KRT2 Comm Radio Installation & User Manual 8300-084 ATS, Inc. 1500 S. Old Missouri Rd Springdale, AR 72764 Postal Service Address: PO Box 189 Springdale, AR 72765 www.atsinc.
Installation & User Manual For KRT2 Comm Radio Document Revision ................................................................................................................................................. 4 List of Service-‐Bulletins (SB)............................................................................................................................... 4 1. General ......................................................................
4.3.3 External Audio Input........................................................................................................................26 4.4 Final Audio Setup.......................................................................................................................................27 4.4.1 For Powered Aircraft .......................................................................................................................27 4.4.
Document Revision Revision IR Date 10/31/2012 Description Initial Release List of Service-Bulletins (SB) 4 Page #
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 KRT2 Comm Radio. 1.1 Symbols WARNING Non-‐compliance may cause personal injury due to radiation or fire.
1.
1.3 KRT2 Transceiver properties • • • • • • • • • • • VHF airband transceiver Power output 6 W (nominal) 4 W (minimum) Frequency range 118.000 to 136.975 MHz Channel spacing 8.
2. Controls 2.1 Control Elements Overview Item Name ON / OFF Function Self-‐Locking Power Switch DUAL WATCH 1. Scanning between the Active and Standby frequencies 2. Positioning cursor to the left when programming the station designator AUDIO SELECT 1.
Item Name Function FAVORITES 1. Frequency and designator selection from the favorites list 2. Programming the favorites (frequency and designator) EXCHANGE Exchange of the Active and Standby frequencies FREQUENCY 1. Selection of the frequency range -‐ MHz, 100kHz, 10kHz 2.
Indication Meaning Remarks SQ Squelch VOX Voice operated intercom DIM Display brightness CON Display contrast INT Intercom volume EXT Volume of external devices TX** PTT button selection Left / Right / Both SIDE Side tone set volume played back through headset during transmitter operation BREMEN
Indication Meaning Remarks BAT Supply voltage is low < 10.5 V Battery low or Battery / Generator faulty Er_ANT Antenna error Bad antenna match a v e Status of certain Audio menu functions a = AUX.
3. Operation 3.1 General There is a normal operating mode in which the encoder knob is always 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. 3.
3.3.1 Direct Frequency Selection The Standby frequency is set with the encoder knob in three (3) different ranges. The selected range is highlighted and can be changed with the FREQ button. Frequency ranges are: 1xx.nnn 1nn.xnn 1nn.
3.3.3 Storing and Editing Favorites Any displayed standby frequency can be given a designator and both can be stored together as favorites in the favorite list. Both, the frequency and designator of a favorite can be edited.
SORT? is available for 20 seconds and must be acknowledged by the EXCHANGE button. When sorting was acknowledged with the EXHCNAGE button, all 99 favorites will be 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.
VOL (default) SQ VOX TXm** INT EXT DIM CON SIT MIC 3.4.1 VOL - Volume Turning the encoder knob changes the receiver volume. VOL nn 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. 3.
VOX nn Range: 01 – 10 The intercom will not function unless pin 12 is switched to ground. This enables the intercom feature. The switch should be installed on the instrument panel near the KRT2. 3.4.4 TXm – PTT Switch Selection Pressing the AUD button three times enables the PTT switch setup mode.
3.4.8 CON – Display Contrast Pressing the AUD button seven times enables the display contrast setup mode. CONnn Range: 01 – 10 3.4.9 SIT – Side tone Pressing the AUD button eight times enables the side tone setup mode. SITnn Range: 01 – 10 3.4.
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 and speak at a normal voice level to fine-tune the MIC-level. Whenever a new MIC-level was selected, the dynamic bar indicator should then be at about 50%. When the microphone setup menu is left, the new value is stored. The range of the MIC-level for standard microphones is 01 to 09.
AGC: ..... Ext: ..... HF receiver Automatic Gain Control External audio input voltage Mic: dyn or Mic: std Indicates, which microphone type was selected either by the user or recognized in the AUTO mode. 3.
The pointer next to the DUAL display indicates on which frequency there is reception. Active frequency reception Standby frequency reception Standby and Active frequencies can be exchanged when in the DUAL mode. The transmitter operates on the Active frequency only.
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.
3.8 Resetting to Factory Settings Returning to the factory settings can only be initiated during power-up. 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 favorite list memory. 3.
3.9.1 ERASE – Erasing the Favorites When in the Setup menu select the “ERASE“ submenu with the EXCHANGE button. MEMORY EXCHANGE FREQ Erasing the favorites (frequency and designator) starts after the EXCHANGE button is pressed again.
4. Installation 4.1 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. 4.
4.3.1 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). For standard microphones a supply voltage of 8V at 330Ω is provided.
Add note here about EXT Audio impedance or something like that…basically let people know that straight audio out isn’t enough and there needs to be an amplifier. 4.4 Final Audio Setup This is an overview for a correct audio set up depending on the usage. 4.4.
4.5.
4.5.
4.5.4 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.
• 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 vertically be installed as far as possible away from parts like propeller, landing-‐gear, rudder etc.
4.8 Post Installation Check A complete check of all airplane systems is required to certify that the new wiring is not causing any malfunction. The standing wave ratio must be less than 3:1. A test flight is recommended to verify proper transceiver operation.
4.9 Drawings 4.9.
5. Annex 5.1 Frequency / Channel Schedule The following table contains the operating and displayed frequencies between 118.000 and... 118.100 MHz. T he t able can be continued up to 136.975 MHz following the same principle. Operating Cannel Displayed Displayed frequency Spacing channel Channel (MHz) (kHz) 8.33/25 kHz Mode 25 kHz Mode 118.0000 25 118.000 118.0000 8.
5.2 Technical Data GENERAL Compliance Standards FCC ID: OT4KRT2 Meets ETSO-2C169a, ED-23B Class 4 Meets ED-23B Class C Meets TSO-C169a,Class 6 Meets TSO-C169a, Class H1 & H2 Standards EUROCAE ED-23B RTCA DO-160E RTCA DO-178B Software Level D Dimensions Height: 2.56 inch Width: 2.56 inch Depth: 5.67 inch plus rear panel plugs 2.36 inch 0.79 lb (360 grams) panel mounting, cut-out Ø 2.
ATS, Inc. 1500 S. Old Missouri Rd Springdale, AR 72764 Postal Service Address: PO Box 189 Springdale, AR 72765 www.atsinc.
