KRT2 Operation and Installation Manual
Contents
1. TA 23 LE MERI IPS Er TT 24 do bransmatter Re E 25 ZI Se Ios eer e E 27 Bde SD OUCAL SIGS Um 2 Geer 28 NEE GN ER E ui 29 4 9 1 ERASE Erasing the Favourites List 29 X92 Re MAUNA CANS oosissameids E E E eceteeeseas 30 Klee ein 30 NSU le a ME 32 or Ane PAA Oil SEO TER ETE SS 0 2 Telecomtmunicauou RE 32 Co COPS Ol EE 32 6 4 Unpacking and Inspecting the Foupment 33 4 of 54 Doc Nr ae lus User amp Installation manual BE a 025001008 D sd s e VHF Communication Transceiver Revision 9 6 Sept 2013 E D e E 33 6 0 VGC Trial onec DOS ESE E E E E 34 6 6 1 Mi crophone Connection eeesessssseeeersssssssseerrrssssssseceressssssssetersssssssseereesssssseees 34 66 2 Eatphone Connection sis cesscccsecscaansseesatcqntessanacesnatieged sidni iniiai esinen Eiin ist anai 35 Oo Ea mnd 10 0 E E E 35 O7 Finaly Audio Sep EE 36 UA WE de ee 36 DU Formo ET 36 Co ne e et 36 MER er a O A 37 SL EE TENE UU mE 37 6 8 2 Connector Pin Configuration esssseoeeeesssssseeeessssssscereerrsssssssseterrssssssseerersssssseees 37 OP AS Aa D T E 38 5508 MEN PO O e EE 38 EE CN EE TE 39 6 8 3 3 Motor glider SING ageet Eeer 40 ConA Gidor dial eee 41 6 8 4 Wiring for dynamic microphones sessssssoeeesssssssssseeerrsssssssserersssssssseerresssssseees 42 0S3 Conneccion SUPPO seser ec sacsneatacusotasciasananassdiusecmesenaces 42 Cu a E2. 4 4 2 SQ Squelch Pressing the AUD button once enables the turning knob to change the squelch level values SGnn Value range 01 10 The Squelch setting is depending on several factors 18 of 54 Doc Nr User amp Installation manual SEET VHF Communication Transceiver Revision 9 6 KRT2 amp KRT 2A For Software gt 5 00 Sept 2013 For engine driven airplanes an initial setting of 05 08 is recommended Gliders may need a lower setting The lower the Squelch level value the higher is the input sensitivity A high sensitivity setting is susceptible to noise from other sources like ignition strobe lights etc Standard SQ level is 05 08 Higher setting will suppress weaker input signals 01 Squelch off 02 for long range Squelch does not influence the intercom system 4 4 3 VOX Intercom Voice Trigger Level Setting Pressing the AUD button twice enables the turning knob to change the voice level which triggers the intercom The intercom voice trigger level must be set to such a value which prevents that normal cockpit noise being heard in the earphones The intercom system should only be activated when talking at a normal voice level into the microphone The higher the trigger level the louder the voice must be in order to trigger the intercom system VOX on condition is indicated by flag v VOXnn Range 01 10 4 4 4 Manual Intercom In case of extreme cockpit noise or uncompensated microphone
3. The antenna must be approved in respect to aircraft type and installation location The antenna specifications can only be fulfilled when properly installed 6 9 2 Installation Recommendation The manufactures instructions have to be observed The metallic contact between airplane surface and antenna ground must be very good Non metallic airplanes must have installed a metal sheet foil or mesh of at least 80x80 cm inside the fuselage as electric counterweight In order to avoid interference the distance between a COM an NAV antenna or between a COM and another COM antenna should be as large as possible A distance of 2 meters normally is sufficient The antenna must be installed vertically and as far as possible away from parts like propeller landing gear rudder etc that may influence propagation of the radio signals In gliders the internal antenna provided by the airplane manufacturer is to be used The HF antenna cable may not be part of other cable sets like power supply or microphone It must not be placed together with any other COM NAV or transponder antenna cable THIS IS MOST IMPORTANT 43 of 54 Doc Nr User amp Installation manual GE VHF Communication Transceiver Revision 9 6 BRENNEN uM mma Sept 2013 6 10 Microphone general The correct setting of the MIC and VOX values is of great importance for the Intercom system see 3 4 3 VOX Intercom Voice Trigger Level and 3 4 10 MIC Setup T
4. e Select the Standby frequency to be monitored in addition to in use frequency e With the AUD button and turning knob set SQnn to 02 or higher e With the DUAL button activate the DUAL watch function e When there is no reception on both the Active frequency and the otandby frequency the receiver scans both frequencies 5 times per second e When scanning the Active frequency always has priority e Deactivate the DUAL watch function with the DUAL or FREQ or MEMORY buttons 4 6 Transmitter Operation 25 of 54 I Doc Nr PWS User amp Installation manual Do E ONE VHF Communication Transceiver MAIN TENAN MAINTENANCE GMBH Revision 9 6 KRT2 amp KRT 2A For Software gt 5 00 Sept 2013 The unit transmits on the active frequency upper line as long as a PTT press to talk switch is pressed DUAL AUD e e CUL AD e MEMORY A F Y Y Transmission Heception TX indicates normal transmitter operation In the lower left corner of the display the carrier modulation is dynamically displayed It corresponds to the side tone which is not available on gliders when no earphones are in use In order to avoid the blocking of the frequency by unintentional long transmissions stuck microphone the transmitter is switched off after two minutes and the display changes from TX to Je To resume transmission the PPT switch first must be released and then be pressed again While transmitting the external audio input
5. Pressing the AUD button six times enables the turning knob to set the display brightness Display lighting current drain at maximum brightness is only 10mA Maximum brightness is glare free even in darkness and can be used continuously Indication of battery voltage VDC DUAL AUD DIMnn Range 01 10 4 4 9 CON Display Contrast Pressing the AUD button seven times enables the turning knob to set the display contrast CONnn Range 01 10 20 of 54 I Doc Nr PHS User amp Installation manual a ORE VHF Communication Transceiver NTENAN MAINTENANCE GMBH Revision 9 6 KRT2 amp KRT 2A For Software gt 5 00 Sept 2013 4 4 10 SIT Side tone Pressing the AUD button eight times enables the turning knob to set the side tone volume SITnn Range 0 9 4 4 11 MIC Setup This mode is for service only normal operation is not possible in this mode Each of the two microphone input channels can be configured individually which enables different microphone types to be used A maximum of two microphones of same type may be connected to each microphone input channel see Microphone Connection 5 6 1 The MIC Setup is the last item of the Audio menu and can be accessed by pressing the AUD button nine times DUAL ae lt Zi L MIc vt a H AGC B pali ti AAL Mic dyn MEMORY A FREQ M By pressing the DUAL button repeatedly L R and AUTO can be selected L R means left ri
