A711L - Dallas Avionics
Contents
1. ACCESS A Audio System A711L 2 1 5 OPTION SELECTOR amp LEVEL CONTROL This single push button switch and level control allows the crew to monitor either CST Cross Side Tone Nav system or Aux audio or Music as determined at manufacture CST allows monitoring of outgoing transmissions on another panel only one where you are NOT already monitoring the radios in question This specific input has soft muting during other ICS and TX functions The switch has an alternate action push in to activate the audio push again to have the switch return to the out position off 22777777 PD 1 PD 2 PD 3 PD 4 PD 5 CST KEY LIVE Rx Ics COM1 COM2 PD 1 PD 2 PD 3 PD 4 PD 5 CST ACCESS A Audio System A711L FIGURE 2 4A A711L OPTION SELECTOR amp LEVEL CONTROL Technisonic Industries Copyright 1996 97 2010 2011 BY TIL RIGHTS RESERVED Page 2 4 ACCESS A A711 L Series Operating Instructions O9RE417 2 1 6 TX or TRANSCEIVER SELECTORS COM1 COM2 PD 1 PD 2 PD 3 PD 4 PD 5 lt MONITOR LEVEL COM1 2 1 2 PD 3 PD 4 5 CST TRANSMIT 7 oP RX GICS COM1 COM2 1 PD 2 PD 3 PD 4 PD 5 y m SSS TRANSMIT Technisonic ae ACCESS A Audio System A711L FIGURE 2 5 A711L TX SELECTORS The setting of the TX SELECTOR switches determines which Transceiver will transmit the activated microphone audi2. rattling around the cabin They have to be un plugged when not in use or connected via drop cord that provides either PTT or continuous mic connection This is VERY important and must be considered during installation and operation both The industry default is to use a drop cord of some type but other methods are possible just be certain this issue has been resolved to the satisfaction of the flight crew BEFORE flight Technisonic Industries ltd Copyright 1996 97 2010 2011 BY TiL ALL RIGHTS RESERVED Page 2 9 ACCESS A A711 L Series Operating Instructions O9RE417 2 3 CHANGING OVERLAY LIGHTING amp RADIO LEGENDS The legends on the A711L front panels and the overlay color and lighting type can all be easily changed in the field to suit special requirements The entire lighted overlay is changed by removing three screws as illustrated below Remove the knobs use an Allen Hex key to undo the set screws and the overlay assembly will pull off A small polarized square plug on the rear mates with the lighting assembly and can be pulled off to allow the overlay to be completely removed and exchanged See the service manual for more details The legend insert is adhesive and can be removed by lifting a corner free with a sharp X acto knife blade and then genily pulling the entire Lexan strip free Remove the backing from a new legend strip with the desired legends line it up evenly and press it into place on the overlay recess The
3. e The corresponding RX audio of any TX selection is made AUTOMATICALLY whenever a TX button is depressed This function is often referred to as Auto RX select e The knobs at the right side of the unit adjust ICS VOLUME intercom RX VOLUME and the trigger or VOX LEVEL of the INTERCOM as well as its exact mode of operation Live Keyed or VOX 2 1 1 INTERCOM KEYING MODE AND SENSITIVITY CONTROL KEY E lt e 4 KEY LIVE Technisonic ACCESS A Audio System A711L FIGURE 2 2 A711L ICS INTERCOM CONTROLS This adjustment selects how the intercom will activate In the VOX Voice Activated mode the audio produced by any of the microphones will break the squelch of the intercom and the audio will be routed through the system The threshold audio level required to break the squelch is adjusted by this knob Turning the knob more clockwise makes the system more sensitive to incoming mic audio A fully clockwise setting on the knob will leave the intercom on at all times giving LIVE or HOT MIC operation When set fully counter clockwise in the switch detent position the intercom is in the KEYED mode will only produce audio when the intercom PTT line is keyed While the co pilot pilot and passengers have individual mic VOX gates 3 in total they are controlled from a common front panel control gating reduces the amount of unwanted noise when the intercom is triggered and make
4. or corporations For warranty registration please complete the on line Warranty Registration Form found at www til ca Technisonic Industries Copyright 1996 97 2010 2011 BY TIL RIGHTS RESERVED Page 2 11
