Home

User Manual

1. 0 MX Rh e MPX Sp D RDSRBDS Aie s swiichin toRDSmode frequency entering the frequency and clicking for example 91 9 on Tune button For some operations internal variable named webwaitingfor indicates whether the operation has completed or not webwaitingfor R oe DE Frequency Deviation Acquire D RDS RBDS Acquire Bandscan Acquire tuning to a new frequency Basic state of the FM Scope application is indicated to the website via variable named updating Modulation Power running 1 or not 0 MPX running 1 or not 0 Fast peak deviation bar indicator active 1 or not 0 Measuring mode 0 or other mode 1 Interaction with running script The web server provides not only the value viewing and basic control but can take control over a FM Scope script as well The prerequisite is that the script processes variables passed from the web site Typically the web site provides a form for user input Once the user or JavaScript submits the form data by either GET or POST method the script running in the FM Scope will detect the variable content change and make corresponding operations All parameters passed from the form are visible for the script under the same name of variable i e the parameter content can be accessed by parameter Summary The web site cannot execute script commands directly but if a script is already running the web site can control its flow by means
2. PIRA75 P175 M Broadcast Analyzer User Manua Version 1 5 rev 5 Web http www pira cz E mail mail pira cz Table of Contents DNC OCG CN OU aa 3 DA IAS OC EECC PCC NRC NC RERO HN 3 Measurements indications and QU pUES ooooooooouooooooooonnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn non nn nn nono hii i ii i ii iii i iii nn nn nn nn ennan nono non nn nn nn nn nn nn ananas 3 Technica IS PEeCHICA M 4 Power Suppl Pool D E Et IEEE SEED 6 OWE o T 6 Mamnmboatd conposition PIa PNE 7 ein A aa aai aa aLi ai aaa a aa daai aaa aiiai ai aaaea 8 dc E E E E E E E E E E 9 Operatino TRS CHIC ons seian n 10 POV e E E eee eee 10 diario IA A A 10 hau A PP OE 10 PVE ASU MENS id ina 12 A A A OE 12 Overall frequency deviation peak frequency deviation tota C RE 14 AA AAA E A A 14 AA A A E D 14 lA A 15 Madulaton power NEA Pon P ooo 15 EOG y devotion nO TAM aeia EE E E 16 eede EE at E a RAA A A 17 eS Wa E EE H 17 Simple stereo Dalance Meteor nea 17 Enea o a e E T E TE E E E A E A E TT MEM E E T T 18 Radio Dita SV SCM CSCO CIN ratero E E EOE TE E E EE EE 19 USB and COM Port Communication wasi ia 23 Comectns ne F M anane oa radiata aa 23 List of commands and configuration TOglSteTS oooooooooooooooooononnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn non non non nn n
3. 20 times per one second From this array of values the MAX AVE and MIN values are calculated and showed These values represent signal characteristics in last second The measurement is fully continuous over the signal without any gaps Moreover MIN Hold and MAX Hold functions are provided The MAX Hold value represents the maximum deviation found in last 10 seconds Since 1t may be affected by pulse interference interpret 1t very carefully Remember that any Hold or MAX function based on a single number cannot fully and adequately describe the FM modulation characteristics as a histogram function can described thereinafter Pilot deviation In FM stereo broadcasting a pilot tone of 19 kHz indicates that there is stereophonic information The receiver doubles the frequency of the pilot tone and uses it as a phase reference to demodulate the stereo information The L R main channel signal is transmitted as baseband audio in the range of 30 Hz to 15 kHz The L R subchannel signal is modulated onto a 38 kHz subcarrier occupying the baseband range of 23 to 53 kHz The deviation range of the FM carrier caused by pilot tone 1s from 6 0 kHz to 7 5 kHz The recommended value 1s 6 8 kHz RDS deviation Radio Data System RDS 1s a standard from the European Broadcasting Union for sending small amounts of digital information using conventional FM radio broadcasts Radio Broadcast Data System RBDS is the official name used for the U S ve
4. modulationpower savebitmap cf mscopeldataipm freq jpg frequencydeviation acquire frequencydeviation histogram 1 frequencydeviation savebitmap c fmscope data hi freq jpg frequencydeviation histogram 0 frequencydeviation savebitmap c fmscopeidataidp freq jpg mpx run sleep 10 mpx stop mpx savebitmap c fmscopeidataimx freq jpg setmode 1 sleep 60 rds getdata rds getstatistics rds savedata c fmscope data rd freq txt createreport c fmscope data rp freq txt ftpconnect ftpput hiVofreq jpg ftoput dp freq jpg ftpoput mx freq jpg ftoput pm freq jpg ftpput rd9ofreq txt ftpput rp9ofreq txt ftpdisconnect LA PARA IA m M return Script file example 7 Permanently monitor the station send email if there s no signal or no audio for more than one minute tune 106 2 setmode 0 set signal_counter set audio_counter repeat getquality send X if Yoquality lt 3 inc signal counter goto stage2 endif set signal counter stage2 if Yotsmaxhold lt 25 inc audio_counter goto stage3 endif set audio_counter stage3 if signal_counter 5 call send_email endif if Yoaudio_counter 5 call send_email endif sleep 10 goto repeat send_email email to info radio com luis radio com email subject FM Scope Message email body Failure detected on frequency email send return 53 Script file example Save stations from the bandscan to an Excel file bandscan acqu
5. Although there is no calibrated frequency normal included for this purpose 1t can be simply found in the band If any station can be considered as a frequency etalon the unit can be used to adjust right carrier frequency on the transmitter with 0 1 kHz precision To determine the carrier frequency offset Under normal conditions the page 5 shows second IF frequency t i T 53 5 K Hz EIA uA c R 5 a As Hormal Still not sure how to read the result of this example If real frequency of the station at 89 6 MHz is exact real frequency of the station at 92 2 MHz has 0 7 kHz offset so its exact value is 91 1993 MHz 19 Radio Data System decoding To activate the RDS decoder disable Measuring first Set the Mode to RDS Page 6 shows the basic RDS information PI TP TA PS PTY CT M S RT If RT service is being broadcast the RT line contains symbols indicating begin and end of each RT tag in the text More information is provided on RDS sub page 15 When the RDS decoder is active page 5 shows block error rate ber and indicates RDS groups that are being received This gives quick survey of the RDS services present in the RDS stream The group numbers are in hexadecimal representation Detailed RDS information is accessible from page 5 or 6 under the menu item 3 More RDS Data Total 48 sub pages are provided Last 32 sub pages are reserved for group content viewer Group order viewer When you access
6. Frequency Deviation Modulation Power MPA RF Carrier RDS RBDS Bandscan Setup Timebase v Double Pilot FDS Phase Acquired 2009 08 25 12 15 06 The Double timebase effect on X axes Note to FFT module 0 dB ref to 75 kHz frequency deviation for sine modulation signal 33 RF Carrier The RF Carrier page provides an access to the RF carrier spectrum and histogram of its instantaneous frequency Frequency Deriation Modulation Power MPX RF Carrier RDS RBDS Bandscan Setup Carrier Spectrum Analyzer and Instantaneous Frequency Histogram ettings e Max hold v Mask v Histogram 100 50 50 Acquired 2009 08 23 12 57 31 Frequency separation from carrier KHz Run Stop Starts Stops the measurement Clear Clears the data and graphic window Mask Shows the spectral mask as defined by REC 54 01 E Note 0 dB ref to full level of unmodulated RF carrier Note To show the carrier spectrum the Double timebase from the MPX page must be disabled unchecked Spectrum mask based method and its limitations This method was used in past as a verification to indicate whether the frequency deviation of an FM broadcasting station exceeds the limits The method has mainly historical reason and was originally designed for analogue spectrum analyzers Implementation in the FM Scope is based on Fast Fourier Transform FFT rather than sweeping over the band thus the result may not be directly
7. comparable between these devices The mask method is a simple go no go test based on a spectrum mask which cannot replace precise measurements of the peak frequency deviation that was described on previous pages The essence of the method is to determine whether the spectrum plot in max hold mode is within the limits of the mask Record the transmitter signal over a period of minimally 10 minutes the more the better The user must ensure that no measurement results are evaluated which have been distorted by impulse interference For the same reason the measurement should be repeated twice The main disadvantage of the mask based method and especially its FFT implementation is that 1t may give positive result although the peak deviation is above 75 kHz In other words the transmission device may pass the mask based method test but this does not mean that the peak deviation is really within the limit The reason is that spectrum is always associated with energy averaged over some time This time is considerably longer than modulation peaks that may occur Single strong peak in the signal may still carry less energy than a series of weak peaks This basic fact determines that spectrum based method cannot be reliably used for finding peak deviation It is an approximation method Stations with a small number of peaks above 75 kHz can pass the mask based method Applied to reality stations that do not use strong audio compression and clipping can p
8. error or AF RDS gt 8 5 kHz time duration 1 minute Stereo encoder fault or transmitter problem or unauthorized manipulation with the broadcast equipment The device must operate in Measuring mode otherwise alarms are deactivated and the outputs are driven low The user must ensure that the device will receive the station s signal in appropriate quality To resume the monitoring on desired frequency automatically after eventual power drop out save the settings using menu item 4 To configure the alarms see the section USB and COM Port Communication Peak deviation AVE 25 kHz Time duration Time hysteresis Alarm 2 output Alarm response example Alarm 1 Alarm 2 Alarm 3 Alarm 4 Ground Application example Logical sum OR function of alarm outputs 10 Operating Instructions Power up Make sure the unit is switched off Connect the power supply and then switch the unit on The device requires no heating time After a few seconds the unit is ready for operate The antenna audio and data cables can be connected regardless of the operating state Control buttons Q a Go to next page or menu item tune up O e Go to previous page or menu item tune down Q e OK enter the menu confirm or change the option Operating modes Measuring ON RDS decoder mode The mode selected is indicated at the first line of the LCD When switching between the modes the values measured will remain T
9. key such as lt Enter gt Note 2 Some commands have their equivalent in the FM analyzer s menu a Switch off RDS groups content sending Tune to a frequency entered in kHz Example tune to 96 2 MHz 096200 F Save settings to EEPROM incl DIP switches and alarm registers Set the unit to measuring mode Set the unit to stereo decoding mode Load station data saved in EEPROM memory Example load file 3 03 L C awe gt gt Set the unit to RDS decoding mode k_ p p m R F F S E D B ly SE DIPx v X Set DIP switch d Example set tuning step to 100 KHz DIP2 1 X Set alarm register RA Example set silence detector threshold to 25 kHz ARA 25 X to 6 Switch the LCD view to page 1 to 6 Activate the LCD backlight Commands returning value Return firmware version No response version 1 3a or older 1 version 1 3b 2 version 1 3c 3 version 1 4 4 version 1 5 Return address content in ASCII format Syntax address length a Example return actual radiotext 19C 040 a Return address content in HEX format Syntax address length h Example return actual PI 032 002 h Note See annexes for commented memory map 25 DIP switches wem o a Manual LCD J3 pin 2 state P75 J2 pin 1 state P175 Optional LED bargraph pra hardware installed i DIPS between stations Note By default all DIP switches are set to 0 except for DIP2 Al