6. Batt GND Batt Plus Remote control KRT 2 Glider Dual V3b 41 of 54 Doc Nr User amp Installation manual Geer VHF Communication Transceiver Revision 9 6 KRT2 amp KRT 2A For Software gt 5 00 Sept 2013 6 8 4 Wiring for dynamic microphones Special attention is required for the wiring for dynamic microphones Because of the required high gain any mistake on the ground wiring leads to interferences and feed backs The basic rules are Never join power current grounds with the microphone ground The cleanest GND is the case of the radio Put the battery GND to the case and the microphone GND to the pins 1 amp 9 Alternatively it could be swabbed where the battery GND is soldered to pin 1 amp 9 and microphone GND to the case 6 8 5 Connection support In order to connect shields of all cables at a single point and to avoid ground loops an adapter board as shown is recommended 158 J9 The adapter board is placed between the connector pin rows and soldered to the BAT plus pins 8 15 and GND pins 1 and frame Pin 9 microphone GND is provided on two pads for shielding Further information printed on the board serves to connect all cables to its corresponding pins 42 of 54 Doc Nr User amp Installation manual GE VHF Communication Transceiver Revision 9 6 BRENNEN uM mma Sept 2013 6 9 Antenna 6 9 1 Antenna Selection A 50 Ohms impedance VHF COM antenna is required
7. Doc Nr User amp Installation manual GE VHF Communication Transceiver MAINTENANCE GMBH e BEEN ilh Ss or oottware gt VHF Communication Transceiver A DUAL AUD 7 ON COM 2 gt ven MEMORY A FREQ P N 100 0001 060 Operation and Installation Manual 1 of 54 lus User amp Installation manual Dh inn a H z3 pru VHF Communication Transceiver MAINTENANCE GMBH Revision 9 6 BENE uM uM Sept 2013 2 of 54 Doc Nr User amp Installation manual GE VHF Communication Transceiver Revision 9 6 BRENNEN uM md Sept 2013 Record of Revisions Revision Date Subject 1 OB Juni 2010 Firstissue 2 20 Sep 2010 Revision Stecker Redaktionelle nderungen 4 04Mai2012 Cable harness correction 5 16 Mai 2012 Software advantage for battery indication error reports 6 19 Aug 2012 Hints for mic Installation amp intercom 8 Dec 2012 Dynamic Microphone GND wiing 9 March 2013 Additional drawing clarify microphone GND E a 24 o 00 S O 95 Simplication of memory handling a 3 2332 23z Service Bulletins have to be inserted in the manual and entered in the table Date Date SB Number Issued Inserted Unit overview Item No Product Overview Basic Version 2 of 54 d Doc Nr Eege User amp Installation manual SE VHF Communication Transceiver Revisi
8. Standby frequency station Displayed when frequency designator and designator is stored in the favourite list 11 of 54 Doc Nr User amp Installation manual SE VHF Communication Transceiver Revision 9 6 KRT2 amp KRT 2A For Software gt 5 00 Sept 2013 Display Meaning Remark DUAL Active frequency AND DUAL function is Standby Frequency are deactivated by frequency monitored simultaneously change or by pressing the DUAL button again 03 Favourite list index When frequency and MEMORY 0 99 designator are stored at this index they are displayed 125 100 upper Active frequency 134 825 ower Standby frequency The pointer indicates what Arrow is positioned in the turning knob will change correspondence to the VOL SQ VOX etc button pressed Standby frequenc AUD or FREQ AT Supply voltage is low Battery low or 10 5V Battery Generator faulty Er ANT Bad antenna match ave otatus of certain Audio a AUX Input active menu functions v VOX active e external Intercom switch active UJ Er PLL Internal error no transmission Return the transceiver for maintenance Er ADC Internal error Heturn the transceiver for maintenance Er FPA Internal error unit not usable Return the transceiver for maintenance Er I2C Internal error unit not usable Return the transceiver for maintenance Er si5b3 Internal error unit not usable Return the transceiver for maintenance Er D10
9. been input latest however after 5 seconds Remote control unit errors do not interfere with the KRI2 transceiver operation Data transmission between the transceiver KRT2 and the remote control unit KRT2 RC is checked once every minute A rm the upper right 30 of 54 VHF Communication Transceiver Revisi Sept 2013 n He plus User amp Installation manual corner is displayed when there is no malfunction The KRT2 RC can also operate the KRT2 in a fully stand alone mode such the KRT2 can be installed anywhere in the aircraft and be operated remotely by the KRT2C This feature will be useful in tandem aircraft or aircrafts with very little space behind the instrument panel 31 of 54 Doc Nr User amp Installation manual SE ch VHF Communication Transceiver Revision 9 6 Sept 2013 6 Installation 6 1 Installation Hints The following hints should be considered for installation A certified maintenance shop should perform the wiring or as required by local national regulations For the wiring diagram refer to chapter 5 7 3 6 2 Telecommunication Data The following data may be required for the radio station licence Emission Des 6kKOOASE f r 25khz channel spacing 5kOOA3E f r 8 33kHz channel spacing 6 3 Scope of delivery KRT2 KRT2 VHF Transceiver ZUB2 3 pcs Mounting screw KRT2 for panels up to 3mm Operation and Installation Manual 32 of 54 Doc Nr User amp Install