5. to the passengers and only the tape and ICS audio remain MONITOR LEVEL x a lt 4 _ 4 COM1 COM2 PD 1 PD 2 PD 3 KEY LIVE RX ICS COM1 COM2 1 2 PD 3 Technisonic ae ACCESS A Audio System A71 Annunciators FIGURE 2 6 A711L STATUS LEDs amp EMERGENCY SWITCH Technisonic Industries ltd Copyright 1996 97 2010 2011 BY TiL ALL RIGHTS RESERVED Page 2 6 ACCESS A A711 L Series Operating Instructions O9RE417 A711L PA CONTROLS The A711L control differs slightly from the other A710 A711 series in that a single button transfer is incorporated for shifting from any preset TX mode to PA mode and back again This allows simulcast settings to remain undisturbed and provides a very fast way of shifting TX modes in flight PA operation has some hazards for the flight crew however To guard against accidental PA operatio a green LED to the left of the yellow PA button flashes while in the PA Mode rate and intensity are field adjustable and an optional audible tick can be programmed to come on to warn users they will be talking on the PA system not a radio This is a safety feature to prevent accidental transmission over the PA system which can have significant repercussions This function is push on IN PA MODE push off control OUT TX MODE If the PA system supports it additional features such as remote PA ON OFF and side tone input are also provided MONITOR LEVEL OROS PA
6. xu u mt na a eee 2 8 2 2 3 2 a uu uu S 2 9 2 2 4 Alerling FuuBehonS u u u um m u R nu a OD a u 2 9 2 2 5 Speqker Audig u asua atap oie 2 9 2 2 6 Passenger Headset Considerations 2 9 2 3 Changing Overlay Lighting amp Radio Legends 2 10 2 4 Produc Warranty u uuu 2 11 Technisonic Industries Itd Copyright 1996 97 2010 2011 BY TiL ALL RIGHTS RESERVED iv ACCESS A A711 L Series Operation Manual O9RE417 LIST OF TABLES 1 1 A711L General 1 4 LIST OF ILLUSTRATIONS 1 1 A711L Audio Control General 1 3 1 2 A711L Audio Control General 1 4 2 1 Front Panel Operators Switches Controls 2 1 2 2 CoNo OON 2 2 2 3 l evoryol ime GoOnr6S u gt s u x u Q u U au iss BD 2 3 2 4 S eleGlorSs amp Level uuu mnsa luna alee 2 4 2 4A Oplion S
7. 9 20 and 21 Induced Signal Susceptibility RF Susceptibility and Emission of RF Energy respectively used shield terminations at both ends of the cable Should RF susceptibility pose a problem in a particular installation the installer may wish to try terminating shields at both ends of the cable further if this does not produce satisfactory results then double shielding may be required Technisonic Industries Ltd Copyright 1996 1997 2010 2011 BY TiL ALL RIGHTS RESERVED Page 1 11 ACCESS A A711 L Series Operating Instructions O9RE417 SECTION 2 OPERATING INSTRUCTIONS 2 1 FRONT PANEL OPERATORS SWITCHES AND CONTROLS This section explains the operation of the A711L ACCESS A Audio Controls and how to use the system in a typical aircraft environment All normal user controls are on the front panel of the unit and are either variable rotating controls or selectable push button switches The exact radio legends on the face of the A711L may vary from the illustration shown due to customer specifications and the final legend insert that is installed for the specific aircraft installation A full view of the controls is given in Figure 2 1 All rotary controls are illuminated for night flight MONITOR LEVEL See See a lt te Se A e Jo 1 2 PD 1 PD 2 PD 3 4 csr KEY LIVE RX GICS 7 COM1 2 PD 1 PD 2 PD 3 PD 4 Technisonic 7 ACCESS A Audio System A711L FIGURE 2 1 A711L FRONT PANE
8. ACCESS A AUDIO CONTROL SYSTEM MODEL 711 L Series MONITOR LEVEL COM1 COM2 PD 1 2 PD 3 PD 4 KEY LIVE RX ICS oN COM1 COM2 PD 1 PD 2 PD 3 PD 4 Operating Instructions TiL Document No O9RE417 Rev N C January 2011 Technisonic Industries Limited 240 Traders Boulevard Mississauga Ontario 142 1W7 Tel 905 890 2113 Fax 905 890 5338 www til ca ACCESS A A711 L Series Operation Manual O9RE417 REVISIONS j Revision Page Description Date Approved Technisonic Industries Itd Copyright 1996 97 2010 2011 BY TiL ALL RIGHTS RESERVED ACCESS A A711 L Series Operation Manual O9RE417 WI cauTION This unit contains static sensitive devices Wear a grounded wrist strap and work at a static safe workstation when handling internal printed circuit boards WARRANTY INFORMATION The Model A711L Audio Controller is under warranty for one year from date of purchase Failed units caused by defective parts or workmanship should be returned for warranty service to Technisonic Industries Limited 240 Traders Boulevard Mississauga Ontario L4Z 1W7 Tel 905 890 2113 Fax 905 890 5338 V TRADEMARK INFORMATION 55 ACCESS D ACCESS R amp ACCESS F all trademarks of Technisonic Industries Ltd All rights reserved Technisonic Industries Itd Copyright 1996 97 2010 2011 BY TiL ALL RIGHTS RESERVED Hi ACCESS A A711 L Ser
