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Operation and Installation Manual

KRT2 VHF-Communication Transceiver

Doc.-No: KRT2.A-MAN.en
Rev. 0101

Page

10

3. CONTROL general

3.1 Control elements overview

Figure 1: KRT2-S Front View

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Summary of Contents for KRT2-L

Page 1: ...MAN en Rev 0101 Page 1 KRT2 S KRT2 L KRT2 P VHF Communication Transceiver 285942 xx xx xx xx KRT2 S Standard 57mm 285945 xx xx xx xx KRT2 L Mini Landscape 286048 xx xx xx xx KRT2 P Mini Portrait 28594...

Page 2: ...llation Manual KRT2 VHF Communication Transceiver Doc No KRT2 A MAN en Rev 0101 Page 2 Record of Revisions Revision Date Topic 0100 24 03 2017 Initial Release 0101 16 01 2018 FCC supplements Table 1 R...

Page 3: ...KRT2 VHF Communication Transceiver Doc No KRT2 A MAN en Rev 0101 Page 3 Service Bulletins SB Service Bulletins must be inserted in the manual and added to this table No SB No Rev Release date Date add...

Page 4: ...uency selection 17 4 3 2 Frequency selection from favourites list 18 4 3 3 Storing and editing favourites 18 4 4 AUD Audio menu 20 4 4 1 VOL Volume 20 4 4 2 SQ Squelch 20 4 4 3 VOX Intercom voice trig...

Page 5: ...Wire Gauges 38 6 9 2 Connector Pin Configuration 38 6 9 3 General hint 39 6 9 4 Wiring diagrams 40 6 9 5 Wiring for dynamic microphones 46 6 9 6 Connection support ST1 mating connector 46 6 10 Antenna...

Page 6: ...ns 50 Figure 14 KRT2 S panel cutout 51 Figure 15 KRT2 P KRT2 L panel cutout 51 List of Tables Table 1 Record of Revisions 2 Table 2 Service Bulletins 3 Table 3 Acronyms 7 Table 4 KRT2 Controls 13 Tabl...

Page 7: ...ry due to radiation or fire CAUTION Non compliance may cause damage or incorrect operation of the transceiver INFORMATION 1 2 Acronyms Abbreviation Description Definition BAT Battery Electrical Check...

Page 8: ...m Information concerning software updates is available under support krt tq avionics com 1 4 KRT2 Transceiver properties VHF airborne transceiver Frequency range 117 975 to 137 000 MHz Channel spacing...

Page 9: ...ng instructions please see section 6 In stallation 2 2 Aircraft Radio The KRT2 was designed as a closed unit for installation in a cockpit environment of the general avia tion with the following limit...

Page 10: ...Operation and Installation Manual KRT2 VHF Communication Transceiver Doc No KRT2 A MAN en Rev 0101 Page 10 3 CONTROL general 3 1 Control elements overview Figure 1 KRT2 S Front View...

Page 11: ...Operation and Installation Manual KRT2 VHF Communication Transceiver Doc No KRT2 A MAN en Rev 0101 Page 11 Figure 2 KRT2 P front view...

Page 12: ...ev 0101 Page 12 Figure 3 KRT2 L front view All functions and performances of the normal size unit 57mm round and the Portrait format Mini are identical The only differences are the text areas on the d...

Page 13: ...mming the station identifier FAVORITES 1 Frequency and identifier selection from the favour ites list 2 Programming of favourites frequency and identifi er EXCHANGE Exchange of the Active and Standby...

Page 14: ...after a certain time delay When AUD is pressed the corresponding Audio Menu item and setting is displayed DUAL DUAL function is activated DUAL function is deactivated by DUAL FREQ or MEM 03 MEM Favour...

Page 15: ...opera tion Table 6 KRT2 Menu Levels 3 4 Self test error reports Display Meaning Remark Er_PLL Internal error no transmission Return the transceiver for maintenance Er_ADC Internal error operation limi...

Page 16: ...de 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 O...

Page 17: ...cted range is high lighted and can be changed with the FREQ button Frequency ranges are 1xx nnn 1nn xnn 1nn nxx Press the FREQ button once or several times until the desired frequency range is highlig...

Page 18: ...dentifier of a favourite can be edited First press the button and go to the desired favourite list position to be edited using the turn ing knob index 00 99 Press the MEMORY button a second time and E...

Page 19: ...yed in the program window with nn being the running index After a 6 seconds time out or by ending the sort the transceiver resumes its normal operating mode When the MEM button is pressed at the time...

Page 20: ...VOL Volume Turning the turning knob changes the receiver volume VOLnn Range 01 20 The VOL setting only concerns the receiver and not the intercom system In tercom volume values are set in the INT audi...

Page 21: ...witch it off 4 4 4 Manual Intercom With cockpit loud background noise or with uncompensated microphones the Intercom can be con trolled manually by using an external switch Therefore the VOX system mu...

Page 22: ...l audio input volume External audio inputs can be audio alarms voice alarms Vario etc The required level is 200mVpp 6Vpp max Activation occurs for settings 00 and will be indicated by a 00 turning off...

Page 23: ...setup and test only without using the PTT It is a service mode and it is not designed for normal operation Each of the two microphone input channels can be configured individually which enables diffe...

Page 24: ...levels 10 and 11 are special settings for low microphone levels like dynamic micro phones often used in gliders Level 10 is used for non amplified Electret microphones with an 8 volt supply voltage L...

Page 25: ...the microphone menu is entered This Symbol appears on right side of STBY Frequency in AUTO mode if the dynamic microphone has been recognized and activated after transmission In that case the intercom...

Page 26: ...h 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 and the receiver r...