10. manual disconnect has occurred during processing of the script User writable if used in the script it must be set to 0 before communicating with the device After the communication ends the Votcpconfailed variable can be tested by if command Measurement results should be discarded if the value of 1 is detected Important The tags above are reserved and are processed preferentially This means that no variable name may start with any of these reserved tags otherwise it may yield unexpected results To avoid showing of unit place behind the tag for example Vomaxhold will show 75 0 kHz but maxhold_ will show 75 0 only 49 Note The script language is highly optimized for use with the P75 P175 FM analyzer equipment The script engine however maintains simplicity for example it does not support mathematical operations on the values measured Script file example 1 Measure a station save basic report setmode 0 tune 100 5 sleep 600 frequencydeviation acquire getpilot getrds getphase createreport c reportsi date time frequency txt Script file example 2 Measure a station save some values to a log file every minute in an infinite loop setmode 0 tune 91 9 savetext log txt frequency log file starting at date time cr repeat sleep 60 getpilot getrds appendtext log txt lt date time gt Pilot deviation pilot RDS deviation rds cr goto repeat Script file example 3 Perio
11. no graph is being refreshed by new data 100 co o 87 9 m e 89 7 z 60 m m Suo w 5 40 5 7 0 20 20 0 4 0 T T A Le 95 0 95 5 96 0 96 5 97 0 97 5 98 0 Acquired 2014 11 26 20 38 27 Frequency MHz Acquired 2014 11 26 20 38 27 Frequency MHz N 177 X 96 3000 Y 71 0000 Press the CTRL key and keep it pressed click the mouse in the graph area and pull a rectangle To unzoom the graph simply press the CTRL key and click with the mouse on the graph without moving it 40 Script files The application supports proprietary script language which massively extends the area of use and number of features User can fully automate the measurements and data storage The script files can contain only a few steps as well as large blocks of data acquisition and processing procedures Presence of that feature and its possibilities may be compared with top systems from this branch The script files extension is fms To run the script choose corresponding option in the application s menu or use command line option for example fmscope exe measure fms Each line in the script file may contain one command The command interpreter 1s not case sensitive Maximum line length 1s 1024 characters maximum script total length is 2048 lines Quick access User can quickly run the script by selecting its name in the Script submenu That script file must be saved in the application s subfolder named usr List of commands Gener
12. of the variable content given by GET POST methods 57 Socket control The socket control feature is intended only for advanced users It s a simple method how to control the application from another via TCP IP sockets This function is however primarily not intended for remote control of the equipment see section Connection instead Before attempting to use this function its parameters must be set first in Options Socket Control Enabled Enables internal Socket control server Terminal Echo If enabled all incoming characters are sent back TCP IP Port The port number on which the server listens for a client The Socket Control accepts all script commands and moreover it provides also backward channel with the aid of the command get see the list of commands Each command entered is considered as a separate script If a script file 1s being processed all commands entered by the Socket Control are placed in queue and processed afterwards The exception from this rule is command which breaks any running script How to start One of the best illustrations of use is to control the application from Windows Hyperterminal or other terminal like PuTTY Run the terminal select TCP IP connection type and fill the server address and port el FOCCOM Zadejte podrobnosti o volan m hostiteli Adresa hostitele locahot 0 islo partu 3 Pripojt pomoci TCP IP Winsock hi Stormo FM Anal
13. or other incidental or consequential damages arising out of the use of this product No part of this manual may be reproduced or transmitted in any form or by any means electronic or mechanical including photocopying recording or information storage and retrieval systems for any purpose other than the purchaser s personal use It is our intention to provide you with the best documentation possible to ensure successful use of the product If you wish to provide your comments on organization clarity subject matter and ways in which our documentation can better serve you please mail us your comments Information in this document is subject to change without notice Revision 2015 11 13 Copyright O 1999 2015 Pira cz Technical Specifications kasamaran _ po im o o 000 Boaddinesow 075 mmm Bar ines as an 120 MHz RISC DSP RS 232 DCE 9 pins bidirectional Data connector P175 RS 232 DCE 9 pins bidirectional USB FTDI based virtual serial port Communication speed 19200 bps RX buffer length Intermediate frequency IF Value 1 stop bit 8 data bits no parity no flow control 40 bytes 1 IF 10 675 MHz 2 IF 0 325 MHz 0 005 MHz 280 kHz IF bandwidth Antenna Input BNC 50 Ohms 87 5 108 0 MHz selectable 50 kHz or 100 kHz 4 uV 30 uV 70 uV 0 5 V 5 mW Antenna connector Frequency range S N 26 dB Input sensitivity basic measurements full mea
14. the Group order sub page internal group order buffer starts filling The group order buffer capacity 1s 18 groups The group order 1s showed after about 2 seconds and locked for viewing Read the group order line per line To view actual group order again go to previous or next sub page and then back Group content viewer When you access any Group content sub page the group content is showed on each error less reception of the group type desired After reception of 3 groups the process is locked for viewing To view actual group content of the desired group type again go to previous or next sub page and then back The content does not stay in memory Block D ASCII Block C ASCII Block D HEX Block C HEX Block B HEX five LSB s only Special case is group type 3a ODA AID where application group type is directly showed V Block D Application identification AID Block C Message Application group type More RDS Data summary EON PI of other networks ECC LIC RT type A B actual RT 5 7 AF list Static PS actual RT markers running toggle typel startl lengthl type2 start2 length2 Group order Group content 0a Group content Ob Group content 15b List of RDS services RDS Service e PI Program Identification yes PTY Program Type yes TP Traffic Program yes TA Traffic Announcement yes M S Music Speech yes DI Decoder Identification yes PS Program Service yes A
15. 012 06 24 20 41 14 v Frequency View Clear Acouired 2012 06 27 22 03 40 The FM Scope main screen Basic features Graphical text and MS Excel data output Proprietary script language allows fully automated monitoring and data logging Built in task scheduler mp3 recorder FTP upload MySQL and SMTP email client TCP IP remote control built in simple web server Free download no additional costs System requirements CPU 200 MHz minimum 700 MHz or better recommended Screen resolution 800x600 minimum 1280x1024 or higher recommended First steps l In case of USB connection or USB to RS 232 adapter install the USB driver first Pure RS 232 connection never requires any extra driver 2 Install the FM Scope 3 Connect the equipment 4 Runthe FM Scope 5 Select the COM port where the FM analyzer is connected and click Connect If you use USB connection you may find the COM port number in the adapter s driver setup usually in Windows Control panels 6 Make sure the FM analyzer is powered 7 Acquire a bandscan to get a list of stations or select a frequency and click Tune The frequency tuned must be indicated in the Station bar 8 Now you are ready 29 Connection to the device Connection E tion T ES serial port TCP IP server port Serial RS232 U5B Disconnect Ethernet TCP IP com mf List 127 0 0 1 23 Connection Type Select the first option if yo
16. 2F 232F 232F 232F 232F 232F 232F 232F 232F 232F 232F 1 0460 0461 0462 0467 2476 22464 22464 046 6 0461 0262 1461 0467 247r 3476 28904 7B4 6965 7254 O7 44 fof 4152 4152 EB1H 522 Ba 0006 0965 GCZA 0046 4152 2020 4352 2031 2020 661 0606 B6 dB 2826 4352 24031 GORA 228 2426 CD46 0600 6 gt gt Block B Group type TP PTY m 1888011 1888011 1888011 1888011 100011 100011 100011 100011 100011 100011 100011 100011 100011 188811 188811 00066 00001 00015 00111 16118 001500 001560 gaH 000601 Bgm g 00001 00111 16111 100606 00106 Block C Block D Z4 a a al ie CR FT 4 v e B ur na AR cut AR cut pL u u u CR 46 t 4 iu a J E b IF ARS w AZ Maximum capture buffer length is 128 kB Each RDS group consists of 8 bytes 4 blocks of 2 bytes each The file is readable in any text viewer and provides full possibility of RDS stream analysis All content is showed in hexadecimal representation and where applicable additional decimal binary or ASCII representation 1s used The file starts with older RDS groups and ends with last RDS group Note For complex real time RDS analysis please download the RDS Spy software http rdsspy com 38 FTP upload File Transfer Protocol FTP is a network protocol used to transfer data from one computer to another through a network such as the Internet Th
17. Alarm RDS minimum 001 Alarm RDS maximum 001 Alarm Signal lost time duration 001 Alarm Silence time duration 001 Alarm Overmodulation time duration 001 Alarm Pilot or RDS error time duration 001 Alarm Alarm time hysteresis 0F4 AF Histogram Important notes Lower byte is carried first higher byte is placed at Address 1 for 2 bytes variables The Address and Length values are in HEX format 1 1755 kH kH kH kH kHz 10 kHz 10 kHz 10 kHz 10 s 10 s 10 s 10 s 10 62 SetProperty and ReadProperty options Property USPTY OnlineUpdate ScanRDS AlwaysCheckRDS InvertColors HighContrast DeviationLimit Value expected or returned Integer value 0 disabled or 1 enabled Integer value 0 disabled or 1 enabled Integer value 0 disabled or 1 enabled Integer value 0 disabled or 1 enabled Integer value 0 disabled or 1 enabled Integer value 0 low or 1 high Integer value in kHz DeviationTolerance Integer value in kHz PmLimit PmTolerance Floating point value in dBr Floating point value in dBr Integer value 0 lowest speed line sec 4 highest speed 100 lines sec Integer value 0 disabled or 1 enabled Integer value 0 disabled or 1 enabled Integer value 0 disabled or 1 enabled Integer value in pixels ExecutionSpeed DebugMode LogErrors NoBreak HistogramBitmap Width HistogramBitmapHeight PmBitmap Width PmBitmapHeight MP XBitmap W
18. DS 100 110 0 70 50 If the values do not update automatically make sure that Online Update of Deviation and Signal is enabled in Options Preferences General and your browser supports JavaScript n 20 30 40 50 6 55 Hint Following paragraphs are intended for those who know writing dynamic web pages Dynamic content Real time parameters can be referred to in the website through the use of dynamic tags These tags are equivalent to the script dynamic tags and variables Also the syntax is the same When dynamic tags are placed in an HTML web page corresponding actual values are sent by the web server when the page is served out Syntactically the dynamic tags are variable names prefixed by single character The following files can include dynamic tags HTM HTML JS INC XML CSS XHTML The user website 1s composed of standard HTML files which may contain links to internal or external websites Java Scripts graphic files and more Using the dynamic tags the page can also be used to dynamically display and update measured values script variables etc For example to display the current pilot level value enter pilot anywhere on the page as in the following example lt HTML gt lt HEAD gt lt TITLE gt SAMPLE PAGE lt TITLE gt lt HEAD gt lt BODY gt lt h1 gt pilot lt h1 gt lt BODY gt lt HTML gt When serving this home page the web server replaces the pilot string in the served
