page 1 User manual TRIAX TV meters MCT 048B Model Item no. TRIAX TV meters MCT 048B 812951 07/2020 Version Date...
  • Page 2 This product contains one or more programs protected under international and US copyright laws as un- published works. They are confidential and proprietary to Dolby laboratories. Their reproduction or disclo- sure, in whole or in part, or the production of derivative works there from without the express permission of Dolby Laboratories is prohibited.
  • Page 3 Thank you for purchasing this TRIAX product and therefore trusting our company. Our different teams (research department, production, sales department, after-sales service…) are aiming at satisfying your wishes by designing and updating very advanced appliances. To obtain the best performance from this product please read this manual carefully.
  • Page 4 It shall subscribe, at its own expenses, any insurance required for the transport. The TRIAX company reserves the right to refuse any product wrongly conditioned and not to take in charge any break consec- utive to the transport.
  • Page 5 March 1, 2015: Spare parts are not available to the consumer. TRIAX offers the supply of spare parts during repair by its service. Consumable parts are provided according to the legislation applicable to them (case of batteries).

  • Page 6: Table Of Contents

    TABLE OF CONTENTS Important information ......................9 Particular precautions ............................. 9 Security instructions ............................9 Symbols and definitions ..........................9 Quick start-up ........................11 Presentation of the appliance ........................11 Signal spotting .............................. 12 2.2.1 Checking a terrestrial antenna ......................12 2.2.2 Installation of a terrestrial antenna ......................
  • Page 7 Terrestrial check ............................38 Autoset ................................. 42 Measures – TV – Spectrum.......................... 44 7.3.1 AutoLock function..........................44 Terrestrial setup: ............................45 Creation or modification of setups in the library ................... 45 Echo / Guard interval ............................ 46 Configuration ..............................48 Measures ..........................
  • Page 8 15.1 Alert messages ............................76 16 Maintenance ........................78 17 Technical specifications ....................80 17.1 Technical specifications ..........................80 17.2 Digital measurements ..........................81 17.3 Divers ................................ 83 17.4 General specifications ..........................84 17.5 Accessories .............................. 84 17.6 dBµV, dBmV, dBm conversion ......................... 85 17.7 Typical values for measurements ......................

  • Page 9: Important Information

    • In case of failure or for the maintenance of the appliance, only a qualified personal shall be entitled to work on it. In such a case, it is required to use TRIAX spare parts. • Do not open the appliance: risk of electric shock.
  • Page 10 Symbols on the appliance: Attention: Refer to the manual. Shows a risk of damage for the material connected to the in- strument or to the instrument itself. Ground: Grounded accessible parts. Product for recycling.

  • Page 11: Quick Start-Up

    Pour brancher le signal à analyser Important keys: The MCT 048B is an appliance with a capacitive touchscreen. This requires a soft handling. No glove and no stylus should be used, so that the triggering should be taken into account.

  • Page 12: Signal Spotting

    In this case, the Autoset function allows a scan of the channels that the antenna detects. Plug the cable of your antenna to the MCT 048B (take care to use an adequate adaptor) Turn on your appliance, then select terrestrial mode : The Home page appears on screen.
  • Page 13 Press START. The appliance searches until the end of the scan and turns directly to the Measures page. If no channel has been found, see the next chapter. On this new page, press Prog, select the channel that you want to display. Then you can press TV key to watch the image of the signal.

  • Page 14: Installation Of A Terrestrial Antenna

    Use of the terrestrial check 2.2.2.1 Use of the spectrum Plug the cable of your antenna to the MCT 048B (take care to use an adequate adaptor) Turn your appliance on. Press the Measures-TV-Spectrum key Press the Spectrum touch: Access to full SPAN mode...
  • Page 15 You can now display the level, the BER/MER of the signal selected on the same page by pressing the key.

  • Page 16: Use Of The Antenna Pointing

    2.2.2.2 Use of the Antenna pointing The appliance gets an antenna pointing mode in order to regulate quickly and easily your terrestrial antenna. To access to the antenna pointing mode menu from the HOME page, press The following page appears : Set your emitter name :...
  • Page 17 Enter 4 frequencies of the emitter you want to check. You can find many different French transmitters on the website : https://www.matnt.tdf.fr/ Slowly orientate the antenna until hearing the locking melody and getting the best quality...

