Axcera 5720 Series Скачать руководство пользователя

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Group Delay Equalization Circuitry

A set group of delay equalizer circuits can be inserted into the signal path after the ALC

attenuator circuit. These have been designed for improved group delay performance for

certain filtering and channel combining schemes. A description of these circuits are given

below.

Band Pass Filtering Circuitry

Several selections of band pass filters are provided after delay equalization to reduce out of

band products.

44 MHz Version

Equalizer Circuit

Operation

Delay Equalizer 1

Selected for equalization of digital systems using adjacent or channel combiners

selected with jumper J35 and J36

non adjacent channel combiners as well as analog systems using adjacent
combiners

Attenuation Equalizer 1

Always selected when delay equalizer 1 is selected

selected with jumper J37 and J38

Delay Equalizer 2

Selected for equalization of lumped element band pass filter circuit which

selected with jumper J43 and J44

can also be selected on the module

Delay Equalizer 3

Selected for equalization of analog systems using adjacent or non adjacent

selected with jumper J33 and J34

channel combiners

36 MHz Version

Equalizer Circuit

Operation

Delay Equalizer 1

Selected for analog systems using adjacent combiners

selected with jumper J35 and J36

Attenuation Equalizer 1

Always selected when delay equalizer 1 is selected

selected with jumper J37 and J38

Delay Equalizer 2

Selected for equalization of lumped element band pass filter circuit which

selected with jumper J43 and J44

can also be selected on the module

Delay Equalizer 3

Selected for equalization of analog systems using adjacent or non adjacent

selected with jumper J33 and J34

channel combiners

Attenuation Equalizer 3

Always selected when delay equalizer 3 is selected

selected with jumper J33 and J34

Filter Circuit

Operation

BPF

Used in most analog and digital systems. Delay equalization for this filter

Lumped element band pass filter

is activated by selecting delay equalizer 2

SAW (optional)

Used in digital systems that require sharper out of band filtering of the

Surface acoustic wave filter

IF input

NONE

Filtering is bypassed with this option.

Содержание 5720 Series

Страница 1: ......

Страница 2: ...lation System Description Specifications System Block Diagram and Interconnect Front Panel Rear Panel OPERATION Initial Turn On Status Screens Setup Screens MODULES Module Replacement How to replace a module Backplane Board Description Modulator Module optional Description Power Supply Module Description Power Amplifier Module Description LO Upconverter Module Description If Processor Module Descr...

Страница 3: ...hinged front panel eliminates the need to remove the unit from the cabinet for routine inspection and maintenance 5720 series products can also be upgraded just by making a few simple adjustments and changing specific modules With additional features such as ability to connect to external am plifiers change output power and an optional spectral shaping fil ter 5720 series products are versatile as...

Страница 4: ...ent any in transit damage is discov ered report it to the carrier Axcera is not responsible for damage done by the carrier If the equipment is not going to be installed immediately return all items to their original packaging for safe storage Save all packing material for future use If equipment is ever removed from the site the original packaging will ensure the safe trans port of it Keep at leas...

Страница 5: ...ear of the tray Connect either the Baseband Balanced Mono Audio Signal Input to J11 a 600 ohm 3 terminal block connector located on the rear of the tray or the Unbalanced Composite Stereo Audio Sig nal Input to J3 a 75 ohm BNC connector also located on the rear of the tray Input Connections for Digital Operation Connect the Digital IF Signal Input to J14 a 75 ohm BNC connec tor located on the rear...

Страница 6: ...ry set to a specific channel in the 2076 2700 MHz range QAM signals up to M 256 as well as NTSC and PAL modulation can be processed by the unit A center frequency of either 44 MHz or 36 MHz can be set at the factory prior to shipment All 5720 series transmitters are compatible with SCADA Using SCADA allows operators to monitor and control systems from remote locations ...

Страница 7: ...ange to modularity reflect a long term commitment to our global partners These transmitters provide a platform which allows for simplified installation field service and system upgrades Axcera has taken significant steps to reduce system operating costs and size while providing a solution that works for either analog or digital transmission Compatible with Digital and Analog Modulation The 5720 se...

Страница 8: ...the system purchase price because only one antenna and waveguide run are required Anytime Anywhere Communication and Backup With the SCADA system operators have real time remote and local control of the transmitter system and site Graphic user interfaces simplify integration with Windows or UNIX based SNMP network management systems Axcera s automatic backup system permits a scaleable number of ch...