19. Don t execute next commands in the script file Stop processing the script Text window output Add line to the bottom of the l T textwindow addline SW ev NUM TM textwindow addline This is a new line text window e Rewrite the last line in the text T textwindow rewriteline Sc vor eiie gee textwindow rewriteline New text at time window Add a text to th d of the last textwindow addtext line MI textwindow addtext Line now ends here Clear entire content of the text textwindow clear textwindow clear window Working with FTP SE Connect to the FTP server specified taa p in FTP Upload settings p Put the file on the server Optionally the filename on the server may differ from the local filename Disconnect from the FTP server ftodisconnect Working with HTTP ftoput date log ftoput freq jpg histogram jpg ftoput date log results log txt ftpput Access the URL specified optionally pass parameter s using GET method The accessed site s content is not stored anywhere httpget http site com log php s freq 46 Working with variables opendialog save load loadexternal Initiate a variable general type and assigns a value to the variable If no value is specified a value of 0 is assigned Any variable that is not set first has permanently a value of 1 When need the variable value a prefix must be added The variables remain in the application memory until it
20. F Alternative Frequencies yes ECC Extended Country Code yes PIN Program Item Number yes LIC Language Identification Code yes RT Radiotext yes CT Clock Time and date PTYN Program Type Name EON Enhanced Other Networks yes PI AID Application Identification yes RT Radiotext Plus yes TDC Transparent Data Channels IH In house Applications RP Radio Paging TMC Traffic Message Channel EWS Emergency Warning Systems 9a yes yes Notes 1 Does not include the group with tags that is defined in AID group 3a 2 This is the most frequent group type used for TMC An indication in the AID group 3a is decisive List of ODA applications Application name Notes This 1s not a complete ODA registration list reference Some applications are special purpose only or are used very rarely and may require special receiver The most frequent RDS setting errors Implication First PI digit can t be 0 It should RDS is not working on some be set in accordance with the receivers country where the station is located First PI digit is 0 zero Stations that carry different Car radios switch between different program entire day must be stations oneself unambiguously identified by the last two PI digits Two different stations have the same last two PI digits for example 5AFF and 51FF AF list contains more frequencies Many receivers ignore the AF list The second PI digit can t be 0 if but sec
21. FM analyzer can be supplied from any power supply which delivers a voltage between 8 and 16 V DC and continuous current of 300 mA to 1 A The FM analyzer has polarity protection and own voltage stabilizer The central conductor of the power supply connector is positive Battery power supply connector Use this connector for supplying the FM analyzer from 4x 1 2V NiMH accumulator or stabilized 5V power supply This connector is polarity protected If both power supply connectors are being used to power the FM analyzer the external connector has higher priority The unit does not charge the battery Power supply P175 External power supply connector The FM analyzer can be supplied from external power supply typically DC wall adapter which delivers a voltage between 8 and 12 V DC and continuous current of 300 to 500 mA The FM analyzer has polarity protection and own voltage stabilizer The central conductor of the power supply connector is positive Battery power supply connector Use this connector for supplying the FM analyzer from 2x or 3x 1 2V NiMH accumulator Due to safety reasons the unit does not charge the battery USB connector Use this connector for supplying the FM analyzer from PC computer or stabilized 5V power supply This connector is not polarity protected Connecting an active USB cable the unit is always turned on 1 e the power off on switch has no effect 1f the unit is powered from USB LA Never exceed
22. List of keys Pm on m E PIN o MAXHM mw c ted E 9 NN Q 2G P P E H S X U 2f FM Scope for Windows The FM Scope is a PC application primarily made for the P75 P175 automated control data visualization and data archiving The application is provided for free download on the website 10 x Ek Edt Options Window Help S aj selma aale Connection Connection Type TEC AREA Mode Script Incas Connect 4 Seal R5232 USB on El ET ECC LL n Measuring RDS Run st Mix Fr Marc Mire 77 gt 2 tog U Disconnect V Ethemet TCPAP COMI x F List 127001 23 Values Station y onMAX 5 2 S U lt gt 8750MHz gt Tune 87 90 Tune Pot ROS Deviation MAX_ SignalLevel__ Signal Qualiy Frequency Devision Modulation Power MPX RF Caner RDS RBDS Bandzesn S0kHz 1 7kHz 595kHz 62dBuV MENEE Stop Single Tmebase Double Clear ini x Corirol Acquire WM UEM AN Py N YN ALE Eb 80 109 Acquired 2012 05 27 2203 lime Change NC 44cBr AVE 5 04 05l value 5 4 dar m 2012 05 27 22 27 35 Reset zini x Control Run 0 90 100 110 120 Stop m Total samples 15519 5 E k 5 3 Total tine 01255 Settings 2 6 N x v Max hold EJ ini xi Mask S HEY Corral v Histogram g Je m i Acquire Cleas r Bet Raw Data Use HDS Spy Run Stop 0 bytes Save Aage 2
23. X curve Include Signal Quality Adds signal quality 0 to 5 curve Due to better readability the value is multiplied by two Clear Clears the Modulation power data and graphic window Instant Modulation Power Pm Shows the last one second component of the modulation power i e the modulation power averaged over one second This value is useful especially for checking and adjusting modulation processor s algorithms and settings It s available almost immediately after the station is tuned Note that this value can t be compared with modulation power limit due to short averaging period 32 MPX The MPX multiplex signal 1s the signal that goes into the modulation input of the FM transmitter It typically consists of audio L R pilot tone 19 kHz audio L R modulated on 38 kHz DSB SC method and additional components like RDS The MPX page includes MPX oscilloscope audio oscilloscope for both channels stereo balance meter MPX spectrum and pilot and RDS levels and their phase relation Average refresh rate 1s 3 times per second for the scope functions MPX oscilloscope Audio oscilloscope Stereo balance Frequency Deviation Modulation Power MPX r Carrier RDS RBDS Bandscan Setup Pilot RDS Phase o kHz 20 Acquired 2009 08 25 12 15 06 MPX FFT spectrum Run Starts the measurement Stop Stops the measurement Single Gets the data in only one process Clear Clears the data and graphic window
24. al purpose and application control Open a COM port given by number or TCP connection given by host port for communicating with the device connect 1 If TCP connection fails for any i connect localhost 23 connect reason automatic reconnection connect 127 0 0 1 23 attempts follow with 20 sec period connect If no argument is specified last connection parameters are used If a connection is already established nothing happens Close the connection disconnect If no connection is opened nothing disconnect happens send F send Send any string to serial port send B send C Set an application property to a new setproperty value Compete list of properties is readproperty TempValue InvertColors given in Annexes setproperty lnvertColors 0 your script here ae lps Read an application property and setproperty InvertColor TempValue place its value to a variable Switch the FM Scope display to the page show page window specified as page show 2 parameter 0 to 6 Show a dialogue window with user set variable showmessage defined message Useful for debug l T f oe showmessage Variable value variable lt un c O O 5 a location load location lock location unlock tune setmode getpilot getrds getquality getamod getlevel getnoise getphase frequencydeviation acquire frequencydeviation histogram frequencydeviation showbar modulationpower ru
25. arm registers P175 1 overmodutation AF MAX Hold maximum 88 Overmodulation Histogram MAX At maximum b overmodutati n AF AVE maximum 8 G gt RDSmmmm O A RDS maximum 8 r Signal st time rai n 0 Silence time duration 9 Ko overmodulaiontimedunim 06 Pilot or RDS error time duration 06 LN Reserved currently it may be used to store any value 00 Notes Alarm registers l The alarm registers value range is 00 to 99 DEC The built in alarm feature works independently from any alarms realized in the Windows control software 3 Due to characteristics of common radio signals it is not recommended to set very short time duration and very long time hysteresis 4 For user interactive setting of the alarm feature use the Windows FM Scope application Select Options Alarm Outputs in the main menu P175 Alarm Outputs Configuration x Alarm 1 Signal lost Time duration s 30 Alarm 2 Silence detector Time duration s AVE minimum kHz Alarm 3 Overmodulation Time duration s MAX Hold maximum kHz Max At maximum kHz AVE maximum kHz 60 z es 78 78 2 Alarm 4 Pilot or RDS level error Time duration s Pilot minimum Hz Pilot maximum Hz RDS minimum Hz RDS maximum Hz 60 5800 7700 o 8500 r General settings Time hysteresis s 1 To store the settings to a non vol
26. ass the mask based method although the peak frequency deviation is above the limit It must be also noted that real peak deviation measurement covers 100 of the time and suppresses interference impact while the spectrum based method doesn t Conclusions e The benefit of the mask based method is that compares real spectrum occupation caused by the station e Ifthe spectrum plot is outside the mask on any frequency the transmission device may be considered as overmodulating If the spectrum plot 1s within the mask additional peak frequency deviation measurement must be always made to verify if the station exceeds the peak deviation limit or not 34 Advanced use of the RF carrier spectrum analysis The RF carrier spectrum analysis is a very useful tool for very accurate measuring of FM deviation and modulation index and for making fast and accurate adjustments of FM transmitters on selected single modulation frequency sine tone The transmitter 1s adjusted to a precise frequency deviation with the aid of the spectrum analysis using the effect called carrier zero and selecting the appropriate modulating frequency fm and modulation index D This method requires a sine signal generator connected to the FM transmitter modulation input Modulation index is expressed as B AF fa Following table gives the lowest order modulation indexes that result in carrier zero in the spectrum AA O NEC HE NC A ee Frequency Deviation Modulat
27. atile EEPROM memory use the button in tool bar Using the Alarm output pins as general purpose outputs P175 Storing a special value to the time duration alarm registers I to L the alarm output is overridden by user defined state This special value can be either GD for logical low 0 or GH for logical high 1 This feature can be used for switching of external circuits using up to four independent logical outputs General purpose outputs can be controlled regardless of the operating mode ee ARJ GD X ARJ GH X ARK GD X ARK GH X ARL GD X ARL GH X 1 Pin 1 is located on the right It may take up to one second before the pin state is updated 3 To control the pin state from the FM Scope script use the command send for example send ARI GD X 4 To reactivate all alarms place valid numerical values 00 99 into the time duration registers Optionally store the setting to EEPROM and restart the unit Data format The format of all data returned by the device is defined as follows keyr CDE ts EC he 10 Che LS Che 10 if return value is empty key Chr 13 tChr 10 val ue Chr 13 Chr 10 Che 13 FCRE 10 otherwise 3 19200 Hyperterminal 10 x Soubor pravy Zobrazit Zawolat P enos MapowEda Frequency 96 30 MHz 0 00 25 pripojen ANSTW 119200 8 N 1 SCRL ABC 123 Zachyt v n Odezva tisku Example of the outputs when using Windows HyperTerminal Local echo is off
