EMS Wireless DataNex Data-20 User'S Reference Manual Download

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5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: 770-831-8598

Type Acceptance Test Report

Broad Band PCS Transceiver

FCC ID: DNY0A5DATA1900

FCC Rule Part: 24E

ACS Report Number: 03-0096-24TA

Manufacturer: EMS Wireless

Model: DataNex

Installation and Operators Guide

Summary of Contents for DataNex Data-20

Page 1: ... USA Voice 770 831 8048 Fax 770 831 8598 Type Acceptance Test Report Broad Band PCS Transceiver FCC ID DNY0A5DATA1900 FCC Rule Part 24E ACS Report Number 03 0096 24TA Manufacturer EMS Wireless Model DataNex Installation and Operators Guide ...

Page 2: ...EMS Wireless DataNex Data 20 Digital Radio User Reference Manual 2850 Colonnades Court NW Norcross GA 30071 Phone 770 582 0555 Fax 770 729 0075 ...

Page 3: ...Table of Contents ii DataNex EMS Wireless DATA 20 Digital Radio Document Number Rev A Last Saved NXE1 Manual Dwg Revision Levels Section Drawing No REV Revised Released Reason Data 20 A SN NEW ...

Page 4: ...iving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help In accordance with FCC regulations regarding human exposure to radiofrequency energy this device shall be installed such that a minimum separation distance ...

Page 5: ...Notices 2 1 2 3 Rack Mount 2 2 2 4 Duplexer Internal External 2 2 2 5 Rear Panel Connections Indicators 2 3 2 6 Power Requirements 2 5 2 6 1 Power Supply Card Slot Details 2 5 2 6 2 AC Line Voltage 2 5 2 6 3 DC Input Option 2 6 2 6 4 Fusing 2 6 2 7 Power Up Setting 2 6 2 8 Data Interface 2 8 2 8 1 4xE1 T1 MUX Channel Configurations 2 8 2 9 Hot Standby Protected Configuration 2 9 2 9 1 Hot Cold Sta...

Page 6: ...9 System Transfer 3 14 3 4 10 External I O 3 15 3 4 11 Alarms 3 16 3 4 12 Faults 3 17 3 4 13 G821 Parameters 3 17 3 4 14 QAM Modem Status 3 18 3 4 15 QAM Radio TX Status 3 21 3 4 16 QAM Radio RX Status 3 22 3 4 17 QAM Radio TX Control 3 22 3 4 18 QAM Radio RX Control 3 23 3 4 19 QAM Modem Configure 3 24 3 4 20 QAM Radio TX Configure 3 30 3 4 21 QAM Radio RX Configure 3 31 3 5 NMS CPU PC Configurat...

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Page 8: ...lay personality modules Figure 1 1 DATA 20 Modular Open Architecture The high spectral efficiency of the DATA 20 is achieved by user selectable QPSK or 16 QAM Powerful Reed Solomon error correction coupled with a 20 tap adaptive equalizer provides unsurpassed signal robustness in hostile RF environments 1 2 System Features Selectable Rates 512 kbps to 8 448 Mbps Selectable Spectral Efficiency of 1...

Page 9: ...ypical Configurations 1 3 1 Data Rate and Interface Table 1 1 provides basic data channel capabilities for the DATA 20 See Section 2 Installation for more detailed information Table 1 1 DATA 20 Data Channel Configurations Data Rate MUX Hardware Channels Interface s 1 5 Mbps 8 Mbps 2 or 4 x E1 T1 2 or 4 G 703 E1 T1 512 kbps 2 Mbps QAM Modem 1 Fractional E1 T1 512 kbps 2 Mbps QAM Modem 1 V35 RS449 1...

Page 10: ...s been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction man...

Page 11: ...sal Input AC DC Optional System Monitor A D RF Module Down Converter Up Converter IF Card Down Converter Up Converter 400 MHz 1 5 GHz TX RX 70 MHz QAM Modem Demodulator Modulator Intelligent MUX 5 15 VDC 130 Watt Power Supply BarGraph 4 x 20 LCD Display Status LEDs Front Panel System CPU NMS Remote I O Front Panel Interface Serial PC Interface Status Command Control I O 4 Port Data Voice Interface...