Страница 9: ...to 8 dBm average Analog Visual Performance6 Frequency Response 1 0 dB Differential Gain 5 Differential Phase 3 ICPM 3 Envelope Delay Per FCC or CCIR system Video Input Impedance 75 Ohms Video Input Level 1 V p p Emission Designator 5M75C3F or per CCIR Analog Aural Performance6 Output Power 15 dB relative to visual power Frequency Deviation Capability Up to 75 kHz Harmonic Distortion 0 5 FM Noise 5...

Страница 10: ... forward power reflected power RF channel ALC voltage AFC voltage IF input status output power status PLL locked status external reference present status amplifier module status temperature fault status power supply status external amplifier module status external amplifier tem perature status external amplifier power supply status internal modulator PLL status internal modulator input status oper...

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Страница 15: ...4 873 8100 model MODEL MODELO MODELO RF channel RF CHANNEL CANAL RF CANAL RF version 1 0 VERSION 1 0 VERSION 1 0 VERSÃO 1 0 scada address SCADA ADDRESS DIRECCION SCADA DESTINO SCADA output power OUTPUT PWR POTENICA POT SAIDA external amplifier EXT OUT PWR POT AMP EXT P SAIDA AMP output power reflected power RFL PWR POT RFL POT RFL external amplifier EXT RFL PWR POT RFL EXT POT RFL EXT reflected po...

Страница 16: ...lator input OK MODULATR INPUT OK MOD OK ENT MODULO OK modulator input fault MODULATR INPUT FAULT FALLA MOD ENT MODULO FALHA model setup MODEL SETUP MODELLO PROGRAM SETUP MODELLO RF channel setup RF CHANNEL SETUP CANAL RF PROGRAM SETUP CANAL DE RF scada address setup SCADA ADDRESS SETUP ADA LOC PROGRAM SETUP DESTINO SCADA output power fault setpoint OUT PWR FLT SETPOINT AJUSTE ALAMA POT AJUST FALHA...

Страница 17: ...C 75 ohms 38 9 45 75 MHz analog 36 or 44 MHz digital J6 Aural IF O P Aural IF signal output BNC 75 ohms 38 9 45 75 MHz analog 36 or 44 MHz digital J7 Aural IF I P Aural IF signal input BNC 75 ohms 38 9 45 75 MHz analog 36 or 44 MHz digital J8 RF O P RF signal output N 50 ohms 2 1 2 7 GHz J9 Combined IF O P Combined IF output BNC 75 ohms 38 9 45 75 MHz analog 36 or 44 MHz digital J10 IF CW I P IF c...

Страница 18: ...scription Remote forward power Remote reflected power Operate Ground typical Amplifier interlock return Amplifier interlock for ABS if used Remote overtemperature Amplifier fault Ground typical Power Supply Fault Encoding gating pulse to transmitter J12 D Connector J12 35 J12 37 J12 13 J12 36 J12 18 J12 33 J12 24 J12 30 J12 26 J12 17 ...

Страница 19: ...baseband video output of the SA scrambler to J2 video input of the transmitter 2 Connect visual IF output J4 of the transmitter to visual IF input of the SA scrambler 3 Connect visual IF input J5 of the transmitter to visual IF output of the SA scrambler 4 Connect aural IF output J6 of the transmitter to aural IF input of the SA scrambler 5 Connect aural IF input J7 of the transmitter to aural IF ...

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Страница 21: ...Scrambled Video Mode This will remove the Peak of Sync line and move Blanking upward towards the top of the screen Locate the GateLevel adjustment control on the front of the Power Amplifier Module Adjust the control slightly until the Blanking level moves back to its original position two centimeters down from the top of the screen Change the signal on the video generator toZero IRE No Burst This...

Страница 22: ...t is showing the display as indicated in the diagram Note Some models may display ADC TELECOMMUNICATIONS When the transmitter is in operate mode the STB menu appears In standby mode the OPR menu appears Press the NXT key after each menu to continue through the sequence that follows AXCERA V 2 5 LLC MODEL 5724 RF CHANNEL A1 STB STS PRV VERSION 2 5 SCADA ADDRESS 32 STB STS PRV If the SCADA option is...

Страница 23: ...UPPLY OK POWER SUPPLY FAULT PEAK VS AVG OK PK VS AVG FAULT If an external amplifier is present EXT AMP MODULE OK EXT AMP MODULE FAULT EXT AMP TEMP OK EXT AMP TEMP FAULT EXT PWR SUPPLY OK EXT PWR SUPPLY FAULT If a modulator is present MODULATOR VIDEO PRSNT MODULATOR VIDEO LOSS MODULATOR PLL LOCKED MODULATOR PLL FAULT MODULATOR INPUT OK MODULATOR INPUT FAULT TRANSMITTER STATUS IF PRESENT STB SYS PRV...