28. ation settings MySQL client checkfilename Connect to the MySQL mysql connect server specified in mysql connect MySQL Client settings Sends a database query using the SQL syntax mysql query CREATE TABLE table1 column1 FLOAT mysql query Does not allow to retrieve data from the mysql query INSERT INTO table1 VALUES maxhold_ database mysql disconnect Disconnect from the mysal disconnect eae MySQL server yon 44 Sending email Recipient s address es email to info radio com luis radio com Message subject email subject FM Scope Message email body email attachfile email send Script flow control execute Message body Attach the file specified To attach more files use this command repeatedly After the email is sent the attachment s queue is cleared Send the email Don t forget to configure the SMTP settings in Options submenu prior to send any emails Execute any application open any document or run another script Optional command line parameter s may be specified If no path is specified default path is appfolderi Does not wait until the application terminates email body Silence detected on frequency email attachfile C monitor histogram jpg email send execute C batch bat execute notepad exe text txt execute command c md c data sleep 2 execute usr another_script fms dies Stop executing next commands for a sleep 30 P time specifi
29. band through the antenna input Built in LCD display and control interface allows to measure and collect data in terrain without need of any PC computer Serial interface and the control software provide a possibility of remote control data viewing and automated data logging This kind of analyzer 1s essential equipment for all FM radio stations to ensure compliance with basic technical broadcast standards and to accomplish the highest audio quality possible Main highlights Stand alone design completely DSP based from IF to outputs Compliant with CEPT ERC REC 54 01 E Dual conversion receiver Built in LCD display and RS 232 interface Built in USB interface P175 Firmware updates are free Easy to use Measurements indications and outputs Overall frequency deviation incl histogram Modulation power MPX power Baseband spectrum RF carrier spectrum Pilot deviation RDS deviation Pilot to RDS phase difference FM carrier frequency offset Reception quality and signal strength Stereo balance meter Headphones audio output Alarm logic outputs P175 RDS RBDS decoder Please read this entire manual and familiarize yourself with the controls before attempting to use this equipment The equipment has been thoroughly tested and found to be in proper operating condition when shipped The manufacturer is not liable for any damages including but not limited to lost profits lost savings
30. bitmap rficopybitmap 0 rficopybitmap 0 Copy Copy the RF bitmap RF Copy the RF bitmap Ecopybitmap 000000 Itcopybitmap 000000 bandscan copybitmap em zda bandscan copybitmap i W Working with files Save a text to a file savetext overwrite savetext 9odate txt OK Save a text to a file append frequencydeviation savedata du E frequencydeviation savedata histogram txt frequencydeviation savebitmap A RA frequencydeviation savebitmap 9odate bmp Save the modulation power l modulationpower savebitmap ad modulationpower savebitmap pm bmp Save the modulation power modulationpower savedata dots modulationpower savedata pm txt RR O rds savedata rds data rdsps txt group statistics rawdatasave 0000 rawdatasave 0000 Save the raw RDS data rawdata save rds raw data txt Save actual content of the textwindow savedata A x textwindow savedata c text txt text window to a file craterepot Create and save the report createreport report Vofreq txt appendtext appendtext Y date log crPilot pilot Run the MP3 recording to the file and from the recorder run channel s specified The recorder run c rec mp3 mono channel s may be left right mono or stereo Remove invalid filename characters from second checkfilename fn 9ofreq Yordsps argument store result to the savetext C fn txt rdspi cr rdsps variable in first argument Save the applic
31. dically tune to stations of interest append some RDS information to text files each station one file setmode 1 repeat tune 91 9 call savedata tune 95 8 call savedata tune 104 2 call savedata goto repeat savedata sleep 180 rds getdata appendtext freq txt date time cr appendtext 9ofreq txt PS rdsps PTY rdspty TA rdsta crRT rdsrt cr cr return 90 Script file example 4 Tune to a station get RDS data and save them setmode 1 tune 91 9 sleep 60 rds getdata rds getstatistics rds savedata rds freq rdsps txt Script file example 5 Get the carrier offset in the Report tune 87 9 this will be the reference station sleep 3 imf setasnormal tune 107 1 sleep 3 imf get createreport C report 10710 txt tune 104 3 sleep 3 imf get createreport C report 10430 txt Script file example 6 Acquire a bandscan measure stations of interest and put all results to ftp server The FTP Upload must be set before incl local folder c fmscope data The folders must be created before bandscan acquire bandscan savebitmap c fmscope data bandscan jpg ftpconnect ftpput bandscan jpg ftpdisconnect tune 89 1 call processdata tune 91 4 call processdata tune 92 2 call processdata tune 97 5 call processdata tune 104 1 call processdata stop processdata setmode 0 sleep 60 modulationpower run sleep 900 modulationpower stop
32. e first minute elapses the value is accurate from this moment and the Pm symbol stops blinking 16 The measurement should represent typical modulation of the programme material of the broadcasting station The observation time should be at least 15 minutes or in some cases one hour may be required to be sure to measure representative programme material The value in is a linear representation of the modulation power 0 dBr 1 00 Frequency deviation histogram To provide more information the deviation is better represented by histogram rather than only displaying the highest value in over a certain period of time In this device the histogram of frequency deviation 1s processed as follows a Obtain N peak hold values samples of the deviation each taken during a measuring time of 50 ms The measuring time has influence on the distribution plot and hence must be standardised in order to ensure repeatability The 50 ms ensures that the peak values of the deviation are captured even at modulating frequencies as low as 20 Hz b Discard the samples that have been taken in presence of noise or interference c Divide the range of frequency deviation of interest 0 120 kHz into 1 kHz resolution to give relevant number of bins d For each bin count the number of samples which have a value within the bin The result is a distribution plot of the deviation frequency deviation histogram see the figure below e Add counts
33. ed distribution plot Reset Clears all values Equivalent to the Clear Data option in the FM analyzer s menu Show Bar Indicator Shows fast peak deviation bar indicator with 1 sec max hold function The update rate is approx once per 50 ms Clicking on the scale the unit can be switched between kHz and The Online update option must be enabled in the Preferences Requires firmware version 1 5 or later The frequency deviation histogram reflects the station s modulation characteristics captured over a time It does not and 1t cannot provide instantaneous values however using the histogram data the modulation 1s best described The frequency deviation histogram typically needs the station to be tuned at least a few minutes before clicking the Acquire button to provide relevant data Modulation power The application can collect the Modulation power also known as MPX power Pm data and show them as a function of time Clicking in the graph the user may track the data ox 12 43 25 12 46 12 45 1252 1254 M 240 0 554325 Y 1 0000 Time w Show m x SAdHr MIN 1 OdHr AVE 3 75 dBr Last value 5 2 dBr 2012 07 25 12 54 50 Run Starts the measurement Since Modulation Power is averaged over 60 seconds first value will be available 1 minute after tuning the station Stop Stops the measurement Time axis Assigns real time or 0 00 to the first value in the data Include Deviation MAX Adds deviation MA
34. ed in seconds p return Include another script file replacing the include command into this script file before processing the script Go to another line of the script The line is identified by a unique label followed by pit pair In the goto argument the pit pair is omitted Call subroutine The first line of the subroutine is identified by a unique label followed by pit pair In the call argument the pit pair is omitted Nesting of multiple subroutines calls is allowed Return from subroutine Continue on next command after last call include savedata fms repeat goto repeat call myproc stop myproc return Exit the FM Scope Allows for conditional execution of script fragments Only one condition is allowed per one if command If oconnected 0 showmessage Not connected stop endif Only these operators are allowed gt greater than lt lower than gt greater than or equal to lt lower than or equal to equal to numeric comparison not equal to numeric cmp equal to string cmp included in string cmp getquality if wquality gt 3 call myproc endif getfrequency if Yofreq 09630 10600 10710 return endif Operators like and or not are not permitted however nesting of multiple if commands is possible If the variable does not contain valid numeric value its numeric value is considered as 1 for the purpose of numeric comparisons
35. ent Clear the modulation power data Enable 1 or disable 0 showing of real time deviation MAX signal quality in the modulation power graph Get actual MPX and RF data Run the MPX and RF Carrier related measurement Stop the MPX and RF Carrier related measurement 42 Clear the MPX data Set normal 0 or double 1 timebase mpx clear mpx clear mpx doubletimebase mpx doubletimebase 0 rf run Equal to mpx run rf run rf stop Equal to mpx stop rf stop rf maxhold RF spectrum max hold mode rf maxhold 1 Spectral mask display rf mask 1 Select the bandscan style bandscan style Value 0 zero corresponds bandscan style 3 with the first option Enable 1 or disable 0 the bandscan grid mena bandscan grid 0 Enable 1 or disable 0 the bandscan showfrequency frequency indication above the bandscan showfrequency 1 station s peak Enable 1 or disable 0 the bandscan showpi RDS PI indication bandscan showpi 0 Enable 1 or disable 0 the bandscan showps RDS PS indication bandscan showps 1 Set actual 2nd IF frequency as a normal Allows to measure imf setasnormal imf setasnormal carrier offsets and to show this value in Report Windows clipboard frequencydeviation copybitmap R dd A frequencydeviation copybitmap Copy the modulation power modulationpower copybitmap Bitmap clipboard modulationpower copybitmap mpx copybitmap A 22 a mpx copy
36. ent In general the AM modulation of the signal is undesirable Thus whenever possible the user should choose such antenna placement and direction that maintains a low or zero AM level AM below 15 has usually no effect on the measurement oimple stereo balance meter To activate the stereo decoder disable Measuring first Set the Mode to any of the four Stereo options The simple stereo balance meter helps to maintain the same peak signal level in both right and left audio channels if stereo encoder is present in the transmission chain The best value 1s around 0 dB 1 1 No special audio signal is required to be broadcasted but it s preferable to use a sample with no stereo information 1am 18 MHz T SETS PE RL Balances The menu item 9 determines which audio channel will be present on the audio output You may choose from L R L R and L R The L R channel can help to find the best channel balance as well If monaural audio sample is being broadcasted the best balance corresponds with no audio in the L R channel A LE RA L 2d Y i NORA EY S et B Pr 3 E lm Bo Vr ORA im NEC ZA ROA REC utt SE A Rede ROSA e da a o ANON Ww a a IR Sead E RU SE TCE WESA In common operation the L R channel may be affected by distortion produced by audio processing There is also strong karaoke effect present Carrier frequency offset The unit can provide a relative carrier frequency offset from the nominal frequency
37. ervice process To adjust antenna input circuitry and trace the signal path e During measurements To find the best antenna position strongest signal resulting in the best suppression of pulse interference as recommended for peak deviation measurements The Signal value becomes zero when the input level drops below 100 uV while the maximum Signal value is reached when input level is about 2 mV Use of the 2nd IF parameter is described on following page The Noise Level is an output of the internal digital demodulation process telling how much energy is above 100 kHz in the demodulated signal It s used as a main indicator of the signal quality The user should awake to the fact that the Signal and Noise Level values are dimensionless variables Comparing these values makes no sense They do not evaluate the original signal but the reception quality in the actual place and using actual antenna and equipment Service details P175 The same information applies as above except for following e The Signal represents real signal level on the device input in dBuV unit Values 0 to 35 dBuV are estimated from the noise level thus precision 1s not defined in this range e There s an additional peak amplitude modulation indicator The AM on the received signal may occur for various reasons including but not limited to transmitter failure broadcast antenna coupler motion interference multipath propagation and other characteristics of the environm
