KRT2 Operation and Installation Manual
Contents
1. 21 c AMIS MIL Eo CIL RE E 20 aO Spo ilor Ton call ON rr 30 BO CVE ESE IOVI NER TM 30 1025 Opis si oi u uuu uu T MAS 31 e Rescime To Factors sel uuu uuu nuna aa EEE EE EEEE EEE 32 ko HEP SARI EU 32 4 8 1 ERASE Erasing the Favourites LISt 33 S2 Channel Pacio e 33 s Pomo C oio TTT 34 C S TTT 35 o NEN S 21T inte 9 lt E ERECTUS 35 Doc Nr User amp Installation manual Bean pj VHF Communication Transceiver Le WIEA y r gn KRT2 Revision 11 3 x CK T 0 2 WEN COMIC AON 1 a aos uuu u uyu u au sebuashuypusyakasashaaayapibussukawkasayk 35 s MESS 6 8120 8 KIA O REI mU Em 35 6 4 Unpacking and Inspecting the Equipment 36 Gs EE Fe DEREN 36 6006 3EIeethrcabC OD CUO osos nisus LU E ntediMi sa a M nda dont o e edis entume 37 0041 Microphone Connect 0 o ones uisu sassa E E 37 6 6 2 Speaker amp open mtcrophone 38 0600 5 Earphone C e Lee Te 39 601 External Audio ripu uuu uuu u a Su ss 39 0 09 SPC ACE COMMS L uwa ssssysssamasamauscuissanqnkaquasawaupausiuqaadusqukassasa 39 o CCS Gi a S IPM 40 L S lt CG uu TUTTA 40 6 7 2 For motor gliders dual seaters2. 1nn nxx Press the FREQ button once or several times until the desired frequency range is highlighted When the pointer is not next to the otandby Frequency window it will be repositioned with the first pressing of the FREQ button D 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 16 60 Doc Nr User Installation manual BE eae sN lt i VHF Communication Transceiver Revision 11 3 EEUU KRT2 Ag 2015 4 3 2 Frequency Selection from the Favourites List MEM By pressing and operating the turning knob a specific favourite list position can be accessed xx xx index 0 99 When frequency and station designator have been defined they will be displayed in the Standby and station designator windows The favourite list designators can be sorted in alphabetic order see 4 3 3 Storing and Editing Favourites D 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 favourite list Both the frequency and designator of a favourite can be edited
3. Revision 11 3 Aug 2015 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 pin 1 and the microphone GND to the pin 9 only 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 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 90 60 Doc Nr User Installation manual BE eae sN m 0 VHF Communication Transceiver Revision 11 3 EEUU KRT2 Ag 2015 6 9 Antenna 6 9 1 Antenna Selection e A50 Ohms impedance VHF COM antenna is required e The antenna must be approved in respect to aircraft type and installation location e The antenna specifications can only be fulfilled when properly installed 6 9 2 Installation Recommendation e The manufactures instructions have to be observed e The metallic contact between airplane surface and antenna ground must
4. 40 5 59 TOM Lens og DIES uuu sun lumu aaa eee en imde NE apas 40 C M DPI A sss s sss 42 P Wy 1 v A UU PONES Tc 42 6 8 2 Connector Pin Configuration 42 s Nil c Rm 43 6 8 3 1 Two place motor aircraft connection 43 6 8 3 2 Ghderttwoplace CONMCCH ON es racecwssenasecedaanstvadedevendnsdecwsseuateciuasetvacedevendineaes 44 Ooo OBICET S IDEE D ee nee Ore eee T ener nem errr rene Seen re eee AR EPA rere rer 46 6 8 3 4 Motor glider single 47 OSSI 2MIOIOT P GET s Ub Leterrier ae Te O E ee 48 6 8 4 Wiring for dynamic microphones 50 06 5 5 Conneclon S iL uuu uuu re Tenet me ent tuns en teenie ee ete i aa EE ree 50 5 MEE UE 51 DI lcuid SEC e LS ite adsum iue then poteras Pu Dds ny Ore eer ne nee 51 6 9 2 Installation Recommendation 51 6 10 Microphone general u uuu u u auyaqssaaqsqanaqquwwaquyassuqyaqqaywasawawaqaspupayaaquwasawsayqa 52 6 11 Jo i OR C eC L u u uuu E 53 6 12 SL ii j sns asa ns 54 6 13 PROC MNT MATRE 54 6 14 Ib dn M 29 Meh JO
5. 4 4 12 Menu lock For school operation the menus area TXm to MIC setup can be locked To lock or unlock the button combination AUD amp FREQ has to be pressed simultaneously for gt 2 seconds In lock condition there will be displayed a L at the right end of the third line To store those condition the setting of SQnn should be changed before turning off Avallable Locked and not available 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 scanning 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 2 60 Doc Nr User amp Installation manual DE n N VHF Communication Transceiver L MAIN TENAN 7 baie Revision 11 3 s mE 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
6. Doc Nr y lA H Es gres User amp Installation manual DE 10008001006 VHF Communication Transceiver n ma m 4 8 1 ERASE Erasing the Favourites List When in the SET UP Menu select the ERASE sub menu with the buttons next to the symbols Exit Y Favorites 7 Erasing the favourites frequency and designator starts after the 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 4 8 2Channel Spacing When in the SET UP Menu pressing the FREQ S button will change the KRT2 into the Channel Space submenu Channel Space i 8 33 25 KHz X 2 25 KHz x E i L x Xu cc REA dE En x K A i A The desired channel spacing then can be selected and the X then indicates the actual channel spacing 33 60 Doc Nr User Installation manual BE eae sN m 0 VHF Communication Transceiver Revision 11 3 EEUU KRT2 Ag 2015 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 settings In addition the unit has an independent memory for favourites frequency and designator Transmission er
