YAESU FT-790R2 User guide

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OPERATING

MANUAL.

FT-790RlI

Cf NI’I~:N’I’S

01.

SPECIFICATIONS , , , , , , , ,

. . . . . .

I.1 01 NI:Rhl.

I.2 RI:CI’:IVI;R I.3 l’I~ANCMI’l’TI:I~

1.4

surrl.w:n ~c~cmm~t~rs

1.5 OPTIONS

82.

CONTROLS & CONNECTORS , ,

2.1 FRONT PANEL

2.2 REAR PANEL

2.3 FBA-6 BATTERY CASE

2.4 FL-7025 LINEAR AMPLIFIER

S3.

INSTALLATION &

3.1 Portable Station Setup

3.2 Mobile Installation

3.3 Base Station Installation

3.4 FTS-7 Tone Squelch

3.4.1 Installation

3.4.2 Tone Frequency Selection

3.4.3 Tone Level Adjustment

84. OPERATION . . . . . . . . . . . . . . . . . . .

4.1 Squelch Setup and Tuning

4.2 Mode Selection

4.3 FM Operation

4.4 SSB Operation

4.5 cw operation

4.6 Memory Operation

4.6.1

Alternate VFO

4.6.2 CALL Channel (Versions A and X only)

4.6.3 Standard Memories

4.7 Scanning

4.7.1 Stopping the Scanner

4.7.2 VFO (all band) scanning:

4.7.3 Stored memory channel scanning:

4.7.4 Skip Scanning

4.7.5 Programmable Memory Scanning

4.8 Priority Channel Checking

4.9 Odd Split Operation

4.9.1

Semi-DUPlex

4.9.2

Semi-DUPlex

4.10 Tone Squelch and Tone Burst

4.11 Getting the Most from your Batteries

4.12 Memory Backup

ACCESSORlES

operation with Dual

operation from a memory:

(

(PMS)

VFOs:

. 2

. 16

20 22 24 24 25 25

. . 26

26 27 27

29 30 30 30 31

3’2

33 33 33 33 34 34 35 35

3fi

36 37 RX

12 13 I6

FT-790RII ALL MODE

3 4 4

6 6

The FT-790RII is a synthesized uhf FM, SSB ceiver designed for convenient portable, mobile or base station applications on the 70cm amateur band. Up to as a mobile or base when used with the FL-7025 clip-on linear amplifier, or

2.5W

case and/or amplifier are optional in some countries). The lightweight die-cast chassis and simple controls (just three knobs and ten keys) make the FT-790RII ideal for emergencies as well as daily rugged multi-use operation.

Operating conveniences include selectable, mode dependent channel steps, dual status (when optional tone unit is installed). Split frequency semi-duplex operation between the two vfos is provided, as well as one touch reverse for split memories and standard repeater splits. Scanning features include manual and automatic up/down band, memory and selective memory scanning from the tuning knob or supplied microphone, plus priority channel monitoring of any memory while operating on either vfo, and PMS (programmable memory scanning) between memories 1 and 2. An all mode noise blanker and clarifier control are included, and semi break-in QSK is provided for CW.

Please read this manual carefully to gain maximum enjoyment from your

FT-790RII.

UHF MULTI-PURPOSE TRANSCEIVER

(USB &

25W

of RF power output are available

output as a portable with 9 Ni-Cd batteries (batteries, battery

vfos

and ten memories for frequency, mode, repeater shift and tone

-l-

LSB) and CW trans-

8 I. SI’I~‘CIFICATIONS

1.1 CENtVIAL

Frequency

per bee Model

hission

FM, SSB (LSB/USB),

Channel steps:

FM:

SSWCW: 25/100/2500

Antenna:

BNC jack flex antenna supplied)

Supply voltage:

8 - 15.8 VDC,

12 15.8 VDC

Supply current

receive: approx 120 transmit: approx 1.5 A

w/FL-7025: 8A

ran8n:

locnl rrqulrnmrnts

Chnrr)

types:

12.5, 25 or 50

(YHA-44D

(@l2V):

(for

2.5W

RF)

C W

rubber

w/FL-7025

max

kHz

f’nm s12e (WHD):

150 x 57 x 194mm

wlFl+I-8

Wnl8ht

I,7 kg lhn FIJA-8)

2.1

1.2 RECEIVER

Circuit type:

SSWCW:

FM:

Intermediate Frequencies:

54.5 MHz, 13.9885 MHz, 455

Sensitivity:

ssB/cw:

FM: 0.25 uV for

Image rejection:

better than 60dB

IF rejection:

better than 70dB

or FL-7025

kfl with t’l,-7025

Double conversion

Triple conversion

kHz (only

FM)

0.2 UV for

IOdB

12dB SINAD

TRANSMITTER

1.3

Input power:

11.5w @13.8V (2.5W output)

Modulation type:

SSB: balanced, filtered FM:

variable reactance

kmi0n

Carrier suppression:

Unwanted sideband suppression:

(FM):

+5 kHz

better than 40dB

better

tha:?

40dB

Spurious response:

-6OdB

AF Response:

300 - 2700 Hz

Microphone:

400 ohms, dynamic

Frequency stability

First 30 min.: 300 Hz After 30 min.: 50 Hz

Specifications may be subject to change in the interest of technological improvements, without obligation to owners.

(-6dB)

(@25”C):

FT-790RII Model

Chart

Selectivity

Audio

External Speaker impedance:

(-6/-60dB):

2.415.2kHz SSBKW, 12/25kHz

Output

into 8 ohms

4 - 16 ohms

-2-

@IO%

THD

1.4 SUPPLIED ACCESSORIES

l Ext Spkr and Ext Power

Other items from

the fullowln~ Optlona Ilnt,

Pluna

according to version

and local requirements.

1.5 OPTIONS

Shoulder Strap (for portable YHA-44D Rubber Flex Antenna ( ” ” ” FBA-8 Battery Case for 9 FL-7025 FP-700

FP-700s

25W

Linear Amplifier AC Power Supply for FL-7025 External AC Power Supply

‘C’

ops)

)

cells

FTE-2 1750 Hz Tone Burst Generator FTS-7 CTCSS Tone Squelch Unit

MH-lOE8 MH-IOFB

Standard Hand Microphone Scanning Speaker/Microphone

MH-15C8 Scanning DTMF Keypad Microphone MF- 1

A3B

NG26BlCID

Flexible Boom Microphone Ni-Cd Charger for

117/220/234V

MMB-31 Mobile Mounting Bracket csc-19

Soft Case for YH-1 Headset

SB-IO

PTT Switch Unit for

FT-790RlI w/FBA-8

(Mic &

Headphone)

YH-l/MF-lA3B

SP-55 External Speaker

r&9, IO) (2.3) (1) (1) (4.5) (5,6) (7) (7)

(7) (11) (69)

(11)

NC-26BICID

Notes:

(I)

Wired for 117, 220 or 234 VAC per local requirements.

(2)

Battery and Linear Amp cannot be connected at the same time.

(3)

Requires

(4)

Installed as standard in B & C versions.

(5)

FTE-2 and FTS-7 cannot be installed concurrently.

(6)

DIP switch programmable.

(7)

One microphone may be supplied as standard.

(8)

Model suffix indicates AC voltage; cannot be altered.

(9)

NC-26 only for use with FBA-8 to charge Ni-Cd batteries.

(10)

Batteries not included.

(11)

Requires SB-10 PTT Switch Unit

13.8V @BA (FP-700,

or automobile battery).

A-

52.

CONTROLS & CONNECTORS

2.1 FRONT PANEL

(I)

VOUSQL

The inner VOL control includes the power switch (OFF = counterclockwise), and sets the audio volume of the receiver.