Page 12: ...GA EEPROM uC EEPROM MICRO CONTROLLER LEVEL TRANSLATOR RS232 TRANSLATOR QAM DECODER INTERLEAVE RAM RATE CONVERTER PLL FIFO SPI IF SYNTH IF STATUS IF OUT IF REF CLK OUT TRUNK I O TXD BUS DATA CLK IN BUS REF CLK OUT BUS I2C IN RXD IF IN AGC BUS DATA CLK OUT DEBUG LED STATUS REF CLK NO CONNECTION uC BUS LEGEND Figure 1 5 QAM Modem Block Diagram The QAM Quadrature Amplitude Modulation Modulator is the ...

Page 13: ...onverter Block Diagram The resultant carrier is translated up to 70 MHz by the IF Upconverter see Figure 1 6 This is accomplished by a standard mixing of the carrier with a phase locked LO A 70 MHz SAW filter provides an exceptional spectrally clean output signal 1 5 3 RF Upconverter 12 8 MHz Ref Osc BPF 70 MHz IF Input uP RFA Fwd Pwr Level IPA Level Synth Level Temp Sense Synth Lock RF Output TX ...

Page 14: ...he power up RF conditions of the transmitter output 1 5 4 Power Amplifier PA The Power Amplifier PA is a separate module that is mounted to a heat sink and is fan cooled for reliable operation The PA is a design for maximum linearity in an amplitude modulation based system 1 5 5 RF Downconverter BPF Diplexer 70 MHz RF Input RF AGC IF Amp IF Output 70 MHz to QAM Demod Preamp ALC Loop Amp ALC Det At...

Page 15: ... card The IF Downconverter receives the 70 MHz carrier from the receiver portion of the RF Module via an external semi rigid cable and directly converts the carrier to 6 4 MHz by mixing with a low noise phase locked LO see Figure 1 9 System selectivity is achieved through the use of a 70 MHz SAW filter The QAM Demod receives and demodulates the 6 4 MHz carrier see Figure 1 7 The demodulation proce...

Page 16: ...n shipping Inspect all items for damage and or loose parts Contact the shipping company immediately if anything appears damaged If any of the listed parts are missing call the distributor or the factory immediately to resolve the problem 2 2 Notices CAUTION DO NOT OPERATE UNITS WITHOUT AN ANTENNA ATTENUATOR OR LOAD CONNECTED TO THE ANTENNA PORT DAMAGE MAY OCCUR TO THE TRANSMITTER DUE TO EXCESSIVE ...

Page 17: ...ction length in excess of 1 meter in strong RF environments We highly recommend installation of lightning protectors to prevent line surges from damaging expensive components 2 3 Rack Mount The product is normally rack mounted in a standard 19 cabinet Leave space clear above or below the unit for proper air ventilation of the card cage The rack ears are typically mounted as shown in Figure 2 1 Oth...

Page 18: ...xt of the connections and LED indicators Figure 2 2 DATA 20 Rear Panel Connections Power Supply Inputs AC Universal Input 100 240V 50 60 Hz IEC 3 conductor DC 24v 48v Isolated Input 2 pin socket custom Status LED 12V Green LED indicates 12 volt supply OK 5V Green LED indicates 5 volt supply OK NMS Card I O Port RS232 PC access 9 pin D sub female Reset Switch Activates hard system reset Status LED ...

Page 19: ...female Upconverter output to be applied to linear Power Amplifier module internal to radio 70 MHz IN SMA female Modulated IF input from QAM Modulator RF IN SMA female Receiver input 70 MHz OUT SMA female Downconverter output to Modulator input Status LED TX LOCK GREEN indicates TX AFC LOCK Flashing RED indicates LOSS OF TX LOCK RX LOCK GREEN indicates RX AFC LOCK and strong RX signal YELLOW indica...

Page 20: ...ges 5 and 12 are summed in the backplane and provide the supply the plug in modules NOTE The front panel LCD screen displays the system supply voltages and the nomenclature follows the physical location of the power supply modules 2 6 2 AC Line Voltage The DATA 20 uses a high reliability universal input switching power supply capable of operating within an input range of 100 240 VAC 50 60 Hz The p...

Page 21: ... modules all fusing is located on the carrier PC board Always replace any fuse with same type and rating Other fuses are present on the board and are designed for output fail safe protection of the system All output fuse values are printed on the backside of the PC board to aid in replacement NOTE If a fuse does blow in operation investigate the possible cause of the failure prior to replacing the...