7. If possible check the transceiver operation on low and high frequencies of the VHF frequency band 53 60 I Doc Nr y BED lus User amp Installation manual B canine pf lt VHF Communication Transceiver MAINTENANCE DA BA Revision 11 3 EEUU KRT2 Ag 2015 6 12 Starting Up Switch the unit on with the ON button The following display will appear Vers 8 2 FREQ The start display shows device type and the software number It then changes into the normal operating mode Direct Input 6 13 Accessories Suitable accessories such as antennas cable sets and switches can be purchased at our online shop on hitp Awww dittel avionik de or from other avionics suppliers o4 60 User amp Installation manual n VHF Communication Transceiver DE 3000 800100e CWWw ss Revision 11 3 ae Aug 2015 6 14 Drawings 6 14 1 Dimensions E o n3 oooDooo ooooooao 55 60 Doc Nr PhS User amp Installation manual DE 3000 800100e 44 B SS VHF Communication Transceiver MA MAINTENANCE G F GMBH Revision 11 3 EEUU KRT2 ug 2015 6 14 2 Installation Directions Connection Area Panel Cut out o6 60 Doc Nr User amp Installation manual B n pl VHF Communication Transceiver erar MAINTENANCE GAB KHA Revision 11 3 mre Aug 2015 7 Maintenance 7 1 Periodic Maintenance No scheduled servicing tasks are required on the KRT 2 VHF unit 7 2 Repair Only exc
8. KHI2 VHF Communication Transceiver M e 124 400 ce yi OLA O sru FRED 2 f ON AUD E Y MEM P N 100 0002 800 Operation and Installation Manual 1 60 S Doc Nr User amp Installation manual en ae VHF Communication Transceiver hon a MAINTENANCE PMEH KHA S Revision 11 3 Aug 2015 Record of Revisions Revision Date Subject O o menema aaea raving carly microphone GND Mai 2014 Menu limitation PTT Mic assignment Installation limitations Text corrections Mic AUTO enhancement 9 2 60 Doc Nr User Installation manual ON m VHF Communication Transceiver Revision 11 3 KRT2 Aug 2015 List of Service Bulletins SB Service Bulletins have to be inserted in the manual and entered in the table Rev Date Unit overview Item No Product Overview Basic Version Introduction of e 2 Standard Microphone Inputs e Auxiliary Audio Input e DUAL Watch Function 3 60 Doc Nr User amp Installation manual Bean pj VHF Communication Transceiver Le WIEA y re gn KRT2 Revision 11 3 x CK T TABLE OF CONTENTS J CEL A S nu m uns u u 6 MOG u n asnu u E u 22 us 6 Le ADO O VIII I ene unus E ee oe ee 7 o Chi ere eS R UNIT TM 8 IX KRIZ Prinse eiyecpioperli6S uuu uuu 2 Quay EE 8 AE WAST AN ATION BT ci lt e uuu uu unuman umakuntaspimqwapakapaqqunqlsni awas kanqawpuiam
9. 0 99 this index they are displayed upper ower The pointer indicates what Arrow is positioned in the turning knob will change correspondence to the button pressed AUD or FREQ BAT Supply voltage is low Battery low or lt 10 5V Battery Generator faulty 12 60 Doc Nr User amp Installation manual ES D SD n VHF Communication Transceiver Revision 11 3 KRT2 d a AUX Input active Status of certain Audio v VOX active menu functions e external Intercom switch active Displayed when frequency MUC IN a gaua and designator is stored in 9 the favourite list 3 3 Audio Menu levels Displayed Signification Remarks SQ swen o ST VOX Voice operated intercom OZ 00O DM Display rightness S BAT DCsource check SSS NT nont uu Volume of external devices PTT button selection Left Right Both During transmitter operation MIC setUp Menu for Service Menu ohne Mikrophones Funkbetrieb 13 60 7 ae User amp Installation manual ss rf T Y VHF Communication Transceiver Aug 2015 3 4 Self test error reports Display Meaning Remak Er PLL Internal error no Return the transceiver for transmission maintenance Er ADC Return the transceiver for maintenance Er FPA Internal error unit not Return the transceiver for usable maintenance Return the transceiver for usable maintenance Return the transceiver for usable mainten
10. Ld Li L LL R o F 7 j Standard M Left L ee o m KEE uman ae eee m D ynamic Microfon Dynamic Microfon gliding mic Micrafon L 3 PTT L 40 PTT R 1 Headset 14 standard Microfon Right Microfon R 6 Headset Fight m om me 7 intercon Man Intercom 12 2 x L 9 gt LsP G E amk queo rte CH fit required Ext NF 5 Aux Audio in TX Remote 2 p PTT Right H D PTT Left Batt Plus s 0 SEE Z Batt Minus o Fuse N Mic GND p Batt Minus Power pen TX Remota STX mE 9 to 28V PTT R Microphone L JL 12 V u LSP JE Sima Ext NF 4 5 6 Re Microphone R iz 8 9 Fer eadse J fa LSP front view male Batt Plus Wire cross secioan Battery amp AMG 20 0 619mm All others AWG22 0 32qgmm The view anto the correct side of the connectors is very confusing For orientation we recommend to use the colors only Connector TycaAMP Matea M Lock F 158 365 0 0927231 3 Male 0 0350720 4 Contacts famala 0 0826985 3 male 0 0926897 1 KRT 2 Two place Motor Glider electret mic non AUTO mode Microphone Setup leave L 3 9 in case of dynamic 11 R 3 not AUTO mode 49 60 I Doc Nr User amp Installation manual doc M VHF Communication Transceiver sah MAINTENANCE pM B 2 KR
