ft 897 owners manual

FT-897 O Page 42 PERATING ANUAL. The receiver’s audio output and S-meter are dis- abled when using the Spectrum Scope. FT-897 O Page 45 PERATING ANUAL. FT-897 O Page 48 PERATING ANUAL. For example, on a DX- pedition, the FT-897 beacon might be activated on a 50 MHz frequency, to alert DXers as to possible band openings. For example, the dis- play may be configured to show a different color accord-ing. FT-897 O Page 52 PERATING ANUAL. FT-897 O Page 53 PERATING ANUAL. FT-897 O Page 54 PERATING ANUAL. DIG (USER-L or USER-U) mode operation.FT-897 O Page 57 PERATING ANUAL. The CT-62 has a built-in level converter, allowing direct connection from the. Now turn the “source” radio off. 7. Remove the clone cable. Channel and operating data for both radios are now identical. They both may be turned on now for normal operation. FT-897 O Page 63 PERATING ANUAL. Operation is subject to the following two conditions; (1) this device may not cause harmful interference, and (2) this device must accept any interference including interference that may cause undesired operation. Operating Manual PDF presentation brochure for Yaesu FT 897 (FT-897 FT897): Yaesu. FT-897 brochure PDF Service Manual with schematics for Yaesu FT 897 (FT-897 FT897): Yaesu. Introduction. The FT-897 is a rugged, innovative multiband, multimode portable transceiver for the. Providing coverage of the 160-10 meter bandsFM, and Digital modes, yielding the most comprehensive performance package availableDesigned for use from (1) an external DC power source, (2) internal battery (requiresExternal AC Power Supply), the FT-897 provides 100 watts of power output from aWhen using the optional FNB-78 NiMH Battery Pack, the FT-897 automatically switches to 25 Watts of output power.

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Unit 12, Sun Valley Business Park, Winnall Close Winchester, Hampshire, SO23 0LB, U.K. FT-897 O Page 2 PERATING ANUAL. The 20 Watt power output sup- adequate ventilation around the cabinet of the FT-897. The plied by the FT-897, combined with the directivity of a beam cooling system of the transceiver must be free to draw cool. FT-897 O Page 14 PERATING. FT-897 O Page 15 PERATING. FT-897 O Page 16 PERATING. FT-897 O Page 17 PERATING. When shut- 3.5 MHz 18 MHz BAND ting down, please turn off the POWER switch on the FT- 897 before turning off the MAIN switch on the FP-30. See pages 54, 57, By default, the FT-897 begins operation in the “fine tun- and 59 for details.FT-897 O Page 23 PERATING ANUAL. This allows you to set up a higher or lower listening pitch, if you prefer such as compared to the default passband response. See page 55. FT-897 O Page 24 PERATING ANUAL. Do not activate this filter in the CW mode, as incoming CW signals will be notched out of the audio passband. FT-897 O Page 26 PERATING ANUAL. FT-897 O Page 28 PERATING ANUAL. Each operator’s voice pattern is different, so try several settings to find the one which is best for your voice. FT-897 O Page 29 PERATING ANUAL. FT-897 O Page 31 PERATING ANUAL. In this situation, you will observe the “TEN” indicator on the display. If FT-897 O Page 32 PERATING ANUAL. FT-897 O Page 33 PERATING ANUAL. It is a newer, more advanced tone system that is tion via the Menu mode. FT-897 O Page 35 PERATING ANUAL. If not, new setting and exit.For BPSK work, the in- 9600 bps packet, and setup is similar to that described pre- jection does not matter, but for QPSK the two working sta- viously for SSB-based modes. The “TUNE” icon will then disappear from the LCD, and you will be ready for operation. FT-897 O Page 40 PERATING ANUAL. Do not set up. It simply sends a signal to the microprocessor that an indepen- dent Transmit frequency is being stored on the same chan- nel as a previously-stored Receive frequency.