Page 22: ...ch Screen for CONTROL TX press ENTER CONTROL QAM Radio Launch TXA TX Radiate QAM Radio TX Control AUTO Verify the AUTO setting AUTO Transmitter will protect its PA by folding back the ALC under bad load VSWR condition default setting ON Transmitter will remain in radiate at full power under all antenna port conditions not recommended OFF Transmitter in standby mode ...

Page 23: ... 8 1 4xE1 T1 MUX Channel Configurations Trunk I O Async Data Channel Channel 3 4 E1 T1 Channel 1 2 E1 T1 Aux Channel 1 Aux Channel 2 Figure 2 3 4XE1 T1 MUX Panel The 4xE1 T1 MUX is a high speed card up to 8 MBPS that has a total of 7 ports Table 2 1 summarizes the capabilities EMS ...

Page 24: ... AUX could be a single channel of 256 KBPS 2 9 Hot Standby Protected Configuration The DATA 20 may be installed in a hot standby protected configuration This consists of twoDATA 20 chassis with a TP64 transfer panel Figure 2 5 Transfer Panel Connection The usual hot standby configuration uses an external duplexer This minimizes RF losses and provides independent TX and RX module switching A duplex...

Page 25: ...s Hot Standby preferred Hot standby leaves both transmitters in the RADIATE ON condition and the transfer logic controls the RF relay to select the active transmitter thereby decreasing switchover time This is the preferred operating mode Cold Standby Cold standby can be used in situations where lower power consumption is a priority In this mode the transfer logic will control the RADIATE function...

Page 26: ...d that the module is performing within its specified limits Yellow The indicated module is in standby mode ready and able for back up transfer Red There is a fault with the corresponding module It is not ready for backup and the TP64 will not transfer to that module TRANSFER Switches The RADIO A and RADIO B transfer switches cause the selected radio to become active and the Master See Section 3 4 ...

Page 27: ...c A FAIL FAIL RED RED N A None B OK OK YEL GRN B B B OK FAIL GRN RED A A B FAIL OK RED GRN B B B Master Logic B FAIL FAIL RED RED N A None A Master Logic default power up If RADIO A is good the TP64 will remain in RADIO A position regardless of RADIO B s status If RADIO A fails the TP64 will switch to RADIO B assuming that RADIO B is good If RADIO A then returns to a good condition the TP64 will s...

Page 28: ...of available settings for the Control and Configuration menus are located in Section 3 Operation of the Front Panel Shown here are the applicable settings for redundant standby systems Clock Settings For proper operation the clock settings located in the QAM Radio Config Modem Menu must be set as follows QAM Interface Intfc TRUNK Tx In Clock Clk Phase INVERTED Rx Clock Out Clk Phase NORMAL Trunk O...

Page 29: ... Master Select as described above there are no user configurable settings in the TP64 unit 2 9 3 Hot Standby Control with Single Unit 2 9 3 1 DATA 20 Software Settings The full array of available settings for the Control and Configuration menus are located in Section 3 Operations Shown here are the applicable settings for single systems Clock Settings All controls and indications can be found on t...

Page 30: ... usually preceded by a pre installation site survey of the facilities The purpose of this survey is to familiarize the customer with the basic requirements needed for the installation to go smoothly The following are some considerations to be addressed refer to Figure 2 8 for Site Installation Details Before taking the product to the installation site verify that the interface connections are comp...

Page 31: ...lly the antenna connected to the transmitter is a directional high gain antenna fixed mounted on the side or top of a building or on a tower Depending upon the application and the gain of the antenna the total composite power could exceed 20 to 61watts EIRP The antenna location should be such that only qualified technical personnel can access it and that under normal operating conditions the anten...

Page 32: ... the front panel operation of the DATA 20 digital radio modem This includes LCD display including all screen menus Cursor and screen control buttons LED status indicators 3 2 Front Panel Operation A picture of the DATA 20 front panel is depicted in Figure 3 1 below ...

Page 33: ... backlight will automatically turn on as soon as any button is pressed Contrast Adjustment Internal adjustment on board in back of front panel button PCB 3 2 2 Cursor and Screen Control Buttons The buttons on theDATA 20 front panel are used for LCD screen interface and control functions ENT ENTER Used to accept an entry such as a value a condition or a menu choice ESC ESC Used to back up a level i...

