FSG 70 FSG 71M
Contents
1. seme 3 8 3 4 Connection of the microphones ener eren nnne terne 3 12 3 4 3 Intercommunication ll enne nennen nenne iners nnne dns 3 12 3 4 44 Speaker Phone connection eene eene nennen nnn nnn 3 12 34 5 AF External Input o Led doeet Bee eel ad oe Evan dust 3 12 3 4 6 Illumination of the Frequency Display 3 13 3 4 7 Connection to 28Vdc aircraft bus 3 13 3 5 Post Installation Check iiie ccc Edi ENNER dd ERR ree D ox dep EE deg RAE 3 14 3 5 1 Testing on the Ground with the Engine Off emen 3 14 3 5 2 Testing on the Ground with Engine Runmimg enne 3 14 Section IV ODE RATION m 4 1 4 1 Control Funcions 0 0 cecec cece E E E E E E 4 1 4 2 Operating ie de 4 2 4 3 Programming the Channel Frequency Memory FSG 71M on 4 3 4 4 Recall of Stored Freouences nanena 4 3 4 5 Battery EE 4 3 ALS Emergency Operation s asce a e ee std ata ei den did 4 4 4 7 Squelch Function SQ ue cree i ertet ert edu p Prueba B e made LR d uu d 4 4 4 8 Intercommu nicatiom IG eene eei EEN 4 4 4 9 Audio External EE 4 4 Appendix A CertifiCale 5o e dete ut Ee titia Deu EEN A 1 Reprint July 1998 Page iii FSG 70 FSG 71M OPERATION MANUAL W Dittel GmbH Figure 3 1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 9 3 10 4 1 List of illustrations Page Location of Audio Sidetone Control and Microphone Gain Control 3 2 Test Set up Envelope Detector eene emere e2. ON Position the IC switch disconnects the speaker and activates the microphone input by connecting pin 5 of receptacle to ground Switching ON the IC switch enables intercom operation and simultaneous listening to received signals radio NAV etc Keying the PTT button causes normal TX operation without having to turn off the IC switch Speaker Phone connection Up to two speakers 4 Ohms each can be connected to the AF output of the unit and or up to three headphones ca 300 Ohms each can be connected to the phone output of the unit If no speaker is connected terminating is not necessary DANGER N e The compass is influenced by the magnetic field of the speaker A minimum distance of 1 3 m between our aircraft speaker Article no F10061 and the compass should be kept AF External Input The AF Ext input pin 4 of receptacle is provided to connect the headphone outputs of other communications equipment This possibility of interconnecting two or more units will be used primarily in those aircraft in which only a COM Transceiver and a NAV receiver are installed The headphone output of the NAV unit can then be connected directly to the AF Ext input of the FSG 70 FSG 71M and then be heard simultaneously from one common headphone or speaker only during receive mode possible To connect more than one external unit isolating resistors 470 Ohms are necessary see Fig 3 9 If AF ext audio operation is desired the jumper
3. Rotate channel selector knob to desired channel number The stored frequency will appear on the display and the transceiver is tuned Only for Users of FSG 71M Transceivers If the built in battery of the electronic memory is defective the memory content is lost when the unit is switched OFF For safety reasons the memory battery should be changed every five to six years by authorized personnel recommended date of change see separate tag on unit Battery Check The FSG 70 System transceivers indicate low battery voltage by causing the frequency display to blink if the power supplied drops below 11 volts When operating from battery Depending on battery capacity and the duration of transmit operation the following operating times may remain after blinking starts until the battery is fully exhausted Reference approx 20 C 6 5 Ah battery feeding only the transceiver Operating conditions 1096 transmit 2096 receive 7096 stand by ACTION CONSEQUENCE a Blinks while transmitting Approx 5 hrs operation left b Blinks also while receiving Approx 45 min operation left Recommendation Transmit only when absolutely necessary c Short time blinking in stand Cease transmitting by mode switch at SQ Approx 45 min of receive only operation left position no reception d Continuous blinking in Turn off unit Recharge battery as soon as possible Stand by mode Refer to Section 4 7 Emergency Operation IMPORTANT
4. distance Adjust microphone gain potentiometer cw until no more increase of the amplitude on the CRT is visible control threshold Check both microphones they should have the same adjustment d Secure microphone gain potentiometer by any staking lacquer IMPORTANT o a The speech volume of course is higher in a noisy powered glider or in an Ultralight than in a silent fiberglass glider b For standard carbon microphones no matching is required but they should be checked in the way mentioned 3 2 2 Audio Sidetone With the FSG 70 FSG 71M transceiver a part of the modulation signal is fed to the headphone output as long as the transmitter is operated The sidetone control see Fig 3 1 should be set so that the tone is audible but not too loud Please consider the ambient noise in the aircraft when adjusting The volume in Intercom mode is about the volume of the audio sidetone and can not be adjusted separately AUDIO SIDETONE CONTROL FSG 71M only MICROPHONE GAIN CONTROL Fig 3 1 Location of Audio Sidetone Control and Microphone Gain Control Page 3 2 Reprint July 1998 FSG 70 FSG 71M W Dittel GmbH OPERATION MANUAL Dummy VHF Modulation Analyser FOR TRANSMITTER CHECK xt FOR RECEIVER CHECK Watim lar Bird Model 43 RACAL 9009 Oscilloscope OS 250 A Distortion Analyser HP 331A Envelope MENC Teg Detector VHF zz Signal Generator AF Millivolt UG 88C U Meter FSG 70 F
5. e The transitions for a b c and d have fluent character the battery recovers somewhat after load is reduced Reprint July 1998 Page 4 3 FSG 70 FSG 71M OPERATION MANUAL W Dittel GmbH 4 6 4 7 4 8 4 9 When operating from aircraft s power system The aircraft s power system must soon be investigated Blinking frequency display When operating from 28 V aircraft power system Blinking frequency display Check voltage regulator and aircraft s power system Emergency Operation In an emergency case the unit can also be operated with supply voltages down to 9 7 Volts The audio output and transmitting output are of course reduced Batteries must always be recharged immediately after emergency operation because extensive discharging incurs the risk of deterioration and permanent damage this risk is increased if a discharged battery is also stored in that state Squelch Function SQ With the left toggle switch in the SQ position normal operation the automatic squelch circuit of the unit is active This disables the audio amplifier when the receiver has no signal or one which is too weak Signals stronger than the threshold approx 1uV enable the audio amplifier and are therefore reproduced in the headphones loudspeaker annoying VHF noise is thereby suppressed Also considerable power is saved If however very weak signals are to be received e g a glider landing far from base then the SQ toggle
