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RF Central RFX-RMR Operator'S Manual Download Page 17

 

RFX-RMR 

Issue 1.0 

page 17 of 

41

 

 

7.1 1

st

 Down-converter 

 
The first down-converter is mounted as shown in the photograph in section 4 
 
The RF signal enters the receiver unit via a standard ‘N type’ connector on the rear of the unit. The 
unit contains a local oscillator, which tunes according to an offset appropriate to the receiver operating 
frequency and is controlled by the front panel push button display system. The output frequency of the 
first down-converter is 630MHz. 
 
 

RF input

RMR RX

1

st

 Down-converter

Front panel display

RF frequency control

VCO/PLL

LNA

LO

Mixer

BP filter

630MHz to 2

nd

 

Down-conv input

 
 
 

Summary of Contents for RFX-RMR

Page 1: ...RFX RMR Issue 1 0 page 1 of 41 RACK MOUNT RECEIVER RFX RMR OPERATORS MANUAL Copyright 2005 RF Central ...

Page 2: ...RIPTIONS 16 Module locations 16 7 1 1st Down converter 17 7 2 3 in 1 Multi Down converter 18 7 3 COFDM demodulator MPEG decoder Board 19 7 4 ANALOG DEMODULATOR TECHNICAL DESCRIPTION 20 8 INTRODUCTION 21 8 1 R F input circuit operation 21 8 2 Base band video processing 21 8 3 A1 and A2 audio demodulators 21 8 4 Analog demodulator Power supplies and monitoring 22 8 5 Front Panel Controller Display B...

Page 3: ... 7 5 Aux supply 31 9 7 6 Relay 1 and Relay 2 31 9 7 7 LCD Timeout 31 9 7 8 Prog Channels 31 10 PREPARING FOR OPERATION 37 10 1 The RFX RMR Receiver 37 10 1 1 Antennas 37 10 1 2 Checks 37 10 2 The Transmitting Equipment 38 10 3 Transmitter Receiver tests 38 11 SYSTEM REMOTE MONITORING AND SETUP 39 12 APPENDIX A MPEG ENCODER PARAMETER SETS 40 13 APPENDIX B TABLE OF DVB T NON HIERARCHICAL BIT RATES 4...

Page 4: ...ecommended to return any equipment that requires RF servicing to RF Central WARNING GaAs BeO Hazard Certain components inside the equipment contain Gallium Arsenide and Beryllium Oxide that are toxic substances Whilst safe to handle under normal circumstances individual components must not be cut broken apart incinerated or chemically processed In the case of Beryllium Oxide a white ceramic materi...

Page 5: ...time re issued with revised guidelines For RF Central use a maximum power density limit of 1w m is to be applied when calculating minimum safe working distances Important Note It must be remembered that any transmitting equipment radiating power at frequencies of 100 kHz and higher has the potential to produce thermal and athermal effects upon the human body To be safe a Operators should not stand...

Page 6: ...e RF radiation may be unaware of and has no control over the radiation energy received The uncontrolled environment conditions can arise even in the best regulated operations and for this reason the limits defined for the uncontrolled environment have been assumed for the RF Central recommended limit Documents a and b also show the RF power density guidelines to be frequency dependent Different po...

Page 7: ...h a digital and analog section with common power supplies The digital section of the Receiver comprises a COFDM demodulator video decoder and audio decoder The analog section comprises an integral FM demodulator for one video channel with two associated audio channels The RFX RMR has a common RF input for both analog and digital receive modes selection of mode is via the front panel control push b...

Page 8: ...1 7 Mbit s automatic selection Bandwidth 8MHz 7 6MHz automatic selection Decoding Options MPEG 2 4 2 0 4 2 2 high quality video DVB standard Latency Selectable to less than 2 frames minimum Tx to Rx Video Output Digital SDI 270Mbit s Analog Y C component qty 1 or composite PAL NTSC qty 2 Genlock Optional PAL NTSC ASI Output ASI transport stream selectable 188 204 byte Audio Output Digital 2 x AES3...

Page 9: ...rol and Monitoring Menu selectable via the front panel control COFDM demodulator MPEG 2 decoder parameters RF Received signal level CSI BER Summary front panel alarm comprehensive internal lock alarms Power Supply 11 to 18V DC 30 Watts Mechanical Interface Tripods mast scaffold and special mounts available Size 2 U rack mount Depth 350mm Weight 7 0kg Environmental Safe use 20 to 50 C To spec 10 to...