Page 34: ... RF output forward power is above the factory set threshold 3 2 4 Screen Menu Tree Structure Figures 3 2a b and c located on pages 3 7 3 8 3 9 and 3 10 show the tree structure of the screen menu system The figures group the screens into functional sets There may be minor differences in the purchased unit due to software enhancements and revisions The current software revision may be noted in the S...

Page 35: ...o 3 3 Main Menu METER QAM RADIO Data 20 MAIN MENU SYSTEM ALARMS FAULTS Scroll The main menu appears on system boot up and is the starting point for all screen navigation Unlike most other screens in the software the main menu scrolls up or down one line item at a time ...

Page 36: ...R QAM RADIO Data 20 MAIN MENU SYSTEM ALARMS FAULTS Scroll CONFIGURE QAM Radio Launch MODEM STATUS QAM Radio Launch TX STATUS QAM Radio Launch RX ENT ENT FreqA QAM Radio TX Status MHz More Screens see Menu Flow Diagram CONTROL QAM Radio Launch MODEM STATUS QAM Radio Launch MODEM STATUS QAM Radio Launch MODEM Cycle through STATUS CONTROL CONFIGURE choices Cycle through MODEM TX RX choices TX STATUS ...

Page 37: ...Front Panel Operation 3 6 DataNex EMS Wireless DATA 20 Digital Radio This page is intentionally blank ...

Page 38: ...O Data 20 MAIN MENU SYSTEM ALARMS FAULTS Sc roll Fault s Fwd Pwr 0 5 W 15 18 43 6 29 00 SYSTEM CARD VIEW POWER SUPPLY INFO System FACTORY CAL Scr oll BASIC CARD SETUP UNIT WIDE PARAMS Meter System Al F l Transfer Tx Transfer OFF Rx Transfer OFF Ext A D Readings 1 0 56 2 0 00 3 0 00 4 0 00 Ext A D Readings 1 2 3 4 OFF OFF OFF OFF Ext Relays RELAY CONTROLS MAP FAULTS RELAYS Ext D A Output RX SIG LVL...

Page 39: ...creens are the default METER QAM RADIO Data 20 MAIN MENU SYSTEM ALARMS FAULTS Scr oll Factory Calibrate RADIO TX RADIO RX QAM MODEM SYSTEM RADIO RX A CAL RSL AFC LVL LO LVL LO LVL A CAL Calibr Val 100 Reading 4 05 AFC LVL A CAL Calibr Val 4 50 Reading 4 05 RSL A CAL RADIO RX CAL UNIT A UNIT B RADIO RX B CAL RSL AFC LVL LO LVL Calibr Val 50 00 Hi Reading 0 00 LO LVL B CAL Calibr Val 100 Reading 4 0...

Page 40: ...eens which are grouped in the STATUS CONTROL and CONFIGURE categories 3 4 1 Meter Meter DECDR 1 Bargraph Led Dsp A Function Settings Summary Bargraph ENCDR1 2 etc DECDR1 2 etc NONE Selects the desired audio source for display on the audio level bargraph Turns off the bargraph Led Dsp A B The status of Radio A or Radio B is displayed on the LEDs on the front panel 3 4 2 System Card View Cards Activ...

Page 41: ... the unit The base address B Addr is listed for diagnostic purposes only 3 4 3 System Power Supply Power Supply Status Primary 5VD 15VD AC 5 00 V 15 00 V Function Settings Summary Primary AC DC Indicates type of supply in primary slot A Universal AC input DC Option 5 VD 0 9 99 V 5 20 V nominal Voltage level of the main 5 volt supply 15 VD 0 99 9 V 15 2 V nominal Voltage level of the main 15 volt s...

Page 42: ... A or B Audio Enc ENC1 2 Audio Encoder installed and identified affects meter selection of bargraph Audio Dec DEC1 2 Audio Decoder installed and identified affects meter selection of bargraph MUX MUX 0 1 Mux Module installed and identified Chnl Cd CHC 1 2 Channel Card installed and identified Note These are factory settings of installed cards used to control appropriate displays in the CARD VIEW s...