38. he stereo decoder modes affect the audio signal in headphones output This output is one channel Hes Geren decodermode Menu To enter the menu press the OK button Some items are showed depending upon context page or operating mode Tune to a desired frequency in FM band manual tuning Tune using a scan mode automatic tuning stops on each station 3 Histogram Data Show frequency deviation histogram values 3 Set as Normal Consider the 2nd IF as a normal see Carrier frequency offset 3 More RDS Data Show more Radio Data System information 9 Sending Pm Enable Disable sending of modulation power values via serial port if measuring is enabled 9 Mode Set the operating mode if measuring is OFF RDS Stereo L R L R L R 10 Measuring Enable Disable the measuring 11 Save Data The FM analyzer can store data from up to 4 P75 or 30 P175 measurements into internal EEPROM memory This memory does not lose the data after power off Select the Save data menu item and choose unused file position or rewrite any actual position In addition actual frequency and these RDS information are saved PS PL PTY TP TA M S RT P175 EON AF DI group statistics The Save Data feature also supplies a preset memory function for tuning frequencies Load Data Select the Load data menu item and choose the file required The data are identified by the frequency To use the file as a freque
39. iable1 inc variable 1 if Yovariable1 lt 5 goto repeat endif set starttime date time showmessage Running since starttime input Enter your location name if Yoinputvalid 1 checkfilename fn inputtext bandscan savebitmap fn time jpg endif savedialog jpg if Y inputvalid 1 bandscan savebitmap inputtext endif opendialog if Yoinputvalid 1 execute inputtext endif save counter load counter 0 load counter counter loadexternal d control txt counter 0 47 Socket control Redirects the string to the socket control client If terminal echo is enabled the string 1s followed by CR LF get L lmaxdb R rmaxdb get pilot Breaks any running script The socket control related command Must be also validated by lt Enter gt Following tags may be used to create dynamic content to get system values or to Insert special characters Vooffsetnoref Carrier offset if previously got by imf get without mention the reference frequency ipmtotllini 48 RDS PS RDS RT RDS PTY RDS M S RDS TP RDS TA RDS DI RDS AF RDS EON RDS ECC RDS PTYN RDS Group statistics OA to 7A RDS Group statistics SA to 15A RDS Group statistics OB to 7B RDS Group statistics 8B to 15B RDS Settings Errors and Warnings rdsps rdsrt Vordspty rdsms rdstp rdsta rdsdi Vordsaf rdseon Vordsecc rdsptyn rdsstat 1 rdsstat2 Vordsstat3 Vordsstat4 Vordserr Re
40. icient When measuring other than only local stations or where number of stations reaches a couple of tens a single dipole or 3 element Yagi antenna will give considerably better results than simple telescopic or whip antenna In many cases this kind of antenna must allow positioning in horizontal plane in order to boost signal of stations of interest and reduce signal of all other stations Always make sure there is no pulse interference source near the antenna These sources especially include computers cars electric motors PWM regulators high voltage lines etc Assure stable antenna position during the measurement Especially the frequency deviation should not be measured in motion like in ridden car Hint Keep on mind that with fixed omni directional antenna the number of stations with excellent reception full measurement ability usually does not exceed 15 regardless of how many strong stations are on air overall in the location This is caused due to multipath propagation of many station signals as well as by the receiver s limited selectivity restricted by requirement of proper FM deviation measurement and intermodulation predisposition of the receiver s simple front end If the station of interest is 30 dB or more below the strongest stations finding the best antenna position may be necessary to reduce this ratio and to ensure full measurement ability Measurement using the transmitter s test RF output Many FM broadcast transmit
41. idth MPXBitmapHeight RFBitmap Width RFBitmapHeight BandscanBitmap Width BandscanBitmapHeight OthersBitmap Width OthersBitmapHeight Integer value in pixels Integer value in pixels Integer value in pixels Integer value in pixels Integer value in pixels Integer value in pixels Integer value in pixels Integer value in pixels Integer value in pixels Integer value in pixels Integer value in pixels DetailsInGraphs Integer value 0 disabled or 1 enabled PmBoundaryMin Integer value 12 11 PmBoundaryMax Integer value 11 12 PmXAxisLength WatermarkEnabled WatermarkText WatermarkSize WatermarkPosition Integer value 1 120 in minutes Integer value 0 disabled or 1 enabled Text string Integer value O first option 8 last option Integer value O first option 2 last option Text string can t be read by readproperty Text string TraylconHint StatusBarText FTPHost FTPUserName FTPPassword FTPRemoteDir FTPLocalDir FTPPassive SMTPServer SMTPFrom SMTPRequiresAuthentication SMTPSecureConnection SMTPUserName SMTPPassword MySQLServer MySQLDb MySQLUserName MySQLPassword Text string Text string Text string Text string Text string Integer value 0 disabled or 1 enabled Text string Text string Integer value 0 disabled or 1 enabled Integer value 0 disabled or 1 enabled Text string Text string Text string Text string Text string Text string
42. in each bin from left to right and normalise by N The result is a plot of the accumulated distribution which starts with a probability of 100 from the lowest deviation and will finish with a probability of 0 at the highest deviation The measurement should represent typical modulation of the programme material of the broadcasting station The observation time should be at least 15 minutes or in some cases one hour may be required to be sure to measure representative programme material Note Samples associated with a deviation of 121 kHz represent all values above 120 kHz Note Samples are added to the histogram only when the signal quality ensures that the values measured have a sense This extends the histogram readability in the cases the reception quality is not good enough 1106 10 MHz Temmws D4 106 10 MHz Temmmm Di ES stosran of AF UT kHz de 72 kHz 148 samples of the signal are 45 kHz peak deviation 20 of all samples are 45 kHz or more peak deviation 10 20 3l 40 50 BO FO Bl au 100 110 120 Frequency Deviation kHz Max at 72 kHz above 76 kHz 0 0 Total samples 7089 MIN 8 kHz Acquired 2008 11 08 21 54 15 Total time 0 05 54 The histogram example graphical representation 17 Service details P75 Several service values are provided on the page 5 89 68 MHz Tammwm 15 Signal o6 end IF Sed y KMS Noize Lee go The Signal value has two main reasons e In production s
43. ing a script Basic control is implemented without need of any script running The web server is not intended for public presentation of the results and does not support PHP or ASP Before attempting to use the web server it must be configured first in Options Web Server Web server NN General Setting xl Enable Internal Web Server TCP IP Port Requires restart eo Default Local Dir Leave empty for factory default page Authorizatio Require Basic Authorization Username Password Enable Internal Web Server Enables the Web server TCP IP Port The port number on which the server provides the content Default is 80 Local Dir If not empty specifies the user web root directory on your local hard disk Usually this is the folder which contains the main file index htm Authorization The authorization should be enabled if the web server can be accessed from public internet Once configured open the web browser and type the address http localhost for default port 80 or http localhost lt port gt for other ports lt a 87 90 MHz http localhost Pilot RDS Dev MAX Pm Signal AM Quality 5 7 ki 2 1 kHz 59 9 kHz e dB 60 dBu 0 NI a 1 ucc up UuwUUMp Uwe Mmmm KBA Frequency Deviation Modulation Power MPX RF Camer RDS RBDS Bandscan 100 40 20 N KA M T A MALA A LE y e VP WY AANAAT 0 L 1 0 Pilot Phase Acquired 2015 01 07 21 39 27 R
44. inverts all colors in the graphs and text windows Allow multiple instances Allows launching more application instances at one time Each application must be installed separately in a different sub folder Common settings for all Windows users Switches between common application settings for all Windows users or keeping separate settings for each user Include RDS data in Bandscan Enables PI and PS showing in bandscan Always check for actual PS and PI Enables reading actual RDS data PS and PI for the station although it is already known or was entered manually Has no effect if previous option is disabled FM Deviation Modulation Power Limit and Tolerance Broadcast limits and additional measuring tolerances that are given by authority in your country The tolerance settings have no effect on the measurement precision Preferred Mode The mode selected will be used on connect 30 Debug mode If checked the script execution will stop on errors and error message will be displayed The application will remember these settings automatically The settings are saved on application exit or can be saved manually using File Save Settings Now DIP switches The DIP switches nostalgic term represents a way how to configure some special settings of the device These settings are not directly accessible on the device but can be controlled from the PC Select Options DIP switches from the main menu To fix
45. ion Power MPX RF Carrier RDS RBDS Bandscan Setup Carrier Spectrum Analyzer and Instantaneous Frequency Histogram ettings Max hold Mask Histogram f l stop 150 100 Wu Acquired 2009 08 23 13 06 32 Frequency separation from carrier KHz Clear In the figure above a modulation frequency of 8 67 kHz and a modulation index of 8 65 third carrier null necessitate a carrier peak frequency deviation of 75 kHz Since we can accurately set the modulation frequency on a signal generator and since the modulation index is also known accurately the frequency deviation thus transmitted will be equally accurate typically better than 0 3 kHz Recommended procedure for setting up a known deviation 1 Select the required deviation AF 2 Select a modulation index p that gives a modulating frequency commensurate with the normal modulation bandwidth of the transmitter to be tested 3 Set the modulating frequency to AF B and monitor the output spectrum of the FM transmitter on the RF Carrier page Step up the amplitude of the modulating signal from zero level and stop when the carrier is at the desired order of zero Note Pilot tone and RDS must be switched off on the transmission equipment before making this measurement 35 Bandscan This is an additional feature which shows quick graphic representation of the band occupation and estimated signal strength By clicking on a station peak you
46. ire set stationindex 1 set filename Bandscan date time csv savetext Vofilename Frequency Level dBuV RDS PI RDS PS cr rpt if Yostationindex gt stationcount stop endif appendtext filename station frequency station level station rdspi station rdsps cr inc stationindex goto rpt Script file example 9 Measure stations from the bandscan save histograms if there s enough of samples bandscan acquire set stationindex 1 setmode 0 rpt if Yostationindex gt stationcount statusbartext Done stop endif statusbartext Measuring station frequency station rdsps tune station frequency sleep 120 frequencydeviation acquire if Yototalsamples lt 20 goto skip endif checkfilename filename freq Vostation rdsps frequencydeviation savebitmap 9ofilename jpg skip inc stationindex goto rpt Script file example 10 Advanced users Working with array a set of variables whose names are created dynamically using another variable set index O rpt if Yoindex gt 9 stop endif set item index ltem index content textwindow addline item index value is item index inc index goto rpt 54 Web server The software includes internal web server the content is available to the operator through a standard web browser or even mobile device The web server supports showing of special dynamic content as well as HTML forms GET POST for setting variable content and controll