Always observeIn mobile installations, noise pickup may be minimized by connecting the DC cableTips for Successful Mobile Installations:Be certain to solder the connections at the spliceCaution. Permanent damage can result if improper supply voltage, or reverse-polarity voltage, isThe Limited Warranty on this transceiver does not cover damageVertex Standard Co., Ltd.When replacing fuses, be certain to use a fuse of the proper rating. The FT-897 requires aAC power source operation (requires optional FP-30 AC power supply). For base station installations, Yaesu recommends the use of the FP-30 AC power supply. InstallationOperationInternal battery operation (requires optional FNB-78 Ni-MH battery pack). The optional FNB-78 Ni-MH Battery Pack provides 13.2 Volts of DC power for your FT897, with a maximum capacity of 4800 mAh (you may install the two FNB-78 into the. FT-897, in this time, maximum capacity is 9.6 Ah!). InstallationVertex Standard Co., Ltd.FNB-78 installed.Charging. Charging of the FNB-78 requires the use of the optional PA-26 Battery Charger and. CD-22 Charge Adapter.CD-22 Charge Adapter, then insert the cable plug from the CD-22 into the “CHG-A”AC wall outlet.When charging is completed, the red. LED indicator will change to green (Fully Charged). A fully-discharged pack will beOperation. Before turn the radio on, select the battery to be used by top panel’s A-B switch. Grounding. The provision of an effective ground system is important in any successfulA good ground system can contribute to station efficiency in aVertex Standard Co., Ltd.An effective earth ground system may take several forms; for a more complete discussion,The information presented below is intendedMobile Station Grounding. Although satisfactory grounding in most installations will be achieved via the DC cable’sNote that these conditions may occur in any communications installation.

The multi-function Liquid-Crystal Display includes various backlighting, which may beThe display includes bar-graph indication of powerAlso include are a number of operatingAmong the advanced features of the FT-897 are many incorporated only in large basestation transceivers. These include Dual VFOs; Split-Frequency operation; Digital. Signal Processing (Bandpass Filtering, Noise Reduction, Notch, and MicrophoneVOX; Built-in Electronic Keyer; Adjustable CW Pitch; Automatic FM Repeater ShiftMemories; Automatic Power-Off (APO) and Time-Out Timer (TOT) functions; Computer. Interface capability; and Cloning capability. We urge you to read this manual in its entirety, so as to gain a full understanding of theVertex Standard Co., Ltd.Specifications. General. Frequency Range. Receive:Transmit: 160 - 6 MetersAlaska Emergency Frequency (USA only). Emission Modes. F1 (9600 bps packet), F2 (1200 bps packet). Synthesizer Steps (Min.). Antenna Impedance:Operating Temp. Range. Frequency Stability:Supply Voltage. Current Consumption. Squelched: 500 mA (Approx.). Receive: 1 A. Transmit: 22 A. Case Size:Weight (Approx.). Transmitter. RF Power Output. HF-50MHz:Modulation Types. SSB: Balanced Modulator. AM: Early Stage (Low Level). FM: Variable Reactance. FM Maximum Deviation. Vertex Standard Co., Ltd.Spurious Radiation:Carrier Suppression. SSB Frequency Response:Microphone Impedance:Receiver. Circuit Type. Double-Conversion Superheterodyne. Intermediate Frequencies:Sensitivity:Squelch Sensitivity. Image Rejection:IF Rejection:AF Output. AF Output Impedance:Vertex Standard Co., Ltd.Supplied Accessories. Available OptionsNi-MH Battery ChargerVertex Standard Co., Ltd.Installation. Power Connections. The FT-897 is designed use from (1) an external DC power source, (2) internal batteryExternal DC power source operation. The DC power connector for the FT-897 must only be connected to a DC source providing.

All effortsFor reference, the chart below shows approximate loss figures for typically- availableAlways locate antennas such that they can never come in contact with outdoor powerGround yourIn the event of an approaching electrical storm, disconnect all antenna lead-in, rotatorIf a lightning storm is in progressRF Field Exposure. This transceiver is capable of power output in excess of 50 Watts, so customers in the. United. StatesFederal. Communications Commission (FCC) regulations concerning maximum permissibleCompliance is based on the actual power outputInformation regarding these regulations may be available from your Dealer, your localRadio Relay League, Inc. (225 Main St., Newington CT 06111 or ). Although there is negligible radio frequency (RF) leakage from the FT-897 transceiverDuring mobile operation, do notNever stand in front of an antenna (during testing or operation) when RF power isThe 20 Watt power outputElectromagnetic Compatibility. If this transceiver is used with, or in the vicinity of, a computer or computer-driven. Interference (RFI) suppression devices (such as ferrite cores) to minimize interference toComputer-generated RFI isBe certain to use only shielded cables for TNC-to-Transceiver connections. You may needEspecially check “RF holes”For further information, consult amateur radio reference guides and publicationsHeat and Ventilation. To ensure long life of the components, be certain to provide adequate ventilation aroundThe cooling system of the transceiver must be free to draw coolDo not install the transceiver on top of another heat-generating device (such as a linearAvoid heating vents and window locationsLinear Amplifier Interfacing. The FT-897 provides the switching and drive-control lines required for easy interfacingThese include:The rear-panel ACC jack is a miniature stereo type, which accepts ALC control voltage. The main shaft isTypical amplifier interface circuits are shown below.