  • Page 18: Installation Of A Satellite Dish

    No transmitter found, bad reception quality → red smiley Average reception quality (< 50%) → orange smiley Good reception quality (> 50%) → green smiley 2.2.3 Installation of a satellite dish Connect the satellite dish to the appliance. Select satellite mode and put into service the Remote power supply by pressing « yes » when the following message appears: Press to access the Check Sat mode...
  • Page 19 No found transponder → red smiley Average reception quality (< 50%) → orange smiley Good reception quality (> 50%) → green smiley Reminder: transponder = satellite channel To check if the aimed satellite is the right one: press the NIT key The appliance searches the MPEG NIT table on one of the 4 transponders and displays the name of the sat- ellite: Attention: The displayed name depends on the content of the MPEG NIT table.

  • Page 20: Presentation

    3 Presentation General -The field strength meter MCT 048B is an appliance designed for the installation and maintenance of any broadcasting and reception installations of analogical and digital terrestrial television channels or satellites. - The band ranges between 5 MHz to 2400 MHz; this allows accurate measurements on all analogical tele- vision standards, FM carrier waves and the various digital standards DVB-T/T2, DVB-S/S2, DSS.

  • Page 21: Description Of The Appliance

    Description of the appliance 7’’ capacitive touchscreen high resolu- Fastening tion for straps RF socket with F/F adapter Optical FC APC input Remote supply light with protective plug Ethernet socket USB A socket ON/OFF switch RF F output of the optical option to link to the RF F input of the appliance via the pro-...

  • Page 22: Power-Up

    Battery Attention: Any intervention on the battery requires the disassembly of the appliance and should be made by a TRIAX technician. Use only batteries provided by TRIAX. Security advice: ➔ Do not throw into the fire or heat up the battery pack ➔...

  • Page 23: External Power Supply

    Charge the device only when the device is off. Charge the device only with the provided power supply block. The battery is 80%-loaded after 2 hours. The total charge is reached after 3 hours. The autonomy is defined in terrestrial mode with the lighting of the screen decreased, without remote- supply, interfaces not connected and sound at 10% External power supply The appliance works under 15V (1 A) power supply.

  • Page 24: Man-Machine Interface

    5 Man-machine interface Content of the screen MCT 048B is an appliance with a capacitive touchscreen. This requires a soft handling. No glove and no sty- lus should be used, so that the triggering should be taken into account. You will recognize the « keys » by their dark grey color (example: the home key: You can also select lines in tables.
  • Page 25 The Home page allows the navigation through all functions of the appliance: HOME Page in terrestrial mode HOME Page in satellite mode On all pages, we have this informations: Indication of the values Indication of the position of the Page title Tension and Current of switch or of the SatCR (position Indication of...

  • Page 26: Changing Name Or Value

    To navigate through a table inside a page or a window, a vertical slide appears with arrows to move up and down the table. To move faster, you can slide a cursor with your fingers. Move up through the table Cursor to navigate up or down Move down...

  • Page 27: Change With Selection

    5.2.2 Change with selection When pressing a key, you may have a window with multiple choice. You only have to press the value you want to validate it. This key allows you to cancel and exit this window, like in the example below: In this example, the bandwidth changes from 8 to 6 MHz: 5.2.3 Change with virtual keyboard...

  • Page 28: List Of Setups

    List of setups In order to make easier the recall of data on field, the appliance uses 500 setups in satellite and 500 setups in terrestrial. Example of list of terrestrial setup Example of list of satellite setup A setup is made of: •...

  • Page 29: Satellite Mode

    6 SATELLITE mode When the satellite mode is selected, a message appears with the request of starting Remote power supply of the satellite dish: Once the TV supply activated or not, the HOME page of the satellite mode appears: We will see in this chapter the various menus available from HOME page.

  • Page 30: Check Sat

    Check Sat Press to access Check Sat mode. Name and position of the satellite Global quality indi- cation Frequency, polarization, band, level and quality The appliance has 32 possible orbital positions for satellites. It is provided with near of 10 satellites regis- tered.

  • Page 31: Updating Satellite

    You can update frequencies of the checks sat by consulting the file PDF posted on-line on the site web of TRIAX. . You have to modify frequencies, following the previous paragraph and using the file updated on the web site of TRIAX.
  • Page 32 If the appliance is not synchronized on all four transponders, the quality indication is red. If the appliance is synchronized on all four transponders but the reception quality is aver- age, the quality indication is orange. Good reception quality (> 50%) → green smiley. Attention: 4 transponders To identify a satellite, it must be synchronized on all...

