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58

FT-847 O

PERATING

M

ANUAL

AM T

RANSMISSION

The FT-847 includes provision for AM transmission using an early-stage modulator.

•

Connect your microphone to the front panel

MIC

jack. Preset the

MIC

(G

AIN

) control fully counter-

clockwise.

‚

Press the

FM/AM

mode key, as necessary, to select

the “

AM

” operating mode.

ƒ

Rotate the

MAIN VFO

Tuning Dial to set the oper-

ating frequency.

„

Close the microphone’s

PTT

switch, and adjust the

RF PWR

control so that the power output is 33%

of the rated maximum output for the band in use
(i.e. 33 Watts on 1.8 ~ 54 MHz, or 16.5 Watts on
144/430 MHz). This is the setting of the carrier
level which ensures adequate power for the modu-
lation sidebands. To activate transmission, you may
also use the front panel’s

MOX

switch, if you pre-

fer.

…

Advance the

MIC

(G

AIN

) control clockwise while

speaking, at a normal voice level, into the micro-
phone. Advance the gain to the point where a slight
upward deflection in the power output reading is
observed on voice peaks. This is the point where
approximately 100% modulation is achieved.

†

Release the

PTT

(or

MOX

)

switch to return to the

receive mode.

OPERATION

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Содержание FT-847

Страница 1: ...90703 U S A YAESU EUROPE B V P O Box 75525 1118 ZN Schiphol The Netherlands YAESU UK LTD Unit 12 Sun Valley Business Park Winnall Close Winchester Hampshire SO23 0LB U K YAESU GERMANY GmbH Am Kronber...

Страница 2: ...ocessor Operation 45 Voice Monitor 45 SSB TX Frequency Response 45 CW Transmittion 46 Straigh Key External Keying Device Operation 46 Electronic Keyer Operation 48 FM Transmission 50 Channelized Frequ...

Страница 3: ...nd full duplex capability with normal inverted tracking for satellite work built in low noise preamplifiers DSP Noise Reduction Notch and Bandpass Filters AFSK I O port for teletype HF packet AMTOR or...

Страница 4: ...n Receive Squelched 1 5A Receive Max Audio 2 0A Transmit 22A 100W RF output Case Size 260 W x 86 H x 270 D mm 10 24 x 3 39 x 10 63 Weight Approximately 7 kg 14 4 lbs TRANSMITTER Power Output 160 6m 10...

Страница 5: ...MHz 2 V 28 30 MHz 2 V 0 25 V 50 54 MHz 1 V 0 20 V 144 430 MHz 0 5 V 0 16 V Image Rejection Better than 60 dB IF Rejection Better than 60 dB Selectivity 6 60 dB SSB CW 2 2 kHz 4 5 kHz CW N 0 5 kHz 2 0...

Страница 6: ...r Collins Mechanical Filter YF 115C CW Filter Collins Mechanical Filter FC 20 Automatic Antenna Tuner ATAS 100 Active Tuning Antenna System FVS 1A Voice Synthesizer Unit MMB 66 Mobile Mounting Bracket...

Страница 7: ...5 FT 847 OPERATING MANUAL Plug Pinout...

Страница 8: ...FT 847 but the 13 8V DC input voltage 22 Ampere current capability and DC cable polarity guidelines described above must be strictly followed Note that other manufacturers may use the same type of DC...

Страница 9: ...ice heat shrink tubing plus black electri cal tape work well r Be sure that the POWER switch on the FT 847 is OFF when connecting the DC cable s connector to the rear panel 13 8VDC jack r Be sure that...

Страница 10: ...cable such as the discarded shield from type RG 213 coaxial cable and strong cable clamps to secure the braided cables to the ground rods Be sure to weatherproof the connections to ensure many years...

Страница 11: ...your transmitted signal l Unintended frequency change l Blinking or blanking of the frequency display l Noise pickup and or l Loss of memory Note that these conditions may occur in any commu nication...

Страница 12: ...e Station Antenna Installations When installing a balanced antenna such as a Yagi or dipole remember that the FT 847 is designed for use with an unbalanced coaxial feedline Always use a balun or other...

Страница 13: ...l antenna can carry lethal volt ages outward from the center of the antenna in the event of a direct lightning strike ANTENNA CONSIDERATIONS Mobile Antenna Installations Mobile antennas for the HF ban...

Страница 14: ...lly in the case of 430 MHz directional arrays The 50 Watt power output supplied by the FT 847 combined with the directivity of a beam antenna can cause immedi ate heating of human or animal tissues an...

Страница 15: ...of the transceiver Place the transceiver on a hard flat stable surface Avoid heating vents and window locations that could expose the transceiver to excessive direct sun light especially in hot climat...