6. regulator must be used h 15 pole Plug type DA 15S incl shell if no complete cable assembly is ordered Page 2 6 Reprint July 1998 FSG 70 FSG 71M W Dittel GmbH OPERATION MANUAL 2 7 Summary of the FSG 70 System In Table 2 1 the various types of VHF COM transceiver of the FSG 70 System are listed The Part No is printed on the type plate of the respective transceiver Frequency iud Range Lighting 027 111 F10002 FSG 70 118 136 975 14Vdc 027 112 F10099 FSG 70 118 136 975 28Vdc Ceased 027 131 FSG 70 118 135 975 14Vdc 027 132 FSG 70 118 135 975 28Vdc 028 121 FSG 70 118 157 975 14Vdc 028 122 FSG 70 118 157 975 28Vdc 027 211 F10003 FSG 71M 118 136 975 14Vdc 027 212 F10100 FSG 71M 118 136 975 28Vdc 027 231 FSG 71M 118 135 975 14Vdc ze ven Tata 028 221 F10102 FSG 71M 118 157 975 14Vdc 028 222 FSG 71M 118 157 975 28Vdc Table 2 1 Extended frequency range for Government Authorities only Reprint July 1998 Page 2 7 FSG 70 FSG 71M OPERATION MANUAL THIS PAGE INTENTIONALLY LEFT BLANK Page 2 8 W Dittel GmbH Reprint July 1998 W Dittel GmbH FSG 70 FSG 71M OPERATION MANUAL Section III Installation 3 1 3 2 IMPORTANT o e Switch always OFF the radio before connecting or disconnecting the receptacle plug This is a simple precaution which helps to protect the solid state circuitry and extends the operating life of your
7. 13 if required Headphone 14 Dyn Mike Aircraft Speaker 15 AWG 18 20 AWG 18 20 Headphone 0 6 0 75 mm 0 6 0 75 mm if required blue red Headset or Microphone with On board wiring using Battery PTT Key prefabricated harness F10028 Power Supply 12 V 6 5 Ah F10023 NOTES DO NOT wire other pins than noted All wires 22 AWG 0 3 0 4 mm unless otherwise noted Built in Automatic Circuit Breaker when using Battery Power Supply F10023 Length of pre fabricated wire harness F 10028 3 2m 9 5ft eee es and coax antenna cable are not included in wire harness F10028 Fig 3 7 FSG 70 FSG 71M Hook up Diagram without INTERCOM 1 2 Dynamic Microphones Reprint July 1998 Page 3 9 FSG 70 FSG 71M OPERATION MANUAL W Dittel GmbH COM Antenna DA 15S Soldering Side e Stick PTT j Key s as required Aircraft Speaker 30 W A Q AN F10061 Antenna Coax RG 58 C U FSG 70 FSG 71M i COM Antenna Sum d To connect a second hand Dyn Microphone 1 held microphone Microphone GND 2 with PTT key or Standard Microphone 3 a2 headset AF Extenal 4 Intercom E 5 1 e TT Intercom RX Annunciator d4 6 ON amp OFF PTT Key m 7 Display Lighting 12Vdc 8 Panel Light Battery 12Vdc 9 Switch Battery 12Vdc 10 Bat
8. switch is placed in the down position This permits noise during pauses but weak signals of marginal strength are no longer suppressed and the full reception range is available Intercommunication IC 1 Turn on IC mode with IC switch refer to Fig 3 7 3 8 2 Intercommunication is performed via microphone and headphone 3 Pressing the push to talk button activates the transmitter as usual turning off the IC mode is not required 4 After releasing the push to talk button intercom operation is re enabled Audio External Via the AF Ext input a second or third radio or NAV receiver E Variometer can be connected to the transceiver When wired for this purpose the volume of the external receivers is are to be set so the signals can be understood and distinguished one from another The VOL control of the FSG 70 FSG 71M affects not the volume of the external units and vice versa Page 4 4 Reprint July 1998 FSG 70 FSG 71M OPERATION MANUAL Certificate Appendix A W Dittel GmbH 20 A ZT BunDbiosisAsDunuueds zuonbeij ieuro jn usyoorzdstesyooam ia2esqariiod zm SZ i pue3sqereuex E O a qavepues M9 bDunisre sDuebsny 4H ZHW GL6 9ET 000 8TT qorezeqzuenbei 1g1eDopeT uojneqsbure jru aepo uiojxo Jepo iert DunDaosdeasbunuuedg Tlejsebohberl wt nequtg 4de euorado Sd 2d WIL 984 zepo Sd Od OL 583 1e2efxunjguoeids xn SN GIZSHOSSGNSISAS Z T 3798 T 80829 1N SDueb2oA Leet ep LT WOA
9. the standard warranty 12 month of the manufacturer thereof This warranty does not cover equipment which has been 1 damaged or not maintained as reasonable and necessary 2 modified in any way 3 improperly installed 4 repaired by someone other than the warrantor or an authorized warranty repair station or 5 used in a manner or purpose for which the equipment was not intended This warranty shall not extend to incidental or consequential damages arising from operation of the equipment or from any claimed breach of this warranty Copyright 1990 Walter Dittel GmbH reprint July 1998 All rights reserved This document contains proprietary information and such information may not be disclosed to others for any purpose nor used for manufacturing purposes without prior written permission of the manufacturer Walter Dittel GmbH Luftfahrtgeraetebau D 86899 Landsberg am Lech Germany In this document no mention is made of patents trademark rights or other proprietary rights which may attach to certain words or entries The absence of such mention however in no way implies that the words or entries in question are exempt from such rights Service Page The information in this Operator s Manual does not profess to include all the details of design production or variation of the equipment or to cover all the possible contingencies which may arise during operation or maintenance Should any unusual problem arise or furth
10. 60 10dB 1 to 10mV into 2000 adjustable 100 to 1000mV into 2000 14Vdc 28Vdc by order or external resistor 680 Ohms 0 5 Watt Min 1 0V into 470 Ohms for rated performance Through microphone input activated by grounding Logic HIGH 10Vdc in Receive and NO SIGNAL mode Otherwise logic LOW 0Vadc Page 2 5 FSG 70 FSG 71M OPERATION MANUAL W Dittel GmbH 2 5 2 6 Units and Accessories supplied Article No FSG 70 BEE EEN F10002 incl Installation Manual and 4 fixing screws A CAT EE F10003 incl Installation Manual and 4 fixing screws Optional Accessories Installation Manual FSG 70 FSG 71M 027 HB O0E Maintenance Overhaul Manual FSG 70 FSG 71M 027 HB 10 Prefabricated cable assemblies on stock For additional accessories please request our equipment recommendations and price lists for the FSG 70 System Accessories required but not supplied a VHF aviation communications antenna cable and BNC Plug b Headphone s approx 300 Ohms and or loudspeaker s 2 to 16 Ohms c Dynamic microphone s 200 Ohms dynamic microphone s with pre amp or low impedance carbon microphone s with without push to talk button two separate microphone inputs d Alternate to b and c headset with above specifications e Battery power pack 12Vdc 6 5Ah if no on board supply system f Push to talk button for installation on control stick 9 To operate the FSG 70 FSG 71M on a 28 V on board supply a suitable voltage