  • Page 33: Checking The Aligned Satellite

    6.1.3 Checking the aligned satellite To check if you have aimed the right satellite, press the NIT key. The appliance searches the MPEG NIT table on one of the 4 transponders and displays the name of the satellite: Attention: The displayed name depends on the content of the MPEG NIT table. Some distributors provide no (or poor) such table.

  • Page 34: Autoset

    Autoset This mode allows an automatic research of setups and to provide information about the current place. You can access it through the key on page Home. A green check shows that the parameter is included in the research. If there is no green check, the parameter will not be taken into account for the research.

  • Page 35: Measures - Tv - Spectrum

    Any detected channel will be registered into the fist available setups of the library, starting from the end of the table. New found channels are added one by one into the first available setups of the library, starting from the end of the table Measures –...

  • Page 36: Autolock Function

    6.3.1 Autolock function This function is design to lock on a digital signal (terrestrial, cable or satellite) You just have to enter the frequency or the channel (for terrestrial), then press AutoLock, The instrument will find automatically in few seconds the digital standard, the modulation type and all other parameters of the signal.

  • Page 37: Creation Or Modification Of Setups In The Library

    6.4.1 Creation or modification of setups in the library To create or modify a setup in the library, you have to choose a line in the table. A window appears: Attention: If the line contains a setup, it will be erased. To cancel, press: You may erase the setup from the list by pressing the check to the left of the setup or to the setups you have to delete.

  • Page 38: Terrestrial Mode

    7 TERRESTRIAL mode When terrestrial mode is selected, HOME page of terrestrial mode appears: We will see in the chapter different available menus you can access from HOME page. Remote supply is allowed pushing key : After, you can choose voltage level of remote supply : Terrestrial check The appliance is provided with a terrestrial check in order to regulate quickly and easily your terrestrial an- tenna.
  • Page 39 Set your emitter name :...
  • Page 40 Enter 4 frequencies of the transmitter you want to check. You can find many different French transmitters on the website : https://www.matnt.tdf.fr/...
  • Page 41 Slowly orientate the antenna until hearing the locking melody and getting the best quality No found transponder → red smiley Average reception quality (< 50%) → orange smiley Good reception quality (> 50%) → green smiley Press key permits to list the services distributed on the multiplex:...

  • Page 42: Autoset

    Autoset This mode allows an automatic research of setups and to provide information about the current place. You can access it through the key on page Home. A green check shows that the parameter is included in the research. If there is no green check, the parameter will not be taken into account for the research.
  • Page 43 Any detected channel will be automatically registered at the end of registered setups: New found channels are added one by one into the first available setups of the library, starting from the end of the table...

  • Page 44: Measures - Tv - Spectrum

    Measures – TV – Spectrum SPECTRUM mode full screen mode Autolock : Automatic search of setup Mode 7.3.1 AutoLock function This function is design to lock on a digital signal (terrestrial, cable or satellite) You just have to enter the frequency or the channel (for terrestrial), then press AutoLock, The instrument will find automatically in few seconds the digital standard, the modulation type and all other parameters of the signal.

  • Page 45: Terrestrial Setup

    Example for terrestrial (frequency 611MHz): For more information on measure page, see chapter Measures Terrestrial setup: Press allow you to access to the setup list: Creation or modification of setups in the library To create or modify a setup in the library, you have to choose a line in the table, a window appears:...

  • Page 46: Echo / Guard Interval

    You may erase the setup from the list by pressing the check to the left of the setup or to the setups you have to delete. Then click the basket and select the deletion of the selected setup: From this window, you can create a terrestrial setup. To proceed, see chapter 5 Man-machine interface ➢...
  • Page 47 Pressing changes the horizontal scale (distance). Horizontal scale can be set in µs, km or miles by pressing Moving measurement arrow can be done by screen touch, or by automatic search keys The end of the guard interval is displayed with a yellow line. Reminder : Remember: In terrestrial TV broadcasting, the received signal on the antenna comes from several possible ways: the echoes.