Страница 16: ...e range 0 to 4V DC The T R control lines are transistor open collector circuits capable of handling positive amplifier relay coil voltage of up to 24V DC and current of up to 100 mA Important Note Do...

Страница 17: ...et for the configuration you desire on that particular band If you wish to use both the internal preamplifier and a very low noise tower mounted preamp set Menu 29 and or 30 to INT and supply DC power...

Страница 18: ...e TNC s PTT line to the DATA IN OUT terminal Note If you use the rear panel s PTT jack for AFSK operation the transceiver will operate in the SSB mode with the microphone connected Activating PTT via...

Страница 19: ...Control line Pin 6 of the PKT jack Note that 9600 bps packet transmit deviation adjust ment is very critical to successful operation and can only be accomplished using a calibrated deviation meter suc...

Страница 20: ...with an external memory keyer providing for manual sending it usually is possible to connect the keyed lines together via a Y connector as shown below Check with the documentation accompanying your ke...

Страница 21: ...19 FT 847 OPERATING MANUAL Installation NOTE...

Страница 22: ...ontrols Switches 3 TUNER Switch This switch activates the optional external FC 20 Automatic Antenna Tuner of the optional ATAS 100 Active Tuning Antenna System A momentary touch of this switch places...

Страница 23: ...the CW mode pressing this switch activates the built in Electronic Keyer circuit When ac tivated the KEYER icon will appear on the display panel 11 RF AMP Switch This switch turns the receiver RF prea...

Страница 24: ...t also selects the low deviation mode required for HF FM operation on 29 MHz Press this switch to select the Narrow mode the NAR icon will appear on the display panel 17 MODE Switches Pressing one of...

Страница 25: ...is mode the MAIN VFO Tuning Dial is used to control the uplink transmit frequency during satellite operation TRACK AuB In this mode the Main and Sub VFOs are slaved so that they change frequency toget...

Страница 26: ...sed for crossband satellite operation The icon will appear on the display panel during satellite operation 29 MCK W Switch Pressing this switch momentarily checks the contents of the current memory ch...

Страница 27: ...AR icon will appear on the display panel The SUB TUNE knob is used for Clarifier adjustment and the available offset range is 9 99 kHz 39 SUB TUNE Knob This knob is the tuning dial which controls the...

Страница 28: ...0is activated Main Band Frequency Display Field Main Band Operating Mode Icons Lower Sideband Upper Sideband CW AM FM Narrow Filter is engaged FM Packet Baud Rate 9600 bps FM Packet or SSB DATA Transm...

Страница 29: ...ess Antenna system SWR is too high MENU Menu mode has been activated Sub Band Tone Icons CTCSS Encoder is active CTCSS Decoder is active Digital Code Squelch Encoder Decoder is active CAT System data...

Страница 30: ...le computer assisted operation Use a null modem not straight RS 232C serial data cable no level converter or other hardware interface should be required Rear Panel Connectors 5 TUNER Connector This 8...

Страница 31: ...on to this jack returns the transceiver to the Receive mode Open circuit voltage is 5V DC and closed circuit current is 1 mA Note This jack is designed to be used for external PTT input only Do not at...

Страница 32: ...nnas have been securely connected to the correct rear panel jack Preset the controls as follows POWER MOX switches Off n RF PWR RF GAIN Fully clockwise maximum MIC AF GAIN 10 o clock SQL KEYER SPEED F...

Страница 33: ...Mode switch repeatedly to toggle between the selections available for that mode SSB LSB USB CW CW USB CW LSB FM AM FM AM Press the BAND p or q keys as necessary to set the desired operating band Rota...

Страница 34: ...he TX RX icon will become illuminated Pressing the Au tB key swaps the contents of the Main and Sub VFOs In the Satellite mode this does not change the RX TX or TX RX configuration it just reverses th...

Страница 35: ...tored memory frequency NOTE Locking the Front Panel Controls Switches Press the LOCK key to lock out certain of the front panel controls and switches so as to pre vent accidental frequency or band cha...

Страница 36: ...5 FM 5 6 25 10 12 5 15 20 25kHz HF 5 kHz 50 MHz 5 kHz 144 MHz 5 or 25 kHz 430 MHz 25 kHz RECEIVER OPERATION UP AND DWN SCANNING KEYS MICROPHONES The UP and DWN switches on the microphones when presse...

Страница 37: ...h to operate l Now enter the decimal point l in the fre quency this key is shared with the T CALL function and is located just to the right of the 6 key l Enter any desired remaining digits of the fre...

