KRT2 Operation and Installation Manual
Contents
1. Dynamic Microton Motor glider O Standard Microfon Right greer i Headset Rig ht white Man 50cm hid Intercon Remote Speaker en v p Speaker a am Ld Ls Aux Audio in idi SEJR B PTT Right p ER OB bravari ry T t b PTT Left cx 9 bius 98 L Fuse STX Hs A Mic GND tiit caus Power PTT L TX Remote di 9 to 28V Microphone L 42 PTT R 2 3 Intercom em I r Ext NF HH 4S ice dnb Microphone R 7f B 9 Headset LSP mant VENAE mels Batt Plus The view onto the correct side of the connectors is very confusing For orientation we recommend to use the colors only Tow AMP Mate M Lock F133 365 0 092723 1 3 Male D D350 20 3 Connector Wire cross secion Battery ta Cen ace tamale O Oizassa 3 male 0 7528B97 1 memes KRT 2 Two place Motor Glider AWG22 0 32qmm dynamic mic in AUTO mode Microphone Setup H for headsets leave menu in AUTO mode 43 of 56 Doc Nr User amp Installation manual DE 00800085 VHF Communication Transceiver MAINTENANCE GMBR KRT2 amp KRT 2A Electret Mikrophon Os OT48 00 03 A 09 9747 00 03 Micrafon L 3 PTT L 10 PTT R 1 Headset 44 Microfon R 8 Intercom 12 Revision 9 10 For Software gt 5 00 Jun 2015 Binder sneap in Dynamic Microfen 1 3 GNO 2 cignal Binder pir OS 97 40 00 03 amp 08 874 72. seeeeseeesseseeseseeeen nennen eene nnn nenne sse nnn nnne essen 34 6 6 2 wpeaker amp open microphone a cascdevenstascsncavelavondeaserasanclavendiasedneavela endieuersiavalavetaee 35 Cao Panone C o O aa I E dH IS UM ETSNSdN DU tuU DNE 36 CO E OAT e A 36 DOS Speaker COMME COM NETTO E EE EE 36 6 7 Finally Audio Setup 20 0 0 eccccccccccccceesssseeeccecesseeessseeeccecssseeessseeececessuaeeesseeeseeesssaeeesees 37 OV MEM ON uuo E E E rere A E E E A A E ee 37 0 12 Formotor eHders dualscaters swsnscesansce MeustasastaustsaleushacttawsesMeuanaattantealeaunacsamen dt 37 Oa PONO E ETT Umm 37 OS MI ea vce 38 OUS MEM SCISCO ETE 38 D o 2 Connector Fim C ODBIOUETUOD i2 ates teste E atas but iut ulus case be teeters 38 Wy Marca desti E ma buo Ecco d dio M UID EMPORIUM DID EURUI UE 39 6 8 3 1 Two place motor aircraft connection ssseeessssssssseeeressssssssserressssssssereessssss 39 0 5 9 2 Glider two place CONMCCHON oio iecore irata ios ote uoo PR ies ubuleues pPa poH abad ae EE ad 40 s SI DR et 4 DS VOLO ING I lC sssaaa eee oa sta tudro itii se EAR 42 0 5 25 5 IMIOPOE E DOCE CUAL ostrea ed bet vate Ome Sry rene Ser ener Sau eee frre mer ern re 43 6 8 4 Wiring for dynamic microphones cccccccccssssesseecceeceeeaeesseeeeeeeeeeeaaeeeeeeceeeeeeaaas 45 D 9 COMME CHOD SUDDORE eio peau setesqn mmt Coin guNU uU Sc M Uma du vU OMIM E E 45 OO MEE ICI EO Emm 46 6 9 1 Antenna SCICCHON
3. 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 A From the designator mode only terminate just by pressing 9 for short time it 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 A M 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 56 Doc Nr User amp Installation manual Bc d P VHF Communication Transceiver Revision 9 10 Jun 2015 Termination save firmware version before 6 14 A In EDIT mode pressing MEMORY again terminates editing a
4. BE User amp Installation manual DE 000001059 J VHF Communication Transceiver or 50 are gt o VHF Communication Transceiver DUAL AUD ON COM lt gt om P N 100 0001 060 Operation and Installation Manual 1 of 56 Doc Nr aec vm lus User amp Installation manual uc nanan pr E Ex VHF Communication Transceiver Revision 9 10 Jun 2015 2 of 56 p Doc Nr User amp Installation manual AE aan E VHF Communication Transceiver Revision 9 10 KRT2 amp KRT 2A For Software gt 5 00 Jun 2015 Record of Revisions Revision Date Subject 8 Dm 2012 DmencMesnhoreGNDaW 1 Nov 2013 New favourites management EIN Mai 2014 Menu limitation PTT Mic assignment Installation limitations Text 10 1 corrections Mic AUTO enhancement 98 Juyz0i4 Add chapter 66 2 and 6 8 3 1 add drawing motorgider 98 Nov20 4 Update Insalation and Limitations Section 301 Jun 2015 Recommendations d LC List of Service Bulletins SB 9 7 Service Bulletins have to be inserted in the manual and entered in the table Date Date SB Number Issued Inserted 2 of 56 Doc Nr User amp Installation manual Bean onions VHF Communication Transceiver pi i n Revision 9 10 KRT2 amp KRT 2A For Software gt 5 00 Jun 2015 Unit overview Item No Product Overview Basic Version Introduction of e