  • Page 48: Configuration

    Yellow line, Main signal Guard interval limit Echos out of interval Pre-echo Measurements form arrow posi- tion Relative amplitude in dB and delay in µs (distance in km) from the main signal (0 pulse) can be measured. The yellow line represents the end of the guard interval. Echoes and pre-echoes (pulses) above the yellow line disturb the signal and must be reduced as much as possible.

  • Page 49: Measures

    8 Measures Setup modifications The various parameters are: • The name of the setup • The frequency of the emitter or transponder (and the true frequency of satellite) • The standard and bandwidth for DVB-T/H and DVB-T2 • The corresponding channel number for terrestrial mode •...

  • Page 50: Satellite Band

    Example in TNT : Signal level Signal/noise ratio of the signal The appliance makes different measurements according to the current standard. The other possible measurements are: • Average measurement • Peak measurement • Power measurement. The best is to be the closest possible of the green bar without exceeding it. For the MER measure, the value must be superior to the mini threshold.

  • Page 51: Terrestrial Band

    Terrestrial band The appliance automatically makes level measurements on the Video carrier wave. The following table sums up the measurement types and the frequencies of the audio carrier waves for each standard: Standard Video carrier Measure Sound carrier Mono stereo NICAM negative, AM peak...

  • Page 52: Digital Measurements

    DVB-S2 Seuil min Seuil max Digital measurements In digital measurement mode, in addition to the RF level and to the C/N here above, the appliance also dis- plays the various BER (Bit Error Rate), the PER (Packet Error Rate) and the MER (Modulation Error Ratio) under DVB-T/T2, DVB-S/S2 or DSS.

  • Page 53: Dvb-T

    DVB-T REED DECODAGE VITERBI DEMODULATEUR TUNER SOLOMON MPEG BERi BERo Display of the measures of: • BERi: error rate before Viterbi • BERo: error rate after Viterbi • PER: error rate after Reed Solomon (error rate packet) • MER: modulation error rate BERx: bits’...

  • Page 54: Dvb-T2 / T2 Lite

    DVB-T2 / T2 Lite DECODAGE DEMODULATEUR LDPC TUNER MPEG BERo BERi Display of the measures of: • BERi: error rate before LDPC • BERo: error rate after LDPC • PER: error rate after BCH (lost packets) • MER: modulation error rate Recall: LDPC: Low Density Parity Check BCH: Bose Chauhuri Houquenohem...

  • Page 55: Dvb-S / Dss

    DVB-S / DSS REED DECODAGE VITERBI DEMODULATEUR TUNER SOLOMON MPEG BERi BERo Display of the measures of: • BERi : error rate before Viterbi • BERo : error rate after Viterbi • PER : error rate after Reed Solomon (error rate paquet) •...

  • Page 56: Dvb-S2 / S2X

    DVB-S2 / S2X DECODAGE DEMODULATEUR LDPC TUNER MPEG BERo BERi Display of the measures of: • BERi : error rate before LDPC • BERo : error rate after LDPC • PER : error rate after BCH (lost packets) • MER : modulation error rate Recall: LDPC: Low Density Parity Check...

  • Page 57: Spectrum Analyser

    9 Spectrum analyser Pressing SPECTRUM gives access to the SPECTRUM ANALYSER function. (graphical representation frequency / amplitude of the present signals in the input of the device) Satellite Terrestrial To swap from between satellite and terrestrial, go to Home page and press , choose the band you want and return to spectrum The input attenuator is automatically tuned according to the level of the signals measured.

  • Page 58: Image And Sound

    10 Image and Sound Pressing the TV zone gives access to the TV function. 10.1 Digital TV The name of the service and its main characteristics are displayed on top left of the screen. • 720x576i: picture resolution 720 pixels / line, 576 lines, interlace •...

  • Page 59: Full Screen Mode

    10.3 Full screen mode Pressing the key displays the image in full screen; only remain the battery level and the intensity + voltage of the remote power supply: To exit, you only have to touch the screen anywhere. 10.4 Audio To set the volume, press an adjustment bar shows up: The instrument can decode the following digital sound formats:...

  • Page 60: Table Of Services

    10.5 Table of services Pressing gives access to the list of services: This function allows selecting the channel you want to display. You only have to press the line you want.