10. is highlighted and can kno i be changed with the FREQ button RM 11i12 12 0 Frequency ranges are 1xx nnn FRANK RD UL as aoa lee 1nn nxx VERAS Press the FREQ button once or several times until the desired frequency range is highlighted When the pointer is not next to the Standby Frequency window it will be repositioned with the first pressing of the FREQ button Mai Exchanges the Active and Standby frequencies When the Exchange button was not pressed the Standby frequency display will return to its normal appearance after 20 seconds 4 3 2 Frequency Selection from the Favourites List By pressing and operating the turning knob a specific favourite list position can be accessed xx xx index O 99 When frequency and station designator have been defined they will be displayed in the Standby and station designator windows 14 of 54 I Doc Nr Zb User amp Installation manual CIN VHF Communication Transceiver Revision 9 6 Sept 2013 The favourite list designators can be sorted in alphabetic order see 3 3 3 A Mai Exchanges the Active and Standby frequencies The selection procedure can be terminated with either the AUD or FREQ buttons Without pressing any of these buttons the unit will return to its normal operating mode after 20 seconds 4 3 3 Storing and Editing Favourites Any displayed Standby Frequency can be given a designator and both can be stored together as favourites in the f
11. will be turned off automatically The microphone selection is dependant upon the pre setting of the T Xm activation The differential speaker output will be turned off to prevent an audio feedback to the microphone The speaker also will be disabled if the intercom VOX is active The output for the headset will carry the side tone 26 of 54 T User amp Installation manual GE Lo PIUS ica i de f ZN Aido VHF Communication Transceiver Sept 2013 4 7 Self test monitor Operating in the background continuously there is a back ground test system The field for battery status amp error see Control Elements Overview is used to indicate warnings and in the case of hardware failure different error reports be displayed there The warnings are BAT low battery voltage becomes active lt 10 5V At transmission A match bad antenna match or antenna defective Also while transmitting the TX flag left top will change to Te if transmission time has exceed gt 2 minutes All other reports starting with Er Indicating a major hardware failure and consequently the radio has to be returned to the factory 4 7 1 Optical side tone Especially when used in gliders where headsets are generally not worn and thus no side tone is heard it is very helpful to see if the microphone is working The KRT 2 solves this problem At left lower side there is a modulation indicator that depicts the voice level When there is no modula
12. 0916 833 11809 3 D 1181000 833 118105 etc etc etc etc m 49 of 54 Doc Nr User amp Installation manual SEN VHF Communication Transceiver Revision 9 6 Sept 2013 8 2 Technical Data GENERAL Compliance ED 23C Class 4 6 Standards RTCA DO 186B Class 4 ED 23C Class C D E H1 2 RTCA DO 186B Class H1 2 RTCA DO 178B ED 12B Level D ETSO 2C169a Standards EUROCAE ED 23C RTCA DO 160E RTCA DO 178B ED Level D Height 68mm Width 62mm Depth 144mm plus rear panel plugs 60mm Weight 0 36 kg Mounting panel mounting cut out 57 mm Temperature Ranges Operation 20 C to 55 C Storage 55 C to 85 C 6G operation RTCA DO 160F ENV CAT Power Supply 9 VDC to 33VDC test 12VDC e Transmitter 2 0 A typ e Receiver 0 1A e Illumination 0 02A e Audio Power amp Up to 1A emergency operation 9 VDC Power Consumption Standby 1W Transmit 30 W Frequency Range 118 000 136 995 MHz Fuse Jexternal fuse required 4 A slow blow 50 of 54 Doc Nr User amp Installation manual SEN VHF Communication Transceiver KRT2 amp KRT 2A Revision 9 6 For Software gt 5 00 Sept 2013 Compass Safe Distance 30 cm TRANSMITTER POWER OUTPUT 6 W nominal 4 W minimal HARMONIC DISTORTION 10 96 at 70 96 modulation SIDETONE OUTPUT gt 0 5W an 3000 head set output MICROPHONE INPUTS 2 x standard 50mV 2V into 1000 or 2 x dynamic HARMONIC CONTENT gt
13. 60dBc MODULATION FIDELITY deviation lt 6 dB von 350 2500Hz CARRIER NOISE LEVEL gt 35dB at 70 Modulation index UNWANTED FREQUENCY 1kHz at m 0 1kHz MODULATION DUIY CYCLE 2 minutes on 4 minutes off automatic turn off after 2 minutes continuous transmitter operation RECEIVER SENSITIVITY 105 dBm gt 6 dB S NIN m 30 1 kHz BANDWIDTH 25 KHZ 6 dB bandwidth gt 8 0 kHz BANDWIDTH 8 33 KHZ 6 dB bandwidth gt 2 78 kHz SELECTIVITY 40 dB bandwidth lt 17 0 kHz 60 dB bandwidth lt 7 37 kHz channel spacing 8 33 KHZ SPEAKER OUTPUT 210 W into 4 Q Deviation of NF output 6 dB AGC CHARACTERISTIC from 10 uV to 10 mV SQUELCH Automatic Squelch adjustable SPUHIOUS RESPONSES 80 dB 51 of 54 Doc Nr User amp Installation manual SEN VHF Communication Transceiver Revision 9 6 NENNEN uM mma Sept 2013 DISTORTION 350 2500Hz lt 25 at rated power 85 33dBm lt 10 at 10dB below rated power 70 33dBm 52 of 54 Doc Nr e lus User amp Installation manual Vo M a4 L z3 pu VHF Communication Transceiver KRT2 amp KRT 2A Revision 9 6 For Software gt 5 00 Sept 2013 53 of 54
14. 9 6 BRENNEN CRTA amp KRT 2A a Sept 2013 Introduction of e 2 Standard Microphone Inputs e Auxiliary Audio Input e DUAL Watch Function 3 of 54 Doc Nr ae lus User amp Installation manual BE a 025001008 D js KL VHF Communication Transceiver 1 Hevision 9 6 KRT2 amp KRT 2A For Software gt 5 00 Sept 2013 TABLE OF CONTENTS GENERAL 6 UE te 6 IB MP DIAC mms 7 IS MEE Sie e UUm 8 Ld KRI Transceiver properues cc 11s0sssaccatsecudessassacenvsebneeseessacead mededeasosaansneiitaadertesdaeatmadedeaseas 8 Installation limitation 00 nn nn ri air eaaieeeeaaneesaaeegeas 9 S09 0 MEME Cee ee ee ee 9 o enke BICMISNIS TE 9 I DD a E E 11 OPERATION 13 MMe MC UU EMT 13 B2 ON FORF Te 13 LS PE E E mom 13 Zo dCuectbreguenci ele e 14 4 3 2 Frequency Selection from the Favourites Lut 14 43 9 torme and Editino PAVOULIVES EE 15 LP AUD e CO NER TU MMMTMT 18 zs FS GIRL e E 18 Lm GELS Se EE 18 4 4 3 VOX Intercom Voice Trigger Level Seng 19 e NM T T O a e DOES 19 AAS TXm PTT Switch e EE 20 ZORRO INT Jnterconi e cessere E E Ta 20 4 4 7 EXT External Audio Input Volume eeeeeeeeeeeeeeeeeeenm mee 20 4 4 8 DIM Display Brightness Batt voltage esses 20 AED e TE Display e E 20 A E Te e E 21 e E E DR LE 2 RE UU T TT 21