5. gt 5 00 Jun 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 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 45 of 56 Doc Nr User amp Installation manual Bean e VHF Communication Transceiver ERE s mi m MAINTENANCE pMBR KRT2 amp KRT 2A Revision 9 10 For Software gt 5 00 Jun 2015 6 9 Antenna 6 9 1 Antenna Selection A 50 Ohms impedance VHF COM antenna is required 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
6. 00 03 Vv3 SND 2 signal Standard SECTOR L eft a m mm eS ae ae ee an MN Dynamic Microfon gliding mic EB oe Seek ee FE rer eee a Standard orange Microfon Right Headset Right Man vv Purl Intercon a eo e 5 hu ER j LSP i5 E Speaker a iL ee are i a tents Ext NF amp Aux Audio in RX Remote 3 TX Remote 2 uz p PTT Right H D PTT Left Batt Plus CP SS ee Batt Minus eU 1 Fuse V GA M Mic GND Batt Minus Power PTTL TX Remote STX P Nu 9 to 28V PTT R Microphone L A m es 42 v ois LSP ASES Intercom 4 3 ciii Ext NF 4 5 6 ird Microphone R 8 8 E Headset i run LSP Lr i a Batt Plus front view male dolos The view anto the correct side of the connectors is very confusing Wire cross secian Battery amp AMVGZD 0 61qmm All others AWG22 0 329gmm For orientation we recommend to use the colors only Connector TycaAMP Mate M Lock F1386 365 0 0927231 3 Male 0 0350720 4 Contacts female 0 0826BB85 3 male O 0926097 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 44 of 56 Doc Nr User amp Installation manual BE nOD VHF Communication Transceiver rers MAINTENANCE pA DH Revision 9 10 KRT2 amp KRT 2A For Software
7. 3A BA Intercom 12 Microfon R nat far dynamic mic Power bes Ext NF S 9 to 28V RX Remote 13 nami d PT Ras P 5 Batt Minus GND MIC GND PTT L PTT R Intercom RX Remnte Headset TX Remote Microphone L LSP Ext NF Micraphone R Balt Plus 7 4 LULLU Bat tGND Batt Minus LSP GND Batt Plus Remote control KRT 2 Glider Dual V3c Microphone Setup leave in L 211 not AUTO 40 of 56 Doc Nr n He plus User amp Installation manual cr MM i VHF Communication Transceiver AINTENANCE GMBH Revision 9 10 Jun 2015 6 8 3 3 Glider single Binder snap in Microfon 09 9748 00 03 amp 09 9747 00 03 1 32GND 2 signal Microfon L 3 1 PIEL M y b PTT Left M Headset 14 black Speaker if required Batt Plus e Batt Minus 1 9 4 Fuse Microfon R 6 i SA Intercom 12 a Power oe Ext NF 5 9 to 28V RX Remote 13 12V TX Remote 2 PTT R red Batt Minus GND Mic GND 8 TX Remote PTT L l Microphone L PTT R LSF Intercom i Ext NF i ds i Microphone R eadset LSP4 Batt Plus BATT GND KRT 2 Glider Single V4c Microphone Setup leave with L 211 not AUTO 41 of 56 VHF Communication Transceiver Doc Nr n HE plus User amp Installation manual d n naan i AINTENANCE GMBH Revision 9 10 Jun 2015 6 8 3 4 Motor
8. 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 19 of 56 Doc Nr User amp Installation manual BE On PT VHF Communication Transceiver KA MAIN TEN NCE vi Revision 9 10 KRT2 amp KRT 2A For Software gt 5 00 Jun 2015 4 4 5 TXm PTT Switch Selection Pressing the AUD button three times enables the turning knob to enable certain PTT switches On transmission only that microphone will be enabled which is related to the PTT L R TXm x Left Right Both 4 4 6 INT Intercom Volume Pressing the AUD button four times enables the turning
9. 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 10 highest gain EXTnn Range 00 10 4 4 8 DIM Display Brightness Batt voltage 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 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 56 lA HE pies User amp Installation manual ea aoninee VHF Communication Transceiver AlN TENA MAINTENANCE Gi fon Revision 9 10 KRT2 amp KRT 2A For Software gt 5 00 Jun 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 RHange 0 9 4 4 11 MIC Setup This mode is for microphone setup and test only without using the PTT It is not for norm
10. 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 modulation 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 56 Doc Nr User amp Installation manual Bean onions VHF Communication Transceiver Revision 9 10 KRT2 amp KRT 2A For Software gt 5 00 Jun 2015 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 56 I Doc Nr pius User amp Installation manual A en fad Hi Ee VHF Communication Transceiver Bex MAINTENANE MAINTENANCE GA deti Revision 9 10 KRT2 amp KRT 2A For Software gt 5 00 Jun 2015 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 freque