The FT-897Yaesu does not recommend the use of “on glass” mobile antennas unless the shield of theSuch antennasBase Station Earth Grounding. Typically, the ground connection consists of one or more copper-clad steel rods, drivenVertex Standard Co., Ltd.Be sure to weatherproof the connections to ensure many years of reliable service. UseDo not use gas line pipes in an attempt to provide a ground connection. To do so creates aInside the station, a common ground bus consisting of a copper pipe of at least 25 mmAn alternative station ground bus may consist of a wideDo not make ground connections from one electrical device to another, and thence to theSee the drawings below for examples of properIf your coaxial cable does not connect directly to theAntenna Considerations. The antenna systems connected to your FT-897 transceiver are, of course, criticallyThe FT-897 is designed for use withTwo antenna jacks are provided on the rear panel of the FT-897.Vertex Standard Co., Ltd.Guidelines for successful base and mobile station installations are shown below. Mobile Antenna Installations. Mobile antennas for the HF bands, with the possible exception of those designed for 28. MHz, display very high “Q” due to the fact that they must be physically shortened, thenAdditional system bandwidth may be realized using the. Yaesu FC-30 Automatic Antenna Tuner, which will present a 50.On the VHF and UHF bands, coaxial line losses increase so rapidly in the presence of. SWR that we recommend that all impedance matching to 50.Base Station Antenna Installations. When installing a “balanced” antenna such as a Yagi or dipole, remember that the FT897 is designed for use with an (unbalanced) coaxial feedline. Always use a balun orUse high-quality 50? coaxial cable for the lead-in to your FT-897 transceiver.

5-mm 3-pin jack accepts external ALC (Automatic Level Control) voltageThe main shaft isThis 3.5-mm, 3-pin jack is used for connection to a CW keyer paddle or a straightThis 3.5-mm, 2-pin jack provides variable audio output for an external speaker. TheIn the default transceiver, there are vacant slots and covered these by the plasticWhen install the optional FNB-78 Ni-MH battery pack to the radio, connect theTop Panel SwitchSelect the battery pack to be used, when install the two optional FNB-78 Ni-MHBottom Panel ConnectorThis 3.5-mm 2-pin jack is used for connection to an analog meter (Vertex StandardOperation. RF Says: Hi! I’m R.F. Radio, and I’m here to guide you through the fine points of theI know your anxious to get on the air, but I encourageTurning the Transceiver On and OffR. F. Says: When you are operate the FT-897 with the optional FP-30 External powerOperating Band Selection. This transceiver covers an incredibly wide frequency range, over which a number ofTherefore, this transceiver’s frequency coverage hasYou can change the channel steps and operating mode onceTo change the frequency band, press either the BAND(DWN) or BAND(UP) key to moveR.F. Says: VFOa and VFOb are independent VFOs, so they may be set to differentAdjusting the RF Gain and SquelchIf your transceiver is configured for “RF Gain” use, rotating this control fully clockwise. To reduce the receiver’s RF. Gain somewhat, rotate this control counter-clockwise slightly. You will observe anIf this control is configured for “SQL” operation, the FT-897’s RF Gain will be set forThe LED just above the. Main Dial will glow Green when the squelch is opened by an incoming signal or noise. R. F. Says: Battery consumption is significantly reduced if the receiver is squelched, asSetting the Operating FrequencyThis can be particularly helpful on the VHF and UHFR. F. Says: The main DIAL synthesizer’s tuning rate (the number of steps per rotation of.