11. Revision 11 3 EEUU KRT2 ug 2015 individually The microphone signal level is dynamically displayed as bar and as numeric value from 0 00 to 1 00 in the line below 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 Special hint At activation of MIC Setup the present condition of speaker switch will remain SQU on off At speaker use a feet back can become active When the microphone setup menu is terminated the new value is stored To activate AUTO the menu should be terminated with this selection else leave in L or R position 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 For high gain selection 9 the use of side tone can lead to a feed back at transmission In that case it should be set to SIT01 In the AUTO mode up to Firmware version 6 16 every 30 sec then at transmission start the left microphone impedance is measured When using an Electret microphone but a dynamic microphone is recognized internal switchover to the dyna
12. s 6 giang Microphone R 7 8 Ji fa Ei Headset 4 m lep c l G front view mais a WOM Batt Plus The view onto the correct side of the connectors is very confusing oS For orientation we recommend to use the colors only c e Connector Tyco AME Male M Lock F138 3655 D 0827231 3 Male 0 03230720 4 B o Wire cross secion Contacts famala 0 0926895 0 mala 0 0926897 1 Battery amp AWG20 0 61gmm All others KRT 2 Two place Motor Microphone Setup set L R as required for headset leave not in AUTO 43 60 VHF Communication Transceiver Doc Nr n HE plus User amp Installation manual e M i AINTENANCE GABH Revision 11 3 EEUU KRT2 Ag 2015 6 8 3 2 Glider two place connection Binder snap in Microfon 09 9748 00 03 amp 09 9747 00 03 1 3 GND 2 signal Binder snap in Microfon 09 9748 00 03 amp 09 9747 00 03 1 3 GND 2 signal Microfon L 3 3 c FT brown M0 Wg L e blue O 5 PTT Left eadset 14 NS black LSP 4 m m T Speaker Y LSP T 1 if required lt green hue p PTT Right Batt Plus red Batt Minus T _ Mic GND 2 dy Intercom 12 N Microfon R 6 not tor dynamic mic Power Ext NF 5 RX Remote 13 TX Remote OOO f PTT R 3 9 to 28V Batt Minus GND MIC GND f PTT L TX Remote Balt Plus _ Microphone L PTT R an _ amp LSP Intercom I 42
13. to be next to the Audio menu window see picture When the pointer is next to the Standby frequency window the 0 VOKAS pointer can be repositioned by M ZELL SEE pressing the AUD button once VOLnn is the Audio menu default display No action on any control for more than 10 seconds will result in the VOLnn display Audio Menu items can be accessed in the following order by repeatedly pressing the AUD button VOL defaut SQ VOX TXm INT EXT DIM 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 4 4 2 SQ Squelch Pressing the AUD button once enables the turning knob to change the squelch level values sQnn Value range 01 10 20 60 Doc Nr User amp Installation manual Bean pj VHF Communication Transceiver Revision 11 3 EEUU KRT2 ug 2015 The Squelch setting is depending on several factors 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
14. AUD 4x for TXm Set to TXm Press button AUD 6x for EXT Set to EXT 00 turn off For dynamic Microphones Press button AUD 10x for MIC Set to MIC L to Level 11 Press button AUD 8x for SITxx Set to SITO1 turn to min For Electret Microphones Press button AUD 10x for MIC Set to MIC L to a level 3 to 10 so that indication is just exceeding 12 of the maximum Leave the menu in position L not AUTO 6 7 2 For motor gliders dual seaters For change mode motoring amp headset gliding amp dynamic microphone Press button AUD 3x for VOX Set to VOX 3 on condition for 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 For 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 40 60 Doc Nr User amp Installation manual Bean pj VHF Communication Transceiver Revision 11 3 EEUU KRT2 ug 2015 Press button AUD 10x for MIC Set to MIC Level 3 or as required Set MC R as required or to 1 if unused Leave the menu in position L not AUTO 41 60 Doc Nr User amp Installation manual BE T VHF Communication Transceiver J ZJ BB
15. Ds i POD a E E a ades e Eo E E E E 55 o ili i eT Re Da a AS S ss sss 56 Co Naena Cu u u 2 a E 57 C PO y Tee Tc UNM D ik NETTE 57 J 22 TT SS USD SSS S SS SS SSS SS Ds 57 p MEM Trt SSS sss 57 Ez GER eee er a n sisan nani susan P 58 l Fregu ncy C hannelsschedule L LLL UULLu aska aissskusakiasayauakalyawaqqusyasssuyatqakipsq 58 o2 C libi uu uum au ree 59 o 60 Doc Nr User amp Installation manual Bean pj VHF Communication Transceiver E e B MAINTENANCE GMBH KHA Revision 11 3 Aug 2015 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 A WARNING AN Non compliance may cause personnel injury due to radiation or fire CAUTION A Non compliance may cause damage or incorrect operation of the transceiver INFORMATION 6 60 User amp Installation manual ss VHF Communication Transceiver 1 2 Abbreviations Push to Talk Transmitter activation VOX Voice operated intercom Voice level setting for intercom activation Intercom level Intercom volume level setting 7 60 Doc Nr User amp Installation manual Bean pj VHF Communication Transceiver Revision 11 3 EEUU KRT2 Ag 2015 1 3 Customer Service In order to process returned units most expeditiously please fill in the form Reshipment to be found under S