11. 2 Standard Microphone Inputs Auxiliary Audio Input e DUAL Watch Function 3 of 56 Doc Nr User amp Installation manual BE ooed VHF Communication Transceiver KRT2 amp KRT 2A Revision 9 10 Jun 2015 TABLE OF CONTENTS 1 2 3 4 em imn C 6 EE PETIERE 6 1 2 PO DUCV IANO 9S oci isUxcoauc tenetis aos deu RDUM E E CEN NA ENUUEE 7 I ME Cro dritte 8 l4 KRIZ Ir nsceiver DEODGPBIOS eee ne eee en ene ee nee ee een re ae 8 Jat TIO MIANN MT 9 2k AUST ATOM e E E E E E E 9 OONTROL GENTO A r E E E E EE E E EERE EEA 9 S MEME Contool TICs Oy a1 A nair E 9 I D a E mn 11 OPERATION ore ae nee ern ene es ee ee ee eee eee 13 SER Ue E 13 IN COTE Ue Dmm 13 LS Frea ne y Se DINER 13 4l Direct Freguency Selecthon RTT T 14 4 3 2 Frequency Selection from the Favourites List 2 0 00 cccccceccsccccccceeesseeseeeeeeeeeeseeeees 14 L3 SONNE ANG Edi Favourites secsi orosenie ine aS E Eai i 15 PRU FA ISI EE TM 18 d MER IS PUn NT E T 18 a SD GUC 18 4 4 3 VOX Intercom Voice Trigger Level Setting 0 ce cccccccccccceeesseeseeeeeeeeeaaeeeeees 19 Le e Manadl IMT IURE TETTE 19 Ro Meier SAC le Selecon serimi vince ES 20 AAO JINT Iniercont Voe acses EE 20 4 4 7 EXT External Audio Input Volume 2 00 0 ccccccccssseeseeecceee
12. Audio levels standby active set Mem Freq M BES lus User amp Installation manual DE o Bonde pf m pt VHF Communication Transceiver Jun 2015 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 programming 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 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 56 p Doc Nr User amp Installation manual AE aan E VHF Communication Transceiver Revision 9 10 KRT2 amp KRT 2A For Software 55 00 Jun 2015 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 aft
13. UTO 3 of 56 Doc Nr User amp Installation manual BE n PT VHF Communication Transceiver md b EN T7 Ai it N NCE ix B Revision 9 10 KRT2 amp KRT 2A For Software 25 00 Jun 2015 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 Headset C Microfon R RX PC Ext NF Intercom LSP PTT R Microfon L PTT L TX PC Batt Minus GND 2 Q Micro GND OMODA If manual intercom is not used pin 12 should be grounded 38 of 56 Doc Nr He pilus User amp Installation manual cr MM i VHF Communication Transceiver AINTENANCE GABH Revision 9 10 KRT2 amp KRT 2A For Software gt 5 00 Jun 2015 6 8 3 Wiring Diagram 6 8 3 1 Two place motor aircraft connection Standard Mer Left Microfon L 33 PTT L 10 T Headset as Microfon R 6 Intercom 12 Ij Standard Microfon Right 1 Headset Right Man Intercon l l if manual intercom is not used Remote _ 30cm simblify installation C I lt LSP i4 LSP F LI yall Ext NF 5 EI vieler Tre n if required NFS HM RE A Audio in RX Remote 13 H 2 TX Remote 2 preen ed p PTT Right PTT R 1i L3 9 T oe gt BPTT Left Batt Plus E rel 4 a a she Batt Mi
14. WANTED FREQUENCY lt 1kKHz at m 0 1kHz MODULATION DUTY 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 BANDWIDIH 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 Deviation of NF output lt 6 dB AGC CHARACTERISTIC from 10 uV to 10 mV SQUELCH Automatic Squelch adjustable SPURIOUS RESPONSES gt 80 dB 54 of 56 Doc Nr User amp Installation manual Bean onions VHF Communication Transceiver j E ee a da im i em MAINTENANCE GMBH KRT2 amp KRT 2A Revision 9 10 amp For Software 55 00 Jun 2015 DISTORTION 350 2500Hz lt 25 at rated power 85 33dBm lt 10 at 10dB below rated power 70 33dBm 55 Of 56
15. al 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 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 MEMORY FREQ F CX y 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 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 56 Doc Nr User amp Installation manual Bean onions VHF Communication Transceiver Revision 9 10 KRT2 amp KRT 2A For Software gt 5 00 Jun 2015 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 th
