Yaesu FT-857 User Manual

OPERATING MANUAL

VERTEX STANDARD CO., LTD.

4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan

VERTEX STANDARD

US Headquarters

10900 Walker Street, Cypress, CA 90630, U.S.A.

International Division

8350 N.W. 52nd Terrace, Suite 201, Miami, FL 33166, 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.

VERTEX STANDARD HK LTD.

Unit 5, 20/F., Seaview Centre, 139-141 Hoi Bun Road, Kwun Tong, Kowloon, Hong Kong

Contents

Introduction .....................................................................	1
Specifications ...................................................................	2
Accessories & Options ...................................................	4
Installation .......................................................................	5
Preliminary Inspection .................................................	5
Installation Tips ...........................................................	5
Safety Information .......................................................	6
Installing the Microphone and Front Panel ................	7
Power connections .......................................................	8
Grounding ..................................................................	10
Mobile Station Grounding ....................................	10
Base Station Earth Grounding ..............................	11
Antenna Considerations ............................................	12
Mobile Antenna Installations ...............................	12
Base Station Antenna Installations ......................	13
RF Field Exposure .....................................................	14
Electromagnetic Compatibility ..................................	15
Heat and Ventilation ..................................................	15
Linear Amplifier Interfacing ......................................	16
CW Key/Keyer Connections .....................................	17
Receiver Accessories (Tape Recorder etc.) .............	18
Adjusting the Front Feet ............................................	18
Front Panel Control & Switches .................................	20
Multi Function Key Detail .........................................	24
Rear panel Connectors ................................................	32
Operation .......................................................................	34
Turning the Transceiver On and Off .........................	34
Operating Band Selection ..........................................	34
Mode Selection ..........................................................	34
Adjusting the Audio Volume Level ..........................	35
Menu Quick Start ......................................................	35
Adjusting the RF Gain and Squelch ..........................	36
Setting the Operating Frequency ...............................	36
Changing the Dial Speed ...........................................	37
Stacked VFO System ................................................	37
Receiver Accessories ....................................................	38
Locking Front Panel Controls ...................................	38
Clarifier ......................................................................	39
IF Shift .......................................................................	40
AGC ...........................................................................	41
Noise Blanker ............................................................	41
IPO .............................................................................	42
ATT (Front End Attenuator) .....................................	42
DSP Bandpass Filter (DBP) ......................................	43
DSP CW Peaking Filter (DBF) .................................	44
DSP Noise Reduction (DNR) ...................................	44
DSP Notch Filter (DNF) ...........................................	45
AM/FM Tuning Dial Operation ................................	45
Automatic Power-Off Feature ...................................	46
Transmitter Operation ................................................	48
SSB/AM Transmission ..............................................	48
Basic Setup/Operation ..........................................	48
VOX Operation ....................................................	49
AF Speech Processor Operation ..........................	50
DSP Microphone Equalizer .................................	51
CW Transmission ......................................................	52
OperationusingStraightKey/ExternalKeying ..Device 52
Using the Built-in Electronic Keyer .....................	54
FM Transmission .......................................................	56
Basic Setup/Operation ..........................................	56
Repeater Operation ..............................................	57
Tone Search Scanning ..........................................	58

DCS Operation .....................................................	59
DCS Search Scanning ..........................................	59
Split Tone Operation ............................................	60
ARTSTM Operation ...............................................	61
CW Identifier Setup ........................................	62
Digital Mode Operation (SSB-Based AFSK) ..........	63
RTTY (Radio Tele Type) Operation ...................	63
PSK31 Operation ..................................................	64
“User” Defined Digital Modes ............................	64
Packet (1200/9600 bps FM) Operation ....................	65
WeatherFax Monitoring ............................................	66
Time-Out Timer .........................................................	67
Split Frequency Operation ........................................	67
ATAS-100/-120 Operation .......................................	68
Automatic Tuning .................................................	68
Manual Tuning ......................................................	69
ATAS-100/-120 Operating Tips ..........................	70
FC-30 Automatic Antenna Tuner Operation ............	71
Antenna Tuner Memory System ..........................	72
Memory Operation .......................................................	73
QMB (Quick Memory Bank) Channels ...................	73
Memory Operation on “Regular” Memory Channel ........	74
Normal Memory Storage .....................................	74
Split-Frequency Memory Storage ........................	75
Memory Channel Recall ......................................	76
Masking (“Hiding”) a Memory ............................	77
Memory Operation on “HOME” Channel Memories .......	78
Labeling Memories after Programming Channel Data .....	79
Spectrum Scope Monitor .............................................	80
Smart SearchTM ............................................................	81
Scanning Operation ......................................................	82
Scanning Features ......................................................	82
Scanning Operation ...................................................	82
Scan-Resume Choices ..........................................	83
Scan Skip Programming (Memory Mode only) ..	83
“Priority Channel” Scanning .....................................	85
Programmable Memory Scan (PMS) Operation ......	86
Dual Watch Operation ...............................................	87
Miscellaneous Settings .................................................	88
Operation on Alaska Emergency Frequency: 5167.5 kHz ... 88
CW Training Feature .................................................	89
Programming the Panel Key Functions .....................	89
Beacon Feature ..........................................................	90
Beacon Text Storage ............................................	90
Beacon Text Sending (On the Air) ......................	91
Display Customization ..............................................	92
Display Lamp Mode .............................................	92
Display Contrast ...................................................	92
Display Dimmer ...................................................	92
Display Color .......................................................	93
Menu Operation ...........................................................	94
CAT (Computer Aided Transceiver) Operation . 113
Power-On Microprocessor Reset Procedures ........	117
Cloning .........................................................................	118
Installation Optional Accessories .............................	119
Optional Digital Signal Processing Unit DSP-2 ............	119
Optional Filters:YF-122S, YF-122C, and YF-122CN ....	120
Optional High Stability Reference Oscillator TCXO-9 ..	121
Appendix ......................................................................	122
Setup of Memories
for Low Earth Orbit (LEO) FM Satellite Operation .......	122
MH-59A8J Remote Microphone ..............................	125

INTRODUCTION

AF	QL
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SELECT

HOME

CLAR

FUNC

The FT-857 is a rugged, innovative multiband, multimode mobile/portable transceiver for the amateur radio MF/HF/VHF/UHF bands. Providing coverage of the 160-10 meter bands plus the 6 m, 2 m, and 70 cm bands, the FT-857 includes operation on the SSB, CW, AM, FM, and Digital modes, yielding the most comprehensive performance package available for mobile and field operation.

