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Strata Operations Guide

-

14 -

TCU

TXU

HPU

!

NTSC

!

PAL

!

SDI

!

ASI

!

IF

RF OUT

RF/DC

Telemetry

Telemetry

IF or Baseband Signal

DC Simplex Powering

IN

Dummy Load

12 v to 48 v

DC

RS-232

1.84 MHz OOK Tone

12 v to 48 v

DC

RS-232

Typical Strata System Configuration Setup

Strata TX Powering Options and Cautions

Note the following recommended Strata system powering options and rules.

1.  TCU stand-alone powering: +12 volts to + 48 volts DC.
2.  TXU stand-alone powering: +12 volts to + 48 volts DC.
3.  TCU and TXU adjacent: +12 volts to + 48 volts DC. *
4.  TCU separated from TXU/HPU (TXU supplying power): +48 volts DC (for distances > 100 feet). **
5.  TCU separated from TXU/HPU (TCU supplying power): +24 volts (minimum). ***

Notes:

* When powering adjacent TCU/TXU configurations, apply power to both TCU and TXU units.
** Special rules apply for longer distance separation applications depending on coaxial cable type,

distance and whether an HPU is used.

*** Necessary to reduce current drain over IF coaxial cable – rec48 volts.

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Содержание Strata

Страница 1: ...Strata Operations Guide 1 Strata Transmitter Operations Guide Revision 3 0 May 2003 Microwave Radio Communications 101 Billerica Avenue Bldg 6 978 671 5700 N Billerica MA 01862 1256 www mrcbroadcast com ...

Страница 2: ...antenna The radiation limits at a distance of below 20cm exceeds the allowable safe exposure limits Beyond a distance of 20 cm you will notice that the usable antenna gain expressed in dBi increases logarithmically with distance spherically from the radiator In the case of an antenna with a concentrated beam such as a parabolic antenna the caution to exposure levels would be relative to antenna ga...

Страница 3: ...of the human body removed from the radiator by the corresponding distance in centimeters As can be observed the distances are marginal but notice should be observed never the less Radiation Limit for Portable Transmitter at 2WATT 33dBm MPE Based on 5dBi Omni Antenna mW cm 2 5dBi Omni 5 02099 2 007 Max Allowable Antenna Gain dBi 2 231555 1 513 1 25525 4 012 0 80336 5 95 0 557889 7 534 0 409877 8 87...

Страница 4: ...smitter System Architecture The primary system features are o Lightweight Modular Multi Unit Design o Analog Digital or Analog Digital Switchable o MPEG Encoding 4 2 0 4 2 2 o COFDM Modulation with Selectable Guard Interval o Digital Modulation for QPSK 16QAM and 64QAM o NTSC or PAL Modulation with Audio 4 mono or 2 stereo o Tripod Half Rack or Full Rack Mounts o Front Panel Remote Controlled o Ba...

Страница 5: ... COFDM or FMT options TXU Description Like the TCU component the TXU can accept a wide variety of signal formats but includes an RF up converter for use in transporting signals over a microwave radio link Figure 3 below shows the basic functions of the TXU MPEG COFDM FMT SIGNAL IN ASI MON ASI COFDM 70 MHZ 70 MHZ RF OUT SDI MPEG MPEG CV ASI Input FMT CV NTSC PAL SDI ASI IF Filter Telemetry SDI ASI ...

Страница 6: ...uits with the IF RF unit installed in a separate TXU Transmitter Unit housing This arrangement also allows the video modulation components TCU to be physically separated from the IF RF up converter by up to 600 feet Command and Control Power Supply The TCU and TXU Command and Control Power Supply modules contain external and internal communications circuitry as well as supplying the necessary syst...

Страница 7: ...ating the need for a TCU Note that the Strata TX design does not permit splitting digital and analog video modulator modules between a TCU and TXU A TCU configuration may also include a stand alone option where either or both MPEG COFDM and FMT modules may be used independent of the TXU This arrangement permits using a TCU equipped with analog and or digital video modulation modules for a variety ...