16. at 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 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 6 8 3 33 of 56 Doc Nr User amp Installation manual Bean onions VHF Communication Transceiver 2 Revision 9 10 KRT2 amp KRT 2A For Software gt 5 00 Jun 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 When dynamic microphones are used in gliders the 8V supply
17. c Nr User amp Installation manual Bean onions VHF Communication Transceiver Es E Pr NTENA M E GABI Revision 9 10 KRT2 amp KRT 2A For Software gt 5 00 Jun 2015 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 after 2014 62mm Depth 144mm plus rear panel plugs 60mm 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 13 8VDC e Transmitter 2 0 A typ e Receiver 0 13A e l lumination 0 02A e Audio Power amp Up to 1A emergency operation 9 VDC Power Consumption Standby 1 6W Transmit 30 W Frequency Range 118 000 186 995 MHz Fuse external fuse required 3 A slow blow 53 of 56 I Doc Nr User amp Installation manual BE eames VHF Communication Transceiver KRT2 amp KRT 2A Revision 9 10 For Software gt 5 00 Jun 2015 Compass Safe Distance TRANSMITTER mn awana 2 4 W minimal 10 96 at 70 modulation 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 35dB at 70 Modulation index UN
18. 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 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 46 of 56 Doc Nr User amp Installation manual Bean onions VHF Communication Transceiver ERE s mi m MAINTENANCE pMBR KRT2 amp KRT 2A Revision 9 10 For Software gt 5 00 Jun 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 t
19. ctive UJ e external Intercom Switch active Er PLL Internal error no transmission Return the transceiver for maintenance Er ADC Internal error Return 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 Internal error reception corrupt Return the transceiver for maintenance Key Block Internal error unit not usable Return the transceiver for maintenance 12 of 56 VHF Communication Transceiver gt Doc Nr He plus User amp Installation manual c RN me INTENANCE GABA Revision 9 10 Jun 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 Device name KRT2 Software Version e g V2 0 is SR J AT Feely 2 E Mai i intenance Software Version e g V2 0 example The unit then starts in the normal operating mode using and displaying the data last used 4 3 Frequenc
20. e 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 SITO1 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 dynamic 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 AUTO MIC leyvel 65 Mm D 0 89 RxS5 r amp dbn a LExt 4 ag Mic dyn 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 22 of 56 i Doc Nr Us
21. eeeeeseeeceeeeeeaeeeeeees 20 4 4 8 DIM Display Brightness Batt voltage eesseseeeeeeeeee 20 44 9 CON Display Contrast ERE 20 TN SAE SIGS O E E E E A A S 21 dA MIC i eee ee ee EE 21 gA III e 4i Senne ee ne ee ere E ee eee 23 to DUAR W e E E es 24 Zo Xransmnttcr O T O E E E ES 26 Jd SCE CMON e r E E E E oat Zt LN MEEMEO OUECAl SICS WONG age scecene renee see scteaaeunceatae E E 27 4 8 Resetting to factory settings ssseeseessssssssssseeeeee nennen eene nnne nnns nnn nnne essen nnns 28 TR SET TOP Mo M 29 4 9 1 ERASE Erasing the Favourites List cccccccccccccccececeeececeeeeeessessseeeeeeeeeeeeeees 29 A927 RAS 1 Doescerupeideoescntdo ven aoc co uedame vce easeaeacsiaducteaaasiodeasatenseeesneceacatadacecesationes 30 gipes cj 30 LUG EUAN ON T 32 oS MEE P CUIR PRU EET E Em 32 6 2 Telecommunication Data seeesesessssssssseeeeeeeeeee nennen enne nennen nnn nnne nennen nnns 32 ON MEME e P OLUE UIS AN EUER 32 4 of 56 Doc Nr User amp Installation manual D ORO OUS VHF Communication Transceiver KRT2 amp KRT 2A Revision 9 10 Jun 2015 6 4 Unpacking and Inspecting the Equipment eeeeeeeeeseseeeeeeemnmneeeeennn 33 MED c 33 OMEN Senses BIER Rm 34 6 6 1 Microphone Connection
22. er amp Installation manual BE cae PT 07 VHF Communication Transceiver Revision 9 10 KRT2 amp KRT 2A For Software gt 5 00 Jun 2015 The MIC submenu is terminated by pressing the AUD button Additional indications Additional indications for test purposes HXO uus HF receiver input level trom Automatic Gain Control Ext External audio input voltage Mic dyn or 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 4 4 12 Menu locking For school operation the menus area T Xm to MIC setup can be locked To lock or unlock the button combination AUD amp FREQ hast to be pressed simultaneously for 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 Available Locked and not available 23 of 56 Doc Nr User amp Installation manual BE OUO IDE VHF Communication Transceiver Revisi 9 10 Jun 2015 4 5 DUAL Watch Because the communication transceiver KRT2 contains only one receiver DUAL watch is achieved by alternating between the Active and otandby frequencies The DUAL butt