11. 8 1 j EE PTT Key 7 2 i C 7 RX Annunciator 6 H Headph b Headphone Plug Pilot eadphorie 4 PJ 055 P N E08941 Standard Mike Intercom S Jack with PTT Ke AF External sf ti ts Am Carbon Standard Mic rom 3 Le Microphone GND 2 A le 4 Dynamic Mic 1 2 2 CT TERE e 13 75 V or HI l Microphone Plig Ner s d ar O Warom Microphone pj 566 P N E08942 DA 15S Dimmer or Jack Panel Light JJ 033 i i i Copilot Switch B p is PN Bee i Headphone AWG 18 AWG 18 P N E08639 p 1 mm blue 1 mm red 1 CT D E 2 i L e d 2 OOK Headphone Plug Copilot Il disk d PJ 055 P N 08941 Standard Mike oa d with PTT Key e Aircraft C3 12 i C NT Supply Cl 13 75 Vdc Microphone Microphone Plug Jack PJ 068 P N E08942 JJ 033 Built in stick P N E08640 PTT Key s NOTES DO NOT wire other pins than noted Unless otherwise noted all wires 22 AWG 0 3 0 4 mm Unless otherwise noted all Power Grounds are airframe grounds INTERCOM operation requires a microphone which provides audio OUT with the PTT key de energized not keyed INTERCOM operation requires a selector switch double pole double throw Terminate audio shields at one end only Power bus circuit breakers are to be mounted in the A C breaker panel or instrument panel such that they will be accessible in flight and safe from physical damage PTT Key s either at hand held microphone s or installed on the yoke L Wir
12. FSG 70 VHF AM COM TRANSCEIVER 118 000 136 975 MHz FSG TIM VHF AM COM TRANSCEIVER 118 000 136 975 MHz Installation amp Operation Manual applies for FSG 70 article no F10002 applies for FSG 71M article no F10003 Before installing and operating the radio read this manual thoroughly please Please observe the Safety Information Keep for further use Document No 027 HB 00E Revision No Reprint 1 AE Date Issue July 1998 Q Avionics Division Ve Walter DITTE Erpftinger Strasse 36 D 86899 Landsberg Germany lt Luftfahrtger tebau Telephone 49 8191 3351 0 Fax 49 8191 3351 49 e mail firma dittel com Internet http Avww dittel com FSG 70 FSG 71M OPERATION MANUAL W Dittel GmbH Warranty Copyright Service Warranty The details and data in this operator s manual correspond to the respective state of technology on the day of printing We reserve our right to change without prior notice due to new technological design or corresponding new production technology WALTER DITTEL GmbH takes no guarantee for these documents with respect to application and interpretation WALTER DITTEL GmbH Warrantor warrants to the purchaser of new radio equipment of the warrantor s manufacture that such equipment shall be free from defects in material and workmanship for a period of 24 month from the date of delivery Equipment and accessory items not manufactured by the Warrantor carry
13. Hz m 30 gt 8kHz at 6dB 2 70GB at 25kHz 2 40dB at 17kHz Automatic defeatable threshold internally adjustable ca 0 5 3uV lt 6dB 5uV to 200mV gt 80dB image 75dB others 5x 10 Watt 1096 lt 6dB 350 to 2 500Hz 2 18dB at 4 000Hz 10 0MHz Headphone 35mW into 5000 adjustable Loudspeaker 8W into 20 4W into AC Reprint July 1998 W Dittel GmbH 2 4 3 2 4 4 Transmitter Electrical Data Frequency range Number of channels FSG 70 Number of channels FSG 71M Transmitter output Type of modulation Operation Depth of modulation Modulation limiting Frequency deviation Harmonic and spurious radiation Harmonics and spurious in the range of 108 to 118 MHz 1015 to 1045 MHz Frequency response Distortion factor m 85 Modulation S N ratio Adjacent channel rejection Microphone input for m 85 a Low level input b High level input Additional features Display lighting External audio input Intercom RX audio annunciator Reprint July 1998 FSG 70 FSG 71M OPERATION MANUAL 118 000 to 136 975MHz 760 760 of which 10 frequencies may be free programmed and permanently stored Min 6 Watt into 50 Ohms at nom voltage Amplitude modulation 6A3 Simplex SCS Max 95 Adjustable control 15 x 10 lt 2 x 10 Watt 2 x 10 Watt 2 x 10 Watt lt 6dB 350 to 2 500Hz 10 35db gt TOdB at 1 250Hz m
14. RTCA Performance Standards observe national regulations Featuring small dimensions low weight and extremely low current consumption these units are suitable in motorized gliders gliders balloons Ultralights homebuilts experimentals and as emergency back up transceiver too Together with the W Dittel GmbH carrying cases the transceivers of the FSG 70 SYSTEM can be used as portable mobile and fixed base ground stations The excellent suitability of the units to be powered by batteries should be emphasized Special modes like Intercom AF External Input storage of VHF frequencies etc are possible without any other additional equipment depending on type of unit The LC frequency display can be illuminated The transceivers comply with the Performance Standards of RTCA and EUROCAE regulations Additionally they comply with the regulations for groundstations Reprint July 1998 Page 2 1 FSG 70 FSG 71M OPERATION MANUAL W Dittel GmbH 2 3 Brief Description The FSG 70 and FSG 71M are miniaturized lightweight panel mounted transceivers designed to operate in the VHF COM frequency range from 118 000 to 136 975 MHz in 25 kHz increments thus providing 760 channels over a standard communication distance of 100 nautical miles at FL 70 The case dimensions fit into a standard 274 cut out of the instrument panel Only four screws M 4 x 16 are used to install the transceiver units Electrical connections to the environment are m
15. Raise the AF input voltage to 1 0V Observe the envelope a continuous over modulation must not occur The depth of modulation must not exceed 95 b Low level input Dynamic microphone With an AF input voltage of approx 1mV the transmitter should be gt 40 modulated Raise the AF input voltage to 10mV Observe the envelope the depth of modulation must not exceed 95 IMPORTANT o e With voice modulation greater depths of modulation occur because of the dynamics typical of speech quick level changes Setting the modulation control to approx 8596 for sine modulation results in a favorable compromise between carrier utilization and over modulation Reprint July 1998 Page 3 1 FSG 70 FSG 71M OPERATION MANUAL W Dittel GmbH 3 2 1 Matching the Microphones The output voltages of dynamic microphones are differing reasonably depending on type number of parallel connected microphones and speech volume To utilize the high quality of our transceivers we recommend matching of the microphone set in use to the microphone input of the transceiver as follows a Connect the microphone set max 2 microphones of the same type via test cable or on board wiring to the transceiver b Turn microphone gain potentiometer see Fig 3 1 fully ccw Set sidetone level control to any position except the full ccw position and check the headphone output level C Switch ON Intercom Talk into one of the microphones with typical loudness and