See page forStacked VFO SystemThe operating mode will beReceiver Accessories. Locking Front Panel ControlsIn the transceiver’s default configuration, pressing the LOCK button disables just the. DIAL, while the other keys and switches are unaffected.DIAL: Locks DIAL knob only. FREQ.: Locks front panel keys and knobs related to frequency control (such as. PANEL: Locks all front panel keys and knobs (except POWER and LOCK keys). ALL: Locks all front panel keys and knobs (except POWER and LOCK keys) andWhen the controls are locked out, press the LOCK button once more to release them toClarifier (Receiver Incremental Tuning)To achieve a wider offset than this, you may use theSimilarly, when the receiving frequencyR. F. Says: 1) If you leave the Clarifier on, moving the DIAL will not cause the offset toSHIFT’s current position.This allows you to set up a higher or lower listening pitch, if you prefer such asAGC (Automatic Gain Control). The receiver recovery time constant of the AGC system may be modified to match yourAGC voltage) will cease to function. Noise Blanker. The IF Noise Blanker may be useful in reducing or eliminating some types of impulseThe IPO feature bypasses the receiver RF preamplifier, thereby eliminating theRule of thumb: soIPO (Intercept Point Optimization). The IPO feature bypasses the receiver RF preamplifier, thereby eliminating theATT (Front End Attenuator). The Attenuator will reduce all signals (and noise) by 10 dB, and it may be used to makeThis feature is not availableDSP Bandpass Filter. In the SSB mode, the receiver’s selectivity may be enhanced via the DSP Bandpass. Filter. The bandwidth of the DSP filter may be modified per the procedure below.Bandpass Filter.Bandpass Filter.DSP CW Peaking FilterThe center frequency of the DSP CW PEAKING FILTER is automatically aligned to beTo change the bandwidth of the DSP CW PEAKING FILTER:The available values are 60 Hz,DSP Noise Reduction (NR).

Note that some amplifiers, particularly VHF or UHF “brick” amplifiers, offer two. Be sure to configure your amplifier so that it switches via a closure to ground, asAlternatively, many of these amplifiers use “RF Sensing” toIf you plan onImportant Note! Do not exceed the maximum voltage or current ratings for the ACC jack. This jack is notAll commonly-available keyer paddles should work perfectly with the built-in Electronic. Keyer. The wiring configuration for the paddle is shown below. For straight-key operation, only the tip and shaft connections are used. Note: Even when using a straight key, you must use a three-conductor (“stereo”) plug. IfWhen using an external electronic keyer, be absolutely certain that it is configured forFor CW automated keying using a personal computer, with an external memory keyerReceiver Accessories (Tape Recorder etc.). Connection of a tape recorder or other such receiver accessory is easily accomplished byAdjusting the Front Feet. The two front feet of the transceiver allow the transceiver to be tilted upward for betterThe Liquid Crystal Display (LCD) provides indication of the operating frequencyThese three keys select many of the most important operating features of theThe available features are shown in chart below.Memory Bank) register.Normally, this key is No Action.Monitor. Spectrum Scope Monitor.Small Character modes. Tuning Antenna System.Intercept Point Optimization for improved overload characteristics while operate onMHz band.When the optional filter is not installed on the“OPF1” slot, this key function isWhen the optional filter is not installed on the“OPF2” slot, this key function isConnect the supplied MH-31 Hand Microphone to this jack.Press and hold in the PWR switch for one second to turn to the transceiver on or off.Press this key momentarily to enable the changing of the function of the Multi. Press and hold this key for one second to activate the “Menu” mode.

Pressing this key locks the front panel keys so as to prevent accidental frequencyIt is used both for frequency tuningIn the other versions, its default setting is set toThe (inner) VOL knob adjusts the receiver audio volume level presented to theClockwise rotation increases the volume level. Pressing this key activates the Receiver Clarifier feature. When this feature isPress and hold this key for one second to activate the IF Shift feature, which allowsThis detented rotary switch is used for VFO frequency tuning, memory selection. This rotary switch is also used for adjust the center frequency of the IF filter’sPressing this button momentarily provides instant access to Multi Function Row “p”Pressing this key momentarily recalls a favorite “HOME” frequency memory. Pressing this key switches frequency control between the VFO and Memory. Systems. Pressing either of these keys momentarily will change the operating mode. ThePressing either of these keys momentarily will cause the frequency to be moved upThe selections available are:This indicator glows green when the DSP feature is activated by pressing the DSPThis indicator glows green when the squelch opens, and turns red during transmit.This indicator glows green when the CW Training feature is activated via the MenuThese LEDs indicate the battery status for the optional FNB-78 Ni-MH battery packThe LED glows orange when the battery pack is waiting (switch to off by the A-BRear Panel ConnectorsThis is the DC power supply connection for the transceiver, used when operating theUse the supplied DC cable to connectFor best performance and safety, this Ground lug may be connected to a good earthThis 8-pin mini-DIN jack is used for connection to the FC-30 External Automatic. Antenna Tuner or ATAS-120 Active-Tuning Antenna System. It is also used forThis 6-pin, mini-DIN jack accepts AFSK input from a Terminal Node ControllerSquelch Status, and ground lines.This 3.