9. CCESS A A711 L Series Operating Instructions O9RE417 2 1 7 EMERGENCY SWITCH OPERATION amp STATUS LEDs The operation of the A711L control can be changed from NORMAL to EMERGENCY operation in two different ways First if DC power fails to the unit the internal auto emergency function 15 enabled this transfers the unit to a passive emergency mode to enable critical communication to continue for the pilot This auto switch over is indicated by all STATUS LEDs going black including the one over the emergency switch Second the PILOT EMERGENCY SWITCH can be depressed alternate action which will force this transfer In this mode the STATUS LED above the switch changes from green to deep orange and the button itself turns orange NVG panels go black In either case the PILOT or primary user of the control is connected directly to the radio that has been selected by the TX SELECTOR switch Boom Mic Transmit operates normally as does receive but the headset power level is reduced to the passive un amplified radio level All internal electronics are bypassed for the pilot which permits some level of operation even with massive equipment failure or loss of power When the pilot emergency switch is used to shift to emergency operation the other users of the control are essentially un affected and continue to operate on the ICS amp music circuit This mode may also be used as a Pilot Isolate function as all radio audio is disabled
10. Forest Service contractor furnished avionics and can be used in a dual control installation in conjunction with a TiL FM airborne transceiver to comply with all US Forest Service Contract Requirements These products are also compliant with TSO C50c The units were tested according to RTCA DO 214 and RTCA DO 160C applicable categories with the exception of the RF Susceptibility Test which is based upon the requirements of RTCA DO 160A and the Lightning Induced Transient Susceptibility Test which is not called out under RTCA DO 170 MODEL VARIATION The A711L comes two basic lighting configurations all with 28VDC panel lighting a regular version and an NVG optimized panel lighting version Operationally the two are identical but the NVG panel is set to a lower intensity range and has a different optical wavelength The color of the regular solid state backlighting is White the NVG is Verde centered at a 505nm wavelength Panel front color is matte black and the lighted knobs can be in several formats The default knob style is all black except the two ICS knobs VOX and level which are gray for easy identification Units may also be supplied with or without internal 3 tone alerting w ground seeking keylines See the ACCESS A price list for model numbers and availability or different versions All A711L part numbers begin 961072 followed by a dash number The most common variations are summarized below 5All Gray Knob
11. IN TX OUT I gt COM1 1 PD 2 PD 3 PD 4 COM1 2 PD 1 2 3 e Technisonic u 5 Audio System 7111 FIGURE 2 7 A711L PA SWITCH amp ANNUNCIATOR Technisonic Industries ltd Copyright 1996 97 2010 2011 BY TIL ALL RIGHTS RESERVED Page 2 7 ACCESS A A711 L Series Operating Instructions O9RE417 2 2 SPECIAL SIGNAL CONSIDERATIONS There are several special signals and lines related the A711L which require careful installation planning and understanding by the flight crew 2 2 1 DIRECT AUDIO CONNECTIONS The A711L has two different un switched direct audio inputs One is routed directly to the Pilot s headset output via a resistive pad This is used when an existing airframe threat alerting system must be tied directly to the pilots headset This function is active when in either the normal or emergency mode and its volume is a function of the external generating source and the headset impedance This should be tested if implemented to insure adequate headset level is possible in the specific application Note that this connection may be unusable in the LOW IMPEDANCE 8 20 ohm headset mode if the alerting system cannot deliver enough level Excessive loading back through this connection may reduce headset volume or adversely affect the pilot s headset so be certain this function is correctly implemented The second direct input is un switched only and is mixed with the regular
12. L OPERATOR S SWITCHES AND CONTROLS e The top row of variable controls sets the level of the incoming RX or RECEIVER audio and the special function at the right such as CST Cross Side Tone NAV or Aux Music input signals To the far right is the PA MODE switch Yellow which shifts Transmit operation from Radio to PA system operation and a flashing green LED to the left of this button indicates the PA Mode is active e The middle row of round push buttons selects the RX or RECEIVER audio to be sent to the crew headsets This is an ON OFF function e The bottom row of square and round push buttons selects the TX or TRANSCEIVER to be used when transmitting The left square buttons are normally for AM Com transceivers the