Страница 24: ...el 5722 5723 5724 5725 5726 5727 Select the proper region as follows Region 0 United States Region 1 South America RF channel setup menu SCADA setup menu Forward power fault setpoint menu REGION SETUP REGION 2 INC DEC PRV NXT MODEL SETUP MODEL 5722 INC DEC PRV NXT RF CHANNEL SETUP RF CHANNEL A1 INC DEC PRV NXT SCADA ADDRESS SETUP SCADA ADDRESS 32 INC DEC PRV NXT FWD PWR FLT SETPOINT POWER 28 INC D...

Страница 25: ... Turn the grip lock connectors on the module counterclockwise until the module releases Gently pull the module from the unit Slide the new module in place and make certain it connects to the backplane board If the new module does not slide in easily verify it is properly aligned in the nylon tracks Note Modules have assigned slots and will not fit properly in the incorrect slot Each module has a n...

Страница 26: ...lugged in Connections on the backplane also interface with other devices to establish remote control and command functions The schematic on the next page shows connections from the backplane board the rest of the backplane system BackplaneBoard front and rear view of the backplane board 22 ...

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Страница 28: ...ence of the 10 MHz reference The modulator can be used with an external 4 5MHz aural input instead of the normal bal anced and composite inputs The 4 5 MHz is applied to the transmitter using the composite audio input connector There are three jumpers on the modulator module that will need to be moved to convert to this input Conversion procedure Remove modulator module Move the jumper on J4 so th...

Страница 29: ...0010 1101 0000 1001 1000 1101 1011 38 9 2 3 line CF 2 3 line 0010 1101 0000 1001 1000 1110 1010 38 9 2 3 line CF 2 3 line 0010 1101 0000 1001 1000 1101 0110 Aural Carrier Inter Carrier IF SW3 SW4 SW5 SW11 4 5 MHz 45 75 and 45 75 10 KHz 0000 0111 1000 0000 5 5 MHz 45 75 and 45 75 10 KHz 1000 1000 1100 0000 38 9 and 38 9 1 2 line 0000 1011 0011 0000 38 9 1 3 line and 38 9 2 3 line 1000 0010 0101 000...

Страница 30: ...ers Audio Jumpers for Modulator Module 26 J2 J4 J5 J6 Preemphasis enable Floating Grounded compos ite gnd enabled 4 5 MHz subcarrier int ext internal enabled Ext 4 5 MHz subcarrier en abled 1 2 1 2 1 2 1 2 ...

Страница 31: ...Video Jumpers 27 J9 J11 Group delay enable Video loss fault enable 2 3 1 2 ...

Страница 32: ...w is a list of the connections on J1 which interface with other devices J1 1 J3 1 Power Amplifier Assembly 10 8 Volt Supply J1 2 J3 2 Power Amplifier Assembly 10 8 Volt Supply J1 3 J3 3 Power Amplifier Assembly 10 8 Volt Supply J1 4 J3 4 Power Amplifier Assembly 10 8 Volt Supply J1 5 J3 5 Power Amplifier Assembly 10 8 Volt Supply J1 6 J3 6 Power Amplifier Assembly Return J1 7 J3 7 Power Amplifier ...

Страница 33: ...Back view of the Power Supply Module 29 ...

Страница 34: ... systems using analog video modulation power is rated in terms of peak synch power Typically peak output power levels in systems using QAM can reach 4 times the average power For 64 and 256 QAM this 6dB back off is required to assure both a quasi error free bit error rate with forward error correction and a spectral regrowth low enough to prevent adjacent channel interference The amplifier also ha...

Страница 35: ...10W Analog 1 Section Bias Protection Board 20W PEP 5722 5W QAM 20W Analog 3 Section Bias Protection Board 40W PEP 5723 10W QAM 30W Analog Feed Forward 3 Section Bias Protection Board 50W PEP Linearization 5724 15W QAM 50W Analog Feed Forward 5 Section Bias Protection Board 70W PEP Linearization 31 ...

Страница 36: ...ts on the front of the module to provide a means of calibrating the detection circuitry There are two zero adjustments and two metering level adjustments used to calibrate the detector outputs for 1V at 100 power When the transmitter is used with an analog video scrambling system that suppresses the synchronizing pulse there are two additional potentiometers provided to realign the power detection...

Страница 37: ...flected Power Detection Level Point provides a DC voltage that is propor tional to the reflected output power of the transmitter 1V 100 ENV DET T P Envelope Detection Test Point provides a representation of the RF envelope used to align the gating pulse provided by certain video scrambling systems to properly reference the peak power level Jumpers 33 J2 Peak Average Detection peak 2 3 average 1 2 ...