15. If R is not used it should be loaded or grounded and not be connected to open wires 34 of 54 plus User amp Installation manual Dest ions E Li 23 pu VHF Communication Transceiver MAINTENANCE GMBH KRT Revision 9 6 Sept 2013 Copilot R Pilot L Microphone R Micriphone L Klinke H KlinkeM Klinke H Speaker dynamic microphones GND must go direct to connector Toggle Dynamic mic Headsets for motorgliders Because the 8V supply voltage is switched off when dynamic microphones are used during glider flight the second copilot headset microphone is disabled A maximum of two microphones of same type may be connected to each microphone input channel 6 6 2Earphone Connection oeveral earphones of same type can be connected in parallel The total impedance should not be less than 60 Ohms 6 6 3External Audio Input Audio alarms or even music can be made available via the external audio input When this input is not used it must be connected to ground in order to avoid noise PIN5 must be connected to Battery minus GND 35 of 54 Doc Nr User amp Installation manual DEE VHF Communication Transceiver Revision 9 6 BRENNEN uM mma Sept 2013 6 7 Finally Audio Setup This is an overview for a correct audio set up depending on the usage Ground the unused MIC R input if unused 6 7 1 For gliders Press button AUD 3x for VOX Set to VOX 10 turn off Press button AUD 4x for T
16. Internal error reception corrupt Return the transceiver for maintenance Key Block Internal error unit not usable Return the transceiver for maintenance 12 of 54 Doc Nr lus User amp Installation manual E AN a4 Li z3 pu VHF Communication Transceiver NTENANCE GMBH Revision 9 6 KRT2 amp KRT 2A For Software gt 5 00 Sept 2013 4 OPERATION 4 1 General In the normal operating mode in which the turning knob always is connected to the volume VOL The normal operating mode can be left by pressing the AUD FREQ or MEMORY button When not in the normal mode and there is no pilot action for more than 10 seconds the unit returns to the normal mode 4 2 ON OFF Switching ON OFF switching is by the self locking push switch After power up the following display will be displayed Device name KRT2 Software Version e g V2 0 KRT2 Software Version e g V2 0 The unit then starts in the normal operating mode using and displaying the data last used 4 3 Frequency Selection There are two different frequency selection methods e Direct Input e Selection from the favourite list index 0 99 13 of 54 I Doc Nr lus User amp Installation manual n d ln VHF Communication Transceiver MAINTENANCE GMBH Revision 9 6 Sept 2013 4 3 1Direct Frequency Selection DUAL AUD The Standby Frequency is set with the X Xx f turning knob in 3 different ranges The ON 3 ey el CEA Um selected range
17. Nr lus User amp Installation manual E AN a4 Li z3 VHF Communication Transceiver MAINTENANCE GMBH Revision 9 6 KRT2 amp KRT 2A For Software gt 5 00 Sept 2013 6 8 3 Wiring Diagram 6 8 3 1 Full connection Binder snap in O9 9748 OO O3 amp 09 9747 00 03 1 3 GND 2 signal L 7 LY Dynamic Microfon Binder snap in g 09 9748 00 03 amp O9 9747 00 03 Dynamic Microfon 1 3 GND 2 signal Motor glider Microfon L 3 EN n I I Sai EL Headset Left PTT L 19 Headset 14 Microfon R 6 fo EE SE SRE A entia p Standard 1 Microfon Right TM Headset Right j white Man Heroum a2 I 50cm blue Intercon l l Send if manual intercom is not used 30cm black yellow Remote Kl LSP 4 8 Speaker if required RT2 EE 5 RSR Eer a P ege T E Ext NF 5 ee Aus Audio in RX Remote 13 e TX Remote 2 green b PTT Right REE x brown Des H PTT Left Batt Plus um did Batt Minus CO pr Fuse us E M bann N Mic GND Batt Minus Power PTT L TX Remote STX 2 E 9 to 28V Microphone L CL Jr 12V PTT R 3 LSP DINNER ntercom Sis lite Biss pd Ext NF i4 ILS JCS EC Microphone R 7 8 9 S Headset KD CT I rj RSR LSP d Batt Plus Ons front view male CA 8 The view onto the correct side of the connectors is very confusing SS For orientati
18. R 43 oI AN Ce EET mm 43 69 2 Installation Recommendation eege eer 43 6 10 Microphone general iuceceoseoqumessatc00 de 25 03 0 A EEE EAE 44 6 11 Eer geet 44 6 12 viridia U PTHT sess 45 6 13 e 46 6 14 ciu M 46 NM DEN CN 46 EE Tustolldton Die C10 E 47 MEM NLS ele 48 JL Penode ENN Te 48 SC WER 48 D ME C UD 48 o ANNEX Q 49 o L Freguency Chanmnel sSchedule ono ao p PREDA TES UF ETHER Pbup NOU Deb tede ER borpa QU ustedes URUPELU Und Ud 49 Ca S voles Mic 50 5 of 54 Bd fF User amp Installation manual S Sm ALES BARES e Gi Ee VHF Communication Transceiver Revisi 6 Sept 2013 1 GENERAL This manual contains information about the physical mechanical and electrical properties as well as a description for the operation and installation of the VHF airborne transceiver KRT2 1 1 Symbols WARNING Non compliance may cause personnel injury due to radiation or fire CAUTION Non compliance may cause damage or incorrect operation of the transceiver INFORMATION 6 of 54 M DE lus User amp Installation manual m PP E E Y p a VHF Communication Transceiver Revisi 6 Sept 2013 1 2 Abbreviations Abb Description Definition Push to Talk Transmitter activat
19. Xm Set to TXm Press button AUD 6x for EXT Set to EXT 00 turn off Press button AUD 10x for MIC Set to MIC Level 11 6 7 2 For motor gliders For change mode motoring amp headset gliding amp dynamic microphone Press button AUD 3x for VOX Set to VOX 3 on condition at motoring Press button AUD 4x for TXm Set to TXm Press button AUD 6x for EXT Set to EXT 00 turn off or on condition Press button AUD 10x for MIC Set MIC L to level 5 or as required Set MC R as required or to 1 if unused select AUTO and leave menu 6 7 3 F r Motor planes Press button AUD 3x for VOX Set to VOX 3 turn off Press button AUD 4x for TXm Set to TXm or on condition Press button AUD 6x for EXT Set to EXT 00 turn off or on condition Press button AUD 10x for MIC Set to MIC Level 3 or as required oet MC R as required or to 1 if unused 36 of 54 Doc Nr User amp Installation manual DEE VHF Communication Transceiver Revision 9 6 KRT2 amp KRT 2A For Software gt 5 00 Sept 2013 6 8 Wiring 6 8 1Wire Gauges Supply lines Power GND AWG18 0 96 mm Control lines AWG22 0 38 mm All wires must be aviation certified 6 8 2Connector Pin Configuration Batt Plus LSP Headset Microfon R RX PC Ext NF Intercom LSP PTT R Microfon L PTT L TX PC OOOO 900 Micro GND OVO SC Batt Minus GND lf manual intercom is not used pin 12 should be grounded 37 of 54 Doc