right round buttons are for tactical radios This shape change is to aid tactile identification without looking at the panel The far right hand square button is to select EMERGENCY Mode operation for the designated Pilot position Technisonic Industries ltd Copyright 1996 97 2010 2011 BY TiL ALL RIGHTS RESERVED Page 2 1 ACCESS A A711 L Series Operating Instructions O9RE417 e Any combination of RX sources may be selected at one time for system monitoring purposes Multiple TX destinations may also be selected by pressing in two or more buttons simultaneously to set up simulcast operation Pressing any TX button in automatically resets any previous selection but RX selections are independent push on push off switches
13. RX audio bus It will be partially muted during TX operation and must be used carefully to insure correct system operation This signal should NOT be wired in the harness if not needed as it will serve merely as a source of noise if left stowed in the aircraft wiring It cannot be switched off and will be lost during emergency operation as only the 7 transceivers are routed to the emergency headset bus 2 2 2 SUM NODE This line is used to expand the RX input bus of the A711L control and allows many supplemental receivers to be attached with high isolation from other signals Use of either the A770 or A775 eyebrow expansion units is required to tie to this line Signals directed to this input will be muted during TX operation just as for any other RX input This can be used to add switched or variable NAV aids and other sources to the system control area Technisonic Industries ltd Copyright 1996 97 2010 2011 BY TiL ALL RIGHTS RESERVED Page 2 8 ACCESS A A711 L Series Operating Instructions O9RE417 2 2 3 ALERTING The A711L supports the installation of optional tone alerting The alerting tones function as follows Alerting tones are activated by a ground trigger at the corresponding input pin and play once the alert line is triggered The 3 DH alert is timed and the 2 alert Low Rotor over rides tone 1 Engine Failure The tone level frequency pulse rate and time are all field adjustable for the best match to exist
14. adhesive will cure fully in 48 hours Be sure any bubbles are pressed out and that all edges are firmly attached with no exposed lighted edges MONITOR LEVEL COM1 COM2 PD 1 PD 2 PD 3 PD 4 PD 5 CST COM1 COM2 PD 1 PD 2 PD 3 PD 4 PD 5 EMRG RU COM1 COM2 PD 1 PD 2 PD 3 PD 4 PD 5 CST COM1 COM2 PD 1 PD 2 PD 3 PD 4 PD 5 EMRG TRANSMIT Technisonic U ACCESS A Audio System A711L FIGURE 2 8 OVERLAY amp ADHESIVE LEGEND INSERT MONITOR LEVEL COM1 COM1 TRANSMIT x p L 1 ACCESS A Audio System A711L FIGURE 2 9 REMOVING THE ENTIRE OVERLAY ASSEMBLY Remove the 3 screws indicated after removing all knobs Technisonic Industries Copyright 1996 97 2010 2011 BY TIL ALL RIGHTS RESERVED Page 2 10 ACCESS A A711 L Series Operating Instructions 9 417 2 4 Product Warranty Terms Technisonic Industries Limited 240 Traders Blvd Mississauga ON Canada 147 1W7 Tel 905 890 2113 Fax 905 890 5338 IMPORTANT PRODUCT WARRANTY All communication equipment manufactured by Technisonic Industries Limited is warranted to be free of defects in Material or Workmanship under normal use for a period of one year from Date of Purchase by the end user Warranty will only apply to equipment installed by a factory approved and or authorized facility in accordance with Technisonic published installation instructions Equipment falling under the following is not covered by warranty e
15. ansmit and receive audio for the pilot on the selected communications channel This switch also provides an implicit pilot ISOLATION function and allows the pilot to isolate himself from the co pilot and the ICS system so that he may access different communications from the other users supported by this panel in essence an emergency link to the selected transceiver only In the NORMAL position switch turns black amp LED green the pilot s audio is provided as selected by all of the panel controls and is part of the ICS system Separate RX and ICS volume controls are provided on the panel along with an ICS VOX threshold control These units can also provide ICS support and boom mic TX support for a complete aircraft crew including the pilot co pilot and up to 4 6 additional passengers Technisonic Industries Ltd Copyright 1996 1997 2010 2011 BY TiL ALL RIGHTS RESERVED Page 1 6 ACCESS A 711 L Series Operation Manual O9RE417 1 3 1 4 PURPOSE OF THE EQUIPMENT The A711L 55 Audio Controls are designed to provide centralized audio management and control within an airborne communications environment This includes radio and transceiver selection intercom airframe threat alerting and crew management These units have been packaged to minimize size and weight characteristics and are ideally suited for helicopter installations or any other Dzus rail panel location A711L meets of the current requirements of US