Engineered for high performance, the FT-857 provides 100 watts power output on the 160 through 6 meter bands, 50 watts power output on 2 meters, and 20 watts output on 70 centimeters.

The multi-function Liquid-Crystal Display includes attractive backlighting (32 colors available!). The display includes bar-graph indication of power output, ALC voltage, SWR, modulation level, and/or signal strength. Also included are a number of operating status icons, as well as the function displays for the three operating function keys ([A], [B], and [C]).

Among the advanced features of the FT-857 are many incorporated only in large basestation transceivers. These include Dual VFOs; Split-Frequency operation; Digital Signal Processing (Bandpass Filtering, Noise Reduction, Auto-Notch, and Microphone Equalizer); IF Shift; Clarifier (“R.I.T.”); IF Noise Blanker; AGC Fast/Slow/Auto/Off selection; RF Gain and Squelch control; IPO (Intercept Point Optimization) and a receiver front-end Attenuator; AM Aircraft reception; AM and FM Broadcast reception; U.S. Weather Band reception; VOX; Built-in Electronic Keyer with Memories and a Beacon mode; Adjustable CW Pitch; Automatic FM Repeater Shift (ARS); Built-in CTCSS Encoder/Decoders; ARTS™ (AutoRange Transponder System); Smart Search™ Automatic Memory Loading System; Spectrum Scope; 200 Memories plus Home Channels and Band-limiting Memories; Alpha-Nu- meric Labeling of Memories; 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 the amazing capability of the exciting new FT-857 Transceiver.

FT-857 Operating Manual

1

SPECIFICATIONS

General

Frequency Range:	Receive:	0.1-56 MHz, 76-108 MHz, 118-164 MHz,
		420-470 MHz
	Transmit:	160 - 6 Meters, 2 Meters,
		70 Centimeters (Amateur bands only)
Emission Modes:	A1 (CW), A3 (AM), A3J (LSB/USB), F3 (FM),
	F1 (9600 bps packet), F2 (1200 bps packet)
Synthesizer Steps (Min.):	10 Hz (CW/SSB), 100 Hz (AM/FM/WFM)
Antenna Impedance:	50 Ohms, Unbalanced
Operating Temp. Range:	14 ºF to 140 ºF (–10 °C to +60 °C)
Frequency Stability:	±4 ppm from 1 min. to 60 min after power on.
	@25 °C: 1 ppm/hour
	±0.5 ppm/1 hour @25 °C, after warmup
	(with optional TCXO-9)
Supply Voltage:	Normal: 13.8 VDC ±15 %, Negative Ground
Current Consumption:	Squelched: 550 mA (Approx.)
	Receive: 1 A
	Transmit: 22 A
Case Size (W x H x D):	6.1” x 2.0” x 9.2” (155 x 52 x 233 mm)
Weight (Approx.):	4.6 lb. (2.1 kg)

Transmitter

RF Power Output:		SSB/CW/FM	AM Carrier
(@13.8 V DC)	160- 6 M:	100 W	25 W
	2 M:	50 W	12.5 W
	70 CM:	20 W	5 W
Modulation Types:	SSB: Balanced Modulator,
	AM: Early Stage (Low Level),
	FM: Variable Reactance
FM Maximum Deviation:	±5 kHz (FM-N: ±2.5 kHz)
Spurious Radiation:	–50 dB (1.8-29.7 MHz)
	–60 dB (50/144/430 MHz)
Carrier Suppression:	>40 dB
Opp. Sideband Suppression: >50 dB
SSB Frequency Response:	400 Hz-2600 Hz (–6 dB)
Microphone Impedance:	200-10k Ohms (Nominal: 600 Ohms)

2	FT-857 Operating Manual

		SPECIFICATIONS
Receiver
Circuit Type:	Double-Conversion Superheterodyne (SSB/CW/AM/FM)
	Superheterodyne (WFM)
Intermediate Frequencies:	1st: 68.33 MHz (SSB/CW/AM/FM); 10.7 MHz (WFM)
	2nd: 455 kHz
Sensitivity:		SSB/CW	AM	FM
	100 kHz-1.8 MHz	–	32 µV	–
	1.8 MHz-28 MHz	0.2 µV	2 µV	–
	28 MHz-30 MHz	0.2 µV	2 µV	0.5 µV
	50 MHz-54 MHz	0.125 µV	1 µV	0.2 µV
	144/430 MHz	0.125 µV	–	0.2 µV
	(SSB/CW/AM = 10 dB S/N, FM = 12 dB SINAD)
Squelch Sensitivity:		SSB/CW/AM	FM
	100 kHz-1.8 MHz	–	–
	1.8 MHz-28 MHz	2.5 µV	–
	28 MHz-30 MHz	2.5 µV	0.32 µV
	50 MHz-54 MHz	1 µV	0.16 µV
	144/430 MHz	0.5 µV	0.16 µV
Image Rejection:	HF/50 MHz: 70 dB,
	144/430 MHz: 60 dB
IF Rejection:	60 dB
Selectivity (–6/–60 dB):	SSB/CW: 2.2 kHz/4.5 kHz
	AM: 6 kHz/20 kHz
	FM: 15 kHz/30 kHz
	FM-N: 9 kHz/25 kHz
	SSB (optional YF-122S installed): 2.3 kHz/4.7 kHz (–66 dB)
	CW (option YF-122C installed): 500 Hz/2.0 kHz
	CW (option YF-122CN installed): 300 Hz/1.0 kHz
AF Output:	2.5 W (@4 Ohms, 10% THD or less)
AF Output Impedance:	4-16 Ohms

Specifications are subject to change without notice, and are guaranteed within the amateur bands only.