16. MAIN TENA NCE GMB s ali 6 8 Wiring 6 8 1 Wire Gauges Supply lines Power GND AWG18 0 83 mm Control lines AWG22 0 38 mm All wires must be aviation certified 6 8 2 Connector Pin Configuration Batt Plus 4 LSP 7 Headset Microfon R 13 RX PC Ext NF B Intercom LSP 4 11 PTT R Microfon L 3 PTT L TX PC 2 Mi E Batt Minus 1 OF GND If manual intercom is not used pin 12 should be grounded 42 60 Doc Nr He pius User amp Installation manual d TREN i VHF Communication Transceiver AINTENANCE GMBH Revision 11 3 KRT2 Ag 2015 6 8 3 Wiring Diagram 6 8 3 1 Two place motor aircraft connection Standard Mn Left Microfon L 33 PTT L 70 Headset 14 I Micrafon R B t D Standard S i Microfon Right Headset Right a white e Man Intercom 12 SUO bkn Intercon l 2d if manual intercom is not used o l q FL els Optional to Y 30cm simblify installation L M LSP X 4 ke Ext NF 5 me ee His Her in RX Remote 3 TX Hemnte 3 HT green D 1 PTT Right PTT R i I orange _ E 5 ENS brown L Batt Plus E rel E Batt Minus setae 1 Fuse a 3 A x Mic GND lt H Batt Minus Power PTTL e TeRena STX u 9 to 28V PTTR la Microphone L pmm Pl ATE _ LSP 1 2 ipi S Ext NF Iia 4
17. MEM 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 17 60 mM BE plus User amp Installation manual DE 10058001006 A E Es VHF Communication Transceiver MAINTENANCE N Revision 11 3 KRT2 Ag 2015 In the designator window a blinking cursor will show up under the extreme left character n Ll The turning knob selects O VOXG5 d the desired character M ST JOHA The AUD but u e utton positions p I 4 the curser one character to the right The DUAL button positions the cursor one character to the left and simultaneously erases this character The station designator can consist of maximum 8 characters To change frequency just press the FREQ button and follow the normal direct input procedure to edit the frequency 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 From the designator mode only terminate just by pressing 714 for short time it appears SAVE and the system goes back into favourite select
18. Transceiver Revision 11 3 kanan KRT2 Ag 2015 4 6 Transmitter Operation The unit transmits on the active frequency upper line as long as a PTT oress to talk switch is pressed WIEN I UDLBT nm ST JOHA VOLB NIEN I ST JOHA 1124 400 FREQ hne 120 350 FREQ Transmission Reception X indicates normal transmitter operation RX Indicates a receiver 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 IX to Te To resume transmission the PPT switch first must be released and then be pressed again While transmitting the external audio input will be turned off automatically The microphone selection is dependent upon the pre setting of the TXm 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 29 60 Doc Nr User Installation manual DE n N m VHF Communication Transceiver Revision 11 3 EEUU KRT2 ug 2015 In case there is just one PTT button available and multiple head
19. Transceiver 10 AINTENANCE GMBH Revision 11 3 Aug 2015 6 8 3 4 Motor glider single Binder snap in i 09 9745 00 03 amp 09 974 7 00 03 Microfon 1 32 GND 2 signal Microfon L 3 Gg oA PTT L 10 7 motoring blue b PTI Left LSP black I s ioni L B O ed T peaker LSP 7 um gt i if required Headset mic KRT2 O Microfon R 6 PTT R 71 Headset 4 Pas i zn Batt Plus red t Batt Minus L Fuse 3A Batt Minus GND i P Intercom 12 Mic GNDf a Power zs gar Remote Ext NF 9 UT Microphon L Batterie 9 to 28V RX Remote 13 PTT R Ep id Re TE intercom TX ae m Ext NF u PTT R G1 voee s Microphone R n Headset E LSP iw Run non AUTOMATIC KRT 2 Motorglider Single PT T Select Microphone Setup set L R as required for headset leave not in AUTO mode 47 60 Doc Nr n HE plus User amp Installation manual Sa onions i VHF Communication Transceiver AINTENANCE GMBH Revision 11 3 Aug 2015 6 8 3 5 Motor glider dual Dynamic Mikrophon Binder snap in 08 974 8 00 035 amp 06 974 7 00 03 1 3 GND 2 siqnal Dynamic Microfon Binder sn p ir Y DG B748 0D na g 0B Bz47 no 03 Dynamic Microton M395GND 2 3ignal Motor glider Standard Microfon Left clase in glider mode amp MIC Setup to AUTO or leveli Microfo
20. a kakunata 9 25 M SCENE 9 23 CONTROL 0GNE S uuu nR E EES EEEE E EEE EEE ENES 10 o Control Elements UVerviEW uuu aka uasanqa sskasikaaqasuwapssqawasahhuqaqawakapspaqybpuqsawapaaywpa 10 Ie DRD a a E E E E sss sss 12 SS AUU NI iki K uuu ERU 13 IS ICS OMe jD iu uyu 2u E O E 14 4 PER I OC N u uuu aasan asa 15 XE CU e PN ea E S S SI E E E A sss sa 15 Ta COIN 6751 Wy I PIPER TT DTE 15 c PRCOWCICY Se Ic HOT u uuu uuu uu Z uuu A 16 44 Direct Fregucney Sel dlio y u u uuu u ua n Mmi MN MM GN REESE 16 4 3 2 Frequency Selection from the Favourites List 17 4 9 SOrme and Edine Payounele6s u uuu um u uama Taoa 17 tA AUD I I mi m Sms as 20 c VOLVO l Nm 20 a Ma Sc SGU T 20 4 44 3 VOX Intercom Voice Trigger Level Setting 21 Ja Mil hi q Qu uuu uuu uuu ET 21 445 TXm PTUSWileh Selection ss uuu uu E ashsspusakuasia 22 446 INT Intercom Vollur lll aaa eon i ke N SE RENEO NiE 22 AAT EXT External Audio Input Volume 22 4 4 DIM Display Brighin ess uu ui bie atari Ru PAUro de PREISE ERU aa 23 AAD BAL Battery esles E RUPES E edstaT uode Pd tI RED RRE 29 EMI MERCI es Soa 16 1 ECT T UTE 24 AEL MIC sS pu uuu a uu 24 c INTO T umn A E 2 s 24 XE PIS IR