The NOISE REDUCTION feature of the DSP system may be used to enhance signal-to-noiseREDUCTION level.GAIN) control in a counter-clockwise direction so as to set the (fixed) S-meter reading atThis adjustment raises the AGC threshold of theDSP Notch Filter. The DSP system’s Notch Filter may be helpful in removing one or more offending carrierYou will notice that the audio level of theIn the AM and FM modes, the DIAL knob is locked out (via the setting of Menu Mode. To adjust the. If you wish to enable the DIAL for tuning in the AM and FM modes, change the setting of. See page for details. R. F. Says: The “channelized” mode of tuning on AM and FM automatically rounds offThis eliminates the inconvenience of having to preset theAutomatic Power-Off Feature. The APO feature helps conserve battery life by automatically turning the transceiver offOff.” The default condition for the APO is OFF, and here is the procedure for activatingOnce you have programmed a time interval, the APO countdown timer will startWhen the APO is activated, the “TIMER” icon will appear at the center top on the LCD. If there is no action by you within the time interval programmed, the microprocessor willJust press and hold in the PWR switch for one second to turn the transceiver back onTransmitter OperationThe ideal audio input level to the transmitter fromR. F. Says: 1) The AM carrier level is preset to 25 Watts during alignment at the factory,It is important to remember that AMSetting this switch to the “2” position will roll offVOX OperationWhen you start speaking, the transmitter should be activated automatically. WhenTo adjust the VOX Gain:The default delay is one second. To setR. F. Says: The delay time for return to the receive mode is set independently on CW. AF Speech Processor Operation. The AF Speech Processor increases your average power output while operating on SSBR. F. Says: Excessive advancement of the Compression Level may lead to distortion.

Each operator’s voice pattern is different, so try several settings to find the one which isDSP Microphone Equalizer. In the SSB, AM, and FM transmission modes, you may use the DSP system to changeTo set up the DSP Microphone Equalizer feature;OFF: Microphone Equalization Off. LPF: High Cut (lower frequencies are emphasized). HPF: Low Cut (higher frequencies are emphasized)CW Transmission. When using a straight key, an external electronic keyer, or a computer-generated keyingR. F. Says. The “CW” mode utilizes USB-side carrier injection, while the CWRTo adjust the CW hangThis is a “hot key” feature which will instantlyHowever, theNow, pressing the key will cause the CW sidetone to beTo adjust the CW sidetone pitch:R. F. Says. Because the CW Pitch corresponds to the actual pitch of yourJust tune theThe FT-897 can generate a “CW Spot” tone; just press and hold in the HOME key forOperation using Built-in Electronic Keyer. The built-in Electronic Keyer provides a convenient method of generating CW. The. Electronic Keyer includes weight and speed adjustments.To adjust the Keyer speed:The “cpm” selection is basedTo adjust the. Dot:Dash weighting ratio:FM TransmissionThe procedure is similar to that used on SSB:From Multi Function Row. Repeater OperationIn this situation, you will. The transmitter frequency will be shiftedTo change the repeater shifts:CTCSS tone encoder. In this situation, you will observe the “T” indicator on theTo change the repeater access tone:You will observe that theThis feature automatically activates the appropriateFM repeater sub-bands in your country. If you wish to change the settings for theR. F. Says. If your local repeaters need a 1750-Hz burst tone for access (typically in. Tone Search Scanning. In operating situations where you don’t know the CTCSS tone being used by anotherTo scan for the CTCSS tone in use:DCS Operation. Another form of tone access control is Digital Code Squelch, or DCS.

It is a newer, moreThe receiver will remain muted until a matching. DCS code is received on an incoming signal.DCS Search Scanning. In operating situations where you don’t know the DCS code being used by anotherTo scan for the DCS code in use:Split Tone Operation. The FT-897 can be operated in a Split Tone configuration via the Menu mode.ARTSTM (Auto Range Transpond System) Operation. This can be especially valuableARTS Alert Beep Options. The ARTS feature allows two kinds of alert beeps (with the additional option of turningDepending on yourThe choices are:To set the ARTS Beep mode;CW Identifier Setup. The ARTS feature includes a CW identifier, as discussed previously. Every ten minutesHere’s how to program the CW Identifier:Digital Mode Operation (SSB-Based AFSK). The FT-897 provides extensive capability for digital mode operation on the HF, VHF, and. UHF bands. The use of AFSK (Audio Frequency-Shifted Keying) configurations allows aThe Menu provides forBefore beginning Digital operation, you need to define which Digital mode will be. Digital mode):RTTY (Radio TeleType) Operation. The “RTTY” mode on the FT-897 is based on LSB-side carrier injection, in accordanceIf you need USB-side injection for your application,Be certain to use the “TX Audio” line from your. TNC, not an “FSK Key” line, for the transmit-data connection.You should now be able to tune around the band,If not, rotate the DIAL knob to adjust the AFSK levelYou are now ready for RTTY operation. R. F. Says: Because RTTY is a continuous-duty transmission mode, try to keep yourPSK31 Operation. Two dedicated PSK31 modes are available, one each for USB-side and LSB-side injection. For BPSK work, the injection does not matter, but for QPSK the two working stationsConnect the FT-897 to your computer’s sound card or interface. Setup for PSK31 operation is basically identical to that previously described for RTTYAs with RTTY, Menu.