16. e maximum volume level and counter clockwise the minimum The ICS volume can be set to zero but has the internal capability to be preset to a low minimum value if desired ICS audio is normally muted during TX operations but may be adjusted internally for a user specified muting depth or the muting function may be disabled by jumper selection The Receive or RX MONITOR LEVEL control is the larger A A A Q outer bottom knob is color coded to the individual RX Z level controls The Intercom or ICS control is the smaller inner top knob and is color coded to the VOX control Technisonic ACCESS A Audio System A711L FIGURE 2 3 A711L LEVEL VOLUME CONTROLS RX or RECEIVE VOLUME CONTROL The RX LEVEL knob controls the volume level of all the system receivers Fully clockwise is the maximum volume level and counter clockwise the minimum RX audio is derived from both the receivers such as Nav aids and the transceivers Comms etc in the system The RX audio level cannot be set to Zero and has an internal minimum level setting RX audio is normally partially muted during TX operations and is adjustable internally to the desired level for TX sidetone Note that sidetone must come from the radio itself Technisonic Industries ltd Copyright 1996 97 2010 2011 BY TiL ALL RIGHTS RESERVED Page 2 3 ACCESS A A711 L Series Operating Inst
17. electo or amp Level u u u a u Aaa alas n 2 4 2 5 VAS CISC IOS 2 5 2 6 Status LEDs amp Emergency Switch 2 6 2 7 PA Switch amp Annunciatlor a arar 2 7 2 8 Overlay amp Legend 2 10 2 9 Removing the Overlay 2 10 Technisonic Industries Itd Copyright 1996 97 2010 2011 BY TiL ALL RIGHTS RESERVED ACCESS A 711 L Series Operation Manual O9RE417 SECTION 1 GENERAL DESCRIPTION 1 1 INTRODUCTION This publication provides operating and installation information on the Model A711 L series ACCESS A Audio Controls manufactured by Technisonic Industries Limited For convenience it is referred to as the A711L in the manual This unit is designed to provide high performance cockpit audio control in high noise installations The unit is plug and pin compatible with the ACCESS A family format to allow fleet wide compatibility with all ACCESS A installations with the following limitations The A711L has its extra functions assigned to the Alerting connector and can also have 3 tone alerting as an internal option These connections are slightly different than a standard A710 711 unit and to prevent any airframe problems the alerting connector has different locks on the A711L t
18. graded at upper and lower limits DC Current 1 A 6 users 150 speaker 98 Backlighting Input Standard 28 Vdc 200 mA Max TECHNICAL CHARACTERISTICS Input Impedance Normal Mode any RX input 2K 1 5K Q approx Input Impedance Emergency Mode Com1 7 RX Inputs 50 Q Headset Z typical Headset Channel Output Impedance 8 or 80 Q depending on settings H S Audio Power Output at least 332 mW primary user into 150 Q with 6 headsets 150 each connected H S Audio Power Output at least 500 mW pilot into 8 20 Q H S Audio Power Output at least 1500 mW total into 6 users 2150 Speaker Power Output at least 2 5 W into 8 Q Audio distortion Speaker or H S less than 2 THD 1kHz at total rated output Audio Frequency Response ICS within 3 dB from 300 Hz to 6000 Hz Audio Frequency Response Rx amp NAV within 3 dB from 300 Hz to 3000 Hz Hum and Noise Level better than 60 dB below 500 mW Input Muting when mike is keyed adjustable Input to Input isolation better than 70 dB between inputs Deselected input isolation better than 65 dB CST Input Output Levels 100 150mV into 150 typical for 100mW H S power ENVIRONMENTAL Temperature operating 45 to 70 Celsius Temperature survival non operating 55 to 85 Celsius Humidity 95 Non condensing 12 g any axis Altitude 25 000 feet Technisonic Industries Ltd Copyright 1996 1997 2010 2011 BY TiL ALL RIGHTS RESERVED Page 1 9 ACCESS A 711 L Series O
19. ies Operation Manual O9RE417 TABLE OF CONTENTS TiL DOCUMENT O9RE417 SECTION 1 GENERAL DESCRIPTION 1 1 ies 1 1 1 2 ayu mu uma maa akay masa n hay a 1 1 1 3 Purpose OF EQUIDIMGML aN E a N a 1 2 1 4 Model uuu a A e 1 2 1 5 T eehineal SUMMAN uuu e 1 4 1 6 System 1 5 SECTION 2 OPERATION 2 1 Front Panel Operator s Switches amp Controls 2 1 2 1 1 Intercom Keying Mode amp Sensitivity Control 2 2 2 1 2 ICS or Intercom Volume 2 3 2 1 3 or Receive Volume 2 3 2 1 4 or Receive Selectors amp Level Controls 2 4 2 1 5 Option Selector amp Level 2 4 2 1 6 LXOr Transcelv er Sc sae u area ewe 2 5 2 1 7 Emergency Switch Operation amp Status LEDSs 2 6 2 1 8 PA CONOIS 2 7 2 2 Special Signal GOriSIderalloneSu u uuu 2 8 2 2 1 Direct Audio CONNECTIONS a 2 8 2 2 2 Sum NOJ uy t