20. ation manual DEE VHF Communication Transceiver Revision 9 6 BRENNEN uM mma Sept 2013 6 4 Unpacking and Inspecting the Equipment Carefully unpack the equipment Damages due to transportation must immediately be reported to the shipping company Save the shipping container and all packing material to substantiate your claim For storage or reshipment the original packing material should be used 6 5 Mounting e n cooperation with the maintenance shop mounting details are specified The maintenance shop can manufacture and install all cables that may be required e Avoid installing the unit in the vicinity of heat sources Sufficient air circulation is required e There must be sufficient space for cables and connectors e Avoid sharp bends and wiring close to control cables e Cable length must be such that connectors are accessible for repair e The wiring to the transceiver must be installed such that water droplets formed by condensation will not run into the connector Hemove the turning knob in order to install the transceiver o Remove the turning knob cap with an appropriate tool o Loosen the screw and remove the turning knob o Install cap correctly oriented e Installation is from the front side of the instrument panel with three 4mm screws in a 57mm panel cut out For installation details and drawings refer to chapter 5 7 33 of 54 Doc Nr User amp Installation manual GE VHF Communicatio
21. avourite list Both the frequency and designator of a favourite can be edited First press button and by means of the turning knob go to the desired favourite list position which may be empty or the favourite to be edited index 00 99 Press the MEMORY button a second time and EDIT will show up in the program window In the designator window a DUAE es blinking cursor will show up p o o ow under the extreme left S a COM KRT2 character The turning knob selects the za Des desired character BRULH go EDIT 1 19 923 The AUD button positions the curser one character to the MEMORY A FREQ right The DUAL button positions the cursor one y character to the left and simultaneously erases this character The station designator can consist of maximum 8 characters Press the FREQ button and follow the normal direct input procedure to edit the frequency 15 of 54 d Doc Nr CA Eat E User amp Installation manual senate 1 D a Y US VHF Communication Transceiver Revision 9 6 Sept 2013 To quite the frequency input press the MEMORY button again in order to go to the station designator window for editing the designator if required Using the buttons FREQ and MEMORY it can be toggled any time between designator and frequency input Keep in mind the watch dog timer which will terminate the input mode after 20 sec Termination save firmware version 6 14 and after Terminate just by pressing 9 fo
22. black TUM Troe ll dien peaker o LSP a F J if required Microfon R 6 d Microfon Left Bs PTT R 1f Headset 4 P Batt Plus Cm I red Batt Minus Ze a Puni V 3A E Batt Minus GND H dide Intercom 12 Mic GND Power TX Remote PTT L Ext NF 5 b sse 9 to 28V RX Remote 13 PRS LU PIU TX Remote 2 er 42 Ext NF PTT R a1 IOS ka Microphone R Headset LSP Batt Plus BATT GND KRT 2 Motorglider Single V2 40 of 54 Doc Nr lus User amp Installation manual E AN a4 Li z3 VHF Communication Transceiver fe MAINTENANCE GMBH Revision 9 6 KRT2 amp KRT 2A For Software gt 5 00 Sept 2013 6 8 3 4 Glider dual Binder snap in Microfon 09 9748 00 03 amp 09 9747 00 03 1 3 GND 2 signal E Binder snap in Microfon 09 9748 00 03 amp 09 9747 00 03 1 32GND 2 signal Microfon L 3 W brown PTT L 0 Be b PTT Left Headset 14 CN black LSP LE mI ta if Speaker Y 7 if required lt green bue D PTT Right Batt Plus ZC CH D Batt Minus 6 KH Pe Mic GND e Ze 3 A Intercom 42 N Microfon R 6 not for dynamic mic Power ck Ext NF 5 Si 9 0O 20V RX Remote 13 bid TX Remote 2 PTT RG Batt Minus GND k Bu MIC GND 9 _ PTTL B TX Remote Batt Plus Microphone L 9 PERS 8 hue o Intercom gust ote S 6 Microphone R 6 K Headset n Jee oo oO
23. ght microphone input channel The AUTO function is explained later By means of the turning knob the displayed microphone input channel amplifier gain MIC level 01 low gain 09 high gain can be selected individually The microphone signal level is dynamically displayed as bar and as numeric value from 0 00 to 1 00 in the line below 21 of 54 Doc Nr User amp Installation manual GE VHF Communication Transceiver te MAINTENANCE GMBH Revision 9 6 KRT2 amp KRT 2A For Software gt 5 00 Sept 2013 The initial MIC level should be 05 the engine should be running use a headset or earphone and speak at a normal voice level to fine tune the MIC level Whenever a new MlC level is selected the dynamic bar indicator should then be at about 50 When the microphone setup menu is terminated the new value is stored To activate AUTO the menu should be terminated with this selection BIS The range of the MIC level for standard microphones is 01 to 09 MIC levels 10 and 11 are special settings for low microphone levels like dynamic micro phones often used in gliders Those levels are valid for the left L input only 10 is used for non amplified Electret microphones with a 8 volt supply voltage 11 is for dynamic microphones only In the AUTO mode every 30 sec the left microphone impedance is measured When using an Electret microphone but a dynamic microphone is recognized internal switchover to the dynamic microphone t
24. he VOX intercom voice trigger level must be set to such a value that the intercom system is activated when speaking at a normal voice level into the microphone It should be set so that it is triggered by normal cockpit noise When there is extreme cockpit noise or there are uncompensated microphones VOX should be activated with VOX 01 permanently and enable disable by a manual intercom switch The manual intercom operation is possible with one or two separate parallel connected optional intercom switches These switches are not the PTT switches The intercom switches connect pin12 intercom with GND pin1 and 9 An e will be indicated if pin12 is not on GND Communication with the VOX system requires pin 12 to be connected to GND by means of one or two intercom switches The KRT2 unit transmits only when a PTT switch is pressed Cockpit noise suppression is only possible with differential microphones used in modern headsets Normal Electret microphones are not suitable 6 11 Post Installation Check A certified maintenance shop must verify the proper operation of the VHF transceiver or as required by national regulations A complete check of all airplane systems is required to certify that the new wiring is not causing any malfunction 44 of 54 MAINTENANCE GMBH Revision 9 6 KRT2 amp KRT 2A For Software gt 5 00 Sept 2013 The standing wave ratio SWR must be less than 3 1 I Doc Nr TD User amp Installat