Страница 8: ...anel controls 1 When companion TXU or TCU devices are inter connected via coaxial cables an inter unit telemetry link is established This feature allows overall system operation and configuring to be accomplished from either the TCU or TXU devices if both are used For example the microwave transmitter may be keyed ON or OFF from either device 2 A configuration software tool Strata TX Configurator ...

Страница 9: ...pped is keyed ON or OFF by compressing and holding the front panel control switch for one second from any menu page The Strata TX system is transmitting when the front panel blue XMIT LED is illuminated When the menu display is inactive for more than 7 seconds the display will revert back to the main menu The following front panel control selections are available Set RF Channel Change Preset Prese...

Страница 10: ... utility Set Attenuation Value Transmitter Back Off Level Used to set the transmitter output power and linear operating point of the radio system Adjustable from 0 to 31 dB in 1 dB increments Push to select Note Maximum power output occurs with 0 dB of attenuation applied 75 Ohm Coax ON OFF Used to activate or de activate DC powering a TCU or TXU through the inter connecting IF coaxial cable Front...

Страница 11: ...IF Mode COFDM ASI In Mode Ext IF Input Audio 1 On Pre 4 83MHz Audio 2 On Flat 6 20MHz Audio 3 Off Pre 6 80MHz Audio 4 Off Pre 7 20MHz Vid Dev 4MHz Pre 525L In QPSK 8MHz FEC 1 2 GI 1 8 Color Bar Off Pilot Off MPEG Audio B Config Status Mode MPEG Output NTSC Vid In 4 2 0 Video Delay Normal MPEG Audio A Analog Stereo MPEG Audio B Analog Stereo Color Bar Off Monitor Menus A Function of IF Mode Selecti...

Страница 12: ...formats MPEG COFDM FMT SDI 525 625 ASI Various formats MPEG COFDM FMT NTSC PAL COFDM IF COFDM Various formats MPEG COFDM FMT NTSC PAL IF CV IF CV NTSC PAL IF MPEG COFDM FMT SDI 525 625 COFDM IF COFDM Various formats MPEG COFDM FMT ASI COFDM IF ASI or COFDM Various formats MPEG COFDM FMT IF IF IF IF Bypass Mode Notes ASI output possible when TCU used in stand alone MPEG only mode TXU Supported Sign...

Страница 13: ...put connector and the monitor output connector only operational for QPSK and 16 QAM Note This mode is currently not supported in the current software release RF Frequency Used to select an RF frequency from 1 99 GHz 2 50 GHz up to 5 decimal places Modulation Type Used to select each digital modulation mode for COFDM operation and DVB S mode when applicable QPSK 16 QAM 64 QAM Note 64 QAM modulation...

Страница 14: ...Unit expects a digital audio input stream Audio Notes A 48 KHz sampling is used for all audio 384 Kbits per stereo channel B When using Alteia IRD with Audio A ON and Audio B OFF Audio A is duplicated on Audio B output XLR connectors C When using Alteia IRD and 4 audio signals the preferred language setting for Audio B must differ from Audio A for decoding audio transport streams e g set for Spani...

Страница 15: ... change the currently selected frequency Remember the selection of frequency control modes i e frequency locked to presets or frequency unlocked to presets cannot be changed in the field Preparations The following preparations should be completed prior to attempting to configure the Strata TX radio system using a serial data connection Establish serial data connections to and from the radio system...

Страница 16: ...one powering 12 volts to 48 volts DC 2 TXU stand alone powering 12 volts to 48 volts DC 3 TCU and TXU adjacent 12 volts to 48 volts DC 4 TCU separated from TXU HPU TXU supplying power 48 volts DC for distances 100 feet 5 TCU separated from TXU HPU TCU supplying power 24 volts minimum Notes When powering adjacent TCU TXU configurations apply power to both TCU and TXU units Special rules apply for l...

Страница 17: ...ed DC voltages from interconnecting coaxial cables where necessary to protect externally connected equipment In the case of the TXU to HPU RF coaxial cable connection the center conductor will have DC voltages superimposed on the RF cable center conductor in order to power the HPU If the TXU RF output is connected directly to an antenna or test equipment be certain to disable the HPU On feature an...