21. 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 e n 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 e he 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 e n gliders the internal antenna provided by the airplane manufacturer is to be used The RF 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 51 60 Doc Nr User Installation manual BE eae sN m 0 VHF Communication Transceiver Revision 11 3 EEUU KRT2 Ag 2015 6 10 Microphone general The correct setting of the MIC and VOX values is of great importance for the Intercom system see 4 4 3 VOX Intercom Voice Trigger Level and 4 4 11 MIC Setup The 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 not triggered by normal cockpit noise If there is extreme cockpit noise or there are uncompensated microphones VOX should be
22. channel spacing RENI iat 5kOOASE f r 8 33kHz channel spacing 6 3 Scope of delivery Part Number KRT2 KRT2 VHF Transceiver ZUB2 4 pcs Mounting screw KRT2 for panels up to 3mm Operation and Installation Manual 35 60 Doc Nr User amp Installation manual Bean pj VHF Communication Transceiver Revision 11 3 BED KRT2 ug 2015 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 here must be sufficient space for cables and connectors e Avoid sharp bends and wiring close to control cables Cable length must be such that connectors are accessible for repair e he wiring to the transceiver must be installed such that water droplets formed by condensation will not run into the connector e Remove 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 ca
23. 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 e 28 300 31 JOHR VOLO 124 400 WIEN I VOLG7 3T JOHA WIEN I DALA 120 358 DUAL 124 Anf Active frequency reception Standby frequency reception otandby and Active frequencies can be exchanged when in the DUAL mode The transmitter operates on the Active frequency only Summary 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 28 60 Doc Nr User amp Installation manual Bean pj VHF Communication
24. 05 dBm gt 6 dB S NIN m 30 1 kHz 6 dB bandwidth gt 8 0 kHz 6 dB bandwidth gt 2 78 kHz BANDWIDIH 25 KHZ BANDWIDTH 8 33 KHZ SELECTIVITY 40 dB bandwidth lt 17 0 kHz channel spacing 25 KHZ 60 dB bandwidth lt 22 0 kHz SELECTIVITY 60 dB bandwidth lt 7 37 kHz channel spacing 8 33 KHZ 210 W into 4 SPEAKER OUTPUT Deviation of NF output 6 dB AGC CHARACTERISTIC from 10 uV to 10 mV SQUELCH Automatic Squelch adjustable SPURIOUS RESPONSES gt 80 dB DISTORTION 350 2500Hz lt 25 at rated power 85 33dBm lt 10 at 10dB below rated power 70 33dBm 60 60
25. 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 pint The intercom deactivation will be indicated with e 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 o2 60 Doc Nr f BE x X BE o ao de jn r Communication Transceiver az EJ po MAINTENANCE GMBR Revision 11 3 EEUU KRT2 Ag 2015 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 The standing wave ratio SWR must be less than 3 1 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 Check if there is unusual electrical interference or noise
26. ance reception corrupt maintenance Return the transceiver for usable maintenance 14 60 l i Doc Nr A Ed User amp Installation manual BE o sono aez brm VHF Communication Transceiver Revision 11 3 EEUU KRT2 Ag 2015 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 E AI Device name KRT2 i p lus Software Version e g V8 2 Vers 8 2 FREQ example The unit then starts in the normal operating mode using and displaying the data last used 15 60 Doc Nr User amp Installation manual BE PT VHF Communication Transceiver pe sss S 4 3 Frequency Selection There are two different frequency selection methods e Direct Input e Selection from the favourite list index 0 99 4 3 1 Direct Frequency Selection Qo se A The Standby Frequency is set with 4 a sa s amp the turning knob in 3 different ranges E m E The selected range is highlighted and w as IIH TD v can be changed with the FREQ ZELL SEE VOLLI button Frequency ranges are 128 LIE ixx nnn 1nn xnn
27. ation designator Frequency and designator selection from the favourites list FAVOURIIES Programming of favourites frequency and designator Exchange of the EXCHANGE Active and Standby frequencies Pressing for Selection of the frequency range to MHz 100kHz 10kHz Toggles between frequency and designator when programming the I favourites nm did Sets all variable values in any menu Volume setting of headsets and d TURNING speakers NS MHz kHz selection of the standby frequency in 3 different ranges Favourite selection 4 Alpha character selection when programming favourites Change of microphone settings 11 60 Doc Nr User amp Installation manual Bean pj VHF Communication Transceiver 3 2 Display RX is displayed during RX Reception reception with a squelch value of 02 or more TX Taran saa Transmitter operates normally Transmitter was turned Te off automatically after 2 min continuous operation 119 700 Active frequency Displayed when frequency ZELL SEE ma un and designator is stored in 9 the favourite list When AUD was pressed the corresponding Audio Menu item and setting is displayed DUAL function is ry deactivated by frequency Standby Frequency are change or by pressing the monitored simultaneously DUAL button again Receiver volume level default after a certain time delay When frequency and MEM Favourite list index designator are stored at