16. S9 96 OTl AN spunxrnsDunsser nz Inz q eDequy 1ereuxaeuixe qo ere SST 00 81 28 9 1 90 xe4 0 86 S La 90 rei uexoquqrees BLL GOA ZH pE egenisye uonexunuauoxere pun 1504 JM uresepung eDequy T Uuoeg uejeais L66T 60 LT U P uexoniqieeg BrirpBun 3TUzeTU PATA G8 TT ZZ UnjepsSunitteissny yyw espunyansSunssetng ata REI Funi eqeBsny ETOZ UL LT ZLA STUTTIGOTY Asp Uo33I2UO ICA UeuosTUgo91 stp ATINFA8 Jy fqos unssernz seq abelueyunjyoeids sie syunjintg usyotTbeameq sep uerreisxunguepog ur eDequexung qzezyalao qe qstijequn Hunistazjeq bunsseinzurewebDTTV 31tsDbunssetnz yoaT braqspuel 66898 0 or edeijg rzebutajdiag Hquo Cat ie3 eM xeqeuurisBunsserng DAWTL OSA SdWIL OSA WIL OSH Od0L O84 Sd0L OSA OL 984 Dunuuotezeqiwetqo S8 P6 O1 zeuunusDunsse nz FGNNYYNSONNSSV1NZ NOLLVMINOININOS3T3 L ANN LSOd YN LAVSSON S Page A 1 Reprint July 1998
17. SG 71M HP 331A Antenna x SP Se Dynamic Microphone s or Dyn mike open Standard Carbon Microphone s C WP ech KA Std mike closed C 2K2 F Audio 180R 22R SZ Dynmike AF Generator Generator E 5 CH Equivalent resistor Standard carbon microphone 3 Dynamic microphone 1 Microphone GND 2 Audio External 4 Speaker t 15 Ground d 12 Headset 14 4 Ohm 5 Watt Spare 13 PTT Key 7 PTT Ke mum Intercom scilloscope Intercom L 5 jJ m v Lm OS 250A Illumination 8 ishing v 13 8 V DC L 9 13 8 V DC 10 Distortion Analyser Ground 11 Millivoltmeter HP 331A RX Annunciator _ L 6 Equivalent Measuring Power Supply Equipment may be used 13 8Vdc 2 5A RF RF Input Output soldered 5K6 5K6 1NA4148 39K soldered Brass sheet housing all resistors 74 watt Cover removed AF Output Fig 3 2 Test Set up Envelope Detector Reprint July 1998 Page 3 3 FSG 70 FSG 71M OPERATION MANUAL W Dittel GmbH 3 3 Mechanical Installation 3 3 1 Installation of the Transceiver The units of the FSG 70 System are rigid mounted behind the aircraft s panel They fit into a standard 2 cut out If there is no suitable cut out one can be made following the drawing Fig 3 4 or Fig 3 5 To install the transceiver in the instrument panel select a location which is as far as poss
18. TCH SQ SWITCH ON OFF SWITCH FREQUENCY DISPLAY FREQUENCY VOLUME DISPLAY CHANNEL SWITCH INDICATO kHz SELECTOR MHz SELECTOR kHz SELECTOR MHz SELECTOR SWITCH SWITCH SWITCH SWITCH Fig 4 1 Controls and readouts OFF ON Toggle switch with two Lever down Power OFF pee c mm Lever up ON unit supplied with power To increase the RX volume rotate the knob clockwise SQ Switch Toggle switch with two Lever down The squelch circuit is off positions Basic RX noise is audible Lever up SQ Common position the squelch circuit is activated Only reception of signals above SQ threshold Frequency display 5 digit liquid crystal display Shows the operation frequency in digital internal lighted form set from 118 00 to 136 97 MHz Last digit 5 or 0 does not appear Blinks if power supply drops below 11Vdc kHz Selector inner rotary knob with 40 Sets frequency in 25 kHz increments detents 000 975 MHz Selector Outer rotary knob with 19 Sets frequency in 1 MHz increments detents stops at 118 and 118 136 136 MHz TX Indicator Yellow LED Lights during depressing the push to talk switch Reprint July 1998 Page 4 1 FSG 70 FSG 71M OPERATION MANUAL W Dittel GmbH Additional at FSG 71M Controls n CHAN Rotary knob with 11 detents Knob fully clockwise Channel selector Frequency free selectable by MHz and switch kHz knobs Knob on position 1 through 10 Recall or storage of channel frequencies Refer
19. ade through a 15 pole SUB D connector and a BNC female connector at the rear panel of the units The operational frequency is displayed by means of a Liquid Crystal Display with five digits following the ICAO scheme The least significant digit is omitted e g 127 875 is displayed as 127 87 MHz The transceivers consist of five main sections Digital frequency synthesizer receiver transmitter 6 watts carrier 24 watts PEP audio circuits and LCD frequency display circuitry Model FSG 71M includes an additional section A non volatile electronic ten channel memory This memory and its command controls make the only difference between FSG 70 and FSG 71M The operational frequency of the FSG 71M unit is indicated by the LCD and may be selected in two modes on the front panel a Direct mode The channel control knob on the right front side must be set to full ccw position By using the MHz kHz coaxial double knob on the front panel all 760 channels may be selected as usual b Storage mode The channel control knob is set to select the desired channel for any Read or Store action Up to 10 out of 760 channels may be programmed and permanently stored for up to five to six years in the electronic memory Storage channels may also be reprogrammed if necessary even in flight The FSG 70 has no channel control Frequency selection can be performed only in direct mode using the coaxial double knob Further features incorporate an aut
20. ane strips ZT 008 and for aircraft with vertical tail rudder of non conductive material Notice carbon fiber is conductive and screens the antenna our folded top antenna to be installed in vertical rudder during rudder manufacturing Installation drawing available on request The location for the antenna must be carefully selected and the installation instructions must be followed exactly if optimal results are to be expected e The antenna should be mounted vertically on or under the fuselage such that it is well removed from any projections that may shield RX and TX such as propeller s landing gear or rudders e The distance to other antennas e g COM NAV etc should be at least 1 5 meter If two units of FSG 50 FSG 60 60 M 70 71M are used a distance of one meter is sufficient e The area of installation should be flat as far as possible around the antenna e The metal to metal contact between the aircraft s surface and the antenna must be very good For aircraft with non metallic surfaces metal foil 80 x 80 cm min is to be glued to the interior of the fuselage or four crossed strips of sheet metal are to be installed see above aviation communications antenna with aluminum ground plane The ground plane must be bolted directly at the foot of the antenna conductive connection e With thin fuselage skin the mounting hole must be suitably reinforced All breaches of the exterior skin are to be carefully closed with sea