FT-857 Operating Manual

3

ACCESSORIES & OPTIONS
	S UPPLIED A CCESSORIES
Hand Microphone MH-31A8J ...............................................................................................		1
Mobile Mounting Bracket MMB-82 ....................................................................................		1
DC Power Cord	.....................................................................................................................	1
Operating Manual .................................................................................................................		1
Warranty Card .......................................................................................................................		1
	A VAILABLE O PTIONS
FP-1030A	External AC Power Supply (25A)
DSP-2	Digital Signal Processing Unit
YF-122S	Collins SSB Filter (2.3 kHz/4.7 kHz: –6 dB/–66 dB)
YF-122C	Collins CW Filter (500 Hz/2 kHz: –6 dB/–60 dB)
YF-122CN	Collins CW Filter (300 Hz/1 kHz: –6 dB/–60 dB)
TCXO-9	TCXO Unit (±0.5 ppm)
MD-200A8X	Desktop Microphone
MH-36E8J	DTMF Microphone
MH-59A8J	Remote Control Microphone
YSK-857	Separation Kit
FC-30	External Automatic Antenna Tuner
ATAS-100	Active - Tuning Antenna System
ATAS-120	Active - Tuning Antenna System
ATBK-100	VHF/UHF Antenna Base/Counterpoise Kit
VL-1000	Solid - State Linear Amplifier
CT-62	CAT Interface Cable
CT-39A	Packet Cable
CT-58	BAND DATA Cable

4	FT-857 Operating Manual

INSTALLATION

This chapter describes the installation procedure for integrating the FT-857 into a typical amateur radio station. It is presumed that you possess technical knowledge and conceptual understanding consistent with your status as a licensed radio amateur. Please take some extra time to make certain that the important safety and technical requirements detailed in this chapter are followed closely.

PRELIMINARY INSPECTION

Inspect the transceiver visually immediately upon opening the packing carton. Confirm that all controls and switches work freely, and inspect the cabinet for any damage. Gently shake the transceiver to verify that no internal components have been shaken loose due to rough handling during shipping.

If any evidence of damage is discovered, document it thoroughly and contact the shipping company (or your local dealer, if the unit was purchased over-the-counter) so as to get instructions regarding the prompt resolution of the damage situation. Be certain to save the shipping carton, especially if there are any punctures or other evidence of damage incurred during shipping; if it is necessary to return the unit for service or replacement, use the original packing materials but put the entire package inside another packing carton, so as to preserve the evidence of shipping damage for insurance purposes.

INSTALLATION TIPS

To ensure long life of the components, be certain to provide adequate ventilation around the cabinet of the FT-857.

Do not install the transceiver on top of another heat-generating device (such as a power supply or amplifier), and do not place equipment, books, or papers on top of the FT-857. Avoid heating vents and window locations that could expose the transceiver to excessive direct sunlight, especially in hot climates. The FT-857 should not be used in an environment where the ambient temperature exceeds 140º F (+60 °C).

FT-857 Operating Manual

5

INSTALLATION

SAFETY INFORMATION

The FT-857 is an electrical apparatus, as well as a generator of RF (Radio Frequency) energy, and you should exercise all safety precautions as are appropriate for this type of device. These safety tips apply to any device installed in a well-designed amateur radio station.

Never allow unsupervised children to play in the vicinity of your transceiver or antenna installation.

Be certain to wrap any wire or cable splices thoroughly with insulating electrical tape, to prevent short circuits.

Do not route cables or wires through door jambs or other locations where, through wear and tear, they may become frayed and shorted to ground or to each other.

Do not stand in front of a directional antenna while you are transmitting into that antenna. Do not install a directional antenna in any location where humans or pets

may be walking in the main directional lobe of the antenna’s radiation pattern.

In mobile installations, it is preferable to mount your antenna on top of the roof of the vehicle, if feasible, so as to utilize the car body as a counterpoise for the antenna and

raise the radiation pattern as far away from passengers as possible.

During vehicular operation when stopped (in a parking lot, for example), make it a practice to switch to Low power if there are people walking nearby.

Never wear dual-earmuff headphones while driving a vehicle.

Do not attempt to drive your vehicle while making a telephone call on an autopatch

using the DTMF microphone. Pull over to the side of the road, whether dialing manually.

6	FT-857 Operating Manual

INSTALLATION

INSTALLING THE MICROPHONE AND FRONT PANEL

1.Insert the microphone’s plug into the recessed jack on the transceiver, as shown in the illustration.

2.You may position the microphone cable so as to cause it to exit from the side or the bottom of the transceiver. Just route the cable into the appropriate channel provided, as shown in the illustration.

3.Connect the Control cable between the Front Panel and Transceiver Body.

4.Install the Front Panel by sliding it into the position shown; you will hear a “click” when the panel locks into place.

5.To remove the Front Panel, use your left thumb to push rearward (slightly) the latch on the left-hand of the panel, then slide the Front Panel to the right and away from the transceiver.

DSP

MODE

TX/BUSY	DWN	UP
		BAND

FT-857 Operating Manual

7

INSTALLATION

POWER CONNECTIONS

The DC power connector for the FT-857 must only be connected to a DC source providing 13.8 Volts DC (±15%), and capable of at least 22 Amperes of current. Always observe proper polarity when making DC connections:

The Red DC power lead connects to the Positive (+) DC terminal; and the Black DC power lead connects to the Negative (–) DC terminal.

In mobile installations, noise pickup may be minimized by connecting the DC cable directly to your vehicle’s battery, rather than to the ignition switch or “accessory” circuitry. Direct connection to the battery also provides the best voltage stability.

HF/50MHzAntenna	144MHz/430MHzAntenna
To	To

HF/50MHzAntenna	144MHz/430MHzAntenna
To	To

Supplied DC Cable

Cigarette Lighter Plug

Fuse Box

12V Battery

FUSE: 25A

RED BLACK

FP-1030A

0	5	10	15	20	0	5	20	30	40
		V				A			O V E R L O A D

CONTINUOUS CURRENT 25A

POWER

ON

OFF

FUSE: 25A	BLACK
RED

Supplied DC Cable

8	FT-857 Operating Manual

INSTALLATION

POWER CONNECTIONS

Tips for Successful Mobile Installations:

rBefore connecting the DC cable to the battery, measure the voltage across the battery terminals with the engine running fast enough to show a charge. If the voltage is above 15 Volts, the vehicle’s voltage regulator should be adjusted to reduce the charging voltage to 14 Volts or lower.

rRoute the DC cable as far away from the ignition cables as possible.

rIf the DC cable is not long enough, use #12 AWG (minimum) stranded, insulated wire to extend it. Be certain to solder the connections at the splice securely, and provide ample insulation for the soldered splice (heat shrink tubing plus black electrical tape work well).

rCheck the battery terminal connections frequently to be sure they are tight and not corroded.

rWhen operating with the vehicle turned off, or operating from a stand-alone car battery (in a camp site, etc.), be mindful of the minimum operating voltage (11.73 Volts) for the FT-857. If the battery is not charged sufficiently to maintain at least 11¾ Volts at the radio, erratic operation or shut-down may occur.