28. ervice at http www dittel avionik de Suggestions which will improve this manual are very much appreciated at http www dittel avionik de Information concerning software updates are available under AlRplus Avionics at http www dittel avionik de 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 60 Doc Nr User amp Installation manual Bean pj VHF Communication Transceiver 4 a Yema MAINTENANCE GABH KHA Revision 11 3 SUK Aug 2015 2 Installation limitation The conditions and tests required for E TSO approval of this article are minimum performance standards It is the responsibility of those installing 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 2 1 Insta
29. hange 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 o 60 I Doc Nr User Installation manual BE PN VHF Communication Transceiver Revision 11 3 EEUU KRT2 Ag 2015 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 118000 839 1805 D 8083 838 1800 1180160 833 180055 11602500 25 118025 118025 1180250 833 11800 A 1180883 839 1180985 1180406 839 11800 J 8050 833 11805 Z 1180588 839 11800 Z 1180600 833 1180065 1180750 833 118080 1180883 833 118085 1180906 839 11800 J 4 18100 839 18105 A etc eic etc etc 58 60 mr Doc Nr User amp Installation manual Bean pj VHF Communication Transceiver 8 2 Technical Data Compl
30. iance 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 EUROCAE ED 23C RTCA DO 160E RTCA DO 178B ED Level D Height 68mm after 2014 62mm Width 62mm Depth 144mm plus rear panel plugs 60mm Weight 0 36 kg panel mounting cut out 57 mm Temperature Ranges Operation 20 C to 55 C Storage 55 C to 85 C 6G operation 20 G crash safety C4Z CAB SM XXXXXXZBAB AC YMXXXXAX Power Supply 9 VDC to 33VDC test 13 8VDC e Transmitter 2 0 A typ e Receiver 0 13 A e Illumination 0 06A e Audio Power amp Up to 1A emergency operation 9 VDC Power Consumption Standby 1 6W Transmit 30 W Frequency Range 118 000 to 136 995 MHz Frequency Stability 5 ppm external fuse required 3 A slow blow Compass Safe Distance 30 cm 59 60 I Doc Nr User Installation manual s sus VHF Communication Transceiver TRANSMITTER POWER OUTPUT 6 W nominal e gt 13 5v 4 W minimal HARMONIC DISTORTION SIDETONE OUTPUT MICROPHONE INPUTS 2 x standard 50mV 2V into 100 or 2 x dynamic HARMONIC CONTENT gt 60dBc MODULATION FIDELITY deviation lt 6 dB von 350 2500Hz CARRIER NOISE LEVEL gt 35qB at 70 Modulation index UNWANTED FREQUENCY lt 1kHz at m 0 1kHz MODULATION DUTY CYCLE 2 minutes on 4 minutes off automatic turn off after 2 minutes continuous transmitter operation RECEIVER SENSITIVITY 1
31. ion A sorting process can be activated by pressing again MEMORY from EDIT mode 18 60 i Doc Nr User amp Installation manual BE nc s VHF Communication Transceiver Revision 11 3 PP KRT2 Aug 2015 SORT will show up which stays for 20 seconds and it should be activated by 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 Example 1 Button MEM gt SEL 23 Select location 2 Button MEM gt EDIT Input of name Rotation knop to select character For cursor use AUD DUAL Frequency setting gt press knop Use button MEM to go back to EDIT 3 Button P gt shortly SAVE gt back to 1 do nothing cancelling 4 Button MEM gt question for SORT Yes E No MEM or do nothing 19 60 pe s I Doc Nr y BED lus User amp Installation manual B DIOE pf lt VHF Communication Transceiver Y MAINTENANCE GMBH NENNEN KRT2 4 4 AUD Audio Menu Any action in the Audio Menu requires the pointer
32. ion manual Bean pj VHF Communication Transceiver Revision 11 3 u KRT2 Ag 2015 6 6 3 Earphone Connection several earphones of same type can be connected in parallel The total impedance should not be less than 60 Ohms 6 6 4 External Audio Input Audio alarms 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 PINS must be connected to Battery minus GND 6 6 5 Speaker Connection The high output power for the speaker requires a_ differential interconnection This does not allow that one side of the speaker wires is grounded Both the wires have to be installed fully insulated Special intention has to be paid at gliders after retrofitting on older installations Check with a meter the resistance between one speaker wire and the case of KRT 2 for high impedance After turn on it will appear this warning on the screen in case the speaker is grounded UM Speaker grounded o Running under that condition may cause a defect 39 60 Doc Nr User Installation manual BE eae sN m 0 VHF Communication Transceiver Revision 11 3 EEUU KRT2 Ag 2015 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 or open the intercom switch indicating e Press button
33. llation For installation hints data electrical connections and mounting instructions please see section 6 Installation 9 60 Doc Nr HE plus User amp Installation manual M VHF Communication Transceiver INTENANCF GABH Revision 11 3 EEUU KRT2 Ag 2015 3 CONTROL general 3 1 Control Elements Overview Field for Listen on Audio Status Bretan two frequencies v VOX on memory mode e extern Intercom Select audio mode for Area for Volume Flag for pa es TX Transmit Intercom RX Receive 3 DIM ee Contrast Activ name en CL bam pende soe v ELL SEE VOLLI Active frequency T Stand by name i SL Battery status amp Error field SEL 531 a 1 L Standby frequency Window for Programn DUAL mode Exchange Modulation standby lt gt active Memory mode Rotation knob for Press for Set Frequency for 100 favourite Frequency MHz 1xx nn frequencies Audio levels 100kHz 1nn xnn Mem Freq 10kHz 1nn nxx ON OFF Self locking switch 1 Scanning between the Active and otandby frequencies Positioning cursor to the left when programming the station designator DUAL WATCH 10 60 Doc Nr User Installation manual DE n N VHF Communication Transceiver L X 1 Stepping through the audio menus UDINE VOL SQ VOX TX INT EXT DIM CON ua d AUDIO SIT and MIC SELECT 2 Positioning cursor to the right when programming the st