47. is operation can be fully automated through the script files The FTP Upload feature needs to be set before first use In main menu choose Options FTP Upload Host namef Fort fip server com User name username Password EE Remote Dur store Local Dur C analfmn Use passive mode for transfers like a www browser To use the FTP Upload create a script file containing FTP related commands To use the FTP upload create a script file containing FTP related commands see the list of commands and the examples This feature can be also combined with Task scheduler to create fully automated online system of monitoring with www based output SMTP Email client The application includes simple SMTP client that allows sending emails to one or more recipients with optional file s attached The email client is controlled via script Setting up the SMTP parameters is necessary before use In main menu choose Options SMTP Settings SMTP Settings Bu X Outgoing SMTP server port Fra smtp amail com Authenticatio Requires authentication Secure connection TLS Username Password SE To use the email feature create a script File containing email related commands Information about how to set up the SMTP parameters is available from your mail account support or internet connection provider ISP The From field must also be specified it is usually the email address associated with your e
48. it button To tune the station select 1t in the Station toolbar and click on Tune To show complete station list data click on the Text output button in Bandscan window Text window The Text window primarily provides one of the text output possibilities for automation scripts The Text window also serves as a console 1 e it allows entering script commands in the bottom line For example if you type exit confirmed by lt Enter gt the application terminates If you type time the window shows content of the variable named time actual time To use the console there must be no other script running The script language 1s described later in this manual 37 Radio Data System Radio Broadcast Data System Frequency Deviation Modulation Power FFT Radio Data System I Radio Broadcast Data System CR 1 2322F 3 Info 24 11 2008 90 9 102 6 MHz www rozhlazs cz radiozurnal informace o vyellani poradech i 34 2 Group statistics 34 5 25 43 RD5 RBD5 Bandscan Setup Acquire 17096 bytes GAYE view Clear Acquire Acquires the RDS data To see actual data the Mode must be set to RDS In addition error or warning messages are included in the report if any problem is found in the RDS settings Get Raw Data Captures raw RDS data in real time and allows saving them to a text file in following format Block D Block C Block B Block A E PI 232F 232F 232F 232F 23
49. mage to the LCD module Mainboard composition P175 Antenna input LCD 00000 Alarm USB outputs J1 Alarm outputs General purpose outputs 1 5 V output for powering external device max 100 mA 2 Alarm 1 Signal lost 3 Alarm 2 Silence 4 Alarm 3 Overmodulation 5 Alarm 4 Pilot or RDS level error 6 Ground J2 Reserved for special applications 1 DIPS output for remote switching 2 Reserved 3 Ground Notes L Jil Off On J10 e e e mj e e IODE Up e e IL B Down e e IL ok 50 0M e 0909 R10 Headphones Audio audio output level J7 Battery power supply connector J10 External buttons pull up resistors on board 1 Ground 2 Up 3 Down 4 OK J11 Serial RS 232 port TTL levels 1 Receive Data RxD 2 Transmit Data TxD 3 Ground The Alarm outputs can be used as independent general purpose logical outputs See the section List of commands and configuration registers for more details Maximum current from to pins 2 5 is limited by internal 390R serial resistors Note The device provides three serial communication ports USB RS 232 and J11 These ports are internally linked together so the user may select any of these ports that best fits the communication requirements When requesting data via any port all ports will send the reply The user must ensure that different ports will not receive re
50. mail account If your ISP blocks default SMTP port 25 use port 587 instead for example smtp gmail com 587 MP3 recorder The MP3 Recorder feature needs to be set before first use In main menu choose Options MP3 Recorder MP3 Recorder MP3 Recorder Setting Samplerate Quality 441 DC Hz High quality Bitrate for mono recording 64 kbps Copyright CRC Bitrate for stereo recording Original 128 kbps Private To use the MP3 Recorder connect audio source to the default soundcard input Create a script file containing Recorder related commands To use the MP3 recorder connect the audio source to the default soundcard input using any metalic audio cable Create a script file containing MP3 recorder related commands see the list of commands in section Script Files List of commands Working with files This feature can be also combined with Task scheduler to create fully automated system of recording Make sure the file lame enc dll is placed in the application folder This file is a part of the installation package or may be downloaded from the net Important Recording audio content may violate copyright laws Zoom option Any graph window can be maximized over the entire workspace Above that you can zoom in on your graph with the zoom function or in other words enlarge a certain part of the graph The zoom option uses mouse and can be applied to all graphs in the application if
51. may directly tune the station The strongest stations are copied into actual station list and showed in the Station bar allowing quick tuning Due to physical characteristics of the device this feature is not intended for coverage analysis nor reference signal strength measurement The bandscan effectively shows a visualized list of stations detected rather than showing a simple print of amplitude spectrum The station s detection ability is among others affected by the RF signal bandwidth which is fixed at 280 kHz as required for proper measurement of modulation characteristics Bandscan IE xi J a 3943 YYSOCIMA qi 867 BBC 974 F1 974 997 FAJN 1071 CR2 67 Region 839 7 CR1 90 7 CR1 354 CRS 106 0 2203 Signal dB a 1027 CR3 M 55 59 30 JE g7 aa ga 100 Acquired 2012 07 18 20 49 18 Frequency MHz gt x 40 30 a Sho Mat For reference measurement e Frequency 1 i Fl Jw PS Acquire Acquires the Bandscan The scanning is indicated in the application bottom line Stop Aborts the operation Text Result Copies the station list in the Text window Style Selects from various displaying styles If RDS data is enabled for bandscan in Preferences the bandscan may show PI and PS for each station However it may take a few minutes before the bandscan finishes due to additional time required for getting RDS data Note P75 0 dB ref to approx 0 5 uV on the antenna input Ma
52. n modulationpower stop modulationpower clear modulationpower realtime modulationpower includedeviation modulationpower includesignal mpx single mpx run mpx stop 41 Select and load the location station list by its name If no location of that name is found it is created automatically location load MyLocation 1 Lock current location merge mode for bandscans location lock location unlock tune 89 6 setmode 0 getpilot getquality getlevel textwindow addline Level is level getphase Unlock current location Tune to a frequency specified in MHz Set the operating mode to Measuring 0 or RDS 1 Get pilot deviation value Get RDS deviation value Get signal quality value Get current AM value in P175 Get current signal level P175 Get current noise Get pilot to RDS phase difference value Acquire actual frequency deviation data incl histogram frequencydeviation acquire Switch the display between histogram 1 and accumulated distribution plot 0 Enable 1 or disable 0 showing of the instantaneous frequency deviation bar frequencydeviation histogram 1 frequencydeviation showbar 0 modulationpower run modulationpower stop modulationpower clear modulationpower realtime 1 modulationpower includedeviation 1 modulationpower includesignal 1 Run the modulation power measurement Stop the modulation power measurem
53. n nha i non nn a ii i nn nn nn nro non nn non nn nn nnne 23 FNES cope COMEDIT EP TT T m 28 A Rem 28 OETITCYU NORD a A RE na Eo coo coo eee ca 28 TU ED OPZZ CZ CZE OZ NZ CZ PEC CP 28 ConnecHon to the AENEON alisar bcn kate iaa 29 MEI SB Me BC ARRE CM A e o E E W A PO E 29 E AAA WZ Az O ii nod 30 o PE O O PONE PE O E AE O 30 Frequency deviation histogram and accumulated distribution plot esses nnns 31 DYNO GUN TATION ON jeee Z coto Doct 31 A d J M 32 AEE E T n 33 Dad E T a EAEE mi oO OE R a da mmm 35 ron IS RR NOR N E E perm vn N E E A E OE E E PUS 36 TVO a E E EE E ORA E A EE SS 36 Radio Data System Radio Broadcast Data System ricerca 37 LAA n E A In E EEE 38 SAA Toms 38 MP CO a EE MUTET 39 Z2 GOIH ODIO os EEE O E MEM E E E EEE E EE EE 39 e ERA A A E a 40 PP O o o e OO CA 54 A O E O ER PEOR An A 57 Task schedule adna EE o y e taida 58 io PZ EC EC EE CEC EEEE CEC 58 ETICO PAP wa a o 59 A 59 Superhelcrodyne receiver SASINO rd us 59 NIIS TNT O CE W A 60 A MEE ME MM MM MEE MU IUE MEM 60 Bell topen Aag bRESHPEIGBEED OPONE mae ta RCA O Dd RI RM M A EA 62 Introduction The P75 and P175 FM Broadcast Analyzer is a stand alone low cost solution for FM broadcast analysis It provides complete FM modulation and basic AF spectrum measurements in FM radio
54. ncy preset e Make sure the device operates in Measuring or RDS mode e Load the file To use the file for the purpose of reading all stored data e Make sure the device is set to Stereo decoding mode e Load the file e You may browse the data send them via serial port or continue in measurement by enabling the Measuring option in menu Headphones output volume 36 ZE PH Tama m ino TE a The menu item 9 allows adjusting of audio volume in steps Fine adjust or max level adjust is made using the on board control Note The headphones output is not suitable for rebroadcast or streaming purposes Low battery indication When the accumulator voltage drops below 4 7 V P75 or 2 3 V P175 or when the external power supply voltage drops below 6 9 V the BATT indicator is showed The device will not stop the operation by force it allows the user to continue in their work It s on the user s responsibility to finish the measurement and switch the unit off as soon as possible Disregard for the low battery indicator may result in data loss and accumulator damage 12 Measurements Signal quality S392 Z d Sahl s Sil The signal quality indication does not reflect the signal strength directly It s a result of the following input parameters and influences Noise level measured in baseband above 100 kHz Multipath propagation Intermodulation Amplitude ripple AM modulation 2 IF freq
55. ond PI digit is 0 for and listener must tune manually to the station has more transmitters example 603B the strongest frequency listed in AF Car radios search for another frequency using PI seek this takes up to one minute of course without any result The station uses only one transmitter but second PI digit is not 0 for example FFFF The second PI digit must be 0 if the station has only one transmitter local station 23 USB and COM Port Communication Connecting the FM analyzer to a PC For configuration and control requirements a PC is connected to the FM analyzer via standard RS 232 interface provided by D SUB9 female connector DCE on the FM analyzer side On the PC side locate an unused COM port If the free port exists in a form of 25 pin connector use a standard D SUB9 male to D SUB25 female adapter It s preferable to use standard modem serial cable with one male and one female connector Any USB to RS 232 adapter can be also used The P175 version allows direct USB connection Using appropriate drivers the device will appear as a new COM port in the system so the method of software access 1s the same for both the RS 232 or USB connections FM analyzer 2 TxD 2 RxD Configure the communication parameters as follows Duas E Carrier detection DB9 male DB9 female List of commands and configuration registers Note 1 There is no need to validate the commands by any additional character or