25. ion VOX Voice operated intercom Voice level setting for the activation of the intercom Intercom level Intercom volume level setting 7 of 54 Doc Nr User amp Installation manual DEE VHF Communication Transceiver Sept 2013 1 3 Customer Service In order to process returned units most expeditiously please fill in the form Reshioment to be found under AlRHplus Service at www airplus24 com Suggestions which will improve this manual are very much appreciated at www airplus24 com Information concerning software updates are available under AlRplus Avionics at www airplus24 com 1 4 KRT2 Transceiver properties e VHF airborne transceiver e Frequency range 118 000 to 136 975 MHz e Channel spacing 8 33 25 kHz 2278 channel e Fast channel selection e 4 separate microphone inputs 2 x standard or 2 x dynamics e Audio input for other audio devices e Installation Standard panel cut out 57 mm e 100 user definable frequencies with up to 8 character designators Continuous transmissions will be turned off after 2 minutes Stuck mic function 8 of 54 VHF Communication Transceiver Doc Nr ABE PLES User amp Installation manual M MAINTENANCE GMBH Revision 9 6 KRT2 amp KRT 2A For Software gt 5 00 Sept 2013 2 Installation limitation The conditions and tests required for E T SO approval of this article are minimum performance standards It is the responsibility of those ins
26. ion manual Do E ONE VHF Communication Transceiver M A test flight is recommended to verify proper transceiver operation The following items should be checked e Check transceiver operation with a radio station at least 50 km away when at 2000ft or above e Check if there is unusual electrical interference or noise e f possible check the transceiver operation on low and high frequencies of the VHF frequency band 6 12 Starting Up owitch the unit on with the ON button The following display will appear The start display shows device type and the software number It then changes into the normal operating mode Direct Input 45 of 54 Doc Nr User amp Installation manual SE pe alla E Li z3 PEERS S VHF Communication Transceiver MAINTENANCE GMBH Revision 9 6 BRENNEN uM mma Sept 2013 6 13 Accessories ouitable accessories such as antennas cable sets and switches can be purchased at our online shop on www AlRplus avionics com or from other avionics suppliers 6 14 Drawings 6 14 1 Dimensions OFF DUAL AUD o e COM nr2 TX 125 100 K VOL 06 12 134 825 MEMORY FREQ 46 of 54 NTENANCE GMBH Revision 9 6 KRT2 amp KRT 2A For Software gt 5 00 Sept 2013 6 14 2 Installation Directions I Doc Nr lus User amp Installation manual Do E ONE a e VHF Communication Transceiver MAI Connection Area Panel Cut out 57 5 ACOA S Mount demount the r
27. ming the station designator 1 Frequency and designator selection FAVOURITES from the favourites list 2 Programming of favourites frequency and designator Exchange EXCHANGE of the Active and Standby frequencies 1 Selection of the frequency range FREQUENCY MHz 100kHz 10kHz 2 Toggles between frequency and designator when programming the favourites VEN Sets all variable values in any menu TURNING 1 Volume setting of headsets and KNOB speakers MHz kHz selection of the standby frequency in 3 different ranges Favourite selection Alpha character selection when programming favourites 10 of 54 Doc Nr User amp Installation manual GE VHF Communication Transceiver Revision 9 6 KRT2 amp KRT 2A For Software gt 5 00 Sept 2013 3 2 Display Indication Meaning Remarks RX Reception RX is displayed during reception with a squelch value of 02 or more TX Transmission Transmitter operates normally Te Transmitter was turned off automatically after 2 min continuous operation 125 100 Active frequency KIEL Active frequency station Displayed when frequency designator and designator is stored in the favourite list VOL Receiver volume level When AUD was pressed default after a certain time the corresponding Audio delay Menu item and setting is displayed SQ fsan O 0000 zl DM _ Displaybrighiness CON Dspaycmas OO OO Lompen ounen set BREMEN
28. n Transceiver Revision 9 6 BRENNEN uM mma Sept 2013 6 6 Electrical Connections The 15 pin D Sub connector contains all electrical connections except the antenna The battery plus connection must be protected with at least 3 amps slow blow fuse 6 6 1 Microphone Connection Both the L left and R right microphone input channels can either be connected to standard microphones standard signal level 1Vpp or to dynamic microphones standard signal level 5mV to 10mV R has less sensitivity 30mV For standard microphones a supply voltage of 8V at 3300 is provided Elementary Electret microphones can also be connected They have considerably lower signal levels and therefore require an 8V supply voltage The microphone input channel amplifier gain can be selected via the MIC Setup menu 3 4 10 When dynamic microphones are used in gliders the 8V supply voltage is switched off for power saving purposes otandard microphones normally used in headsets together with dynamic microphones generally cannot be used at the same time just alternatively Motor gliders should have a toggle switch installed to differentiate between motor less flight with dynamic microphones and powered flight with headsets When the AUTO mode is selected in the MIC Setup menu the KRT2 automatically recognizes on MIC L pin 3 which microphone type has been switched and acts accordingly Both inputs must not be wired together L is the master
29. ng of frequencies is only possible when differentiating between radio noise and radio transmissions This can be achieved with the squelch system set to a value of 02 or higher There must be radio noise suppression in order to recognize reception SQ must be 02 or higher When DUAL watch is activated DUAL is displayed on the lowest line The pointer next to the DUAL display indicates the frequency on which there is reception The Active frequency always has priority so the receiver remains on the Active frequency as long as there is reception on the Active frequency When there is no reception on both the Active frequency and the Standby frequency the receiver scans both frequencies 5 times per second When there is reception on the Standby frequency the receiver stays on the Standby frequency however it switches to the Active frequency every 2 seconds for 0 3 seconds When reception is detected on the Active frequency the receiver stays on the Active frequency The pointer next to the DUAL display indicates on which frequency there is reception RA Livtse RA t BREM TMH AULE BREM TMH DUALS 6M DuAL Ts Doc Nr User amp Installation manual GE VHF Communication Transceiver Revision 9 6 BRENNEN uM mma Sept 2013 Active frequency reception otandby frequency reception otandby and Active frequencies can be exchanged when in the DUAL mode The transmitter operates on the Active frequency only summary