Caution

Permanent damage can result if improper supply voltage, or reverse-polarity voltage, is applied to the FT-857. The Limited Warranty on this transceiver does not cover damage caused by application of AC voltage, reversed polarity DC, or DC voltage outside the specified range of 13.8V ±15%. Never attempt to connect the FT-857 to a 24-Volt battery system.

When replacing fuses, be certain to use a fuse of the proper rating. The FT-857 requires a 25A fast-blow fuse.

MMB-82 Installation

FT-857 Operating Manual

9

INSTALLATION

GROUNDING

The provision of an effective ground system is important in any successful communications station. A good ground system can contribute to station efficiency in a number of ways:

rIt can minimize the possibility of electrical shock to the operator.

rIt can minimize RF currents flowing on the shield of the coaxial cable and the chassis of the transceiver which may cause interference to nearby home entertainment devices or laboratory test equipment.

rIt can minimize the possibility of erratic transceiver operation caused by RF feedback or improper current flow through logic devices.

An effective earth ground system may take several forms; for a more complete discussion, see an appropriate RF engineering text. The information presented below is intended only as a guideline.

Inspect the ground system – inside the station as well as outside – on a regular basis so as to ensure maximum performance and safety.

Mobile Station Grounding

Although satisfactory grounding in most installations will be achieved via the DC cable’s negative lead and the antenna system’s coaxial cable shield, it is often recommended that you provide a direct ground connection to the vehicle chassis at the mounting location of the transceiver (installation using the MMB-82 Mounting Bracket will accomplish this, if the MMB-82 itself is mounted to the vehicle’s chassis). Due to unexpected resonances which may naturally occur in any location, improper communication system performance may result from insufficient grounding. These symptoms may include:

rRF feedback (resulting in distortion on your transmitted signal);

rUnintended frequency change;

rBlinking or blanking of the frequency display;

rNoise pickup; and/or

rLoss of memory.

Note that these conditions may occur in any communications installation. The FT-857 includes extensive filtering designed to minimize the chance of such problems; however, random currents set up by insufficient RF grounding can nullify such filtering. Bonding the rear panel Ground lug of the FT-857 transceiver to the vehicle or vessel’s ground system should clear up any such difficulties.

Vertex Standard does not recommend the use of “on glass” mobile antennas unless the shield of the coaxial cable is securely grounded near the feedpoint of the antenna. Such antennas frequently are responsible for the ground-related difficulties described above.

10	FT-857 Operating Manual

INSTALLATION

GROUNDING

Base Station Earth Grounding

Typically, the ground connection consists of one or more copper-clad steel rods, driven into the ground. If multiple ground rods are used, they should be configured in a “V” configuration, and bonded together at the apex of the “V” which is nearest the station location. Use a heavy, braided 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 of reliable service. Use the same type of heavy, braided cable for the connections to the station ground bus (described below).

Do not use gas line pipes in an attempt to provide a ground connection! To do so creates a serious risk of explosion!!

Inside the station, a common ground bus consisting of a copper pipe of at least 1” (25 mm) diameter should be used. An alternative station ground bus may consist of a wide copper plate (single-sided circuit board material is ideal) secured to the bottom of the operating desk. Grounding connections from individual devices such as transceivers, power supplies, and data communications devices should be made directly to the ground bus using a heavy, braided cable.

Do not make ground connections from one electrical device to another, and thence to the ground bus. This so-called “Daisy Chain” grounding technique may nullify any attempt at effective radio frequency grounding. See the drawings below for examples of proper and improper ground connections.

Improper Ground Connection			Proper Ground Connection
Transceiver	Linear	Power	Transceiver	Linear	Power
	Amplifier	Supply		Amplifier	Supply

"Daisy Chain"

FT-857 Operating Manual

11

INSTALLATION

ANTENNA CONSIDERATIONS

The antenna systems connected to your FT-857 transceiver are, of course, critically important in ensuring successful communications. The FT-857 is designed for use with any antenna system providing a 50 W resistive impedance at the desired operating frequency. While minor excursions from the 50 W specification are of no consequence, the power amplifier’s protection circuitry will begin to reduce the power output of there is more than a 50% divergence from the specified impedance (less than 33 W or greater than 75 W, corresponding to a Standing Wave Ratio (SWR) of 1.5:1).

Two antenna jacks are provided on the rear panel of the FT-857. The “HF/50 MHz ANT” jack is used for HF and 50 MHz, while the “144/430 MHz ANT” jack is used for 144 MHz and 430 MHz.

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, then resonated using a loading coil. Additional system bandwidth may be realized using the Yaesu FC-30 Automatic Antenna Tuner, which will present a 50 W impedance to your transceiver on the 1.8 ~ 50 MHz bands so long as the SWR on the coaxial line connected to the FC-30 is below 3:1.

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 W be performed at the antenna feedpoint.

Yaesu’s Active-Tuned Antenna System (ATAS-100/-120) is a unique HF/VHF/UHF mobile antenna system, which provides automatic tuning when used with the FT-857. See page 68 for full details on the ATAS-100/-120.

For VHF/UHF weak-signal (CW/SSB) operation, remember that the antenna polarization standard for these modes is horizontal, not vertical, so you must use a loop or otherwise horizontally-polarized antenna so as to avoid cross-polarization loss of signal strength (which can be 20 dB or more!). On HF, signals propagated via the ionosphere develop mixed polarizations, so antenna selection may be made strictly on mechanical considerations; vertical antennas are almost always utilized on HF for this reason.

In mobile (and portable) installations, when vertical antennas are used, remember that the grounding of the base area of the antenna is critically important to proper operation. Since most HF vertical antennas emulate a quarter-wavelength “monopole” antenna, the “missing half” of the dipole antenna consists of a counterpoise of radial ground system. In a vehicle, if mounting the antenna to a door or hatch, it is recommended that you bond the door to the

12	FT-857 Operating Manual

INSTALLATION

ANTENNA CONSIDERATIONS

rest of the vehicle’s body, using a heavy braid bonded securely at both ends, to ensure that as much counterpoise as possible is secured. In portable operation, be sure to lay out radials (or otherwise construct a n image plane for the vertical monopole); it is not adequate simply to connect a vertical radiating element to the rear panel Antenna jack of this transceiver, without providing a suitable counterpoise.