Page 43: ... Chnl Base Addr 0 Hooked to Radio NO Mux 0 Channel Types 1 NONE 3 NONE 2 NONE 4 NONE Channel Card 1 In system YES Base addr 0 Channel Card 1 Channel Types 1 NONE 3 NONE 2 NONE 4 NONE 3 4 6 System Factory Calibration Factory Calibrate RADIO RX QAM Modem RADIO TX System The Factory Calibration Screens are documented in Figure 3 2 Screen Menu Tree The user may refer to this diagram when instructed to...

Page 44: ...FF Hot Standby Dual Radio operation Single Radio operation IP Integer 0 255 Internet Protocol IP address of the device These values must be set for the device to possess network capabilities SNM Integer Subnet Mask of the device Only needs to be set if the device is to use its network capabilities Subnetting allows network administrators additional flexibility in defining relationships among netwo...

Page 45: ... NMS and Fault Alarm logging After selection press ENTER to save Hour Minute Second 00 23 00 59 00 59 Sets the system time used for NMS and Fault Alarm logging After selection press ENTER to save 3 4 9 System Transfer Transfer Tx Transfer OFF Rx Transfer OFF Function Settings Summary TX Transfer OFF HOT COLD Configures the internal logic for transfer panel TP64 TX control RX Transfer OFF ON Config...

Page 46: ...ut RX SIG LVL Function Settings Summary Ext A D Readings 1 2 3 4 Voltage readings via the NMS I O card Ext Status Readings 1 2 3 4 Logic Level readings via the NMS I O card Ext Relays 1 2 3 4 Control of relays at the NMS I O card Map Faults Relays ON OFF Maps pre determined fault conditions to trigger relays at the NMS I O card Ext D A Output RX SIG LVL NOTHING TX FWD PWR External output follows R...

Page 47: ...RF RX RSL 30 to 90 dBm LO Level 100 50 QAM MODEM BER 1 00E 04 Synth Level 100 50 Modulator only Modem Level 100 50 Alarm definition A specific parameter is out of tolerance but is NOT crucial for proper system operation ALARMS are cautionary only and indicates a degradation in a system parameter Logging All fault and alarm events are logged with the date and time Alarm screen reset After viewing t...

Page 48: ...finition A specific parameter is out of tolerance and is crucial for proper system operation Logging All fault and alarm events are logged with the date and time Fault screen reset After viewing the screen press ENTER to clear all logs entries If the fault has been corrected no new logs will be generated 3 4 13 G821 Parameters QAM Modem SLOSS 0 000E 00 ES 0 000E 00 SES 0 000E 00 UNAS 0 000E 00 Fun...

Page 49: ...its Errors 80 dBm 0 00E 00 0 0000E 00 0 0000E 00 Function Settings Summary BER Post 0 00E 00 Post FEC Forward Error Correction Bit Error Rate since last ENTER reset BER Pre 0 00E 00 Pre FEC Forward Error Correction Bit Error Rate since last ENTER reset Bits 0 0000E 00 of Bits counted since last ENTER reset Errors 0 0000E 00 of Errors counted since last ENTER reset Note Received Signal Level ...

Page 50: ...g data clock IFMOD 0 100 100 NOM BAUD LOCK default UNLOCK Indicates demodulator PLL is locked to incoming data clock FEC LOCK default UNLOCK Indicates FEC decoder is synchronized SYNTH LOCK default UNLOCK Confirms 70 MHz IF synthesizer is phase locked AFC 0 9 9 VDC 3 7 VDC nominal 70 MHz IF synthesizer AFC voltage IFOUT 0 100 100 nominal Modulator level Mode 16 64Q Modulation mode 16QAM 32QAM 64QA...

Page 51: ...rator Interface Trunk Active Interface Clk Src Tx Clock Internal EXT TXC EXT RXC Recovered Clock source of the Transmitter Clk Ph Tx Clock Inverted Normal Clock Phase of the Transmitter Clk Ph Tx Clock Out Inverted Normal Clock Phase of the Transmitter Clock Out Data Src Rx Out Norm RPT Loop Data Source of the Receiver Out Normal means the source is either BKPLN or TRNK RPT sets the radio to Repea...