Страница 18: ...ned not to use a TNC to BNC adapter on the TCU Signal Out jack to circumvent this protection feature Each Strata TX system that includes TXU and TCU modules is shipped with a short BNC to TNC coaxial cable assembly for interconnecting TXU and TCU modules For those system applications that require separating the TXU and TCU over longer distances users are advised to use a BNC barrel adapter on the ...

Страница 19: ...upplied with the software This software is designed to operate properly on Windows 32 bit operating systems e g Windows 98 NT 2000 or XP operating systems 2 Connect the PC serial port to the TCU or TXU per Figure 5 above Apply the appropriate DC power to the Strata TX radio system and operate the front panel power switch s to ON 3 Start the Strata Configurator application You should see the follow...

Страница 20: ...on is established with a Strata TX radio system you should see the main Customer screen display with all front panel controls activated as shown below 7 Next use the Load Settings From Radio function to retrieve the current Strata TX radio configuration It is recommended you store this configuration to a file using the Save Settings to File function especially when any modifications have been made...

Страница 21: ... this particular configuration in the Customer screen Description Information field in addition to a unique file name to aid in identifying this particular system configuration 12 When the current Strata TX system configuration action has been completed remove the serial data connection to the Strata TX system 13 Test and verify proper operation of the configured Strata system using the front pane...

Страница 22: ...nt of additional attenuation will apply when the associated preset is selected but may be temporarily changed using the front panel control Depending on the operating mode and the characteristics of the radio components added IF attenuation may not decrease RF output power on a 1 1 basis If accurate RF output power setting is required use an external RF power meter to ensure the desired amount of ...

Страница 23: ...ating Amphenol connector P N is MS3116F12 10S MPEG Board Function Circular Connector Wire Color XLR Analog Audio Input J11 1 return Right chan 1 A White 1 pin 3 J11 2 GND B Black 1 pin 1 J11 3 live Right chan 1 C Red 1 pin 2 J11 4 return Left chan 1 D White 2 pin 3 J11 5 GND B Black 2 pin 1 J11 6 live Left chan 1 E Red 2 pin 2 Analog Audio Input J12 1 return Right chan 2 F White 3 pin 3 J12 2 GND ...

Страница 24: ...to J13 digital audio The circular panel pin out will change depending on which existing audio connection is used See below for additional details Strata TX Digital and Analog Audio Options Introduction Due to the unique design of the Strata TX digital encoder circuit a number of digital and analog audio input options may be accommodated This brief memorandum describes the provisioning and use of t...

Страница 25: ...ion to being connected to the MPEG encoder analog audio inputs This option accommodates simultaneously distributing analog audio input signals to both FMT analog and MPEG encoder digital modules The current Strata TX design handles impedance matching in the FMT module by terminating FMT only or bridging FMT MPEG encoder audio input signals connected to the FMT module Depending on whether one or tw...

Страница 26: ...ut signals may be connected to an FMT module an MPEG encoder module or both 2 When connecting analog audio input signals to both FMT and MPEG encoder modules the FMT audio input circuit is optioned to bridge one or both audio channels to accommodate bridged connections to a co located MPEG encoder module 3 Analog audio input signals may be split between FMT and MPEG encoder modules by directly con...

Страница 27: ... is supported Note Since digital audio connections unlike analog audio connections share a common ground connection between two audio circuits digital audio wiring connections are able to accommodate twice the number of audio circuits over the same number of connecting wires leads Please refer to the MPEG encoder wiring pinout connections shown below for the differences between analog and digital ...

Страница 28: ... due to the limited number of pin connections on the circular panel connector use of digital audio requires audio connection wiring for one analog audio channel Therefore whenever one of the circular panel audio connections is connected to the MPEG encoder digital audio input only one analog channel may be connected to either or both FMT and MPEG encoder modules The various audio connection option...

Страница 29: ...for these units at 28 volts DC is approximately 1 ampere each Please see the power cable connector pin out sketch below for connection details A B C D E F G H 12 to 48 volts DC Common return Strata TCU TXU Power Cable Connector Pin out End View HPU The HPU device is powered via the center conductor of the coaxial cable connection to the companion TXU early version The current drain for this unit a...