23. er 2 min continuous operation 125 100 Active frequency EE UUOO0O0OQ Active frequency station Displayed when frequency designator and designator is stored in the favourite list Receiver volume level When AUD was pressed default after a certain time the corresponding Audio delay Menu item and setting Is displayed oquelch Voice operated intercom DIM Display brightness ee EXT Volume of external devices During transmitter operation BREMEN Standby frequency station Displayed when frequency designator and designator is stored in the favourite list 11 of 56 User amp Installation manual DE UIS VHF Communication Transceiver BES Revisi 9 10 BEEN ud i T i E D Jun 2015 Display Meaning Remark 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 BEEN 134 825 iower 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 a
24. erresire monna EE AES 46 6 9 2 Installation Recommendation sseeseesssseseeseeeeee nenne eene nnne eene 46 6 10 MICEODBODS OCC aL oeeie ean o da ao some ated ORA I od O UM NU SUM a E ORAN 47 6 11 Posteanmstallation e OK e S 47 6 12 Ce E a E E E E E E 48 6 13 ACCO OOS pea E E E EE E E E AE E T 48 6 14 li np ea cence escent E E 49 DUAL Dinen ON e E E E EE UNS LU eres ERU 49 0142 Tnstallation TiS COG ING re siere terncscoaseansetnnene rer rere O E EOR 50 O MAMENANG ea a E Ee A E ee eee ee ee 51 Vel Su TE Ta a E NETTO m A E 51 To MRED all etcdtassace case sheeecas nase Hina ort E oda toU ent M MM ce cos oi aeanotos UR sqeeaisesqes neat 51 NE Rm 51 0 ANNE e E docuecanixetc 52 Sl Prequeney 7 Channel See ule semccccsccsactessansrecescoaseresnemntacads aopaasmeneeercn oraren e 22 MEME CIC Bir t 53 5 of 56 Doc Nr User amp Installation manual BE ooed VHF Communication Transceiver f s E rnm TT F MH KRT2 amp KRT 2A Revision 9 10 Jun 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 KR T2 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 56 Doc N
25. glider single Binder snap in li 09 9748 00 03 amp 09 9747 00 03 Microfon 1 3 GND 2 signal Microfon L 3 qjL im brown L ag T CHER AM Tr motoring blue b PTT Left NS LSP I black m p oue te see Y LSP 7 if required Headset mic o Microfon R 6 PTT R at Headset 14 Batt Plus J red e LL Batt Minus 8j Fuse 3 A e Batt Minus GND Intercom 12 Mic GNDf j a Power ie Rempe NEE PTT L ENG n PTT R Microphon L me 9 to 28V Latico 4 LSP RE i ntercom oe ax remoiel a C EXC PTT R 19 ean z 3 Vann NN M i Headset Lsp Batt Plus 8 Run non AUTOMATIC BATT GND KRT 2 Motorglider Single PTT Select Microphone Setup set L R as required for headset leave not in AUTO mode 42 of 56 ABE pru MAINTENANCE GMBR Doc Nr User amp Installation manual DE 00800085 VHF Communication Transceiver KRT2 amp KRT 2A Revision 9 10 For Software gt 5 00 Jun 2015 6 8 3 5 Motor glider dual Dynamic Mikrophon Micrafon L 3 PTT L Headset 44 Microfon R 6 Intercom 12 oO M LSP LSP T Ext NF 8 IX Remote 13 TX Riemata 2 PTT RA att Plus qu Batl Plus 8 Batt Minus CD o Mo Einder anap In OB D748 00 O3 amp 06 974 7 00 03 1T J GND 2 siqnal RBin er snap in DH cz4R ID DG OB AeA DO 0 1 39GND 2 signal Dynarmic Microfon
26. llation A certified maintenance shop should perform the wiring or as required by local national regulations For the wiring diagram refer to chapter 6 8 6 2 Telecommunication Data The following data may be required for the radio station licence m 6kOOASE f r 25khz channel spacing TL PH 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 56 Doc Nr User amp Installation manual Bano E VHF Communication Transceiver Revision 9 10 Jun 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 e Cable length must be such that connectors are accessible for repair e The wiring to the transceiver must be installed such th