21. at P 303 is to be changed as shown in Fig 3 10 This inhibits the automatic power saving circuit To drive the FSG AF amplifier to its rated output an audio input of at least 1 Veg is required input impedance approx 10 kOhm The connections between COM unit and external units must be shielded Page 3 12 Reprint July 1998 AA FSG 70 FSG 71M W Dittel GmbH OPERATION MANUAL Jumper J303 is accessible after opening the upper cover At the FSG 71M the Memory P C Board has to be removed first Changing the jumper may only be performed by authorized personnel JUMPER J303 ACROSS PIN 1 2 FACTORY SETTING JUMPER J303 ACROSS PIN 2 3 AF EXTERNAL Fig 3 10 Activating the AF EXTERNAL Input 3 4 6 3 4 7 Illumination of the Frequency Display All transceivers of the FSG 70 System are equipped with an illumination of the frequency display The lamp voltage is supplied via the aircraft s dimmer or directly from the aircraft supply The lamp voltage is stamped on the type plate If a 14Vdc lighting should be connected to a 28Vdc aircraft supply a 680 Ohm resistor 0 5 W in series is necessary IMPORTANT e The illumination is not turned ON or OFF by the unit s ON OFF switch To save energy we recommend a separate lighting switch if the unit is battery powered Connection to 28Vdc aircraft bus To connect the transceiver to a 28Vdc bus a suitable voltage regulator must be used Wiring refer to Installation Manual of th
22. avionics equipment General This section contains instructions and suggestions for installing the FSG 70 FSG 71M in an aircraft Pre installation Check Carefully remove the transceiver packing and save in case a claim has to be placed with the shipper Check for conformity between delivery note and goods delivered Check the unit carefully for external damage Before installing a check of the main functions is recommended 1 Connect the unit to a test bench using the test cable set shown in Fig 3 2 Ensure 13 8Vdc operating voltage and switch on the unit right toggle switch ON SQ switch OFF left toggle switch down Turn volume control about half way open clockwise Slight receiver noise should be audible on all channels in the range from 118 to 136 975 MHz Receiver sensitivity should be equal the technical data on all channels check by sample test Push left toggle switch upward SQ vary VHF generator output voltage and observe the squelch threshold it must be between 0 5 uV and 3 uV depending on setting Connect RF test set up with RF load resistor 50 Ohms at the antenna output Transmit and measure the output power 2 6 W Connect 1 000 Hz audio generator through a voltage divider or directly low level high level microphone to the microphone input a High level input Standard Carbon mike With an AF input voltage of approx 100 man the transmitter should be gt 40 modulated
23. ble Voltage Converter 24Vdc 12Vqc of at least 4 Amps must be used The FSG 70 71M may be used exclusively for communication on the airband frequencies Unauthorized modifications and changes of the system are forbidden When replacing defective parts use only original spare parts or standard parts recommended by the manufacturer In aircraft or vehicles a suitable noise canceling microphone or headset for aircraft radios shall be used A backup microphone should always be carried during any flight Even new microphones can fail Volume is very important Increasing speaking levels while the lips are facing the microphone but not straining or pushing to yelling levels will increase clarity Prior to any flight verify proper FSG 70 71M functions by means of a short communications test It has to be taken into account that with a faulty antenna or cable this COM test may absolutely turn out positive at the airfield or in short distance to the ground station But at a distance of 2 to 6 miles faulty antenna and or cables will cause communication breakdown Push to Talk keys may stick occasionally Therefore observe while transmitting the yellow TX LED at the FSG 70 71M This TX LED must go off when releasing the PTT key Replace blown fuse only against correct type with specified nominal value Investigate the cause Reprint July 1998 Page 1 1 FSG 70 FSG 71M OPERATION MANUAL W Dittel GmbH 1 1 Used Symbols In this manual the foll
24. e Voltage Regulator Reprint July 1998 Page 3 13 FSG 70 FSG 71M OPERATION MANUAL W Dittel GmbH 3 5 3 5 1 3 5 2 Post Installation Check Testing on the Ground with the Engine Off After installing the unit check all aircraft control movements to be sure no electrical cables interfere with their operation Then measure the antenna matching between the RF jack of the unit and the antenna cable A VHF standing wave meter or an in line type directional wattmeter is required for this measurement The standing wave ratio should be less than 3 1 throughout the entire frequency range of the unit reflected power lt 25 of the input power If this value is exceeded a strong mismatch exists which for example may be caused by an incorrect or insufficient ground plane poor contacts or incorrect radiator length For higher range we recommend a standing wave ratio of max 2 1 reflected power lt 11 of the input power After antenna measurement a signal check with the ground station is performed IMPORTANT e With belly mounted COM antenna this measurement must be performed during flight in order to prevent incorrect measurements Testing on the Ground with Engine Running With the engine running it must be ensured that the aircraft s electrical system voltage lies within the tolerances permitted at 14 or 28 V as applicable this measurement is to be made with the engine operating at cruising RPM When carrying out a subs
25. equent signal check the ground station must be at a distance of approx one to five km At engine cruising RPM aircraft cabin noise should be avoided to be picked up by holding the microphone near the lips in order to provide a much more desired signal than cabin noise If possible verify the communications capability on both the high and low end of the VHF COM band If noise occurs only with the engine running and its frequency varies with the engine speed it may be caused by an inadequately suppressed ignition system or alternator voltage regulator equipment or by a poorly stabilized on board supply voltage According RTCA 160 A the limits for ripple voltages in 14Vdc supplies are 0 79 V at 0 2 1 kHz 1 98 V at 1 15 kHz For 28Vdc supplies double limits It is easier to distinguish between RF and AF interference carried by the lines by removing the antenna plug at the transceiver RF interference which usually comes from the ignition or generating system disappears Supply ripple can be found with an oscilloscope Its source is usually the generator equipment in conjunction with a poor battery or poor wiring bad contacts defective switches inadequate wire cross sections ground loops Bad contacts in the antenna system are also responsible for heavily distorted communication Page 3 14 Reprint July 1998 FSG 70 FSG 71M W Dittel GmbH OPERATION MANUAL Section IV Operation 4 1 Control Functions STORE BUTTON SQ SWITCH ON OFF SWI