Страница 30: ...Strata Operations Guide 28 TCU Board Inter connection Diagram ...

Страница 31: ...Strata Operations Guide 29 TXU Board Inter connection Diagram ...

Страница 32: ... J8 COAX IN MONITOR COAX OUT C_VID IF_ON D_VID ASI x 2 J13 J11 J12 J7 907386 COFDM MPEG Encoder Digital Audio Ch 1 Analog Audio Ch 2 Analog Audio RS 232 Data IF Out Audio 3 Audio 1 TP3 Video In Audio 4 Audio 2 Audio 3 4 Audio 1 2 Audio 1 2 Audio 3 4 907320 FMT 907346 Baseband Combiner TCU Video and IF Coaxial Cable Interconnection Details ...

Страница 33: ...INE E031 TXU PS 7 VOLT LINE E032 TXU PS 11 VOLT LINE E033 TXU PS TEMPERATURE E034 TXU PS IF COAX CURRENT E035 TXU PS IF COAX VOLTAGE E036 TXU PS IF COAX WATTAGE E037 TXU PS RF COAX CURRENT E038 TXU PS RF COAX VOLTAGE E039 TXU PS RF COAX WATTAGE EP3A TXU PS CKT CURRENT EP3B TXU PS CKT VOLTAGE E0EC TXU PS CKT WATTAGE E03D TXU PS DC BUS E03E TCU PS 48 VOLT LINE E040 TCU PS 5 5 VOLT LINE E041 TCU PS T...

Страница 34: ...PS 48 VOLT LINE E060 HPU PS 5 5 VOLT LINE E061 HPU PS 11 VOLT LINE E062 HPU PS TEMPERATURE E063 HPU PS COAX CURRENT E064 HPU PS COAX VOLT E065 HPU PS COAX WATTAGE E066 HPU PS CKT CURRENT E067 HPU PS CKT VOLTAGE E068 HPU PS CKT WATTAGE E069 HPU PS DC BUS E06A COFDM ENCODER COMM ERROR E080 FMT VIDEO PLL UNLOCK E0E0 FMT AUDIO1 PLL UNLOCK E0E1 FMT AUDIO2 PLL UNLOCK E0E2 FMT AUDIO3 PLL UNLOCK E0E3 FMT ...

Страница 35: ... and H in the audio circular panel connector corresponding to J12 pins 1 2 and 3 are connected to J7 pins 1 2 and 3 per the pinout information shown below Note that analog audio channel 2 Right Side channel connections are removed and not available when the Wayside data channel option is used Top View of 907386 COFDM MPEG Encoder PWB J7 J12 7 1 2 3 RS232 Wayside Data J7 1 RS232TX from encoder 2 RS...

Страница 36: ...Strata Operations Guide 34 ...

Страница 37: ...IN 70MHz IF Output J5 50 Ohm Composite Video Input J6 Terminated at 75 Ohm RS232 Data and RS485 Control J7 1 RS232TX from encoder 2 RS232RX to encoder 3 GND 4 RS485 TX 5 RS485 TX 6 RS485 RX 7 RS485 RX SDI Input J8 75 Ohm ASI out J9 J10 75 Ohm Analog Audio Ch1 J11 1 R 2 GND 3 R 4 L 5 GND 6 L Analog Audio Ch2 J12 1 R 2 GND 3 R 4 L 5 GND 6 L Digital Audio Ch1 Ch2 J13 1 Ch2 2 GND 3 Ch2 4 Ch1 5 GND 6 C...

Страница 38: ... the encoder circuit and a connecting data terminal PC Most applications do not use this capability 1 2 3 J7 TD RD SG Encoder PWB Circular Panel Audio Connector F H G DB 9 DTE 3 2 5 Null Modem Cable PC DTE 3 2 5 Wayside Data Traffic DB 9 Note J7 pin 1 is nearest to long edge of COFDM MPEG PWB End of Strata TX Operations Guide Document ...

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