34. mic microphone type 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 25 60 Doc Nr User Installation manual BE eae sN VHF Communication Transceiver MAINTENANCE GMB Revision 11 3 EEUU oe Aug 2015 AUTO MIC level 07 lt 0 57 Rxs liB bm 8 04U bxi B 00U Mic d FREG The present recognized type will be updated Mic dyn std only if the mic setup is re entered For the std part the previous individual setup is stored when the menu was leaving The MIC submenu is terminated by pressing the AUD button Additional indications Additional indications for test purposes RxS_ RF receiver input level from Automatic Gain Control Ext External audio input voltage Mic dynor Mic std Display indicates which microphone type has been selected after entering the mic menu After firmware 6 17 or 7 02 This Symbol EE appears on right side of STBY Frequency in AUTO mode if the dynamic microphone has been recognized and activated after transmission To reactivate the intercom a short press of the PTT is required 26 60 Doc Nr User Installation manual BE eae sN VHF Communication Transceiver Revision 11 3 KRT2 Aug 2015
35. n L 3 PTT L 10 Headset 4 Standard Microfon Right Microfon R 6 reer _ Headset Right Man Intercon white 12 Intercom L 2 60cm bluc CN m SS GO Y 30cm LSP 3 31 lt n e TTL see iln vo S bie wata Ext NF 5 Aux Audio in pink RX Remote 13 TX Remota 2 PTT R 11 B PTT Right mus ie b PIT Left MUTT ra Batt Plus 7 59 Lius Batt Minus CO Js Fuse EJ STX 3 A Mic GND este HIS L Power PTT L TX Remote STX t 9 to 28V ETER Microphone L L 12 V LSP me Intercom EXE LT 4 516 II I aidant Microphone R 7 B 9 C Headset LSP I i front view male The view onto the correct side of the connectors is very confusing For orientation we recommend to use the colors only t i 3 Connector Tyco AMP Mate N Lock F138 365 0 0927231 3 C Wire cross secion lal aE RE Ball Plus Cuyo termale R LO 26566 SS male d 0525B897 1 e Al others T KRT 2 Two place Motor Glider Pe tunm dynamic mic in AUTO mode Microphone Setup R for headsets leave menu in AUTO mode 48 60 Doc Nr DE 3000 800100e Revision 11 3 Aug 2015 User amp Installation manual VHF Communication Transceiver ABE pru MAINTENANCE GMBR Electret Mikrophon Einder 3nap in O9 9745 00 035 amp 09 3747 00 0 3 1 3 GNO 2 cignal b I Binders pir OS 97 40 00 03 amp 08 674 7 00 03 1 22GMD 2 signal ke U l E
36. p correctly oriented e Installation is from the front side of the instrument panel with four 4mm screws in a 5 mm panel cut out e For installation details and drawings refer to chapter 6 8 3 Wiring Diagram 36 60 Doc Nr User Installation manual BE eae sN m 0 VHF Communication Transceiver Revision 11 3 EEUU KRT2 Ag 2015 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 330 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 4 4 11 MIC Setup When dynamic microphones are used in gliders the 8V supply voltage is switched off for power saving purposes Also if R input is not used it should be loaded or grounded and not be connected to open wires Standard microphones normally used in headsets together with dynamic microphones generally cannot be used at the same time j
37. pare amp Ext NF te t aded bu Microphone R Headset i me one de Batt GND Batt Plus S9 Remote control KRT 2 Glider Dual V3d Microphone Setup leave in L 211 not AUTO 44 60 Doc Nr Lg User amp Installation manual o M Iam LA HE L VHF Communication Transceiver MEM Revision 11 3 aii Aug 2015 45 60 Doc Nr lus User amp Installation manual d TEN 44 BES pru VHF Communication Transceiver MAINTENANCE GABH 6 8 3 3 Glider single Binder snap in Electret or dynamic 09 9748 00 03 amp 03 974 7 00 03 goose neck 1 32GND 2 signal Microfon L 3 mM gliding vie i brown L 10 i 2 diia Mm ge D PTT Left LSP 4 black T a 7 nil T TT LL l LSP 7 Headset mic dmm 1 l Microfon R 6 o 7 a mis br ZW n A RAM KRT2 PTT R f yellow Headset 14 Batt Plus 2 B Batt Minus ft C cq Fuse 3 A Batt Minus GND dis Intercom a2 Mic GND Tur Power Remote ENEE PTT L Ext NF S En slepa 9 to 28V RX Remote 13 Md an FIM E a Intercom TX Remote 2 n Ext NF n R rne RX te PIER R Microphone R L i adset gase LSP s Batt Plus Run non AUTOMATIC w n KRT 2 Motorglider Single PTT Select Microphone Setup leave with L 211 for dynamic not AUTO 46 60 Doc Nr lus User amp Installation manual DE 3000 800100e 44 BES L VHF Communication
38. ror messages are displayed in the error window in the third line H lime Time out transmission error R ChkSz Checksum error R Cmd Unknown command R Char Data error H Freq Wrong Frequency The error message disappears when a valid command or a new frequency has been input latest however after 5 seconds Remote control unit errors do not interfere with the KRI2 transceiver operation Data transmission between the transceiver KRI2 and the remote control unit KRT2 RC is checked once every minute A r in the upper right corner is displayed when there is no malfunction The KRT2 RC can also operate the KRT2 in a fully stand alone mode such the KRI2 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 34 60 I Doc Nr User Installation manual BE PN VHF Communication Transceiver Revision 11 3 EEUU KRT2 Ag 2015 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 6 8 Wiring 6 2 Telecommunication Data The following data may be required for the radio station licence AlRplus Maintenance GmbH EASA Number P N 100 90001 00 Power Output 6W NEC MEHR 6kOOASE f r 25khz