20. in Rx mode at the high frequency end The phenomenon of music appearing at the headset of the Second Station Panel SSP or unit at which the crosstalk is measured for station to station crosstalk considerations is a limitation of the A711L and for which crosstalk at high frequencies 6000 Hz and greater can fall below 65 dB of attenuation However music for most intents and purposes may be considered an optional feature which may be turned off without a negative impact on the essential functioning of the access units Further valid station to station crosstalk measurements were quoted in respect of a half power level at the headset at the First Station Panel FSP or unit from which the crosstalk originates as opposed to a half power level at the speaker output of the FSP because it is envisioned in the latter scenario that the substantial speaker level which will also necessitate very large signal levels at the FSP headset will have an impact on the listener at the SSP whether a crosstalk signal appears at the SSP 5 headset or not When multiple transceivers are selected for simulcast operation they are bound together at the Station output and thus are also bound together for other stations as well defeating cross talk measurements All measurements are based on single transceiver TX selection Technisonic Industries Ltd Copyright 1996 1997 2010 2011 BY TiL ALL RIGHTS RESERVED Page 1 10 ACCESS A 711 L Series Operatio
21. ing Sonalerts in the cockpit and user preferences Always confirm alerting is working correctly and is at an acceptable level before completing any installation 2 2 4 TONE ALERTING FUNCTIONS Alert Function Corresponding Format Input Pin Engine Failure 1 steady tone Repeat continuously Pin 15 Alert 1 Low Rotor RPM 2 pulsing tone Repeat continuously over Pin 14 Alert 2 rides tone 1 Decision Height Timed 2 3 sec typical Pin 1 Alert 2 225 AUDIO The A711L has a speaker channel that may be used to provide cabin monitoring of signals when parked on the ramp during troubleshooting or for in flight use if cabin noise permits This is an optional connection and does not have to be used The speaker level is driven by the same controls as the headset level but it does not provide any microphone related audio to avoid feedback such as ICS The specific audio sources routed to the speaker channel may be programmed with jumpers internally and it may be used as a music only feed for a passenger cabin area if desired Alerting is NOT routed to the speaker channel 2 226 PASSENGER HEADSET CONSIDERATIONS A711L has the ability to passenger ICS in both PTT or VOX modes but you must consider this Loose passenger headsets lying in the cabin MUST be properly accounted for the headsets are wired in directly the loose headsets will be a continual source of intercom noise
22. n Manual O9RE417 1 6 4 Isolation Limitations When in Pilot Isolation Mode the pilot microphone for ICS operation is rendered inactive Consequently neither co pilot nor passengers can receive pilot intercom transmissions while the latter is in Isolation mode 1 6 5 Standard Settings Utilised Throughout Testing Pilot Headset Settings utilized throughout testing was for the standard 150 ohms impedance headset The PAL options utilized were applicable to the following configuration Where Pilot or Co pilot transmitted on the UUT ICS communication was possible only in the instance where the signal emanated from other unit s daisy chained to the UUT via the ICS tie line In this event the UUT would receive the ICS transmissions from the other unit s It was not possible for the UUT which transmitted to export ICS communication to another unit nor was it possible for intra ICS communication to occur between users connected to UUT i e Option 1 not implemented 1 6 6 Transmission Priority Where Pilot and Co pilot transmit simultaneously the Pilot transmissions take precedence over those of the Co pilot Co pilot transmissions in this case would be rendered inactive 1 6 7 Induced Signal Susceptibility RF Susceptibility and RF Emission The wiring connections called out in the Installation and Operating Instructions chapter 2 describes shield terminations for minimum ground loop noise The test harnesses used for 160 sections 1