56. oot Reboots the PC shutdown Shutdowns the PC send Sends any RDS command for example SEND 096200 F Tips e Set read only attribute for fmscope ini to avoid unwanted configuration changes The fmscope ini file as well as the script variable content file is usually placed in local settings folder for example C Documents and Settings user Local Settings Application Data FM Scope e Any reports are welcome Please send your suggestions or bug reports It will help to create new improved version of this application e Visit the forum at http pira cz forum 59 Service Part Firmware update The FM analyzer has a firmware update capability This allows easily implementing of new features When a new firmware version is released a special simple Windows application provides the firmware update The firmware updates are provided at no additional costs Connect the FM analyzer to any local COM port or USB port P175 Run the update utility select the COM port and click Start button Turn on the FM analyzer if not done yet The upgrade process is fully automated and takes about I minute lad aD m Please refer to the web site for more information Don t forget to download also actual control software and manual with the new firmware Keep all parts the same version Superheterodyne receiver ganging This operation should make a qualified person only Under normal conditions there is no need to proceed this ope
57. page with the current value of that parameter Note The web server cannot show any measured value which has not been previously received from the device When serving the content the web server typically does not update the values from the device but uses the latest values known Reserved addresses Following addresses provide special content getvar lt variablename gt Returns the content of the specified variable http localhost getvar time dynamic tag in plain text format getstr lt string gt Returns the string in plain text format with all http localhost getstr dynamic tags replaced by actual content The string The time is 25time must be URL encoded and datetis 25date getimg lt imagename gt Returns the graph image specified in jpeg format lt img src getimg mpx gt The image name can be one of the following frequencydeviation modulationpower mpx rf bandscan getimg lt imagename gt The same as previous but you specify also the image img src getimg mpx lt resolution gt resolution in pixels width x height without spaces 640x480 gt 96 Reserved variables There s a reserved variable named webaction which is used to perform basic control of the device Once the website returns this variable via either GET or POST method following operation will be performed depending on the variable content variable content P Modulation Power Run Modulation Power Stop
58. quests at the same time Note for boxed version There are no user adjustable elements inside Don t remove the front panel Alarm outputs P175 The device provides four independent logic outputs that are set by specific alarm conditions These outputs can be used for direct LED driving switching to backup transmission equipment signalizing via GSM gateway etc The alarm outputs are active high If the alarm condition is no longer actual appropriate output is driven low when the time hysteresis elapses Almost all parameters are user configurable With factory default values the alarm behavior is as showed in this table Alarm output Interpretation Alarm 1 Signal quality lt 4 FM transmitter failure or signal for the P175 device Signal lost time duration 30 seconds 1s too weak for permanent monitoring There s no audio or the audio level is too low Broadcast automation system has crashed or studio s mixing console has been set improperly or connection between studio and transmitter has been lost Alarm 2 AF AVE lt 25 kHz Silence time duration 1 minute AF MAX Hold gt 88 kHz and Transmitter problem or sound processing problem Alarm 3 Histogram Max At gt 78 kHz or unauthorized manipulation with the broadcast Overmodulation or equipment or signal too bad alarm 1 interpretation AF AVE gt 78 kHz may apply time duration 1 minute AF Pilot lt 5 8 kHz or Alarm 4 AF Pilot gt 7 7 kHz Pilot or RDS level
59. ration The device comes optimally adjusted from factory User should not touch the coils L1 Antenna coil L2 Oscillator coil V1 Ut Tuning voltage Tune the unit to 108 0 MHz Adjust the tuning voltage to 4 0 V by oscillator coil The tuning voltage tolerance at 108 0 MHz is 0 1 V 3 With the antenna connected tune any station in range 89 0 92 0 MHz and adjust antenna coil to the best strongest signal NO ma 60 Annexes Memory map Address 01A 020 024 026 028 02 NW Ae 02E 5 3 034 03C NO 03E A R gt 082 088 O8E 144 46 19C D E E IEA IEE IEF 1FO IFI 1F2 1F3 1F4 IF5 1F8 1F9 IFA IFB IF IFD m I o ON i RDS status bits bit 10 CT indicator bit 9 RT indicator bit 8 RT Type A B bit 7 AF indicator bit 6 TP bit 5 TA bit 4 MS bits 3 to 0 DI RDS group counters 0a Ob 1a 1b 15b 0 0 02 002 002 002 002 02 002 002 002 002 008 001 N RDS AF list RDS EON PI up to 4 020 01A 008 002 040 008 001 001 003 001 RDS Rem gn OOO 001 RDS RT item 2 start RDS RT item 2 length RDS PIN day 001 001 001 001 001 RDS LIC RDS ECC RDS CT local time offset Unit kHz 10 Hz 10 Hz 10 deg z 10 z 10 1 100 Hz 10 H H channel No Hz 10 Hz 10 half of hour 001 Alarm Pilot minimum 001 Alarm Pilot maximum 001
60. rsion of RDS The two standards are nearly identical with only slight differences Both use a 57 kHz subcarrier to carry data 186 16 MHz Tawmmmm L5 wik Pilot i kriz The deviation range of the FM carrier caused by RDS RBDS is from 1 0 kHz to 7 5 kHz The most used value is around 3 0 kHz This value should be considered as a minimum 1f dynamic PS or TMC is used 15 Pilot to RDS phase difference The 57 kHz for RDS subcarrier was chosen for being the third harmonic of the pilot tone for FM stereo so it would not cause interference or intermodulation with 1t The amount by which RDS subcarrier and third harmonic of pilot tone are out of step with each other can be expressed in degrees from 0 to 360 Since the RDS signal is based on its carrier phase alternating the full angle reduces to straight angle and we can equate 90 degrees 90 degrees 106 104 MHz Teannas 05 A Pilot 6 kHz E E kHz deg During stereo broadcasts the RDS subcarrier will be locked either in phase 0 degrees or in quadrature 90 or 90 degrees to the third harmonic of the pilot tone The tolerance on this phase angle is 10 degrees A value out of the specification is however not to be considered as a critical failure 1 e there s no need to solve that situation promptly If no value is given the RDS and pilot are not in stable phase relation In that case check if pilot or MPX signal is connected to the RDS encoder input and external synchroni
61. s exit or applying reset command If there s a number stored in the variable increase the variable by specified value This value may be negative or floating point as well If no value is specified the variable is increased by 1 Permit the user to enter a text or number If any text is entered a variable inputvalid is set to 1 and variable inputtext contains the text Show standard save file dialogue box Optional filter may be specified If a file name is confirmed a variable inputvalid is set to 1 and variable inputtext contains the file name incl path Show standard open file dialogue box Optional filter may be specified If a file name is confirmed a variable inputvalid is set to 1 and variable inputtext contains the file name incl path Save content of specified variable to disk Variable saved this way is available to all scripts using command load Load content of specified variable from disk If no variable of that name has been saved before a default value behind the comma is assigned Like the load command but loads the content of variable from external file specified The external file format is as follows Global variablel valuel variable2 value2 etc Remove all variables from RAM It is preferred to call this command on the beginning of your script whenever you don t need to keep variables created by previous scripts set variable set msg Counting repeat showmessage msg var
62. specified voltage value at this connector lt may cause permanent damage to the device The USB port must be rated to full 500 mA current When supplying the unit with USB bus it is a better choice to connect the unit to the USB interface on the main board Supplies for pocket USB hubs and for some USB interfaces of lap top and desk top computers are not sufficient and an external power supply is necessary Mainboard composition P75 YD e Antenna 13 14 input Off On es exa eg i aj dj 1 N az dd i oo S a ar El 1 E s D E AE ati ra gu aa TT Down Veg OK CIE ZSS Adio Audio RS 232 output level J1 LCD display connector HD44780 standard J4 Reserved 1 MPX audio PWM output no LPF J2 Expansion IIC bus 2 Receive Data RxD TTL l 5 V 3 Transmit Data TxD TTL 2 SDA 3 SCL J5 Battery power supply connector 4 Ground J6 Audio connector mono stereo switch J3 Reserved for user applications 1 2 mono jack 1 Ground 2 3 stereo jack headphones 2 DIPS output for remote switching Note the audio output is still one channel 3 Reserved 4 Ground 5 5 V LCD module connection if flat cable is used PIRA75 Mainboard IE u Mu Su u u u u u m u Su Zr u u rtr LCD Module Make sure the LCD module is connected right before connecting power supply Incorrect connection will cause permanent da
63. surements Maximum input level Intermodulation immunity basic single input LC circuit with coil tap LA Never connect RF power output from the transmitter directly to the device s antenna input 01 Measurements 0 121 kHz lt 1 5 kHz lt 2 kHz 12 14 dBr 0 2 dBr 0 2 kHz 1 0 17 9 kHz note 5 5 0 5 kHz 4 deg 0 3 dB 0 5 dB non linearity 3 dBuV offset 2 dBuV Frequency deviation range min 1 kHz sine Frequency deviation error typical content Pilot to RDS phase difference error 35 86 dBLV 0 35 dBuV Signal level error P175 I ON ON a w MH not specified Alarm Outputs P175 Maximum current from pin 1 100 mA Maximum current from to pin 2 3 4 5 15 mA internally limited by 390R serial resistor Headphones Audio Output Audio channels I switchable R L L R R L 100 Ohms adjustable 0 2 5 V p p 75 kHz 55 dB gt 23 dB 2 Output impedance Z d no load 75 kHz volume 0 dB kHz kHz Output level Signal to noise ratio Stereo decoder separation Distortion All RDS groups 0A 15A 0B 15B PS PL PTY PTYN TP TA M S DL AF EON Internal RDS RBDS Decoder RDS groups detected RDS services supported RDS groups decoded OA OB 1A 2A 2B 3A 4A 10A 14A RDS deviation AF 4 required min 1 0 kHz AF ys 2 0 kHz 30 uV average BER 5 or less AF 4 73 4 kHz 18 uV single station no interference Never e
64. ters are equipped with a test RF output This output is primarily not intended for modulation characteristics measurement using an analyzer based on a receiver as the P75 P175 device is In most cases it can be used for this purpose but this usually does not bring any advantage Special care is required before connecting the analyzer to this output Make sure the output signal power does not exceed 5 mW 7 dBm In some cases the test RF output gives 30 dBm 1 W or more This signal must be attenuated to less than 5 mW before connecting to the analyzer In our opinion it is better not to use the test output and get the signal from air The modulation characteristics are not affected in near field Another recommended way is to connect only the transmitter s and analyzer s ground shielding On the transmitter sites where many transmitters are operating the user may be forced to find one of the methods mentioned that gives full quality result It s due to intermodulations caused by many strong signals and their harmonics that are present in this environment 14 Overall frequency deviation peak frequency deviation Frequency deviation AF is used in FM radio to describe the maximum peak instantaneous difference between an FM modulated carrier frequency and the nominal carrier frequency The overall peak frequency deviation shall not exceed 75 kHz The peak hold values of the deviation are taken during a measuring time of 50 ms