Страница 38: ...LO Upconverter Module LO Sample SMA connector RF Output SMA connector Sample SMA connector 34 ...

Страница 39: ... There is an alarm generated if the phase locked loop is unlocked This alarm is displayed locally and is also sent to the control module in the transmitter to be displayed as a fault The bias voltage to the VCO is also available to be monitored at TP1 and also can be viewed an the transmitter front panel display Normal values for this voltage are 0 5 to 5V The 10 MHz reference is normally an exter...

Страница 40: ...C red LED indicates an ALC fault MUTE red LED indicates loss of video or IF when in ALC Mode Frequency Response Equalization ALC sets reference level of the ALC circuit MAG CUT IN MAG potentiometer to set linear equalization of system CUT IN sets reference power level above when the linearity equalization is active OUT IN Toggle switch that changes linearity equalization out or in MAN ALC Toggle s...

Страница 41: ...t signal is applied from the backplane connection to J1 32B the DIN connector located at the back of the module An input impedance transformer can be set to 50Ω or 75Ω using jumper J28 and J29 The input range is selected with the I P gain jumpers J8 J9 J10 and J11 37 Gain Jumper Setting Input Range HI Gain 22 to 12 dBm PEP MED Gain 17 to 7 dBm PEP LO Gain 12 to 2 dBm PEP ...

Страница 42: ...t contains the IF processing module and represents the level of RF output power generated from the PA stages of the unit The optional outer loop signal is a DC voltage generated from outside the unit and represents the level of RF output power generated from an external amplifier For both signals 1 volt equals 100 output power The output signal detection circuit selects one of these signals and ap...

Страница 43: ...ons are described in the table below 39 Mode Operation Manual the attenuator gain is controlled manually by The voltage to the attenuator can be adjusted directly by selecting the manual mode of operation with the toggle the manual gain poteniometer R149 on the front of the module switch SW2 on the front of the module ALC the output power of the system is controlled The desired level of output pow...

Страница 44: ... module Delay Equalizer 3 Selected for equalization of analog systems using adjacent or non adjacent selected with jumper J33 and J34 channel combiners 36 MHz Version Equalizer Circuit Operation Delay Equalizer 1 Selected for analog systems using adjacent combiners selected with jumper J35 and J36 Attenuation Equalizer 1 Always selected when delay equalizer 1 is selected selected with jumper J37 a...

Страница 45: ... front of the module The amount of equalization can be set through CUT IN and MAGNITUDE potentiometer on the front of the module as described below Output Gain Circuitry The IF output signal is applied to the backplane board connection J1 1B the DIN connector located at the rear of the module The output range is selected with O P gain jumper J26 and J27 A sample of the IF output signal is provided...

Страница 46: ...ing module Poteniometers Description Freq Resp Eq x4 Fine adjustment of the system frequency response ALC Sets the reference level of the ALC circuit MAN Adjusts transmitter gain when ALC disables MAG Produces linear equalization of the system Cut in Sets a reference power level above which the linearity equalization circuit is active Toggle Switches Description Lin Equ Places the linearity equali...

Страница 47: ...d power should be less than 10 EXT F External forward power should be set to approx 100 EXT R external reflected power should be less than 10 DO NOT make any adjustments to these pots they are set to a reference point at the factory NORM and AUX these are for future expansion and presently not used DIP SWITCH 1 EXT AMP place in on position when an external amplifier is used 2 INT MOD place in on p...

Страница 48: ...the module is installed ALC Voltage J19 18A J20 11C Analog input 0 10V Indicates the voltage applied to the pin attenuator in the ALC Mute IF Processor J19 19A J20 10C Discrete open Controls the muste feature in the IF collector output processpr Pulling this line low causes the IF pprocessor to force the pin attenuator into full attenuation Input Fault J19 21A J20 8C Discrete open A low level indi...

Страница 49: ...t Collector Input to the modulator Video Loss J19 1B J18 2A Discrete Open A low indicates video loss at the modulator Collector Input input Signal Name Backplane Backplane Signal Type Description P S Pin P S Good J19 2A J26 5 Discrete Open A low indicates that the 10 8 DC power is Collector Input operating properly P S Enable J19 3A J26 4 Discrete Open A low enables the 10 8 DC power supply Collec...

Страница 50: ... panel closure input Vss GND J19 10C J22 16 Ground Provides a return to the front panel board Vcc 5V J19 11C J22 15 5V Power Provides 5V to the front panel display logic VEE Contrast J19 12C J22 14 Control Voltage Controls the contrast of the LCD Output 0 to 5V RS J19 13C J22 13 Discrete TLL HMOS Indicates to the display is an instructino or Output data command is being sent High indocates the byt...