23. o and which receiver the system will monitor independent of the additional RX switch settings The buttons have an interlocking action and pressing one button will automatically de select any other that is already activated If two buttons are depressed at the same time simulcast operation on two radios is enabled The buttons change from black to white com radios or blue mission radios when activated and a corresponding STATUS LED illuminates green above the button The LEDs turn yellow when the specific transmitter is activated by the A710 711 and all the LEDs will extinguish if all transmitter buttons are returned out to the off black position and no transmitter has been selected This indicates that no valid TX mode has been selected by the crew On NVG panels the status LEDs turn brighter green not yellow during transmit operation In the EMERGENCY MODE the radio s selected by this group of switches is sent directly to the pilot s headset bypassing all of the 8 internal power amplifiers and other electronics Note whatever is bound together by one panel for simulcast is bound together for all as the switching takes place at the output of the control Both TX and RX data will be tied For this reason the AM Com radios should not ever be bound into a simulcast operation to prevent accidental or unintended ATC traffic Technisonic Industries ltd Copyright 1996 97 2010 2011 BY TiL ALL RIGHTS RESERVED Page 2 5 A
24. o make it impossible to connect it to an airframe wired for default A710 711 functions If an existing installation had no alerting connector wiring then it can be used without difficulty but note the installation issues regarding annunciator dimming The A711L comes ONLY in a 28V panel backlight configuration 1 2 DESCRIPTION This high power audio controller delivers at least 332 mW of audio into 150 ohms at less than 2 total distortion to the pilot and co pilot positions simultaneously It can deliver lower output powers into 300 and 600 ohm headsets The pilot s position may also be internally strapped to interface with 8 20 ohm headsets at the same power level Push button transmit selector switches allow immediate selection of any of the seven supported aircraft communications transceivers and a PA amplifiers while additional push button audio input selector switches allow selection of any or all of the supported transceiver s receive audio lines In addition a switched and adjustable input is provided for special functions such as Cross Sidetone CST Nav or a Music feed ACCESS A systems have auto RX switching when a transmitter is selected to reduce pilot workload and avoid operational problems The A711L has front panel selectable and adjustable VOX LIVE or KEYED intercom ICS functions An EMERGENCY mode push button switch switch and LED turn red orange when activated provides straight through or fail passive tr
25. peration Manual O9RE417 1 6 1 6 1 1 6 2 1 6 3 SYSTEM LIMITATIONS A summary of the relevant system limitations is given below Power Limitations With Standard Set up which consists of six headsets connected a power output of not less than 332 mW is delivered per headset as represented by 150 ohms provided that the Direct Alert Input is terminated in not less than 600 ohms and that nominal input voltages are applied at the applicable channel inputs Nominal microphone input 100 MV ms Nominal Communications Navigational Input 5 5 Vims Frequency Response Limitations In accordance with the provisions made RTCA DO 214 Sections 2 8 1 1 5 1 the communications transmit out and receiver channels communications and navigational possess an effective bandwidth of 300 Hz 3000 Hz with a maximum amplitude variation of 3 dB within the frequency range Crosstalk Limitations To ensure that the crosstalk specifications are in accordance with the applicable sections of DO 214 it is essential that 1 manufacturer s maximum microphone input voltage of 4 7 dBu not be exceeded in order to avoid jeopardising input to microphone output crosstalk results particularly at the low frequency end 2 in the instance where only two access units are daisy chained via their ICS tie lines a resistor of not greater than 600 ohms must be maintained across the ICS tie line in order to avoid jeopardising station to station crosstalk results