27. mmunication Transceiver rra MAINTENANCE pA D Revision 9 10 KRT2 amp KRT 2A For Software 55 00 Jun 2015 otandby and Active frequencies can be exchanged when in the DUAL mode The transmitter operates on the Active frequency only summary select the Standby frequency to be monitored in addition to in use frequency With the AUD button and turning knob set SQnn to 02 or higher With the DUAL button activate the DUAL watch function When there is no reception on both the Active frequency and the otandby frequency the receiver scans both frequencies 5 times per second When scanning the Active frequency always has priority Deactivate the DUAL watch function with the DUAL or FREQ or MEMORY buttons 25 of 56 3 EE hus User amp Installation manual DocNr ooo pe pu VHF Communication Transceiver MAINTENANCE GABH Revision 9 10 xi 7 KAT 2A For Software gt 5 00 Jun 2015 4 6 Transmitter Operation The unit transmits on the active frequency upper line as long as a PIT press to talk switch is pressed QUAL AUD woe s M MEMORY FREQ Y Y Transmission Heception X 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 unin
28. n be sorted in alphabetic order see 3 3 3 A MI 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 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 blinking cursor will show up under the extreme left character _ EA AUD The turning knob selects the D ore 1 Onl B5 desired character 119 523 The AUD button positions the curser one character to the MEMORY A FREQ right The DUAL button gt positions the cursor one y character to the left and simultaneously erases this character The station designator can consist of maximum 8 characters 15 of 56 Doc Nr User amp Installation manual DE 008901008 VHF Communication Transceiver Revision 9 10 Jun 2015 To change frequency just press the FREQ button and follow the normal direct input procedure to edit the frequency
29. ncy 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 Y FREQ Set up program exit is with the MEMORY button The unit remains powered and the normal operating mode is resumed A Remark B VA 4 9 1 ERASE Erasing the Favourites List When in the SET UP Menu select the ERASE submenu with the LZ MEMORY LZ Y FREQ Erasing the favourites frequency and designator starts after the LAN 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 56 Doc Nr User amp Installation manual Bean onions VHF Communication Transceiver k KRT2 amp KRT 2A Revision 9 10 For Software 55 00 Jun 2015 4 9 2Channel Spacing When in the SET UP Menu pressing the FREQ S button will change the KRT2 into the Channel Space submenu Le oe or See es EE MEMORY LZ Y FREQ 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 freq
30. nd SAVE v will show up SAVE is available for 20 seconds and must be acknowledged by the D 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 7 00 Button 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 SAVE now with use D to save it do nothing for cancelling X After save it comes the question for sorting Yes amp 4 No MEMORY or do nothing 17 of 56 Doc Nr User amp Installation manual Bean onions VHF Communication Transceiver Fi z F d e MAINTENANCE GMBH Revision 9 10 xii 7 KAT 2A For Software gt 5 00 Jun 2015 DUAL AUD Any action in the Audio Menu LL requires the pointer to be next KRT2 to the Audio menu window see n picture When the pointer is next to gt gt Fee the Standby frequency window the VOLS lt NEM pointer can be repositioned by 13A 20G pressing the AUD button once MEMORY A FREQ VOLnn is the Audio menu default display No action on any control for M more than 10 seconds will result in the VOL nn display Audio Menu i
31. nus map ago RTT Fuse C T5 oN an E Batt Minus P Mic GND i tears awer PTTL I 2 TX Remote STX dut 9 to 28V prrala Microphone L 12v S LSP afele ipi merone olean MASC TA amp Microphone R 7 feila ee fia L s ia ial usps Ei H Ratt Plus Ena front view male i He The view onto the correct side of the connectors is very confusing eS m Fer orientation we recommend to use the colors only K d i Il ad Connector Tyco AME Male M Lock F138 3655 D 0827231 3 Male 0 033507 20 4 OCIO Wire cross secion Cantacts famala 0 0926895 0 mala 0 0926897 1 3 Battery amp ANS 20 0 61gmm All others KRT 2 Twa place Motor AWG O 32gmm Microphone Setup set L R as required for headset leave not in AUTO 39 of 56 Doc Nr nc plus User amp Installation manual I H rex VHF Communication Transceiver M AINTENANCE GMBR Revision 9 10 KRT2 amp KRT 2A For Software gt 5 00 Jun 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 5 Binder snap in Microfon 09 9748 00 05 amp 09 9747 00 03 1 3 GND 2 signal Microfon L 3 dq Brown a _ PEE 5 PTT Left Headset 14 CV black LSP d L i B s sd peaker Y LSP T lid i L if required lt lt SEE su bue 5 PTT Right Batt Plus a d Batt Minus L1 Mic GND wo Fuse v