  • Page 61: Lnb - Diseqc (Satellite Mode)

    11 LNB – DiSEqC (Satellite mode) This page allows or not the activation of the remote power supply. In this page, there is the possibility to use normal mode or expert mode. Expert mode allows to carry out a larger number of parameters. To access the expert mode, press: Page in simple mode Page in expert mode...
  • Page 62 Configuration line in normal mode: - LNB : LNB type and local oscillators LO1 (low band) and LO2 (high band) - LO selection: band commutation on the LNB (22kHz, ToneBurst or DiSEqC) - Polar selection: polarization commutation on the LNB (13/18V or DiSEqC) Configuration line in expert mode: - LNB : LNB type and local...

  • Page 63: Lnb

    11.2 You must choose the type of NLB (parable head) present on your installation. • L band : no LNB head BIS frequencies (satellite intermediate frequencies) from 200 to 2400MHz no local oscillator frequency (OL) • C band : frequencies from 3,650 to 4,200 GHz local oscillator frequency 5150MHz (OL) adjustable •...

  • Page 64: Switches

    11.3 Switches 2-satellite switch 4-satellite switch * 22 kHz * DiSEqC Committed or Uncommitted * ToneBurst (MiniDiSEqC) *DiSEqC Committed ou Uncommitted Uncommitted 16-satellites switch * DiSEqC Committed + Uncommitted...
  • Page 65 Switch line Uncommitted line Satellite Position Commande DiSEqC Position Commande DiSEqC Pos A Option A + Position A Pos 1 Input 1 Pos B Option A + Position B Pos 1 Input 1 Pos C Option B + Position A Pos 1 Input 1 Pos D...

  • Page 66: Motorized Satellite Dish Control

    11.4 Motorized Satellite dish control The appliance sends a DiSEqC command that triggers the rotation of a motorized satellite dish. In this example, the position is 2 (1 to 127 pre-loaded positions in the positionner) If the positionner is on No, it is deactivated See chapter Man-machine interface for any change.

  • Page 67: Dcss

    11.5 DCSS Description: DCSS Digital Channel Stacking system: signal distribution system using frequency transposition. Used in satellite distribution for multiple or single dwelling, with several set top boxes. To give several receptors access to the whole spectrum and all polarizations, you need one coaxial cable per receptor and a suitable installation (multiple LNB, Quattro and multi-switches).
  • Page 68 The DCSS mode has priority on all other modes: selection polarization, selection OL, switches committed and uncommitted and positionner. 2 Modes : SATCR : Satellite Channel Router, standard EN50494 (or SCD, Unicable, …) Distribution of the satellite signal with only one coaxial cable to 2, 4 or 8 different receptors. SCD2 : Single Cable Distribution v2, standard EN50607 (or SCD2, Unicable II, JESS) Distribution of the satellite signal with only one coaxial cable to a maximum of 32 different receptors.

  • Page 69: Influence Of The Dcss On The Spectrum Analyzer

    SCD2 (EN50607) : • SLOT x: active Slot choice • CONFIG: access to each slot configuration Slots lists, frequencies, switches, PIN codes • INITIALISATIONS : 32 predefined slots • ALLOCATION : states of the 32 possible slots • DETECT : automatic detection of slots (DISEQC2.0 based) 11.5.1 Influence of the DCSS on the spectrum analyzer...

  • Page 70: Configuration

    12 Configuration For configuration, go Home page of terrestrial mode or satellite mode, then press configuration 12.1 Language You can select your language by pressing the « flag » (below). Press the flag corresponding to your language: 12.2 Measurement unit This key allows you to select the measurement unit of the appliance: •...

  • Page 71: Frequency Map

    12.3 Frequency map This key allows you to select the terrestrial frequency map of the appliance: 12.4 Update See chapter Software update for more details. 12.5 Factory recovery A complete set-up of the appliance under its FACTORY configuration, with confirmation...

  • Page 72: Configuration Import/Export

    And you can import from a USB stick this configuration with the touch “Configuration import”. You can also update checksat configuration available on TRIAX’s website. Attention: Take care that the remaining battery life is sufficient (> 30%), else plug the...

  • Page 73: Software Update

    The update requires an USB stick. To achieve the update: - Download the update ZIP file on our website (www.triax.com - Insert a USB stick on your PC - Unzip the file onto the root of the memory stick - Pull the USB stick off from your computer...