Страница 38: ...by reducing the receiver system gain and minimizing the chances of degraded recep tion due to overload or intermodulation distortion To activate the receiver preampli fiers push the RF AMP key The RF...

Страница 39: ...he NB icon will disappear from the display Note that the IF NOISE BLANKER may under crowded band conditions with extremely strong signals cause a slight degradation in overload immunity or it may crea...

Страница 40: ...off press the NR switch again The NR icon will disap pear from the display OPERATION RECEIVER FEATURES SQUELCH RECEIVER MUTING The SQUELCH circuit allows muting of the receiver s audio circuits during...

Страница 41: ...tion See page 88 Dealing with Interference The FT 847 includes a wealth of features designed to facilitate single signal reception during conditions of heavy interference These features are described...

Страница 42: ...control s function is dedicated to the receive mode and does not affect your trans mitted signal characteristics such adjustment of the transmitted signal is however provided via Menu items 92 and 93...

Страница 43: ...be resolved by switching to a narrower filter or by adjustment of the IF SHIFT control And there sometimes are operat ing situations requiring a mode change from for ex ample LSB to CW if the wrong si...

Страница 44: ...42 FT 847 OPERATING MANUAL OPERATION NOTE...

Страница 45: ...capabilities in the transmit mode The transmitter can be activated within any of the 500 kHz segments detailed below which contain the HF amateur bands as well as 50 54 MHz 144 146 or 144 148 MHz and...

Страница 46: ...e You may wish to reset the TX Multimeter back to PO via Menu 24 at this time see previ ous discussion For operation at lower power levels rotate the RF PWR control counter clockwise while watching th...

Страница 47: ...at your voice or your microphone may have particular characteristics ex cessive treble or bass which may warrant minor ad justments to the TX CARRIER POINT This feature pro vided via Menu 92 USB and 9...

Страница 48: ...ntrols as follows MODE CW PPOC KEYER Off No icon in this regard should be present on the LCD RF PWR Fully Clockwise MONI On To transmit simply press the straight key or start sending on your external...

Страница 49: ...ilable range of adjustment is 10 300 ms l Press the MENU key to exit the Menu mode Although the FT 847 was not designed for full QSK operation the minimum setting of Menu 9 10 ms will be very close to...

Страница 50: ...a Menu 7 although the default 3 1 ra tio should normally be used See page 84 if you need to make this adjustment CW SPOT FEATURE During CW operation it is useful to be able to zero in precisely to the...

Страница 51: ...49 FT 847 OPERATING MANUAL OPERATION CW TRANSMISSION...

Страница 52: ...some what inconvenient for FM operation since most all stations operating in the FM mode use a channelized frequency which is generally a multiple of either 5 kHz or 6 25 kHz Therefore we recommend th...

Страница 53: ...ess the MENU button to activate the Menu mode of operation l Rotate the SUB TUNE knob to select Menu 25 FM PSET l Rotate the MEM VFO CH knob to adjust the mic gain You may select from the default valu...

Страница 54: ...from the display During operation you may wish to check the input frequency to the re peater to see if the other station is strong enough to be worked on sim plex To do this press the 2 REV key on the...

Страница 55: ...s an incoming sig nal containing a matching CTCSS signal is re ceived When the Decoder is activated both the ENC and DEC icons will appear To activate the Encoder press the 3 TONE key once To activate...

Страница 56: ...er reply from the repeater Otherwise you may continue with the trans mission The A B C and D keys are generally used only for re peater control by a Control Op erator consult your repeater s autopatch...

Страница 57: ...eful for emergency portable work in a remote area to extend the range of a dual band hand held trans ceiver However please remember these points before using the cross band repeater function l Check t...

Страница 58: ...ATION Set the transceiver to the desired operating fre quency You may find it more convenient to use the MEM VFO CH knob to set the frequency in the FM mode because of the channelized nature of most p...

Страница 59: ...the TNC s PTT line via the DATA IN OUT jack per the diagram on page 16 Set the RF PWR control to the 12 o clock posi tion Using the keyboard of the computer connected to your TNC you may now issue th...

Страница 60: ...t is 33 of the rated maximum output for the band in use i e 33 Watts on 1 8 54 MHz or 16 5 Watts on 144 430 MHz This is the setting of the carrier level which ensures adequate power for the modu latio...

Страница 61: ...ND keys as necessary to locate the Emergency Channel which will be located between the 3 5 MHz and 7 MHz bands Note that the receive mode CLARIFIER functions nor mally while using this frequency but v...

Страница 62: ...need to use the FC 20 on the 50 MHz band If so using Menu 28 route the power output on 50 MHz via the HF antenna jack see page 87 Set the RF PWR control fully clockwise Press the front panel s TUNER...