32. on 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 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 NN BREM TMA DUALY Active frequency reception otandby frequency reception 24 of 56 Doc Nr User amp Installation manual B 00 oE VHF Co
33. on 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 6 13 Accessories Suitable accessories such as antennas cable sets and switches can be 48 of 56 Doc Nr User amp Installation manual DE 008004085 VHF Communication Transceiver KRT2 amp KRT 2A Revision 9 10 amp For Software gt 5 00 Jun 2015 purchased at our online shop on http www dittel avionik de or from other avionics suppliers 6 14 Drawings 6 14 1 Dimensions MEMORY 4 FREG 49 of 56 p Es piss User amp Installation manual v a VHF Communication Transceiver MAINTENANC MAINTENANCE Gi ah Hevision 9 10 KRT2 amp KRT 2A For Software gt 5 00 Jun 2015 6 14 2 Installation Directions Connection Area Panel Cut out Mount demount the rotation knop Never pull the button by force or press it onto the axis 50 of 56 Doc Nr User amp Installation manual Bean e VHF Communication Transceiver Revision 9 10 KRT2 amp KRT 2A For Software gt 5 00 Jun 2015 7 Maintenance 7 1 Periodic Maintenance No scheduled servicing tasks are re
34. quired 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 51 of 56 I Doc Nr User amp Installation manual BE aa SUEDE VHF Communication Transceiver f ym at E j Revision 9 10 KRT2 amp KRT 2A For Software gt 5 00 Jun 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 1180088 839 1800 1180160 839 180055 118 0250 25 116025 118025 1180250 833 11800 AB 1180833 833 1180985 1180406 839 11800 J 1180500 839 1805 J 1180588 839 11800 Z3 1180660 833 11805 1180750 833 118080 4 9 1180883 833 118085 11809006 839 11800 116100 839 18405 etc eic etc etc mr 52 of 56 Do
35. r User amp Installation manual BE ooed VHF Communication Transceiver P b EN ree pm KRT2 amp KRT 2A Revision 9 10 amp For Software gt 5 00 Jun 2015 1 2 Abbreviations Abb Description Definition Push to Talk Transmitter activation VOX Voice operated intercom Voice level setting for the activation of the intercom Intercom level Intercom volume level setting 7 of 56 Doc Nr User amp Installation manual Bean onions VHF Communication Transceiver Jun 2015 1 3 Customer Service In order to process returned units most expeditiously please fill in the form Reshipment to be found under Service 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 htto 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 of 56 VHF Communication Transceiver Doc Nr HE 2 plus Use
36. r amp Installation manual M INTENANCE GABH Revision 9 10 KRT2 amp KRT 2A For Software gt 5 00 Jun 2015 2 Installation limitation The conditions and tests required for E TSO approval of this article are minimum performance standaras 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 Installation For installation hints data electrical connections and mounting instructions please see section 6 Installations 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 N i for Area for Volume x Squelch Flag for VOX TX Iransmit o Intercom RX Receive aa DIM E n Contrast Acti a Active marker a NN lt Active frequency Battery status amp Error fie Standby frequency otand by area Window for MEMORY A FREQ Set Frequency MHz 1xx nn Program 100kHz 1nn xnn DUAL mode v 10kHz 1nn nxx Modulation Memory mode tF for 100 favourite set Frequency frequencies Exchange set