39. sets in use both the PTT L and PTT R should be tired together see also 4 4 5 I Xm PTT Switch Selection 4 6 1 Speciality of two PTT There are two different PTT assigned for each of the left and right side microphones This enables the deactivation of the not used one preventing additional noise and unintentional talking on transmission In case there is just one PTT possible both the PTT L and PT T R must be tired together see chapter 4 4 5 4 6 2 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 30 60 Doc Nr User amp Installation manual Bean pj VHF Communication Transceiver e MB MAINTENANCE GMBH KRT2 Revision 11 3 4 6 3 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
40. sing the AUD button seven times enables the turning knob to display the battery voltage 4 gt e 141 009 AIRFIELD B Ttst 12 5 EF 119 500 FREG 23 60 3 EET plus User amp Installation manual DE 10058001006 a 4 7 VHF Communication Transceiver Revision 11 3 KRT2 Ag 2015 4 4 10 SIT Side tone Pressing the AUD button eight times enables the turning knob to set the side tone volume for gliders should be set to 01 SITnn Range 0 9 4 4 11 MIC Setup This mode is for microphone setup and test only without using the PTT It is not for normal operation 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 chapter 6 6 1 Microphone Connection The MIC Setup is the last item of the Audio menu and can be accessed by pressing the AUD button nine times MIC leuel 11 lt 0 59 RxS 118dbm B B4U Ext 6 8BU By pressing the DUAL button repeatedly L R and AUTO can be selected L R means left right 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 24 60 Doc Nr User amp Installation manual B 00 pi VHF Communication Transceiver
41. the turning knob to enable certain PTT switches On transmission only that microphone will be enabled which is related to the PT T L R The equivalent indication is TX or T X1 TX2 On transmission only the PTT L R related microphone will be activated TXm x Left Right 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 Vario etc Required level is 200mVpp 6Vpp max Activation occurs for settings gt 00 and will be indicated by the flag a 00 turning off 01 lowest level without threshold 9 highest gain EXTnn Range 00 10 22 60 ee s I Doc Nr A BES lus User amp Installation manual B ass pf LA VHF Communication Transceiver Y MAINTENANCE GMBH Revision 11 3 EEUU KRT2 Ag 2015 4 4 8 DIM Display Brightness 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 DIMnn Range 01 16 e119 70 gt MENU ZELL SEE DIM3 5 a WEM MUC IN 125 000 25 000 JLE Y 4 4 9 BAT Battery test Pres
42. ust 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 37 60 User amp Installation manual VHF Communication Transceiver m 0 r T MAINTENANCE GMBR KRT2 Revision 11 3 BK RT Aug 2015 Both inputs must not be wired together L is the master Doc Nr DE 3000 800100e Copilot R Pilot L Headset Micriphone L Microphone R Klinke H Speaker scs Klinke M dynamic microphones Klinke M Klinke H 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 co pilot headset microphone is disabled A maximum of two microphones of same type may be connected to each microphone input channel 6 6 2 Speaker amp open microphone An open microphone together with a speaker and intercom is not possible Running a speaker together with an open microphone goose neck the Intercom operation hast to be turned off by setting VOX 10 or opening the intercom switch indicating e other vice a feedback from the speaker will occur 38 60 Doc Nr User amp Installat
43. 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 In gliders with active speaker use VOX 10 only 4 4 4 Manual Intercom In case of extreme cockpit noise or uncompensated microphones 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 see 4 4 7 For use in gliders the VOX has to be set to 10 for disabling the speaker control 21 60 Doc Nr User Installation manual BE eae sN m 0 VHF Communication Transceiver Revision 11 3 EEUU KRT2 Ag 2015 4 4 5 TXm PTT Switch Selection Pressing the AUD button three times enables
44. 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 modulation it becomes a small dot approximately in the centre Also if it far off centre it indicates that there is bad antenna matching 31 60 ee Sk User amp Installation manual B cape a E ms VHF Communication Transceiver oo 1 69 4 7 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 4 8 SET UP Menu During power up the MEMORY buttons must be pressed It appears protect mode just wait until it changes 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 next to the symbols Exit S E Their function is described on the display zz SET UP E ERASE Channel Space i M A Set up program exit is with the MEMORY button The unit remains powered and the normal operating mode is resumed 32 60
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