26. er information be desired please contact the Walter Dittel GmbH Service Department Erpftinger Strasse 36 D 86899 Landsberg am Lech Germany Since May 1994 the company ANTONLANG FLUGFUNK SERVICE qe ARD g Pappelweg 26 AlE gr N D RAD yos D 86972 Schwabniederhofen ne Germany ro Tel 49 8861 1739 Fax 49 8861 1590 took over all repair work of airband radios of Walter Dittel GmbH Luftfahrtgeraetebau Erpftinger Stasse 36 D 86899 Landsberg am Lech Germany The offered services of company LANG include all repairs overhaul maintenance and inspection according to the regulations of the German Federal Aviation Authority Luftfahrtbundesamt LBA The company LANG is an authorized repair station certified by the LBA under registration number II A272 IMPORTANT Also all warranty repairs are done solely by company LANG Subject to technical changes Printed in Germany 03 05 01 Reprint July 1998 FSG 70 FSG 71M W Dittel GmbH OPERATION MANUAL Table of contents Paragraph Page Warranty Copyright SerViG8 cud dede e Ek ede eee x Pep e Dundee e de tee c antes ii Table OF Contents oco se rr oen I ER RR gees EE EA eara SKEP Paari EVER darina iii Bel te EE iv List or valld Dages EE iv Section l Safety Information eene cece a 1 1 Ts Used SymbOls o eid oe one treo ae iaa nena S scant epus 1 2 Section Il General Information 1 eeeeee eese ense eene nennen nnn nnn nnn nnn nn 2 1 221 Lag ee en
27. f sparks All users of our radios should be aware of the following warning Do not operate this radio in an explosive atmosphere petroleum fuels solvents dust etc During normal use the radio will subject you to radio frequency energy substantially below the level where any kind of harm is reported TO ENSURE PERSONAL SAFETY please observe the following simple rules DO NOT transmit when the antenna is very close to or touching exposed parts of the body especially the face and eyes DO NOT transmit on a busy channel DO NOT press the transmit PTT key when not actually desiring to transmit DO NOT transmit in closed aircraft or vehicles with the antenna inside the cabin This may cause malfunction of the avionics or trigger the airbag Always operate the radio FSG 70 71M with a suitable outside external antenna Assure appropriate lightning protection where elevated outdoor antennas are used DO NOT operate the radio whilst driving It should also be noticed that the use of a hand held microphone while driving could constitute an offence under the Road Traffic Regulations in certain countries DO NOT allow children to play with any radio equipment containing a transmitter Always switch OFF the radio first when installing the unit into vehicles aircraft or carrier cases or when removing from it Always switch OFF the radio first when starting an engine or vehicle When operating the FSG 70 71M on a 24 28Vdc source a suita
28. ible from heat sources but which can be seen easily and reached by the pilot and co pilot Ensure that there is adequate space for installation of cables and connectors The unit is fixed to the panel by four pan head screws M 4 x 16 supplied The length of the screws is sufficient for panel thickness between 2 and 8 mm 3 3 2 Influence on Compass Compass Deviation NM 2 0 1 5 1 0 0 5 Distance 0 5 10 15 20 25 30 35 cm Fig 3 3 Deviation of Compass by FSG 70 FSG 71M depending on the Distance between Center of compass and contour of Transceiver Page 3 4 Reprint July 1998 AA FSG 70 FSG 71M W Dittel GmbH OPERATION MANUAL All dimensions in Millimeter Weight 0 74 kg Fig 3 4 FSG70 Dimensions Installation Drawing Reprint July 1998 Page 3 5 FSG 70 FSG 71M OPERATION MANUAL W Dittel GmbH ill All Dimensions in Millimeter Weight 0 8 kg Fig 3 5 FSG71M Dimensions Installation Drawing Page 3 6 Reprint July 1998 FSG 70 FSG 71M W Dittel GmbH OPERATION MANUAL 3 3 3 Antenna Installation A conventional 50 Ohm vertically polarized COM antenna is required with the FSG 70 FSG 71M transceivers The antenna must be able to radiate equally distributed RF energy without interference For installation in an aircraft with a metal fuselage we recommend our AV 529 antenna part No ZT 037 for wooden and plastic aircraft our swiveling aviation communications antenna with four aluminum ground pl
29. ing without Intercom connect A C speaker direct to pins 11 and 15 zt If more than one AF source isolation resistors 470 Ohm shall be installed Fuse 2 5 Amp semi time lag or circuit breaker 2 5 Amp Fig 3 9 FSG 70 FSG 71M Hook up Diagram 1 2 Standard Carbon Microphone s and INTERCOM Reprint July 1998 Page 3 n FSG 70 FSG 71M OPERATION MANUAL W Dittel GmbH 3 4 2 3 4 3 3 4 4 3 4 5 Connection of the microphones Standard carbon microphones and amplifier microphones as well as dynamic microphones are adaptable to the transceivers without any jumper changing or soldering work inside the unit The input for carbon microphones is pin 3 for dynamic microphones pin 1 of the receptacle Up to two microphones pilot and co pilot can be connected Microphones with less than 30 Ohms must be matched by a transformer The shielding of the dynamic microphone cables must be routed separately Please refer to Chapter 3 2 1 Matching of microphones IMPORTANT o Panel jacks of PJ 068 type may only be used in connection with carbon microphones because of the common ground for microphone and PTT key If dynamic microphones without amp are used a ground loop during transmit would occur and this results in unstable modulation Intercommunication IC The intercom mode is assigned for noisy aircraft Communication is done via headsets and requires an on board wiring according Fig 3 8 3 9 which includes an IC switch During