The outer SQL control sets the squelch threshold, above which received signals will activate the audio amplifier and be heard in the speaker. Scanning, if active, stops when the squelch opens, and the green BUSY indicator glows. Turn this control fully counterclockwise to disable the squelch. Normally, to squelch off noise, this control is set clockwise just to the point where noise on a clear channel is silenced.

(2) Main Tuning Knob

(3) Function Keys

All front panel keys are active only during reception. The primary function of each of the nine gray keys is marked on the key face. Seven of the gray keys have alternate functions, marked on the panel above each, and activated by the yellow key. Throughout this manual, the alternate function of a key will be indicated by enclosing the name of that function in parentheses 0, corresponding to the label on the panel above the key.

In certain operating situations, a function will be disabled, in which case pressing the key will not result in an audible beep. Otherwise, all acceptable keystrokes will produce a beep.

F (Alternate Function)

This

yellow key has no direct function of its own, but activates the alternate functions of those other keys which have labels marked just above them on the panel. are activated for 3 seconds, while

digits

on the display. After this period, if no key is pressed, the

disappear and the key functions revert to those indicated on the key faces.

RPT

(DUP)

This key toggles standard repeater shift* relative to the receiving frequency: either plus or minus the standard shift, or simplex. Multiple presses cause cycling through the three possible settings. When plus or minus shift is selected a

the lower left corner of the display.

The alternate function of this key

DUPlex)

transmit frequency and mode, and the other determining receiving frequency and mode. Both beneath the selections are ignored in semi-duplex operation.

operation between

VFOs

‘DUP’

label on

When F key is pressed, the alternate functions

‘F’

appears to the left of the frequency

‘F’

will

of the transmitting frequency

‘+’

‘-’

appears near

(DUP)

causes split frequency

VFOs

A and B, with one VFO determining the

should first be set while receiving. A bar appears

the

display, and plus or minus repeater shift

(semi-

This

detented

channel when in the memory mode. VFO tuning steps are selected independently by mode and the STEP key, as described later. In the memory

mode, vacant memory channels are skipped over. The microphone scanning

keys function identically to the Main Tuning Knob.

knob tunes the operating frequency, or selects the memory

-6-

* f

1.6, 5 or 7.6

MHz

according to transceiver version

VFO

(PMS)

The VFO key selects the VFO mode if in the memory mode, and alternates between VFO A and VFO B once in the VFO mode.

The alternate between the frequencies stored in memory channels 1 and 2. Channel numbers ‘1’ and ‘2’ both appear together at the upper left corner of the display during PMS operation, described in detail later.

(PMS)

function activates ‘Programmable Memory Scanning’,

up (DWN)

In the VFO mode, the UP key increments the operating frequency by MHz in the FM mode, or by 100 for more than :-second causes repeated stepping. In the memory mode, the selected memory channel steps up one each time this key is pressed.

The alternate posite direction.

(DWN)

functions causes the same stepping, but in the op-

kHz

in SSB or CW. Holding this key down

STEP (LOW) The STEP key selects the frequency steps for tuning and scanning. In CW and SSB modes, repeated presses of this key select 25, 100 and 2500 Hz in rotation. In FM, the steps are 12.5, 25 and 50

The alternate (LOW) function selects high and low transmitter power. Low power is about bar appears beneath the ‘LOW’ label at the lower right corner of the display.

(PRI)

The MR (Memory Recall) key activates the memory mode from the VFO mode. If already in the memory mode, the MR key is used to set a memory channel for selective memory scanning, described in detail later. An appears at the upper left corner of the display and one or more channel numbers appear along the top edge when in the memory mode.

The alternate a preselected memory is periodically checked for activity while operating in the VFO mode, as described later.

REV (TONE)

The

REVerse

standard shift repeater operation (+ or - repeat active).

(PRI)

key exchanges the transmit and receive frequencies during

1/5th

of high power. When low power is selected, a

function activates

PRlority

channel checking, in which

kHz.

‘M’

MODE

Pressing the MODE key selects FM, CW, in rotation. The selected mode is indicated at the left side of the display.