Page 52: ...t nominal Output Power of TX This menu item does not appear when the unit is configured for DTV REV 0 9 99 Watt 0 07 Watt nominal Reverse or reflected power at antenna port This menu item does not appear when the unit is configured for DTV PA CUR 0 00 9 99 Amp 2 40 Amp nominal Power amplifier current consumption This menu item does not appear when the unit is configured for DTV TEMP 0 99 9 deg C 4...

Page 53: ...o 90 0 dBm Received signal level signal strength Nominal level dependent upon customer path system gain ATTEN AUTO default ON OFF Receiver PIN attenuator setting Controlled by internal software Forced ON Forced Off SYNTH LOCK default UNLOCK Indicates phase lock of the 1st LO AFC 0 9 9 VDC 3 5 VDC nominal 1st LO PLL AFC Voltage LO 0 99 9 100 nominal 1st LO relative power level 3 4 17 QAM Radio TX C...

Page 54: ...ation DataNex EMS Wireless DATA 20 Digital Radio 3 4 18 QAM Radio RX Control RX Atten QAM Radio RX Control AUTO Function Settings Summary RX A ATTEN AUTO default ON OFF ON and is activated on high signal level ON always OFF ...

Page 55: ...on Settings Summary Interface QPSK 2 16Q 4 32Q 5 64Q 6 128Q 7 256Q 8 Default is 64QAM DATA RATE N x 64 kbps Valid range depends upon configuration INTERLEAVE 1 2 3 default 4 6 12 2 17 2 34 2 51 2 68 2 102 2 204 Interleave depth 1 to 204 SPECTRUM INVERT default FILTER 18 15 default 12 Nyquist roll off factor ENCODING DVB default Raw data format TEST NORMAL default PRBS15 PRBS23 Test pattern length ...

Page 56: ...he Transmitter Clk Ph Tx Clock Out Inverted Normal Clock Phase of the Transmitter Clock Out Data Src Rx Out Norm RPT Loop Data Source of the Receiver Out Normal means the source is either BKPLN or TRNK RPT sets the radio to Repeater Loop sets the radio to loopback mode Clk Src Rx Out Internal EXT TXC EXT RXC Recov Clock Source of the Receiver Out Clk Ph Rx Out Norm Inverted Clock Phase of the Rece...

Page 57: ... DCE Configured as DTE Repeater DCE coupled with a DTE Configured as DCE A DCE coupled together with a DTE enables the signal to be relayed to another DCE This configuration is called a Repeater A network can consist of as many Repeaters as necessary The following sub sections describe how to configure the DATA 20 a DCE or as a DTE 3 4 19 2 DATA 20 as Data Communications Equipment DCE By default t...

Page 58: ...ystem menu TX CLOCK Clk Src Recov Clk Ph Norm TX CLK OUT Clk Ph Norm RX CLOCK Clk Src Recov Clk Ph Norm QAM Inerface Intfc DCE Trunk 3 4 19 3 DATA 20 as Data Terminal Equipment DTE When configured as Data Terminal Equipment DTE the DATA 20 gets its clock from an external source such as a telecommunications device Telecom Equipment Configured as DTE Rx Clock Tx Clock ...

Page 59: ...eless DATA 20 Digital Radio To configure the DATA 20 as a DTE make the following clock selections in the System menu TX CLOCK Clk Src EXT TXC Clk Ph Norm TX CLK OUT Clk Ph Norm RX CLOCK Clk Src EXT TXC Clk Ph Norm QAM Interface Intfc DTE Trunk ...

Page 60: ...3 29 Front Panel Operation DataNex EMS Wireless DATA 20 Digital Radio 3 4 19 4 User Clock Options Conceptual Diagram Figure 3 4 User Clock Options Conceptual Diagram ...

Page 61: ...0 LO Step KHz 25 0 press ENTER press ESC Save Setting No press Left arrow to say YES press ENTER Function Settings Summary FREQ 2300 00 MHz Displays the frequency of the transmitter and allows the user to make frequency changes LO Side LOW HIGH LOW LO freq is less than carrier freq High LO freq is greater than carrier freq LO Freq 2370 MHz LO Step 25 0 KHz Programming frequency step size ...

Page 62: ...is greater than carrier freq LO Freq 2370 00 MHz LO Step 25 0 KHz Programming frequency step size 3 5 NMS CPU PC Configuration Software The NMS CPU card is configured with a Windows based PC software package The hardware is accessed through the serial port on the NMS card back panel See the manual for EMS Wireless DATA 20 Configuration Software for more information 3 6 Up Down Converter Frequency ...