Страница 63: ...t to adjust or repair your antenna system so as to correct the high SWR condition ANTENNA TUNER FC 20 OPERATION The FC 20 working in concert with the FT 847 can store impedance matching data in its mi...

Страница 64: ...uning of the ATAS 100 for operation on the new band Although there is no memory of antenna posi tion the ATAS 100 will raise or lower itself in the correct direction if it has successfully achieved an...

Страница 65: ...e ready for op eration successful tuning Replace the cable or try adding a few feet meters of cable to eliminate the possi bility of adverse transformer action in the 50 cable during the tuning proces...

Страница 66: ...uB key to transfer the contents of the Main VFO into the Sub VFO Press the SPLIT key momentarily The FT 847 will now transmit using the Sub VFO frequency and will receive using the Main VFO frequency...

Страница 67: ...65 FT 847 OPERATING MANUAL OPERATION NOTE...

Страница 68: ...er operating mode as well This is different from Split operation where transmission and reception are not occurring simultaneously the SPLIT key should not be used during satellite operation OPERATION...

Страница 69: ...beep will be heard The M CK icon on the LCD will blink Now press and hold in the MCK W key for second until a double beep is heard this will lock the current frequency pair into Satellite Memory regi...

Страница 70: ...mory registers may be loaded with different satellite transponder frequency pairs so as to accommodate Mode A Mode B Mode J Mode T and various uplink and downlink combinations on different satellites...

Страница 71: ...ies a special feature of these memory channels is the alpha numeric labeling Tag which can be appended to each memory This can be particularly useful if you wish to preset a num ber of satellite memor...

Страница 72: ...VFO mode press the QMB STO key momentarily to store the frequency Note The QMB system is capable of memorizing l Operating frequency l Operating mode l Receiver filter Wide Narrow l Clarifier informat...

Страница 73: ...hannel one where no frequency display is found In the above illustration this is channel 15 Press the MCK W Memory Check and or Write key for second A double beep will be heard and the Main Frequency...

Страница 74: ...tion channel 62 Press the MCK W key once more for second a double beep will again be heard confirming that the Receive frequency data is now stored Now set the Main VFO to the desired Transmit fre que...

Страница 75: ...ub VFO Display field is not the Trans mit frequency during Split memory operation Note If you move the MAIN VFO Tuning Dial or the SHUTTLE JOG ring while in the Memory mode you can change frequencies...

Страница 76: ...econd This stores the frequency data into the HOME channel location If you wish to store a Split frequency pair into the HOME channel store the Receive frequency in steps above Now set the Main VFO to...

Страница 77: ...l Operating mode l Receiver filter Wide Narrow l Clarifier information direction and magnitude l Repeater shift information direction and mag nitude l CTCSS Tone information CTCSS Encode Decode On Off...

Страница 78: ...ll return to the original frequency then scan downward in fre quency loading another 10 channels When all 20 SMART SEARCH channels are loaded scanning will stop and the transceiver will return to the...

Страница 79: ...back ground noise is just silenced Press the keypad s 5 PRI key momentarily to initiate the Priority mode The FT 847 will con tinue to operate normally on the current frequency but every five seconds...

Страница 80: ...to open the squelch In the FM AM modes the scan ner will halt and pause on that channel in accor dance with the hold time set via Menu 26 see page 86 In the SSB CW modes the scanner will slow down but...

Страница 81: ...chan nel number While operating in the Memory mode press the MCK W key momentarily Rotate the MEM VFO CH knob to select the chan nel number to be skipped When the correct channel number is shown in th...

Страница 82: ...g VFO scanning however scanning will be restricted to the frequency range established by the L and U memories The transceiver will beep when a sub band limit is reached If the scanner encounters a sig...

Страница 83: ...the Memory mode select the operating frequency of the station transmitting the WeatherFax broadcast Note that in the USB mode the frequency you should program onto the display is typically 1 90 kHz b...

Страница 84: ...TING The Menu system is easy to activate and set Use the following procedure Menu System Press the MENU key momentarily Rotate the SUB TUNE control to select the Menu item to be adjusted Rotate the ME...

Страница 85: ...80 Hz 22 Beep Tone Audio Level 0 63 32 23 FM Packet Baud Rate 1200 9600 bps 1200 bps 24 Tx Mode Multimeter Readout PO ALC PO 25 FM Mode Mic Gain Off 0 63 32 26 Scan Resume Pause Time Off 3 5 10 Sec 5...

Страница 86: ...esizer steps in the FM mode when using the MEM VFO CH knob Available Values 5 6 25 10 12 5 15 20 25 kHz Default Setting HF 5 kHz VHF UHF Depends on trans ceiver version U S A European etc This setting...