30. on we recommend to use the colors only Connector Tyco AMP Mate N Lock F138 365 0 0927231 3 II ul Male 0 0350720 4 JU Gees T Contacts female 0 0926895 3 male 0 0926897 1 AWG20 0 61qmm e All others KRT 2 Two place Motor Glider AWG22 0 32qmm 38 of 54 Doc Nr lus User amp Installation manual E AN 4 Li z3 pu VHF Communication Transceiver NTENANCE GMBH Revision 9 6 KRT2 amp KRT 2A For Software gt 5 00 Sept 2013 6 8 3 2 Glider single Binder snap in Microfon 09 9748 00 03 amp 09 9747 00 03 1 32GND 2 signal Microfon L 3 3 brown EIS ge b PTT Left Headset 4 N j LSP 4 L Speaker Y LSP C E if required Batt Plus Bib m gt Batt Minus O E Fuse V E ndi i k SA Intercom 42 Batt Minus GND N Microfon R 6 Mic GND unas s Power d PTT L B Ext NF 5 e cate 9 to 28V RX Remote 43 laid ae ee TX Remote 2 Intercom 62 ENF a lg E E PTT R 1 Bras Microphone R k 5 A eadse t wmm ge Batt Plus BATT GND i i KRT 2 Glider Single V4b 39 of 54 Doc Nr lus User amp Installation manual E AN a4 Li z3 pu VHF Communication Transceiver NTENANCE GMBH Revision 9 6 BENE uM md Sept 2013 6 8 3 3 Motor glider single Binder snap in Microfon 09 9748 00 03 amp 09 9747 00 03 off 1 32GND 2 signal Microfon L 3 0 A nm M brown PEU Md ta b PTT Left CN i
31. otation knop 47 of 54 Doc Nr User amp Installation manual DEE VHF Communication Transceiver Revision 9 6 KRT2 amp KRT 2A For Software gt 5 00 Sept 2013 7 Maintenance 7 1 Periodic Maintenance No scheduled servicing tasks are required on the KRT 2 VHF unit 7 2 Repair Only exchange and flat repair of the equipment is permitted In case of equipment failure the unit must be sent to the manufacturer Refer to section 1 3 Customer Service 7 3 Cleaning Clean the display only with lint free cloth and an eyeglass lens cleaner that is specified as safe for anti reflective coatings 48 of 54 Doc Nr User amp Installation manual GE VHF Communication Transceiver Revisi l Sept 2013 8 ANNEX 8 1 Frequency Channel schedule The following table contains the operating and displayed frequencies between 118 000 and 118 100 MHz The table can be continued up to 136 975 MHz following the same principle Operating Cannel Displayed frequency Spacing channel Displayed Channel MHz kHz 8 33 25 kHz Mode 25 kHz Mode 188000 839 118 005 1160088 839 4800 180160 833 418005 118 0250 25 118 025 118025 1180250 833 11800 J 7 1180883 833 118035 118 0416 833 pm 118 0500 833 118055 118 0583 833 11800 4 118 0666 833 ane 118 0750 833 pm 118 0883 833 118085 118
32. r short time appears SAVE and the system goes back into favourite selection A sorting process can be activated by pressing again MEMORY from EDIT mode SORT will show up which stays for 20 seconds and it should be activated by RA or skipped by MEMORY When activated all 99 favourites will sorted in alphabetical order which can take several minutes During the sort procedure RUN nn is displayed in the program window with nn being the running index After skip or end of sort the transceiver then resumes the normal operating mode When the MEMORY button is pressed during the time when RUN nn is displayed the sorting procedure is terminated The favourite list then is sorted partially only and the transceiver resumes the normal operating mode 16 of 54 Doc Nr at E User amp Installation manual GE TE x IN DIUS VHF Communication Transceiver Revision 9 6 Sept 2013 Termination save firmware version before 6 14 In EDIT mode pressing MEMORY again terminates editing and SAVE will show up SAVE is available for 20 seconds and must be acknowledged by the 9 button No acknowledgement within 20 seconds results in the termination of the storing procedure Further favourites can be stored or edited by following the normal input procedure For time saving purposes it is recommended to initiate the sorting procedure after the last favourite has been saved or edited Example Vers lt 7 00 B
33. s the Intercom can be controlled manually by using an external switch Therefore the VOX system must be activated permanently by selecting VOX 01 To turn off the Intercom the talk switch default closed must be opened which will be indicated by e The manual Intercom turnoff only works by a deactivated external audio input For use in gliders the VOX has to be set 1 use 5 because VOX 1 turns off the speaker 19 of 54 Doc Nr User amp Installation manual GE VHF Communication Transceiver Revision 9 6 KRT2 amp KRT 2A For Software gt 5 00 Sept 2013 4 4 5 TXm PTT Switch Selection Pressing the AUD button three times enables the turning knob to select certain PTT switches In addition when one of both PTT switches is disabled not Both the respective microphone channel is disabled during trans missions TXm x Left Right as Both 4 4 6 INT Intercom Volume Pressing the AUD button four times enables the turning knob to set the intercom volume INTnn Range 01 10 4 4 7 EXT External Audio Input Volume Pressing the AUD button five times enables the turning knob to set the external audio input volume External audio inputs can be audio alarms voice alarms music etc Required level is 200mVpp Activation occurs for settings gt 00 and will be indicated by the flag a The setting 00 is turning off this input EXTnn Range 00 10 4 4 8 DIM Display Brightness Batt voltage