65. the changes do not forget to save them into EEPROM button Ge xi O LED backligh 1 Manual LCD backligh O Auto amp O Always off C 1 Manual 1 Always on 3 Scan sensitivit C O Low 1 High Currently it s possible to configure LCD backlight tuning step scan sensitivity and noise cancellation between stations squelch and scan mute Other options if present should be disabled Tool bar j Save data from actual window usually in csv text format readable by MS Excel etc Save bitmap image of actual window Copy bitmap image from actual window to Windows clipboard Show Preferences dialogue box Show Task Scheduler Station lists Cascade windows Tile windows horizontally Tile windows vertically Lock all windows protect from unwanted resizing or movement Acquire all data from the device Save complete text report Store actual device settings to its internal EEPROM memory Se DAO gd 260540 31 Frequency deviation histogram and accumulated distribution plot Frequency Deviation Histogram Mu dob MQ Change Styl _ Reset Bar indicato 3 4 50 B FO GD 30 100 110 120 Y Sh Frequency Deviatian KHz ud 2 Max at 38 kHz above 77 kHz 0 0 Total samples 20235 MIN amp kHz Acquired 2014 11 15 18 32 04 Total time 0 16 51 Acquire Acquires the Frequency deviation data from the FM analyzer Change Switches the display between histogram and accumulat
66. turns 1 if communication port is opened or TCP connection is alive otherwise returns 0 Inserts 9o sign without processing subsequent expression as variable connected Vopercent location Current location name stationcount Total number of stations detected in bandscan Points to station of interest from all stations detected in bandscan Can be 1 to stationcount stationindex Frequency of the station pointed by the ostationindex long format 87 5 MHz Frequency of the station pointed by the 9ostationindex compact format 08750 suitable for use in file names wstation frequency wstation freq station level Reception level of the station pointed by the ostationindex p p y Reception noise of the station pointed by the ostationindex RDS PI of the station pointed by the stationindex RDS PS or description of the station pointed by the 9ostationindex wstation noise station rdspi station rdsps station userdata Optional user data of the station pointed by the stationindex winputtext The text entered using input query or dialogue box Contains 1 if any text was entered using the input query or dialogue box otherwise contains 0 Voinputvalid wtempfolder A Windows folder where temporary files may be placed appfolder FM Scope application folder without trailing delimiter V lasterror Contains a text of the last script execution error User writable tcpconfailed Returns I ifa TCP connection issue or
67. u use RS 232 or USB connection Serial RS232 USB Serial Port The COM port to which the FM analyzer is connected Ethernet TCP IP TCP IP Server Host name or IP address of the remote site where the FM analyzer is connected TCP IP Port Use the same port as on the remote site Any commercially available Ethernet to RS232 adapter can be used on the remote site Suitable software based Ethernet to RS232 converter is available for example at http pira cz eng piracom htm run this converter on the remote site PC Connect Opens the connection Disconnect Closes the connection Preferences Preferences IN X General 5 Scripte f P75 Related ie P175 Related Settings Enable 50 kHz tuning step requires restart US PTY Coding w Online update of deviation and signal v Include ADS data in Bandscan v Invert colors Include station details in graphs Preferred Mode Measuring FM Deviation Limit and Tolerance Modulation Power Limit and Tolerance poder mE 2 cer Enable 50 kHz tuning step Check only if there are stations in your area broadcasting in 0 05 MHz raster US PTY Code Check if your location belongs to US broadcasting area Online Update of Deviation and Signal If checked the deviation and signal values are updated continuously Typically this option must be enabled in order to see actual values Invert Colors Enables night mode
68. uency frequency offset in channel check The essential condition for the measurement is enough signal level on the antenna input and sufficient frequency spacing between the stations Not all signals that you can listen can be also measured The following scale illustrates it and it s valid generally Signal level 10 uV 100 uV 1000 nV Reception on a reene Poor quality stereo High quality stereo PN UPENEJE Not possible Basic Full ability The basic measurement includes modulation power pilot level and RDS decoding The full measurement includes overall frequency deviation and RDS level In noisy environment or in a location with many strong stations the minimum signal level may Increase It s possible to say that optimal signal strength range and reception conditions for full measurement coincide with the requirements placed on high quality stereo reception This rule determines the demands closely Signal reception quality table fon p Weak noisy signal detected m si na unusable for measurement Poor signal Basic measurement is possible with reduced precision for RDS level Full measurement is not possible Good signal Full measurement is possible with partially reduced precision nnnm Excellent signal Note For proper measurement of modulation characteristics internal bandwidth for RF signal is fixed at 280 kHz In locations where stations are present in 200 kHz or even 100 kHz spacing the de
69. vice may indicate insufficient signal quality unless signal of the adjacent stations is rejected enough by positioning of the receiving antenna 13 Following tables illustrate approximate max measuring distance as a result of transmitter s ERP power and measuring conditions Estate housing telescopical antenna Open space hill Yagi antenna OKW 100 kW Baseband noise spectrum from the area around 100 kHz is mirrored to audio spectrum in the audio output This results in audible noise expansion and helps to find the best antenna position if the input signal is weak Selecting an antenna There is no generally valid choice for the antenna The requirements for the antenna differ with local conditions and kind of use The essential condition for the measurement is enough signal level of the desired station on the antenna input Not all signals that you can listen on any radio receiver can be also measured It s possible to say that optimal signal strength range for full measurement coincides with the range which is required for high quality stereo reception From this observation it s clear that simple telescopic or whip antennas are not enough for some applications On the other hand special calibrated antennas for EMI and RF field applications have no reason for FM modulation measurements In the transmitter s near field up to 1 km distance from the transmitter any piece of wire connected to the antenna input should be always suff
70. x dynamic range is lt 80 dB The signal value on the Y axis is estimated from the Signal and Noise Level values from LCD page 5 Precision is not specified for this function Note The bandscan supports 100 kHz tuning step only 36 Station lists The idea of Station lists 1s to store and switch between different bandscans and station presets This 1s especially useful if one makes monitoring in different locations as it can quickly tune the stations of interest A separate station list can also be a source for some automation scripts without affecting station presets dedicated for manual control je To access the Station lists click on the button Station Lists E xj Your current location ig Location 1 Edit Delete Lock Unlock gt m here New Create new location station list Up to 15 locations can be created Edit Edit the location Allows to edit add and delete stations from the list Delete Delete the location selected Lock Unlock Affects how the Bandscan feature processes current list Stations from locked list are merged with stations from new bandscan Stations from unlocked list may disappear if they are not recognized in new bandscan However stations that were entered or edited manually will never disappear from the list regardless of the lock unlock state gt Pm here Load the location selected To fill the list with station presets take a bandscan or click on the Ed
71. xceed specified voltage value at the battery power supply connector lt may cause permanent damage to the device Disconnect or remove accumulators from the unit when it is not in use ECC LIC PIN RT CT AID RT Antenna input sensitivity Don t open the plastic cover boxed versions No user adjustable parts inside Risk of damage Take care to avoid strong mechanical pressure on the power switch during transport Never use the equipment if there s any visible damage on its electrical parts In that case disconnect all cables remove accumulators and contact the vendor or manufacturer Notes Technical specifications l p p peak to peak value BER Block Error Rate Due to inherent reception the unit may have reduced sensitivity at 90 0 MHz 3 Very strong el field intensity above 130 dBuV m may cause additional measuring error or may disallow the measurement 4 Shadowed fields are device specific 5 Ifpilot and RDS are not synchronized the range reduces to 1 7 17 9 kHz Spurious RDS detection may occur on stations without RDS if the station s signal is noisy or specific static sine tones are transmitted If ARI system is used simultaneously with RDS on the same transmitter the RDS deviation value should not be taken into consideration Instead of this the Windows application and MPX spectrum graph gives an image about signal level of each component Power supply P75 External power supply connector The
72. yzer Tool Eei xj File Edit Options Help Frequency Mode Acquire All 94 30 MHz lt gt 94 30 MHz Tune Measuring RDS DT xa soccon Hyperterminal Soubor pravy Zobrazit Zavolat P enos N pov da tune 94 3 mpx run get L lmaxdb R rmaxdb L 8 2 R 0 3 mpx stop getpilot getrds get pilot 0 03 14 p ipojen ANSTW TCP IP SCRL ABC 123 Zachyt v n Odezva tisky 58 Task scheduler Built in task scheduler allows to schedule script files fms execution and any other application execution or document opening You may also use it to restart shutdown the PC to send any string to the connection or to exit the application To open the task scheduler select Options Task Scheduler in the main menu FM Analyzer Tool 5 File REF SETU MIH X Fre Task Schedule e Enabled Pili pen Execute Fre Fr Times a X Item Number z OK i X Cancel P 3 Delete Daye in week Monday Tuesday Wednesday Thursda La Saturday Sunday e Close Enabled Enables the Task Scheduler Times Allows you to specify days in week and times in the day when the task will be executed Delete Removes the selected task Find File Easy way how to find a file application to be executed This may be a script file or any other file These keywords are also accepted in the task line exit Exits the FM Scope application reb
73. zation is enabled Follow the instructions supplied with your transmission equipment Set the phase difference when the transmission equipment works under common conditions and after enough time of warm up The phase difference depends a little on the transmission equipment temperature and other physical quantities Modulation power MPX power Pm The modulation power is a relative power of the MPX signal averaged over 60 seconds according to the formula modulation power 10 log 2 60 s KAf t 19 kHz dt dBr O dBr corresponds to an average power of a signal equivalent to the power of a sinusoidal tone which causes a peak deviation of 19 kHz Intensive audio dynamics compression as well as increasing overall peak deviation causes the modulation power to rise The modulation power limit if defined in your country is usually 0 dBr or 3 dBr Please refer to your local communications authority for more information Since the modulation power is averaged over last 60 seconds first value can appear after one minute from power up or tuning to a new frequency However the analyzer reduces this time using estimation method during first minute so it shows an estimated value of the modulation power almost immediately saving considerably the operator s time but still keeping compliance with standards This is indicated by the Pm symbol blinking Relevancy and accuracy of the modulation power value increases with each second After th

User Manual

Contents

Download Pdf Manuals

Related Search

Related Contents