And the YF-122C 500 Hz filter mayAlso provided in the FT-897 are two convenient “USER” Digital modes, one eachHere is an example involving the configuration of the USER mode for RTTY with USBside injection (as opposed to LSB injection, used in the default “RTTY” mode):Once in theFor typical high-frequency tone use, a setting of aboutRemember toR. F. Says: The USER-L and USER-U Digital modes should allow you to operate on any. SSB-based AFSK Digital mode. Note that the “PSK31” configurations will also workThe FT-897 is designed for operation on either 1200 bps or 9600 bps packet, and setup isA separate Data inputThe RX-Data output lines are fixed-levelIf you are operating on 1200 bps, try nowUse your terminalR. F. Says: The 9600 bps Packet deviation setting is very critical to successful operation,WeatherFax Monitoring. Monitoring of HF WeatherFax broadcasts is easily accomplished using the FT-897.WeatherFax station assigned to 8.682.0 MHz, tune to 8.680.1 MHz.The audio level from the DATA jack on theFine adjustments in the gray-scale and the frame alignment are accomplished using theSplit Frequency Operation. This transceiver provides convenient split-frequency operation, using the VFO-A and. VFO-B, for DX working and other operating situations requiring unique split frequencyThe example below will describe a typical split-frequency DX situation on the 20-meterVFO-A frequency, and will receive using the VFO-B frequency. The “parenthesis”Time-Out Timer. Most often used on FM, the transmitter’s Time-Out Timer (TOT) feature disables theThis feature may be useful inTo activate the Time-Out Timer:Active-Tuning Antenna System (ATAS-120) Operation. The optional ATAS-120 Active-Tuning Antenna System provides operation on a numberBefore operation can begin, you must instruct the FT-897’s microprocessor that the. ATAS-120 is being used. This is done using the Menu Mode:MHz antenna port.

If you are just using the ATAS-120 on HF band only, with aAutomatic TuningThe “parenthesis” will appearInstead, in the receive mode,When the ATAS-120Manual Tuning. In some instances, the SWR may be slightly improved by manual adjustment of theWith the transceiver in the. While you hold in one of these keys, the FT-897When this is reached, release the. R. F. Says: 1) Once automatic matching has been successfully accomplished, you mustReplace theTo refresh the setting of the ATAS-120, press. You may then restart automaticATAS-120 Operating Tips. The information below will help you derive the best performance possible from the. ATAS-120 Active-Tuning Antenna System. It is critically important that you establish a good mechanical and RF ground connectionMobile mounts which are boltedHowever, magnetic mounts do not provide the RF grounding necessary for goodTuning Procedure. The feedpoint impedance of the ATAS-120 (resistance and reactance) will necessarilyOccasionally, the transceiver’sTo resolve this situation, the transceiver will then command the ATAS-120 to retractIn this instance, the. If this happens. The transceiver will remain in the receiveThereafter, the transmitter will beThe command which retracts the ATAS-120 to its minimum height utilizes a fixed timer. If the ATAS-120 reaches its minimum height before the timer has expired, you mayExternal Wattmeters. If you wish to use an external wattmeter in conjunction with the transceiver and your. ATAS-120, please check the wattmeter with an Ohmmeter prior to installation. Be sureSome wattmeters use a coil or other deviceAlthough the ATAS-120 is not specified for operation on the above bands, and optimumOperation of the ATAS-120FC-30 Automatic Antenna Tuner Operation. The optional FC-30 Automatic Antenna Tuner provides automatic tuning of a coaxialBefore operation can begin, you must instruct the FT-897’s microprocessor that the FC30 is being used.