Base Station Antenna Installations

When installing a “balanced” antenna such as a Yagi or dipole, remember that the FT-857 is designed for use with an (unbalanced) coaxial feedline. Always use a balun or other balancing device so as to ensure proper antenna system performance.

Use high-quality 50 W coaxial cable for the lead-in to your FT-857 transceiver. All efforts at providing an efficient antenna system will be wasted if poor quality, lossy coaxial cable is used. Losses in coaxial lines increase as the frequency increases, so a coaxial line with 0.5 dB of loss at 7 MHz may have 6 dB of loss at 432 MHz (thereby consuming 75% of your transceiver’s power output!). As a general rule, smaller-diameter coaxial cables tend to have higher losses than larger-diameter cables, although the precise differences depend on the cable construction, materials, and the quality of the connectors used with the cable. See the cable manufacturer’s specifications for details.

For reference, the chart below shows approximate loss figures for typicallyavailable coaxial cables frequently used in HF installations.

Loss in dB per 30 m (100 feet) for Selected 50-ohm Coaxial Cables

	CABLE TYPE		LOSS
		1.8 MHZ	28 MHZ	432 MHZ
	RG-58A	0.55	2.60	>10
	RG-58 Foam	0.54	2.00	8.0
	RG-8X	0.39	1.85	7.0
	RG-8A, RG-213	0.27	1.25	5.9
	RG-8 Foam	0.22	0.88	3.7
	Belden 9913	0.18	0.69	2.9
	7/8” “Hardline”	< 0.1	0.25	1.3

Loss figures are approximate; consult cable manufacturer’s catalogs for complete specifications.

Always locate antennas such that they can never come in contact with outdoor power lines in the event of a catastrophic support or power-pole structural failure. Ground your antennas’ support structure(s) adequately, so as to dissipate energy absorbed during a lightning strike. Install appropriate lightning arrestors in the antenna coaxial cables (and rotator cables, if rotary antennas are used).

In the event of an approaching electrical storm, disconnect all antenna lead-in, rotator cables, and power cables completely from your station if the storm is not immediately in your area.

FT-857 Operating Manual

13

INSTALLATION

ANTENNA CONSIDERATIONS

Do not allow disconnected cables to touch the case of your FT-857 transceiver or accessories, as lightning can easily jump from the cable to the circuitry of your transceiver via the case, causing irreparable damage. If a lightning storm is in progress in your immediate area, do not attempt to disconnect the cables, as you could be killed instantly if lightning should strike your antenna structure or a nearby power line.

If a vertical antenna is utilized, be certain that humans and/or pets and farm animals are kept away both from the radiating element (to prevent electrical shock and RF exposure danger) and the ground system (in the event of an electrical storm). The buried radials of a groundmounted vertical antenna can carry lethal voltages outward from the center of the antenna in the event of a direct lightning strike.

RF FIELD EXPOSURE

This transceiver is capable of power output in excess of 50 Watts, so customers in the United States may be required to demonstrate compliance with Federal Communications Commission (FCC) regulations concerning maximum permissible exposure to radio frequency energy. Compliance is based on the actual power output used, feedline loss, antenna type and height, and other factors which can only be evaluated as a system.

Information regarding these regulations may be available from your Dealer, your local radio club, from the FCC directly (press releases and other information can be found on the FCC’s site on the World Wide Web at <http://www.fcc.gov>), or from the American Radio Relay League, Inc. (225 Main St., Newington CT 06111 or <http://www.arrl.org>).

Although there is negligible radio frequency (RF) leakage from the FT-857 transceiver itself, its antenna system should be located as far away from humans and animals as practicable, so as to avoid the possibility of shock due to accidental contact with the antenna or excessive long-term exposure to RF energy. During mobile operation, do not transmit if someone is standing adjacent to your antenna, and use the lowest power possible.

Never stand in front of an antenna (during testing or operation) when RF power is applied, especially in the case of 430 MHz directional arrays. The 20 Watt power output supplied by the FT-857, combined with the directivity of a beam antenna, can cause immediate heating of human or animal tissues, and may cause other undesirable medical effects.

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INSTALLATION

ELECTROMAGNETIC COMPATIBILITY

If this transceiver is used with, or in the vicinity of, a computer or computer-driven accessories, you may need to experiment with grounding and/or Radio Frequency Interference (RFI) suppression devices (such as ferrite cores) to minimize interference to your communications caused by energy from the computer. Computer-generated RFI is usually a result of inadequate shielding of the computer’s cabinet or I/O and peripheral connections. While computer equipment may “comply” with RF emission standards, this does not ensure that sensitive Amateur Radio receivers like the FT-857 will not experience interference from the device!

Be certain to use only shielded cables for TNC-to-Transceiver connections. You may need to install AC line filters on the power cord(s) of the suspected equipment, and decoupling ferrite toroidal chokes may be required on interconnecting patch/data cables. As a last resort, you can try installing additional shielding within the computer’s case, using appropriate conductive mesh or conductive shielding tape. Especially check “RF holes” where plastic is used for cabinet front panels.

For further information, consult amateur radio reference guides and publications relating to RFI suppression techniques.

HEAT AND VENTILATION

To ensure long life of the components, be certain to provide adequate ventilation around the cabinet of the FT-857. The cooling system of the transceiver must be free to draw cool air in from the side of the transceiver and expel warm air from the rear of the transceiver.

Do not install the transceiver on top of another heat-generating device (such as a linear amplifier), and do not place equipment, books, or papers on top 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 sunlight, especially in hot climates.

Heat

Water & Moisture

Dust

Ventilation

FT-857 Operating Manual

15

INSTALLATION

LINEAR AMPLIFIER INTERFACING

The FT-857 provides the switching and drive-control lines required for easy interfacing to most all commonly-available amplifiers sold today.

These include:

rThe Antenna Jacks (“HF/50MHz” and “144/430MHz”);

rA T/R control line (open circuit on RX, closure to ground on TX); and

rA negative-going ALC jack (control voltage range: 0V to –4V DC).

rWhen interfacing to the VL-1000 Solid State 1 KW Linear Amplifier, the optional CT58 Interface Cable provides for easy interconnection (requires that the Menu Mode No020 [CAT/LIN/TUN] setting changes to “LINEAR”).