Page 10: ...in modules or assemblies 1 Motherboard This board accommodates the COFDM demodulator and MPEG digital decoder boards as well as providing DC signal and I2 C communications routing to from all other modules The motherboard also has a 70MHz buffer amplifier on it The DC PSU is mounted on the under side 2 1st Down converter This module accepts the receiver RF input includes the PLL for receiver tunin...

Page 11: ...uding COFDM demodulator MPEG decoder PAL NTSC encoding ASI SDI routing Analog audio D A converter AES audio encoder Genlock and user data extraction 5 Analog receiver module This module accepts a feed of 70MHz from the Multi down converter via a 70MHz amplifier splitter mounted on the Motherboard The module demodulates the video and 2 audios when the RFX RMR is in analog receive mode 6 Front panel...

Page 12: ... current plan and the new plan via the push buttons and RFX RMR menus The exact frequency selected by either method is shown on the top menu page on the LCD display DC LED Lit green whenever a correct DC voltage is presented to the RFX RMR Receiver This LED will be lit irrespective of whether the unit is switched on or off Status LED Stable Green indicates that the RFX RMR is functioning correctly...

Page 13: ...ected via front panel keypad 75Ω BNC connectors female 6 3 Analog Receive Section Video output BNC connector Connector for composite video output 75Ω BNC connector female 6 4 Digital Receive Section Analog Audio outputs XLR connectors The four channels of analog audio are connected via four 3pin XLR male connectors The connectors are designated Ch1 Ch2 Ch3 and Ch4 These outputs can be independentl...

Page 14: ...ctor Connector Type 4 pin XLR connector male Input range 11 to 18V DC nominal Pin Function 1 12VDC 2 Not Used 3 Not Used 4 0V 6 7 User data future option Connector Type 9 way D type female Remote Control and Monitoring interface selectable as RS485 or RS232 future option RS232 CONNECTIONS RS485 CONNECTIONS Pin Direction Direction 1 Not Used Not Used 2 Data Tx Out from Unit Data Tx Out from Unit 3 ...

Page 15: ... Unit 4 Not Used Not Used 5 Ground Ground 6 Not Used Data Tx Out from Unit 7 Not Used Data Rx Into Unit 8 Not Used Not Used 9 Not Used Not Used 6 9 IF monitor Connector for 70 MHz IF monitoring receiver BNC connector female 6 10 Auxiliary connector Connector Type 15 way D type female Auxiliary functions e g powering of a remote LNA and remote switching Pin Pin 1 12VDC 9 Ground 2 12VDC 10 Ground 3 ...

Page 16: ... diagram Front panel display and push button control Power supply Mother board Multi Downconverter 1st Downconverter SDI or ASI video 2 CVBS 1 or Y video 11 to 18 VDC 30v 12v 12v I2 C I2 C I2 C 630MHz Analogue receiver Composite Analogue audio 1 Analogue audio 2 Analog audio 3 Analog audio 4 Genlock 70MHz monitor 70MHz 70MHz 12v 12v 4 57MHz Module locations Refer to the photograph in section 4 for...

Page 17: ...on the rear of the unit The unit contains a local oscillator which tunes according to an offset appropriate to the receiver operating frequency and is controlled by the front panel push button display system The output frequency of the first down converter is 630MHz RF input RMR RX 1st Down converter Front panel display RF frequency control VCO PLL LNA LO Mixer BP filter 630MHz to 2nd Down conv in...

Page 18: ...signal to 4 57MHz A balanced form of the 4 57MHz IF is then passed to the COFDM demodulator board as detailed in section 7 3 The module contains a 20MHz reference oscillator to lock the two mixer local oscillators There are no user serviceable parts on this module Please contact RF Central Service Department for maintenance of this unit RMR RX 3 in 1 Multi down converter Down converter 780MHz PLL ...

Page 19: ... downconverter Genlock User data CVBS 1 or Y video Genlock input Analog audio 4 Analog audio 1 This board is mounted onto the motherboard as shown in the picture in section 4 The module provides multiple functions including COFDM demodulator MPEG decoder PAL NTSC encoding ASI SDI routing Analog audio D A converter AES audio encoder Genlock and user data extraction The heart of the unit is an FPGA ...

Page 20: ...od Analogue Module Composite video Analog audio 1 Analog audio 2 Audio Subcarrier Modulator 1 Audio Subcarrier Modulator 2 Video Filter de emphasis Hi lo video deviation switching Buffer Amp Buffer Amp Black level lamp Control lines RMR D RX Analog receicer Simplified block diagram 12 v 5 v 5 v 17Bm ...

Page 21: ...range of video processing options are available via front panel selection or on board switches On board LED s are provided for audio 1 and 2 phase locked loop and power supply monitor functions 8 1 R F input circuit operation The 70MHz R F input at Skt 1 is set to 17dBm nominal 8 2 Base band video processing Provides facilities for video de emphasis black level clamp automatic deviation selection ...