  • Page 74: Connection Of The Appliance To A Pc

    14 Connection of the appliance to a PC The appliance has ETHERNET interface that make it possible to connect directly to a PC. For this type of connection, no driver is necessary. Connect your appliance to your PC by using a crossed ETHERNET cable (available in option). Configuration of the connection: Ethernet connection of your appliance to the PC.
  • Page 75 Attention: If the PC has already been connected to Ethernet (network, modem…), it is necessary to reboot the PC before connecting your appliance. For the Ethernet connection of your appliance to a computer network, see the following scheme: 1) Contact your network adminis- 2) Type the IP address and trator to get a free IP address the subnet mask in the ap-...

  • Page 76: Displayed Messages

    15 Displayed messages The appliance may display messages while working. 15.1 Alert messages Low battery: the appliance is about to shut off in a few minutes. Confirmation request for an important action. Remote power supply issue: cable under tension or excess intensity above maximum.
  • Page 77 Messages of the same king may show up; the pop up window is an alert; the corresponding message ex- plains the issue.

  • Page 78: Maintenance

    CONNECTIONS Erroneous measures At any measurement This "advice" does not engage the responsibility of TRIAX. It guarantees the best possible use of the characteristics and the preservation of the product. Routine maintenance: The basic maintenance is simply cleaning the outside of the appliance. Any other operation requires a trained personal.
  • Page 79 100% good functioning pixels in the display zone. They specify a number of possible de- fective pixels at the surface of the screen. The TRIAX quality service has preconditioned the mounting of the screen on your instrument to the respect of the acceptance conditions of the manufacturers.

  • Page 80: Technical Specifications

    17 Technical specifications 17.1 Technical specifications Technical specifications Terrestrial band Satellite band Frequencies Range 5-1005 MHz 200-2400 MHz Resolution measure 50 kHz, display 1 kHz measure 1MHz, display 1MHz Level measurements Dynamic range 20-120 dBµV 20-120 dBµV Units dBµV, dBmV, dBm Accuracy ±2dB +/- 0.05dB/°C Resolution...

  • Page 81: Digital Measurements

    17.2 Digital measurements DVB-T CBER (avant Viterbi BERi) Bit Error Rate (BER) VBER (après Viterbi BERo) UNC (paquets perdus PER) Modulation Error Rate(MER) 15 - 35dB Sensitivity < 35dBµV Bandwidth 6MHz, 7 MHz, 8 MHz FFT type 2k, 8k Constellation QPSK, 16QAM, 64QAM Viterbi rate 1/2, 2/3, 3/4, 5/6, 7/8...
  • Page 82 DVB-S, DSS CBER (before Viterbi BERi) Bit Error Rate (BER) VBER (after Viterbi BERo) UNC (lost packets PER) Modulation Error Rate(MER) 0-20dB Sensitivity < 47dBµV Symbole rate 1 to 50Ms/s Constellation QPSK Viterbi rate 1/2, 2/3, 3/4, 5/6, 7/8 Spectrum inversion Auto Standards ETS 300-421...

  • Page 83: Divers

    17.3 Divers Remote supply Terrestrial Satellite 5V/13V/18 V/24V 13/18 V Tension 500 mA max (300mA for 24V) 500 mA max DiSEqC 2.1 control of dish motor DiSEqC switches committed & uncommitted bi-directionnal 22 kHz, ToneBurst Mini DiSEqC (22kHz) SCD /SATCR EN 50494 8 slots max Single cable satellite distribution...

  • Page 84: General Specifications

    Supplied with: main adaptor, battery, user’s manual (CD-ROM), F/F adaptor, protective pouch with belt. Optional accessories: • Car cigar lighter adaptor • Carrying bag • Luxury backpack • Sun protector + Rain protector + coat hook • Rain protector Contact our sales department TRIAX.

  • Page 85: Dbµv, Dbmv, Dbm Conversion

    17.6 dBµV, dBmV, dBm conversion • dBμV is a logarithmic ratio between a measured voltage Ud and a reference voltage Ur. The reference voltage is Ur = 1 μV N = 20 log (Ud/Ur) • dBmV is a logarithmic ratio between a measured voltage Ud and a reference voltage Ur. The reference voltage is Ur = 1 mV N = 20 log (Ud/Ur) •...
  • Page 86 Peut être sujet à modification sans préavis Copyright © 2020 TRIAX. All rights reserved. The TRIAX Logo and TRIAX Multimedia are registered trademark(s) of the TRIAX Company or its affiliates. TRIAX A/S | Bjørnkærvej 3 | 8783 Hornsyld | Denmark...

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