The rear-panel CAT/LINEAR jack is an 8-pin, miniature DIN type, with the “TX GND” pin providing a closure to ground on transmit, for T/R control of your linear amplifier. The ACC jack is a miniature stereo type, with external ALC input capability on the tip connection. The main shaft is the ground return. The ring connection of the ACC jack, when closed to ground, places the FT-857 into the transmit mode, and sends a steady CW carrier, for amplifier (or antenna tuner) adjustment purposes.

Note that some amplifiers, particularly VHF or UHF “brick” amplifiers, offer two methods of T/R switching: application of +13V or a closure to ground.

Be sure to configure your amplifier so that it switches via a closure to ground, as provided by your FT-857’s CAT/LINEAR jack (“TX GND” pin). Alternatively, many of these amplifiers use “RF Sensing” to control their relays; if yours is in this category, you may then use

	the T/R control line from the “TX GND” pin			MHzAntenna
	of the CAT/LINEAR jack for control of your	Antenna	Antenna
	HF linear amplifier, and RF sensing for your
		To HF	To HF	To 50
	VHF or UHF amplifier.

/ 430 MHz Antenna	ANT 1	ANT 2	ANT 3	VL-1000
144	ANT 1
				REMOTE

To	ON
	OFF
ANT 2	BAND DATA 1

	/LINEAR	CT-58 BAND DATA Cable
	CAT

BAND DATA 2

BAND-DATA 1

CT-58 ALC Cable

		1
		INPUT
	INPUT 1
	PTT 1
	PTT 2
	INPUT 2
	ALC 1
	CONTROL
	ALC 2
	DC48V IN
	GND
ALC 1	GND	DC 48V IN	CONTROL

16	FT-857 Operating Manual

INSTALLATION

LINEAR AMPLIFIER INTERFACING

The “TX GND” T/R control line is a transistor “open collector” circuit, capable of handling positive amplifier relay coil voltages of up to +50V DC and current of up to 400 mA. If you plan on using multiple linear amplifiers for different bands, you must provide external bandswitching of the “TX GND” relay control line from the CAT/LINEAR jack.

Important Note!

Do not exceed the maximum voltage or current ratings for the “TX GND” line at the CAT/LINEAR jack. This line is not compatible with negative DC voltages, nor AC voltages of any magnitude.

Most amplifier control relay systems require only low DC voltage/current switching capability (typically, +12V DC at 25 ~ 75 mA), and the switching transistor in the FT-897 will easily accommodate such amplifiers.

CW KEY/KEYER CONNECTIONS

All commonly-available keyer paddles should work perfectly with the built-in Electronic Keyer. The wiring configuration for the paddle is shown below.

KEY GND

DOT

DASH

DOT COMMON

KEY GND

DASH

COMMON

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. If a two-conductor plug is used, the key line will be constantly shorted to ground.

When using an external electronic keyer, be absolutely certain that it is configured for “positive” keying, not “negative” or “grid block” keying. The “key-up” voltage of the FT-857 is +5V, and the “key-down” current is only about 1 mA.

For CW automated keying using a personal computer, with an external memory keyer providing for manual sending, it usually is possible to connect the keyed lines together via a “Y” connector. Check with the documentation accompanying your keyer and your contest/ DX software for any cautions which need to be observed.

FT-857 Operating Manual

17

INSTALLATION

RECEIVER ACCESSORIES (TAPE RECORDER ETC.)

Connection of a tape recorder or other such receiver accessory is easily accomplished by using the DATA jack’s Data Out (1200 bps) terminal (Pin 5) and Ground (Pin 2). The audio output is fixed at GND

100 mV, with an impedance of 600 W.	DATA

DATA OUT 1200bps

ADJUSTING THE FRONT FEET

The two front feet of the transceiver allow the transceiver to be tilted upward for better viewing. Simply fold both feet forward to raise the front of the transceiver, and fold them back against the bottom case to lower the front of the FT-857.

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INSTALLATION

NOTE

FT-857 Operating Manual

19

FRONT PANEL CONTROL & SWITCHES

AF	QL
	S
	/RF
SELECT

HOME

CLAR

FUNC

AF Knob

The (inner) VOL knob adjusts the receiver audio volume level presented to the internal or external speaker. Clockwise rotation increases the volume level.

SQL/RF Knob

In the USA version, this (outer) SQL/RF knob adjusts the gain of the receiver’s RF and IF stages. Using Menu Mode No-080 [SQL/RF GAIN], this control may be changed to function as a Squelch control, which may be used to silence background noise when no signal is present. In the other versions, its default setting is set to “Squelch.”

SELECT knob

This detented rotary switch is used for VFO frequency tuning, memory selection, and function selection for the [A], [B], [C] keys of the transceiver.

HOME Key

Pressing this key momentarily recalls a favorite “Home” frequency memory.

CLAR Key

Pressing this key activates the Receiver Clarifier feature. When this feature is activated, the SELECT knob is used to set a tuning offset of up to ±9.99 kHz. The transmitter’s frequency is not affected by the setting of the Clarifier.

Press and hold in this key for one second to activate the IF Shift feature, which allows you to use the SELECT knob to adjust the center frequency of the IF filter’s passband response.

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FRONT PANEL CONTROL & SWITCHES

FUNC Key

Press this key momentarily to enable the changing of the function of the Multi Function keys ([A], [B], and [C]) by rotating the SELECT knob.

Press and hold in this key for one second to activate the “Menu” mode.

Multi Function Keys

These three keys select many of the most important operating features of the transceiver. When you press the [FUNC] key, then rotate the SELECT knob, the current function of that key will appear above each of the [A], [B], and [C] keys (along the bottom of the LCD). You may scroll the display through 17 rows of functions available for use via the [A], [B], and [C] keys. The available features are shown in page 24.

MODE(t)/MODE(u) Key

Pressing either of these keys momentarily will change the operating mode. The selec-

tions available are:

..... LSB ó USB ó CW ó CWR ó AM ó FM ó DIG ó PKT ó LSB .....

DSP Button

Pressing this button momentarily provides instant access to Multi Function Row “p” (MFp), which contains the command key for the optional receiver’s Digital Signal Processing system. The available functions will appear as the functions displayed above the [A], [B], and [C] keys, as described previously. Pressing this key once more will return operation to the last-used Multi-Function Row (the one in use before the DSP row was engaged).

Press and hold in this switch for one second to activate Menu Item No-048, for adjustment of the DSP Microphone Equalizer (see page 51 for details).