30. lant This step may not degrade the electric contact e When routing the antenna cable sharp bends and unnecessary length are to be avoided e Installation of a folded top antenna in the vertical tail rudder is to be made by the aircraft s manufacturer Reprint July 1998 Page 3 7 FSG 70 FSG 71M OPERATION MANUAL W Dittel GmbH 3 4 On board Wiring Figures 3 7 to 3 9 show possible ways of connecting the FSG 70 FSG 71M 3 4 1 General Instructions for On Board Wiring Ensure good electrical contacts and interference suppression of all parts of the electrical system e g alternator ignition system etc also check for influences of vibration and corrosion Connecting wires are to be placed as far as possible from other wires carrying large currents antenna lines etc as well as control wires control cables etc Keep power lines at least 15 cm from the compass Use self extinguishing wires designed for at least 600 V complying with MIL W 5086C or MIL W 16878D Use only stranded wire to avoid broken wires caused by vibration The suggested cross sections should be kept Ground loops must be avoided The wires are soldered to the connector DA 15S Isolate the joints by shrinking sleeves or rubber tubes The transceivers are only protected against wrong polarity if a suitable fuse is installed We recommend a semi time lag acting fuse 2 5 A or an automatic circuit breaker 2 5 Amp If no suitable fuse is installed the unit
31. nhn nennen nn nn 3 3 Deviation of Compass by FSG 70 FSG 71M depending on the Distance between Center of Compass and Contour of Transceiver eene nennen nennen nnns 3 4 FSG 70 Dimensions Installation Drawing nn 3 5 FSG 71M Dimensions Installation Drawing nnn 3 6 Connector Assembling Sliding Lock Assembly ssssseseeene emen 3 8 FSG 70 FSG 71M Hook up Diagram without INTERCOM 1 2 Dynamic Micropnbones 3 9 FSG 70 FSG 71M Hook up Diagram using wire harness F10029 1 2 Dynamic Microphones and INTERCOM ener 3 10 FSG 70 FSG 71M Hook up Diagram 1 2 Standard Carbon Microphone s and INTERGOMS ere Eee t mc 3 11 Activating the AF EXTERNAL Input 3 13 Controls and Readouts esent enin nette ar nennt nnne n nnne 4 1 Title page July 1998 3 4 July 1998 ii July 1998 3 5 July 1998 iii July 1998 3 6 July 1998 iv July 1998 3 7 July 1998 1 1 July 1998 3 8 July 1998 1 2 July 1998 3 9 July 1998 2 1 July 1998 3 10 July 1998 2 2 July 1998 3 11 July 1998 2 3 July 1998 3 12 July 1998 2 4 July 1998 3 13 July 1998 2 5 July 1998 3 14 July 1998 2 6 July 1998 4 1 July 1998 2 7 July 1998 4 2 July 1998 2 8 July 1998 4 3 July 1998 3 1 July 1998 4 4 July 1998 3 2 July 1998 A 1 July 1998 3 3 July 1998 Page iv Reprint July 1998 FSG 70 FSG 71M W Dittel GmbH OPERATION MANUAL Section I Safety Information Every radio when transmitting radiates energy into the atmosphere that may under certain conditions cause the generation o
32. omatic squelch circuit with manual override and automatic adaptation to pulsed noise separate microphone inputs for low level dynamic and standard carbon mikes compressor for modulation level control a transmitter ON annunciator LED an intercom mode a wide supply voltage range of 9 7 to 15 2Vdc audio lowpass filter for CLIMAX environment additional AF input for application of external e g NAV audio internal lighting of the frequency display and a very comprehensive indication of Low Supply by flashing of the frequency display Audio output is delivered separately for speakers receive only and for headphones receive and transmit sidetone The transceivers can be supplied either direct from 12 14 Vdc buses or via a voltage converter Type S20000 from 28Vdc buses An automatic power saving circuit prevents unnecessary power consumption in some operating modes thereby extending the operating time available from one battery charge Particularly the no signal current drain in the squelch SQ mode is reduced to the very low level of approx 25 mA Page 2 2 Reprint July 1998 W Dittel GmbH 2 4 FSG 70 System Technical Data 2 4 1 General Data Model Operating voltage Emergency operation Power consumption Recommended fuse Temperature range Storage Temperature Altitude capability Vibration stability Front panel dimensions Installation depth measured from rear of panel Overall dimensions Weight Equi
33. owing symbols are used DANGER describes an immediate threatening danger Failing to observe the note may cause death or heavy injuries CAUTION describes a special note for operation Failing to observe the note may cause damage of the transceiver and or stored data may be deleted user programmed memory IMPORTANT describes explanations and other useful hints Failing to observe the note may cause degraded performance and or unsatisfying operation eu Page 1 2 Reprint July 1998 FSG 70 FSG 71M W Dittel GmbH OPERATION MANUAL Section II General Information 2 1 2 2 Introduction This installation and operation manual 027 HB OOE contains instructions and descriptions for application installation and operation of the FSG 70 and FSG 71M 760 channel VHF aircraft transceivers of WALTER DITTEL GmbH s FSG 70 SYSTEM The Service Manual 027 HB 10 contains detailed circuit description repair instructions alignment procedure testing instructions and a detailed Illustrated Parts List Application The transceivers of the FSG 70 System are fully transistorized VHF radios of monoblock construction for two way voice communications within the extended frequency range of 118 00 MHz to 136 975 MHz in 25 kHz increments 760 channels The equipment is well suited for reciprocating turbopropeller or turbojet engine aircraft as well as for helicopters with reciprocating or turbojet engines The equipment comply with applicable
34. pment category according to RTCA DO 156 RTCA DO 157 Performance category according to DO 160 A FSG 70 FSG 71M OPERATION MANUAL FSG 70 FSG 71M 13 8Vdc 10 20 9 7Vdc to 11Vdc Stand by 27mA typical Intercom 85mA typical Receive voice 140mA typical Transmit voice 1 5A typical Illumination 20mA additional 2 5 Amp semi time lag acting 20 C to 55 C short term 71 C 55 C to 85 C 15 000m 50 000ft MSL 0 1 5 27Hz 1 5g 27 500Hz 1g up to 2000Hz 57 2mm corresponds to 274 cut out 191mm approx 50mm for plug and wires W 63mm H 61mm D 237mm FSG 70 0 74kg 1 6lb FSG 71M 0 80kg 1 76lb Class C Class 4 D1 A MNO XXXXXXZBABZ The radios FSG 70 and FSG 71M fulfil the technical requirements of ICAO Annex 10 immunity against FM Broadcast Interference Reprint July 1998 Page 2 3 FSG 70 FSG 71M OPERATION MANUAL 2 4 2 Receiver Electrical Data Receiver type Frequency range Number of channels FSG 70 Number of channels FSG 71M Channel spacing Sensitivity Bandwidth Selectivity Squelch Gain control Spurious response Spurious radiation Distortion m 85 Frequency response Intermediate frequency Rated output Page 2 4 W Dittel GmbH Single superheterodyne 118 000MHz to 136 975MHz 760 760 of which 10 frequencies may be free programmed and permanently stored 25kHz 1 0yV for 6dB S N N 50 Ohms mod 1000