Page 22: ...ll Remote control The Front Panel Display Controller is the main system controller for the unit All configurations of the unit hardware are from this board An I2 C two wire interface is used to communicate with all other intelligent devices within the unit This carries the command data and reads back status data from all boards within the unit All configuration parameters video settings audio sett...

Page 23: ...on it Multi down converter COFDM demodulator MPEG decoder 70MHz buffer amplifier upper surface DC DC PSU micro controller under surface The motherboard provides signal routing between the other modules and provides routing between Rear panel connectors Front panel push buttons and controller 1st down converter and VCO Multi down converter Demodulator decoder DC PSU supplies to other units ...

Page 24: ...lified block diagram Micro controller 11 to 18 VDC DC DC 30 VDC 12 VDC 12 VDC 1st down converter Multi down converter Aux supply Analogue RX Digital RX RL 1 RL 2 1st down control AGC volts Analog RX control Mon I2 C To analog demodulator 70MHz IF mon 70MHz from multi downconverter ...

Page 25: ...components The 10 5v supply provides the board circuits and the DC DC converter IC16 The converter provides the 4 3v supplies for the board The 5v supply is current limited by the inclusion of R56 R57 in the supply to IC7 The 10 5v supply is current limited by TR4 and sense resistors R46 R47 Supply over voltage protection is controlled by TR5 The 10 5v regulator circuit is turned off if the input ...

Page 26: ... will be off 9 3 Top level Menu Four charts showing the menu trees of the RFX RMR are included in this manual These are for Operations menu Digital receiving mode Engineering menu Digital receiving mode Operations menu Analog receiving mode Engineering menu Analog receiving mode The RFX RMR is configured using an LCD display and six push buttons These are arranged as four navigation buttons A B an...

Page 27: ...This menu is not available when the receiver is in switches control mode The menu used to select one of the ten preset channels CH1 Ch10 or manual frequency The Man setting allows the Receive frequency to be set in 0 5MHz steps anywhere within the Rx operating band The Enter button allows the A B buttons to select the required digit cursor left right the buttons then select the required value The ...

Page 28: ...ctory regarding any future software upgrades which may become available 9 5 3 Channel Plan The RFX RMR Receiver can be switched between two different sets of 10 preset RF frequencies known as the Old BAS channel plan and the New BAS channel plan The buttons are used to select the channel plan menu The Enter button then allows the buttons to select the required plan The Enter button then stores the...

Page 29: ... of three formats Title Output 204 204 byte output packet 188 188 byte output packet Byte Single BYTE packets The buttons are used to select the required output format and the Enter switch used to select and store the setting 9 5 8 Aux supply A switchable 12 VDC is provided on the Auxiliary D type connector on the receiver back panel as mentioned in clause 6 10 This may be used to feed external eq...

Page 30: ...ns to the Main menu 9 6 Operations Menu Analog mode 9 6 1 Ch Frequency Menu This menu is not available when the receiver is in switches control mode The menu is the same as the digital menu as mentioned in clause 9 4 1 9 6 2 Rx mode This menu is not available when the receiver is in switches control mode The menu used is the same as the digital menu as mentioned in clause 9 4 2 9 7 Engineering Men...

Page 31: ...he Enter button then allows the to edit the required frequency the A and B buttons are for cursor left right The Enter button then stores the value and returns to the Main menu 9 7 5 Aux supply The menu used is the same as the digital menu as mentioned in clause 9 5 8 9 7 6 Relay 1 and Relay 2 The menu used is the same as the digital menu as mentioned in clause 9 5 9 9 7 7 LCD Timeout The menu use...

Page 32: ... RX mode C E C E Key E Enter E C Enter or Clear DIGITAL RX CH1 2 49200GHz 61dBm 8 CSI Select CONTRAST CH1 0 0dB CH2 1 0dB CH3 0 0dB CH4 0 0dB B A C E E E button A cursor left button B cursor right DEMOD NOK STATUS 0010010 Alternative Demod status screen when demod is unlocked RF SYNTH STATUS First Down OK Second Down OK DECODER PIDS Prog Map 512 PCR 180 VIDEO 256 Select RX MODE Select DIGITAL RX S...