26. quipment that has been repaired or altered in any way as to affect performance equipment that has been subject to improper installation equipment that has been used for purposes other than intended equipment that has been involved in any accident fire flood immersion or subject to any other abuse Expressly excluded from this warranty are changes or charges relating to the removal and re installation of equipment from the aircraft Technisonic will repair or replace at Technisonic s discretion any defective transceiver or audio system or part thereof found to be faulty during the Warranty Period Faulty equipment must be returned to Technisonic or its authorized Warranty Depot with transportation charges prepaid Repaired or replacement equipment will be returned to the customer with collect freight charges If the failure of a transceiver occurs within the first 30 days of service Technisonic will return the repaired or replacement equipment prepaid Technisonic reserves the right to make changes in design or additions to or improvements in its products without obligation to install such additions and improvements in equipment previously manufactured This Warranty is in lieu of any and all other warranties expressed or implied including any warranty of merchantability or fitness and of all other obligations or liabilities on the part of Technisonic This Warranty shall not be transferable or assignable to any other persons firms
27. ructions O9RE417 2 1 4 RECEIVE SELECTORS amp LEVEL CONTROLS These 7 push button RX SELECTOR switches allow the crew to monitor any combination of the Receivers in the airframe system independent of the setting of the transceiver selectors The RX SELECTORS have an alternate action push in to activate the audio push again to have the switch return to the out position and off Any number or combination of RX switches may be used at the same time Note that the corresponding RX audio is always automatically selected by a TX SELECTOR and the matching RX switch does not have to be selected as well The corresponding level control for each RX line is located above the switch and the individual colors of the RX pushbuttons match the colors of the corresponding TX pushbutton switches These controls normally go to approximately 2 5 level at the minimum setting not off but can be strapped internally to go fully off if required Selecting the input off is normally done by the setting of the RX monitor switch not the level control MONITOR LEVEL ae PIA COM1 2 PD 1 PD 2 PD 3 PD 4 PD 5 KEY 024 RX G ICS COM2 PD 1 Pp 2 PD 3 POs 4 PES 5 TRANSMIT 5 J 24 4 440 pre c Ju COM1 2 PD 1 PD 2 PD 3 PD 4 PD 5 CST KEY LIVE 2 RX ICS 1 COM2 PD 1 PD 2 PD 3 PD 4 PD 5 2 sonic TRANSMIT
28. s 6 Black w Gray ICSNVG fo 7 Gray ICS NVG L O 8 All Black Knobs NVG 9 Gray Knobs L O Default configurations shown shaded Technisonic Industries Ltd Copyright 1996 1997 2010 2011 BY TiL ALL RIGHTS RESERVED Page 1 7 ACCESS A 711 L Series Operation Manual O9RE417 2 513 6 069 Tama Posi Po POS Pos Pos COMI 4 POs Poss FIGURE 1 1 A711L ACCESS A AUDIO CONTROLLER GENERAL VIEW Technisonic Industries Ltd Copyright 1996 1997 2010 2011 BY TiL ALL RIGHTS RESERVED Page 1 8 ACCESS A 711 L Series Operation Manual O9RE417 15 TECHNICAL SUMMARY A summary of the relevant electrical operational mechanical and physical characteristics of the control panels are given in Table 1 1 General Specifications TABLE 1 1 711 L Series GENERAL SPECIFICATIONS MODEL A711 L Series ACCESS A Audio Controller PHYSICAL CHARACTERISTICS WY TIA GIN 3 48 5 75 inches FG asa aus Qusa 2 625 inches xa sus 6 07 inches Weight including 3 0 Ibs 1 36 Kg Mounting standard Dzus 4 fasteners POWER SOURCE REQUIREMENTS DC Voltage MIN TYPICAL MAX 20 0V 28 V 32 2V System performance will be de
29. s intercom communication more intelligible as a result The passengers may have their VOX threshold offset by an internal adjustment PAX VOX to accommodate differing headset types or ambient noise conditions and may also use drop cords With only a single A711L control best operation of all ICS functions is obtained when the microphones are all of the same type or have very similar characteristics Headsets with significantly different microphones or earpiece efficiencies make it difficult to achieve satisfactory control adjustments for all users unless they also have individual level controls Good quality headsets such as David Clark Telex or Bose with noise reducing amplified dynamic microphones and individual headset volume controls give the most effective and user adjustable performance and minimal system difficulties Use of clone headsets that visually resemble these higher quality units but have much poorer electrical and acoustic performance is strongly discouraged as the entire system operation will suffer This is especially true under high noise conditions or continuous rough use Marginal headsets will compromise the ship s entire audio system Technisonic Industries Copyright 1996 97 2010 2011 BY TIL RIGHTS RESERVED Page 2 2 ACCESS A A711 L Series Operating Instructions O9RE417 ICS or INTERCOM VOLUME CONTROL The ICS LEVEL knob controls the intercom volume level for all users Fully clockwise is th
Download Pdf Manuals
Related Search