POWER Switch

Press and hold in the POWER switch for one second to turn to the transceiver on or off. While the transceiver is turned on, pressing this switch momentarily will engage the “Fast Tuning” mode, to allow more rapid frequency navigation (a small “running man” icon will be observed in the bottom right-hand corner of the LCD).

TX/BUSY Indicator

This indicator glows green when the squelch opens, and turns red during transmit. During CW operation, this indicator will glow blue when an incoming signal is tuned to the center of the passband (with IF Shift off). And during FM reception, this indicator will glow blue when a signal is received with a CTCSS/DCS tone matching that to which your transceiver is set.

FT-857 Operating Manual

21

FRONT PANEL CONTROL & SWITCHES

AF	QL
	S
	/RF
SELECT

HOME

CLAR

FUNC

BAND(DWN)/BAND(UP) Key

Pressing either of these keys momentarily will cause the frequency to be moved up or

down by one frequency band. The selections available are:

..... 1.8 MHz ó 3.5 MHz ó 5.0 MHz ó 7.0 MHz ó 10 MHz ó 14 MHz ó

15 MHz ó 18 MHz ó 21 MHzó 24 MHz ó 28 MHz ó 50 MHz ó 88 MHz ó 108 MHz ó 144 MHz ó 430 MHz ó 1.8 MHz .....

V/M Key

Pressing this key switches frequency control between the VFO and Memory Systems. Press and hold in this key to store the contents of the VFO into the QMB (Quick Memory Bank) register.

LOCK Key

Pressing this key locks the front panel keys so as to prevent accidental frequency change. The LOCK key itself, though, will never be disabled.

MAIN DIAL

This is the main tuning dial for the transceiver. It is used both for frequency tuning as well as “Menu” setting in the transceiver.

Liquid Crystal Display

The Liquid Crystal Display (LCD) provides indication of the operating frequency and other aspects of transceiver status.

22	FT-857 Operating Manual

SIGNAL GND

FRONT PANEL CONTROL & SWITCHES

MIC Jack

Connect the supplied MH-31A8J Hand Microphone to this jack.

SP-PH Switch

If you use earphones with this transceiver, move this switch to the “PH” position before inserting the earphone plug into the SP/PH Jack, to prevent injury your ears.

METER Jack

This 3.5-mm 2-pin jack is used for connection to an analog meter (not

produced by Vertex Standard). Please refer to the MENU, No-060 and SIGNAL GND No-061.

SP/PH Jack

This 3.5-mm, 2-pin jack provides variable audio output for an external speaker (4 W ~ 16 W impedance) or earphones. The audio level varies according to the setting of the front panel’s AF knob.

Important Note: When you insert an earphone plug into this jack, the SP-PH slide switch (located on the back side of front panel) MUST BE set to the “PH” position, to prevent the possibility of injury to your ears.

CONTROL Jack

MAIN BODY (FRONT)

CONTROL Jack

PH

SP

FRONT PANEL (BACK)

FT-857 Operating Manual

23

FRONT PANEL CONTROL & SWITCHES

MULTI FUNCTION KEY DETAIL

The [A], [B], and [C] keys select many of the most important operating features of the transceiver. When you press the [FUNC] key, then rotate the SELECT knob, the current function of that key will appear above each of the [A], [B], and [C] keys (along the bottom of the LCD). You may scroll the display through 17 rows of functions available for use via the [A], [B], and [C] keys.

SELECT

[FUNC] [A]

[B]

[C]

DIAL

Multi Function Row “a” (MFa) [A/B, A=B, SPL]

Ó	Ó	Ó
[A]	[B]	[C]

[A] Key: A/B

Press the [A](A/B) key to switch between VFO-A and VFO-B on the display.

[B] Key: A=B

Press the [B](A=B) key to copy the contents of Main VFO to be copied into the Sub VFO, so that the two VFOs’ contents will be identical.

[C] Key: SPL

Press the [C](SPL) key to activate Split frequency operation between VFO-A and VFO-B.

ô

Multi Function Row “b” (MFb) [MW, SKIP, TAG]

Ó	Ó	Ó
[A]	[B]	[C]

[A] Key: MW

Press this key momentarily to enable the “Memory Check” mode, to allow selection of an empty memory channel prior to frequency storage. Press and hold in the [A](MW) key for one second to transfer the contents of the VFO into the selected Memory register.

[B] Key: SKIP

Press the [B](SKIP) key to designate the current Memory channel to be “skipped” during scanning.

[C] Key: TAG

Press the [C](TAG) key to select the display type (Frequency or Al- pha-numeric Tag) during Memory operation. Press and hold in this key for one second, while on a recalled channel, to open Menu No.- 056, for quick programming of an Alphanumeric Tag.

ô

24	FT-857 Operating Manual

FRONT PANEL CONTROL & SWITCHES

MULTI FUNCTION KEY DETAIL

Multi Function Row “c” (MFc) [STO, RCL, PROC]

Ó	Ó	Ó
[A]	[B]	[C]

[A] Key: STO

Press the [A](STO) key to store the contents of the VFO into the QMB (Quick Memory Bank) register.

[B] Key: RCL

Press the [B](RCL) key to recall the QMB Memory. [C] Key: PROC

Press the [C](PROC) key to activate the speech processor for SSB and AM transmission.

Press and hold in the [C](PROC) key for one second to recall Menu Mode No-074 [PROC LEVEL] (for setting the compression level of the AF Speech Processor).

ô

Multi Function Row “d” (MFd) [RPT, REV, VOX]

Ó	Ó	Ó
[A]	[B]	[C]

[A] Key: RPT

Press the [A](RPT) key to select the direction of the uplink frequency shift (+, – or simplex) during FM repeater operation.

Press and hold in the [A](RPT) key for one second to recall Menu Mode No-076 [RPT SHIFT] (for setting the shift frequency offset). [B] Key: REV

Press the [B](REV) key to reverse the transmit and receive frequencies while working through a repeater.

[C] Key: VOX

Press the [C](VOX) key enable the VOX (voice-operated transmitter switching system) in the SSB, AM, and FM modes.

Press and hold in the [C](VOX) key for one second to recall Menu Mode No-088 [VOX GAIN] (for setting the VOX gain level).