Page 33: ...ngineering menu digital RX mode ENG MENU LCD timeout Select ENABLE Select DISABLE E ENG MENU PROG CHANNELS PROG CHANNEL Ch 1 2300MHz Program Ch3 2345 00MHz PROG CHANNEL Ch 16 2700 00MHz E ENG MENU Audio offset E Audio offset EDIT 6dB ENG MENU Control Mode Control Mode Key pad Control Mode Switches E ENG MENU SW INVENTORY E TDFP 0144 01 RRMB 0101 01 RDMI 0102 01 3410AYY02 01 ENG MENU CHANNEL PLAN C...

Page 34: ...MR RX MENU Operations menu Analog RX mode C E ANALOG RX CH1 2 49200GHz 61dBm Select CONTRAST B A C E button A cursor left button B cursor right Select RX MODE Select DIGITAL RX Set Level ANALOG RX C E E E Only available in keypad mode Sub carrier Synth Audio 1 OK Audio 2 OK RF SYNTH STATUS First Down OK Second Down OK Sub carrier Freq Audio 1 4 830MHz Audio 2 5 800MHz RMR MENU 3 ...

Page 35: ...OG CHANNEL Ch 1 2300 00MHz Program Ch3 2345 00MHz PROG CHANNEL Ch 16 2700 00MHz E ENG MENU Control Mode Control Mode Key pad Control Mode Switches E ENG MENU SW INVENTORY E TDFP 0144 01 RRMB 0101 01 RDMI 0102 01 3410AYY02 01 ENG MENU CHANNEL PLAN CHANNEL PLAN NEW CHANNEL PLAN OLD E ENG MENU Aux supply Aux supply Off Aux supply On E button A cursor left button B cursor right ENG MENU Black lvl clam...

Page 36: ...PROGCHANNEL Ch 1 2300MHz Program Ch3 2345 00MHz PROGCHANNEL Ch 16 2700 00MHz E ENG MENU Control Mode Control Mode Key pad Control Mode Switches E ENGMENU SWINVENTORY E TDFP 0144 01 RRMB 0101 01 RDMI 0102 01 3410AYY02 01 ENGMENU CHANNEL PLAN CHANNEL PLAN NEW CHANNEL PLAN OLD E ENG MENU Aux supply Aux supply Off Aux supply On E button A cursor left button B cursor right ENGMENU Black lvl clamp Black...

Page 37: ... 90 degree sector coverage Parabolic antennas offer the highest gain and longest operation range Full details are given in the RF Central Antennas data sheets 10 1 2 Checks The Receiver may be powered from an external DC PSU or by batteries Check that any batteries to be used are fully charged and that an emergency spare battery is available and fully charged Select the operating mode switches or ...

Page 38: ...ount the equipment make sure that some means of securing the tripod or of weighting it down is provided Gusty wind conditions may put installations at risk particularly when parabolic antenna dishes are to be used Make sure that all batteries to be used are fully charged and whenever possible provide a spare with cable to connect it to the receiver Check that the receiver channel frequencies are c...

Page 39: ...Hyper Terminal or other terminal emulator the RFX RMR can be configured without the use of the operator controls and LCD display The current configuration can also be obtained via this RS232 RS485 interface The RMR is also remote controllable via other commercially available control systems ...

Page 40: ...AM 1 2 1 32 422P ML GOP4 10 00 Yes No 192 7 PBMP 4087 0012 08 12 064171 16QAM 1 2 1 32 422P ML GOP16 9 50 Yes No 192 8 PBMP 4087 0012 02 9 048128 QPSK 3 4 1 32 422P ML GOP16 7 25 Yes No 192 9 PBMP 4087 0010 02 9 048128 QPSK 3 4 1 32 422P ML GOP 4 7 50 Yes No 192 10 PBMP 4087 0009 02 9 048128 QPSK 3 4 1 32 422P ML GOP4 7 50 Yes No 192 11 PBMP 4087 0011 02 9 048128 QPSK 1 2 1 32 422P GOP16 7 00 Yes ...

Page 41: ... 85 5 53 4 98 2 3 8 04 7 81 7 37 6 64 3 4 9 05 8 78 8 29 7 46 5 6 10 1 9 76 9 22 8 29 7 8 10 6 10 2 9 68 8 71 16 QAM 1 32 1 16 1 8 1 4 1 2 12 1 11 7 11 1 9 95 2 3 16 1 15 6 14 7 13 3 3 4 18 1 17 6 16 6 14 9 5 6 20 1 19 5 18 4 16 6 7 8 21 1 20 5 19 4 17 4 64 QAM 1 32 1 16 1 8 1 4 1 2 18 1 17 6 16 6 14 9 2 3 24 1 23 4 22 1 19 9 3 4 27 1 26 3 24 9 22 4 5 6 30 2 29 3 27 6 24 9 7 8 31 7 30 7 29 0 26 1 ...

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