34. st When in the SET UP Menu select the ERASE submenu with the LEY FREQ MEMORY LZ Erasing the favourites frequency and designator starts after the L button was pressed again This procedure may last a few minutes during which time ERASING is displayed All INFO frequencies and designators that were stored on delivery are lost and all favourite index positions 01 to 99 are available to the user 29 of 54 bugs User amp Installation manual on M E Li z3 pu VHF Communication Transceiver MAINTENANCE GMBH Sept 2013 4 9 2Channel Spacing When in the SET UP Menu pressing the FREQ S button will change the KRT2 into the Channel Space submenu The desired channel spacing then can be selected and the X then indicates the actual channel spacing 5 Remote Control Tandem seat airplanes can be equipped with the KRT2RC Remote Control Unit The remote control unit is connected to RS232 serial interface and enables selection of the most common settings like frequency volume squelch VOX display contrast and brightness In addition the unit has an independent memory for favourites frequency and designator Transmission error messages are displayed in the error window in the third line R_Time Time out transmission error H ChkS Checksum error R Cmd Unknown command H Char Data error R Freq Wrong Frequency The error message disappears when a valid command or a new frequency has
35. talling this article either on or within a specific type or class of aircraft to determine that the aircraft installation conditions are within the E TSO standards E TSO articles must have separate approval for installation in aircraft The article may be installed only if the installation is performed in accordance with Part 43 or the applicable airworthiness requirements 3 CONTROL general 3 1 Control Elements Overview Field for Audio Status a Aux on v VOX on listen on two frequencies select audio mode e extern Intercom for Area for A Volume Squelch Flag for VOX f AUD TX Transmit AE Intercom RX Receive bp oN DIM Contrast Active marker lt Active frequency Battery status amp Error fie Standby frequency Active area otand by area iin M Window for MEMORY FREQ Set Frequency MHz 1xx nn Program 100kHz 1nn xnn DUAL mode Li 10kHz 1nn nxx Modulation Memory mode tE for 100 favourite set Frequency frequencies Exchange set Audio levels standby lt gt active set Mem Freq 9 of 54 Doc Nr User amp Installation manual GE phn VHF Communication Transceiver Sept 2013 Self locking switch 1 Scanning between the Active and DUAL Standby frequencies WATCH 2 Positioning cursor to the left when programming the station designator 1 Stepping through the audio menus AUDIO VOL SQ VOX TX INT EXT DIM CON SELECT SIT and MIC 2 Positioning cursor to the right when program
36. tion it becomes a small dot approximately in the centre Also if it far off centre it indicates that there is bad antenna matching 2 of 54 Doc Nr User amp Installation manual GE VHF Communication Transceiver Revision 9 6 BEEN uM mma Sept 2013 4 8 Resetting to factory settings Returning to the factory settings can only be initiated during power up To do this during power up the MEMORY and DUAL buttons must be pressed simultaneously and the display will show SET DEFAULTS When the buttons are released the resetting to the factory settings takes place When resetting is completed DONE is displayed Resetting to the factory settings will not change any data in the favourite list memory 28 of 54 Doc Nr lus User amp Installation manual Eege a4 E Ce pu VHF Communication Transceiver MAIN TENANCE GMBH Revision 9 6 KRT2 amp KRT 2A For Software gt 5 00 Sept 2013 4 9 SET UP Menu During power up the MEMORY buttons must be pressed There are two functions within the Set up menu e ERASE Erasing of the favourites frequency and designator e Channel Spacing 25kHz 8 33kHz Programming of the Set up is done with the lower 3 buttons Their function is described on the display MEMORY LZ Set up program exit is with the MEMORY button The unit remains powered and the normal operating mode is resumed Remark B VA y FREQ 4 9 1 ERASE Erasing the Favourites Li
37. utton MEMORY gt 23 Button MEMORY EDIT select location entry for name amp frequency Rotating knob Cursor buttons Button FREQU gt frequency setting Use MEMORY to go back to EDIT Button MEMORY gt SAVE now with use 9 to save it do nothing for cancelling After save it comes the question for sorting Yes 4 No MEMORY or do nothing 17 of 54 MAINTENANCE GMBH Hevision 9 6 KRT2 amp KRT 2A For Software gt 5 00 Sept 2013 4 4 AUD Audio Menu I Doc Nr PNS User amp Installation manual a ORE VHF Communication Transceiver DUAL AUD Any action in the Audio Menu Ch requires the pointer lt to be next KRT2 to the Audio menu window see picture When the pointer is next to 127 GG the Standby frequency window the VOLES lt pointer can be repositioned by ZA ZOG pressing the AUD button once MEMORY A FREQ VOLnn is the Audio menu default display No action on any control for v more than 10 seconds will result in the VOL nn display Audio Menu items can be accessed in the following order by repeatedly pressing the AUD button VOL default SQ VOX TXm INT EXT DIM CON SIT MIC Audio menu items to right of the above list are less used than the left ones 4 4 1 VOL Volume Turning the turning knob changes the receiver volume VOLnn Range 01 16 The VOL setting only concerns the receiver and not the intercom system Intercom volume values are set in the INT audio menu
38. ype and vice versa will take place When using a dynamic microphone and an Electret microphone is recognized internal switchover to the Electret microphone type will take place For the dynamic microphone the gain value 11 will be set for L If Electret is recognized the presented values will be set AUTO eevee AS eS R Ga LE SEI ec Mic Gun For the std part the previous individual setup is stored when the menu was leaving The MIC submenu is ffminated by pressing the AUD button Additional indications Additional indications for test purposes 22 of 54 Doc Nr User amp Installation manual GE VHF Communication Transceiver Revisi Sept 2013 E de RF receiver input level from Automatic Gain Control Ext son External audio input voltage Mic dyn or Mic std Display indicates which microphone type has been selected either by the user or recognized in the AUTO mode 23 of 54 Doc Nr User amp Installation manual GE VHF Communication Transceiver Revision 9 6 BRENNEN uM mma Sept 2013 4 5 DUAL Watch Because the communication transceiver KRT2 contains only one receiver DUAL watch is achieved by alternating between the Active and Standby frequencies The DUAL button activates and deactivates the dual watch function Deactivation also can take place by pressing either the FREQ or MEMORY buttons The frequencies to be watched should be selected prior to the DUAL watch selection ocanni
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