Страница 51: ...XT Refl Pwr Amp I P J19 13B J12 37 J13 20 Discrete open collector input indicates reflected power of the remote amplifier Standby CMD RCVR J19 14B J12 29 Discrete open collector input low indicates external RCVR requests xmtr go into standby mode Operate CMD RCVR J19 15B J12 29 Discrete open collector input low indicates external RCVR reguests xmtr go into operate mode RMT Operate Indicator J19 17...

Страница 52: ... bias supply There is a 1 1 relationship between this voltage and the 5V bias supply 48 Signal Name Backplane Backplane Signal Type Description U C Pin External Ref Indicator J19 4A J21 26C Discrete Open Collector Input High indicates prescence of a 10MHz reference Logic Enable J19 5A J21 25C Discrete CMOS Output Provides a load enable signal to PLL in the freq synthesizer chip A transition from l...

Страница 53: ...J2 14 J1 3 DB7 Data Bus J2 13 J1 4 DB6 Data Bus J2 12 J1 5 DB5 Data Bus J2 11 J1 6 DB4 Data Bus J2 10 J1 7 DB3 Data Bus J2 9 J1 8 DB2 Data Bus J2 8 J1 9 DB1 Data Bus J2 7 J1 10 DB0 Data Bus J2 6 J1 11 E J2 5 J1 12 R W read write J2 4 J1 13 RS J2 3 J1 14 Vee contrast J2 2 J1 15 Vcc 5V J2 1 J1 13 Vss ground None J1 17 S1 None J1 18 S2 None J1 19 S3 None J1 20 S4 None J1 21 S5 None J1 22 Key no conne...

Страница 54: ...e Analog Satellite Transmission Transmit Antenna Receive Antenna LNB 8770 MMDS Channel Combiner 5720 Transmitter with Modulator Analog Satellite IRD Scrambling Encryption Video Audio IF Video Audio RF Visual Aural 2 5 2 7 GHz Video Audio INDEX APPENDIX 50 ...

Страница 55: ...leshooting Typical troubleshooting of the 5700 series entails module replecement however some circumstances may require adjustments to the unit Refer to the charts that follow for troubleshooting guidance 51 ...

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Страница 60: ...turn Also be sure to include contact information Send ALL RMA items to the following address Axcera LLC 103 Freedom Drive P O Box 525 Lawrence PA 15055 0525 Telephone Technical Support Axcera currently provides free telephone technical support When calling be prepared to provide the following information Transmitter model number AND Serial number Status of front panel LED s are any red LED s on Ha...

Страница 61: ... is sent double boxed and enclosed in foam padding Use the same packing method when returning materials In the event original packing materials are not available call Axcera at 724 873 8100 to request proper shipping materials The necessary items will be sent out immediately Failure to properly pack any returned materials may result in damage to the equip ment Axcera is not responsible for damaged...

Страница 62: ...r or alteration Seller s exclusive liabil ity for any personal and or property damage including direct consequential or incidental caused by the breach of any or all warranties shall be limited to the following a repairing or replacing in Seller s sole discretion any defective parts free of charge F O B Seller s plant and or b crediting in Seller s sole discretion all or a portion of the purchase ...

Страница 63: ...reatning open the airway by tilting his head backwards Lift up his neck with one hand and push down on his forehead with the other This opens the airway Sometimes doing this will let the person breathe again by himself 3 If he is still not breathing begin rescue breathing Keep his head tilted backward Pinch nose shut Put your mouth tightly over his mouth Blow into his mouth once every five seconds...

Страница 64: ...el referenced to 1 watt FEC Forward Error Correction FM Frequency modulation Hz Hertz ICPM Incidental Carrier Phase Modulation I P Input IF Intermediate Frequency LED Light emitting diode LSB Lower Sideband MPEG Motion Pictures Expert Group O P Output PLL Phase Locked Loop PCB Printed circuit board QAM Quadrature Amplitude Modulation RF Radio Frequency SAW Surface Acoustic Wave SNR Signal to Noise...

Страница 65: ...Initial Turn On 18 Input Signal Detection Circuitry 38 Installation 4 INTRODUCTION 3 L LCD Display Connections 49 liquid crystal display 11 LO Upconverter Module 34 LO Upconverter Module Interface 48 Loop Thrus 15 M Material Return Procedure Exchanges 56 Modulator Module 24 Modulator Module Interface 45 Module Replacement 21 N Normal Operation 18 O Output Signal Detection Circuitry 38 P Pac Mono 1...

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