Page 63: ...s STATUS QAM Radio Launch TXA AFC VDC TX LO Xctr 50 50 4 5 1 Ensure that the voltage reads 0 5 to 9 5 25 VDC 2 The TX should achieve AFC LOCK and the operation is successful 3 6 2 AFC Level RX It is possible to change the operating frequency of the receiver via the front panel Before changing frequency ensure that this is carried out in a controlled environment with test equipment to ensure that y...

Page 64: ...ired frequency Press ENTER and the RX will most likely lose AFC LOCK 2 Navigate the LCD screens to monitor the AFC voltage as follows STATUS QAM Radio Launch RXA RX VDC AFC LO SYNTH LOCK 4 5 100 3 Ensure that the voltage reads 0 5 to 9 5 25 VDC 4 The RX should achieve AFC LOCK and the operation is successful ...

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Page 66: ...VE DATA B RXC_O_B RXC_O_A TXC_O_B TXC_O_A 10 1 11 2 3 RECEIVE TIMING A RECEIVE TIMING B SIGNAL GROUND SEND TIMING B SEND TIMING A V B X Y AA CHASSIS GROUND A MUX CHANNEL HD15M V 35 FEMALE TWISTED PAIR INDICATES DCE CONN SHELL GND SIG_GND DATA SET READY DATA TERMINAL READY E F H C D RECEIVE LINE SIGNAL DETECTOR CLEAR TO SEND REQUEST TO SEND SHIELD Figure 4 1 Mux Channel V 35 DCE ...

Page 67: ...Appendix 4 2 DataNex EMS Wireless DATA 20 Digital Radio Figure 4 2 Trunk to Trunk Cable Mux Trunk Null ...

Page 68: ...el Service Unit D A DAC Digital to Analog Digital to Analog Converter DB Decibel DBc Decibel relative to carrier DBm Decibel relative to 1 mW DBu Decibel relative to 775 Vrms DCE Data Circuit Terminating Equipment DSP Digital Signal Processing DSTL Digital Studio Transmitter Link DTE Data Terminal Equipment DVM Digital Voltmeter EIRP Effective Isotropic Radiated Power EMI Electromagnetic Interfere...

Page 69: ...bit Mbps Megabits per second Modem Modulator demodulator Ms Millisecond MSB Most significant bit MUX Multiplex Multiplexer µs Microsecond µV Microvolts NC Normally closed NMS Network Management System NO Normally open PCB Printed circuit board PCM Pulse Code Modulation PGM Program PLL Phase Locked Loop QAM Quadrature Amplitude Modulation R Transmission Rate RF Radio Frequency RPTR Repeater RSL Rec...

Page 70: ... VRMS Volts root mean square VSWR Voltage standing wave ratio ZIN Input Impedance ZOUT Output Impedance 5 2 Conversion Chart microvolts to dBm impedance 50 ohms microvolts dBm microvolts dBm 0 10 127 0 180 61 9 0 25 119 0 200 61 0 0 50 113 0 250 59 0 0 70 110 1 300 57 4 1 0 107 0 350 56 1 1 4 104 1 400 54 9 2 0 101 0 450 53 9 2 5 99 0 500 53 0 3 0 97 4 600 51 4 3 5 96 1 700 50 1 4 0 94 9 800 48 9 ...

Page 71: ... 3 500 36 1 16 82 9 4 000 34 9 18 81 9 4 500 33 9 20 81 0 5 000 33 0 25 79 0 6 000 31 4 30 77 4 7 000 30 1 35 76 1 8 000 28 9 40 74 9 9 000 27 9 45 73 9 10 000 27 0 50 73 0 22 36 mV 20 10 mW 60 71 4 70 7 mV 10 100 mW 70 70 1 223 6 mV 0 1 mW 80 68 9 707 1 mV 10 10mW 90 67 9 2 23 V 20 100 mW 100 67 0 7 07 V 30 1 W 120 65 4 15 83 V 37 5 W 140 64 1 22 36 V 40 10 W 160 62 9 ...

Page 72: ...5 5 Appendix DataNex EMS Wireless DATA 20 Digital Radio ...

Page 73: ...Appendix 5 6 DataNex EMS Wireless DATA 20 Digital Radio ...

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