35. s can be damaged and no guarantee claim will be accepted Assemble connector according Fig 3 6 do not crush any wires Before plugging the connector to the unit check carefully the wiring particularly the and wiring After plugging secure the connector against loosening by pushing the sliding lock retainer For easy on board wiring only pin and socket connectors we have prefabricated cable assemblies on stock SOLDERING SIDE DA 15S 000000 oto MM SLIDING LOCK SLIDING LOCK POST LOCKED UNLOCKED TWO WASHERS SHRINKING SLEEVES OR RUBBER TUBES OPTIONAL OUTLET Fig 3 6 Connector Assembling Sliding lock Ass y Page 3 8 Reprint July 1998 FSG 70 FSG 71M W Dittel GmbH OPERATION MANUAL COM Antenna DA 15S Soldering Side PTT Key s in control stick if required Aircraft Speaker 30 W 4 Q F10061 Antenna Coax FSG 70 FSG 71M EGER ME I AP CD EU RE COM Antenna r To connect a Dyn Microphone 1 Second Microphone GND 2 microphone with Standard Microphone 3 PTT key or AF external 4 headset Intercom 5 RX Annunciator fr ZS EL WI E E E E ESER reece PTT Key 7 Illumination 12 V DC 8 4 f 9 Panel Light Battery 12 V DC Glen VE DT D D D Switch Battery 12 V DC 10 Battery GND 11 Battery GND 12 PTT Key Not connected
36. s fully visible when frequency is changed For transmit operation select the desired frequency depress the push to talk button and speak into the microphone The microphone must be kept close to the lips in order to cancel noise like from the engine etc Enunciate clearly at a constant loudness During transmit operation the yellow LED TX indicator will light on the front panel signaling that the push to talk button is depressed During receive operation rotate the VOL knob for desired volume IMPORTANT e fradio is battery powered frequent transmitting and loud receiver volume reduce available operating time Page 4 2 Reprint July 1998 4 3 4 4 4 5 FSG 70 FSG 71M W Dittel GmbH OPERATION MANUAL Programming the Channel Frequency Memory FSG 71M only The FSG 71M transceiver is equipped with 10 memory cells which are able to store one frequency each in the range from 118 000 to 136 975 MHz The stored frequencies are non volatile 1 Rotate channel selector knob fully clockwise 2 Select the desired frequency by rotating MHz and kHz knobs 3 Rotate channel selector knob to desired channel number 1 to 10 4 Enter the frequency by depressing approx 1 sec the store button STO into the memory If a frequency is already stored in that certain channel it will be overwritten The function of the STO button is electrically delayed to reduce memory loss caused by accident touching Recall of Stored Frequencies
37. t LEES 2 1 2 2 ApplICatiOT cer er rn rr er ree eme ere e nerit ene ner ln ne dU e 2 1 2 3 Brief Description io et ER re EIE To E eR CERE MER de iade M teer e RE deed des 2 2 24 FSG 70 System Technical Data oie ieu ek eee boe ecce ree be E dee pice 2 3 2 4 4 General Data erc ee re FI e Lege ed sued sag des Hae du EEN 2 3 242 Receiver Electrical Data edt tette nie p ak ett ebd aeaaea 2 4 24 3 Transmitter Electrical Data uttter e ta onion e e e estaban 2 5 2 4 4 Additional features icc eire Re epe e a ite iti ea He tee tala 2 5 2 5 Units and Accessories supplied cccccececeeeeeeeeeeeeeeeeeeeeeeeeeeeeaaeaaeeeeeeeeeeeeeeeeaaaaaeees 2 6 2 6 Accessories required but not supplted 2 6 2 7 Summary of the FSG 70 System ANEN 2 7 Section Ill InstallatiO i iiio it EE AER ASRRADRSARRRASARERRRRRRDRCrRMRxER ORE CE RM KE dn EE RC KE KNEE 3 1 3 1 General e tal RR Or eR MPO EEG ta e axo a e dede 3 1 3 2 Pre installation Check 3 1 3 2 1 Matching the Microphones nenne ener enne nennen S ATi 3 2 elle Tier 3 2 3 3 Mechanical Installaton mme nnne nnne nnne 3 4 3 3 1 Installation of the Transceiver eene nnne 3 4 3 9 2 Influence on Compass xii ie e ete ert n d esee a rotae ted e La Er Ree o ds 3 4 323 3 Antenna Installation sic satis tases ee eei tet er hd rp reget taedet deeds de po el dee 3 7 3 4 On board WIRING iier trien etre Ip e REY EEGENEN Er eae eh augue 3 8 3 4 1 General Instructions for On Board Wiring
38. tery GND 11 J PTT Key Batterie GND 12 9 as required Not connected fen 13 Dyn Mike Headphone 14 Aircraft Speaker 15 Ph i AWG 18 20 Mon m 0 6 0 75mm DA 15S red Headset or AWG 18 20 Microphone with 0 6 0 75mm PTT Key blue Battery Power Supply 12 V 6 5 Ah F10023 Ki Cable Harness A N F10029 3 2 Metre 10ft NOTES DO NOT wire other pins than noted Unless otherwise noted all wires 22 AWG 0 3 0 4 mm INTERCOM operation requires a microphone which provides audio OUT with the PTT key de energized not keyed Built in Automatic Circuit Breaker when using Walter Dittel Battery Power Supply A N F10023 Length of pre fabricated wire harness F 10029 3 2m 10ft nisu iber and coax antenna cable are not included in wire harness F10029 Fig 3 8 FSG 70 FSG 71M Hook up Diagram using wire harness F10029 1 2 Dynamic Microphones and INTERCOM Page 3 10 Reprint July 1998 FSG 70 FSG 71M W Dittel GmbH OPERATION MANUAL DA 15S Soldering Side COM Antenna 470R X AF External Input Antenna Coax e g NAV COM2 MKR RG 58 C U 470 Re FSG 70 FSG 71M il UG 88 U Audio OUT to Audio Panel IT INTERCOM as required COM Antenna C Switch AWGDO I gt Aircraft Speaker Headphone i SE Speaker Spare is Aircraft GND am Aircraft GND 11 AWC 20 Power 413 75 VDC 10 Pilot Power 13 75 VDC 9 H eee zi Headphone Illumination
39. to Section 4 3 or 4 4 STO button Push button By depressing the STORE button the displayed frequency is entered in one of the 10 electronic memories provided that the CHAN switch is at one of the 1 through 10 position 4 2 Operating Instructions Turn ON the transceiver with the right toggle switch lever up ON Select the desired operating frequency by rotating the increment decrement knobs either clockwise or counterclockwise A clockwise rotation will increment the previous frequency while a counterclockwise rotation will decrement the previous frequency The larger inside knob will change the MHz portion the smaller outside knob will change the kHz portion At one band edge 000 or 975 kHz the following 25 kHz change will wrap around to the other band edge FSG 71M To select the desired operating frequency rotate the channel selector fully clockwise To tune the radio to a stored operating frequency rotate the channel selector switch to the desired channel no 1 to 10 The receiver is always tuned to the frequency appearing in the display Set the left toggle switch to Squelch OFF position lever down to override the automatic squelch and rotate the VOL knob for desired listening level on the noise being produced by the receiver Set the left toggle switch to SQ lever up to activate the automatic squelch A warm up period is not required However at temperatures of 20 C the LC display needs approx 1 sec until it i
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