Page 27: ...ns TX 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 w...

Page 28: ...warnings and in case of hardware failure different error reports will be displayed here The warnings are BAT Low battery voltage becomes active 10 5V At transmission A match Bad antenna match or defec...

Page 29: ...factory set tings takes place When resetting is completed DONE is displayed 4 8 SET UP Menu During power up the MEM button must be pressed The message protect mode is displayed just wait until it chan...

Page 30: ...er the button has been pressed again This procedure may last a few minutes during which time the message ERASING is displayed All INFO frequencies and identifiers that were stored on delivery are lost...

Page 31: ...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 or...

Page 32: ...allation in an aircraft The article may be installed only according to 14 CFR part 43 or the applicable airworthiness requirements The development assurance level for the software refer chapter 2 3 Qu...

Page 33: ...n be determined by turning the equipment off and on the user is encour aged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Incre...

Page 34: ...ling the unit in the vicinity of heat sources Sufficient air circulation is required There must be sufficient space for cables and connectors Avoid sharp bends and wiring close to control cables Cable...

Page 35: ...in 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 Standard microphones normally us...

Page 36: ...rwise a feedback from the speaker will occur 6 7 3 Earphone connection Several earphones of same type can be connected in parallel The total impedance should not be less than 60 Ohms 6 7 4 External au...

Page 37: ...l 3 to 10 so that indication is just exceed ing half the maximum value Leave the menu in position L not AUTO 6 8 2 For motor gliders dual seaters For change mode motoring headset gliding dynamic micro...

Page 38: ...Page 38 6 9 Wiring 6 9 1 Wire Gauges Supply lines Power GND AWG20 0 61 mm Control lines AWG22 0 38 mm All wires must be aviation certified 6 9 2 Connector Pin Configuration Figure 7 Connector pinout...

Page 39: ...onnector on the KRT2RC is used for the connection to the KRT2 6 9 3 General hint The following drawings are not covering all possible configurations There are many different micro phones with sometime...

Page 40: ...tallation Manual KRT2 VHF Communication Transceiver Doc No KRT2 A MAN en Rev 0101 Page 40 6 9 4 Wiring diagrams Two place motor aircraft connection Microphone Setup set L R as required for headset do...

Page 41: ...Operation and Installation Manual KRT2 VHF Communication Transceiver Doc No KRT2 A MAN en Rev 0101 Page 41 Glider two place connection Microphone Setup leave in L 11 not AUTO...

Page 42: ...Operation and Installation Manual KRT2 VHF Communication Transceiver Doc No KRT2 A MAN en Rev 0101 Page 42 Glider single Microphone Setup leave with L 11 for dynamic not AUTO...

Page 43: ...oc No KRT2 A MAN en Rev 0101 Page 43 Motor glider single Microphone Setup For Electret set L R as required for headset do not leave in AUTO mode For Dynamic use a switch to cut off the dynamic mic If...

Page 44: ...and Installation Manual KRT2 VHF Communication Transceiver Doc No KRT2 A MAN en Rev 0101 Page 44 Motor glider dual Dynamic Microphone Dynamic Microphone Microphone Setup R for headsets leave menu in...

Page 45: ...tallation Manual KRT2 VHF Communication Transceiver Doc No KRT2 A MAN en Rev 0101 Page 45 Motor glider dual Electret Microphone Electret Microphone Microphone Setup leave L 3 9 in case of dynamic 11 R...

Page 46: ...er current grounds with the microphone ground The cleanest GND is the case of the radio Connect the battery GND to the case and pin 1 and the microphone GND to the pin 9 only standard allocation 6 9 6...

Page 47: ...lation recommendation The manufactures instructions have to be observed The metallic contact between airplane surface and antenna ground must be very good Non metallic airplanes must have installed a...

Page 48: ...m with GND pin1 The intercom deactivation will be indicated with e if pin12 is not on GND The intercom requires the connection pin 12 to GND either permanently or through the intercom switches Cockpit...

Page 49: ...g display will appear The start display shows device type and the software number It then changes into the normal operat ing mode Direct Input 6 14 Accessories Suitable accessories such as antennas ca...

Page 50: ...Operation and Installation Manual KRT2 VHF Communication Transceiver Doc No KRT2 A MAN en Rev 0101 Page 50 Figure 12 KRT2 P KRT2 L dimensions Figure 13 KRT2 RC remote control dimensions...

Page 51: ...tallation Manual KRT2 VHF Communication Transceiver Doc No KRT2 A MAN en Rev 0101 Page 51 6 15 2 Installation directions Required space for connectors Figure 14 KRT2 S panel cutout Figure 15 KRT2 P KR...

Page 52: ...d service tasks required on the KRT 2 VHF unit 7 2 Repair Only exchange and flat repair of the equipment is permitted In case of equipment failure the unit must be sent to the manufacturer Refer to se...

Page 53: ...annel Spacing kHz Displayed channel 8 33 25 kHz Mode Displayed Channel 25 kHz Mode 118 0000 25 118 000 118 000 118 0000 8 33 118 005 118 0083 8 33 118 010 118 0166 8 33 118 015 118 0250 25 118 025 118...

Page 54: ...cape Height 46mm Width 64 mm Depth 150mm plus rear panel plugs 60mm Weights 57mm Portrait Landscape approx 0 36 kg approx 0 34 kg Mounting Panel mounting cut out 57 mm or figure KRT2 L P panel cut out...

Page 55: ...e 2 minutes on 4 minutes off automatic turn off after 2 minutes con tinuous transmitter operation Table 13 Technical Data Transmitter RECEIVER Sensitivity 105 dBm 6 dB S N N m 30 1 kHz Bandwidth 25 KH...

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