37. r 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 3o of 56 Doc Nr User amp Installation manual Bean onions VHF Communication Transceiver Fi ae f Em nm TENA Wee TRUE Revision 9 10 KRT2 amp KRT 2A For Software gt 5 00 Jun 2015 6 6 3 Earphone Connection oeveral 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 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 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 opecial 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 KRI 2 for high impedance 36 of 56 Doc Nr User amp Installation manual Bean onions VHF Communication Transceiver Fi pm f Em nm TENA Wee TRUE Revision 9 10 Jun 2015 6 7 Finally Audio Setup Thi
38. riggered 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 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 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 47 of 56 User amp Installation manual Doc Nr ae DE 3000 800100e VHF Communication Transceiver Revision 9 10 Jun 2015 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 stati
39. s 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 AUD 4x for T Xm 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 1 2 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 Setto 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 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 A
40. tems 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 4 4 2 SQ Squelch Pressing the AUD button once enables the turning knob to change the squelch level values Sann Value range 01 10 The Squelch setting is depending on several factors 18 of 56 Doc Nr User amp Installation manual B 00 oE VHF Communication Transceiver Hevision 9 10 KRT2 amp KRT 2A For Software gt 5 00 Jun 2015 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
41. tentional long transmissions stuck microphone the transmitter is switched off after two minutes and the display changes from TX to le 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 dependant 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 26 of 56 Doc Nr User amp Installation manual Bean onions VHF Communication Transceiver Revision 9 10 KRT2 amp KRT 2A For Software gt 5 00 Jun 2015 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 consequenily the radio has to be returned to the factory 4 7
42. uency 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 R ChkS Checksum error R Cmd Unknown command R Char Data error R 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 KHRT2 transceiver operation Data transmission between the transceiver KRT2 and the remote control unit KRT2 RC is checked once every minute A r in the upper right 30 of 56 User amp Installation manual Doc Nr eee DE 3000 800100e VHF Communication Transceiver foe i ET Revision 9 10 Jun 2015 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 56 I Doc Nr User amp Installation manual BE aa SUEDE VHF Communication Transceiver Revision 9 10 KRT2 amp KRT 2A For Software gt 5 00 Jun 2015 6 Installation 6 1 Installation Hints The following hints should be considered for insta
43. 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 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 34 of 56 Doc Nr User amp Installation manual Bean onions VHF Communication Transceiver dmn e em M MAINTENANCE GMBI KRT2 amp KRT 2A Revision 9 10 amp For Software gt 5 00 Jun 2015 Copilot R Pilot L Headset Microphone R Micriphone L KinkeM a dynamic microphones Klinke M Klinke H Klinke H Speaker 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 speake
44. y Selection There are two different frequency selection methods e Direct Input e Selection from the favourite list index 0 99 13 of 56 I Doc Nr plus User amp Installation manual DA VHF Communication Transceiver IAT EAN MAINTENANCE Gs ARH Revision 9 10 Jun 2015 4 3 1Direct Frequency Selection The Standby Frequency is set with the turning knob in 3 different ranges The selected range is highlighted and can be changed with the FREQ button Rx 11 12m Frequency ranges are 1xx nnn FRAME ED LIC IL e 1 nn xnn CRM 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 standby Frequency window it will be repositioned with the first pressing of the FREQ button MI Exchanges the Active and otandby 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 56 Doc Nr fal HE gius User amp Installation manual o NM VHF Communication Transceiver AINTE MAINTENANCE E GMBH Revision 9 10 Jun 2015 The favourite list designators ca
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