ô

FT-857 Operating Manual

25

FRONT PANEL CONTROL & SWITCHES

MULTI FUNCTION KEY DETAIL

Multi Function Row “e” (MFe) [TON, – – –, TDCH] ([ENC, DEC, TDCH])

Ó	Ó	Ó
[A]	[B]	[C]

Ó	Ó	Ó
[A]	[B]	[C]

[A] Key: TON/ENC

Press the [A](TON) key to activate CTCSS or DCS operation on FM. When the Split Tone feature is activated via Menu Mode No-079 [SPLIT TONE], this key function changes to “ENC” for activation of the CTCSS Encoder or DCS Encoder. Press the [A](ENC) key to activate the encoder.

Press and hold in the [A](TON/ENC) key for one second to recall Menu Mode No-083 [TONE FREQ] (for selecting the CTCSS tone frequency). [B] Key: – – – /DEC

Normally, this key does nothing.

When the Split Tone feature is activated via Menu Mode No-079 [SPLIT TONE], this key function changes to “DEC” to engage the DCS or CTCSS Decoder. Press the [B](DEC) key to activate the decoder.

Press and hold in the [B](DEC) key for one second to recall Menu Mode No-033 [DCS CODE] (for selecting the DCS code).

[C] Key: TDCH

Press the [C](TDCH) key to initiate CTCSS Tone or DCS Search.

ô

Multi Function Row “f” (MFf) [ARTS, SRCH, PMS]

Ó	Ó	Ó
[A]	[B]	[C]

[A] Key: ARTS

Press the [A](ARTS) key to initiate the Auto-Range Transponder mode. Press and hold in the [A](ARTS) key for one second to recall Menu Mode No-008 [ARTS BEEP] (for selecting the ARTS “Beep” option). [B] Key: SRCH

Press the [B](SRCH) key to activate the Smart Search feature. Press the [B](SRCH) key to initiate Smart Search scanning. [C] Key: PMS

Press the [C](PMS) key to activate the Programmable Memory Scan feature (programmable sub-band limits for tuning or scanning).

ô

Multi Function Row “g” (MFg) [SCN, PRI, DW]

Ó	Ó	Ó
[A]	[B]	[C]

[A] Key: SCN

Press the [A](SCN) key to initiate Scanning (in the direction of higher frequencies).

[B] Key: PRI

Press the [B](PRI) key to activate the Priority Scan feature. [C] Key: DW

Press the [C](DW) key to activate the Dual Watch feature.

ô

26	FT-857 Operating Manual

FRONT PANEL CONTROL & SWITCHES

MULTI FUNCTION KEY DETAIL

Multi Function Row “h” (MFh) [SCOP, WID, STEP]

Ó	Ó	Ó
[A]	[B]	[C]

[A] Key: SCOP

Press the [A](SCOP) key to activate the Spectrum Scope Monitor feature.

Press and hold in the [A](SCOP) key for one second to initiate the Spectrum Scope.

[B] Key: WID

Press the [B](WID) key to select the visible bandwidth for the Spectrum Scope Monitor.

Press and hold in the [B](WID) key for one second to select the operating mode for the Spectrum Scope Monitor.

[C] Key: STEP

Press the [C](STEP) key to select the channel steps for Spectrum Scope Monitor.

Press and hold in the [C](STEP) key for one second to activate the MAX HOLD feature, which will display and hold the peak signal strength level for each channel.

ô

Multi Function Row “i” (MFi) [MTR, – – –, DISP]

			[A] Key: MTR
			Pressing the [A](MTR) key repeatedly allows selection of the display
			function of the meter in the transmit mode.	......
			PWR à ALC à SWR à MOD à PWR
Ó	Ó	Ó	The selected function will appear above the [B] key.
[A]	[B]	[C]	Press and hold in the [A](MTR) key for one second to recall Menu

Mode No-062 [MTR PEAK HOLD] (for setting the “peak-Hold” function of the meter).

[B] Key

Pressing the [B] key repeatedly allows selection of the display func-

tion of the meter in the transmit mode.

PWR à MOD à SWR à ALC à PWR ......

[C] Key: DISP

Press the [C](DISP) key to switch the display between the Large Character and Small Character modes. In the “Large Character” mode, the VFO/Memory label and the Mode indication will disappear, as the frequency display field is doubled in size.

Press and hold in the [C](DISP) key for one second to recall Menu Mode No-043 [DISP INTENSITY] (for setting of the display brightness level).

ô

FT-857 Operating Manual

27

FRONT PANEL CONTROL & SWITCHES

MULTI FUNCTION KEY DETAIL

Multi Function Row “j” (MFj) [SPOT, BK, KYR]

Ó	Ó	Ó
[A]	[B]	[C]

[A] Key: SPOT

Press the [A](SPOT) key to activate the CW spotting heterodyne oscillator.

[B] Key: BK

Press the [B](BK) key to enable CW “Semi-break-in” operation. Press and hold in the [B](BK) key for one second to recall Menu Mode No-029 [CW SIDE TONE] (for setting the CW side tone volume level). [C] Key: KYR

Press the [C](KYR) key to activate the built-in Electronic Keyer. Press and hold in the [C](KYR) key for one second to recall Menu Mode No-030 [CW SPEED] (for setting the Keyer speed).

ô

Multi Function Row “k” (MFk) [TUNE, DOWN, UP]

Ó	Ó	Ó
[A]	[B]	[C]

[A] Key: TUNE

Press the [A](TUNE) key to activate the optional FC-30 Automatic Antenna Tuner or ATAS-100/-120 Active-Tuning Antenna System. Press and hold in the [A](TUNE) key for one second to initiate tuner or antenna retuning.

[B] Key: DOWN

Press and hold in the [B](DOWN) key to lower the ATAS-100/-120 antenna manually.

[C] Key: UP

Press and hold in the [C](UP) key to raise the ATAS-100/-120 antenna manually.

ô

Multi Function Row “l” (MFl) [NB, AGC, – – –]

Ó	Ó	Ó
[A]	[B]	[C]

[A] Key: NB

Press the [A](NB) key to activate the receiver’s IF Noise Blanker. Press and hold in the [A](NB) key for one second to recall Menu Mode No-063 [NB LEVEL] (for setting of the NB level).

[B] Key: AGC

Press the [B](AGC) key to disable the receiver’s AGC system. Normally, the AGC should be left On.

[C] Key

Press the [C] key to select the recovery time (Slow, Fast, or Auto) for the receiver’s AGC system.

ô

28	FT-857 Operating Manual