Страница 87: ...26 243 244 245 246 251 252 255 261 263 265 266 271 274 306 311 315 325 331 332 343 346 351 356 364 365 371 411 412 413 423 431 432 445 446 452 454 455 462 464 465 466 503 506 516 523 526 532 546 565 6...

Страница 88: ...tting is fixed via this Menu item and does not depend on the setting of the AF GAIN control 23 PKT RATE Function Set the transceiver s circuitry for the Packet baud rate to be used Available Values 12...

Страница 89: ...z Available Values INT The internal RF preampli fier will be used with ON OFF control provided via the front panel s RF AMP switch ANT The internal RF preampli fier is disabled and 12 VDC at 300 mA ma...

Страница 90: ...key will not respond when you push it 34 SAT MTR Function Set mode of the meter s lower scale below S meter during Satellite operation Available Values DISC Display of Discriminator centering of incom...

Страница 91: ...that the desired transmit and receive fre quencies have been set and that the Squelch is closed BUSY should not be visible on the LCD before ini tiating the Cross Band Repeat mode 90 DCS DEC Function...

Страница 92: ...ment allows you to shift the IF passband so as to roll off excessive bass or treble frequencies depending on your voice pattern microphone fre quency response etc The TX Carrier Point may be adjusted...

Страница 93: ...e utilized on earlier Yaesu CAT System transceivers CAT COMPUTER AIDED TRANSCEIVER SYSTEM PROGRAMMING Yaesu Musen does not produce CAT System operat ing software due to the wide variety of personal co...

Страница 94: ...D1 2A CTCSS ENC DEC ON D1 4A CTCSS ENC ON D1 8A CTCSS DCS OFF P1 0A Set to MAIN VFO P1 1A Set to SAT RX VFO P1 2A Set to SAT TX VFO CTCSS Frequency D1 P1 D1 00h 3Fh Tone Frequencies per chart on page...

Страница 95: ...any value The resulting five bytes are then sent opcode last from the computer to the FT 847 CPU via the computer s serial port and the transceiver s CAT jack All CAT data values are hexadecimal Note...

Страница 96: ...data is to be transferred Use Menu 94 CLN RATE to set an identical data speed for both transceivers either 9600 or 57600 bps Transceiver to Transceiver Cloning On the transceiver which will receive t...

Страница 97: ...eive and the TX filter is always used on Transmit As shipped from the factory compact Ceramic filters are installed in both SSB filter locations The information below will describe the benefits gained...

Страница 98: ...ws and loosen the two front panel mounting screws then fold the front panel down Inside the front panel locate the unconnected 10 pin jack and connect the FVS 1A here see Figure 5 Set the JApanese ENg...

Страница 99: ...fault con dition so as to determine whether or not a part failure has caused improper action as opposed to some op erational error This section describes the procedures to be used for these situations...

Страница 100: ...s present check to ensure that KEY plug in use is 3 conductor Ste reo type not 2 conductor If using computer driven keying interface ensure that proper computer port COM or LPT and any required TSR pr...

Страница 101: ...AFSK DATA IN input pin Tip of DATA IN OUT jack Ensure that PTT line is properly connected to FT 847 rear panel DATA IN OUT or PKT jack as ap propriate Ensure that TX AUDIO output level from TNC is pr...

Страница 102: ...y only be about 250 Hz adjust the CLAR control ap propriately Perhaps the ultimate challenge in amateur radio is com munication achieved by bouncing signals off our planet s moon Moonbounce or EME com...

Страница 103: ...or some other international time standard On 432 MHz 2 minute calls are sometimes used especially during schedules be sure to match the calling pattern of the other station EME contacts follow a signa...

Страница 104: ...Accordingly con nect your keying and decoding devices in a manner similar to that recommended for HF Packet and other AFSK Data operation Remember that the AFSK output level from the DATA IN OUT jack...

Страница 105: ...ting practices for HSCW meteor scat ter are somewhat different throughout the world only general guidelines will be presented here Consult with your local VHF UHF weak signal society for specific oper...

Страница 106: ...tent is to exchange information not known in advance to the other party If you are missing some piece of information the fol lowing format is used to request a repeat BBB Both callsigns are needed MMM...

Страница 107: ...This device complies with Part 15 of the FCC rules Operation is subject to the condition that this device does not cause harmful interference...

Страница 108: ...9911I GK leading the way SM Copyright 1998 Yaesu Musen Co Ltd All rights reserved No portion of this manual may be reproduced without the permission of Yaesu Musen Co Ltd E 1 1 7 9 1 0 0 5...

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