The alternate modes). When on,

CALL In versions without tone burst, this key instantly recalls the Call Channel Memory,

for simple, quick Burst Unit installed, pressing this key causes a 1750 Hz tone to be trans-

mitted (the Call Channel Memory is not available).

This in the ‘Operation’ section.

(4)

This g-pin jack accepts the microphone, and includes control lines for the

phone.

(NB)

regardless of the previous operating status of the transceiver,

M’smorize

MIC Jack

MH-IOFB

Pinout

USB

and LSB operating modes,

(NB)

function toggles the noise blanker on and off (all

‘NB’

appears near the lower left corner of the display.

QSYing.

key is used for writing new data into memories, as described

Scanning Speaker/Microphone and the is shown below.

In European versions with the FTE-2 Tone

MH-l5C8

DTMF Micro-

The alternate (TONE) function activates and deactivates the FTS-7 CTCSS tone encoder/decoder, if installed. When active, a bar appears beneath

the ‘TONE’ label on the display. The TONE function is disabled when the Tone Burst Unit (or no tone unit) is installed.

-8-

PIN 1 : UP PIN 2 : +B PIN 3 : DWN PIN 4 : SPKR

-9-

PIN 5 : NC

PIN6:PTT

PIN 7 : GND PIN 8 : MIC

(5) CLAR Control

(9) S/PO Meter

This

(CLARifier)

receiving frequency, for fine tuning a signal, especially in SSB and CW modes. Remember to set this control at the center detent for proper frequency display during normal tuning or scanning.

(6)

Liquid Crystal Display

The following diagram shows all of the display segments. DUP, TONE, REV and LOW are printed on the display filter, and their active status is indicated by a bar beneath the label.

control allows approximately ?I

kHz

adjustment of the

This meter indicates relative signal strength while receiving, and relative power output while transmitting.

(IO)

ANT Jack

This BNC socket accepts the YHA-44D rubber flex antenna, or other antenna having 50 ohms impedance on the 70cm band. When the FL-7025

Linear Amplifier is connected, this jack is disconnected internally, as the

jack on the back of the amplifier is used instead.

(II) EXT SP Jack (Left Side Panel)

This 2-contact mini phone jack accepts a 4- to like the inserted into this jack.

(12) KEY Jack (Left Side Panel)

This 2-contact mini phone jack accepts a CW key for CW transmission. Open circuit voltage is

Yaesu

SP-55. The internal speaker is disabled when a plug is

+5V,

and closed circuit current is 0.6

16-ohm

external speaker,

mA.

(7) BUSY Indicator

During reception, this green LED glows whenever a signal (or noise) is received that is strong enough to open the squelch. During transmission, this LED flickers with peaks in modulation. Overmodulation causes the LED to glow at full brightness.

(8)

ON AIR Indicator

This red LED glows during transmission. Also, when -battery voltage is low, this LED blinks (during reception and transmission), indicating that the battery needs recharging (or replacement).

-lO-

ll-

2.2 REAR PANEL

(1)

TONE UNIT

The optional FTS-7 mounts behind this subpanel. Tone frequency can be set by the DIP switches on the FTS-7, accessible through the cutout in the subpanel.

(2)

Battery Contacts

(5) RF Jack

This

phone

jack provides RF excitation to, and receiver input from the FL-7025. Connecting the linear amplifier to this jack disconnects the ANT jack on the front panel of the transceiver.

(6)

Lamp Switch Extension

This is a switch extending rod which allows the pilot lamp in the front panel of the transceiver to be activated by the LAMP switch on the rear of the FBA-8 battery case, or by the FL-7025 linear amplifier (which keeps the lamp on all the time during operation).

2.3

FBA-8

BATTERY CASE

(Option)

These two spring contacts accept 8 to

case to

(3) BACKUP Slide Switch

This switch normally left on, except to erase all memories, or for very long term

storage.

(4)

These three recessed contacts are used by the FL-7025 Linear Amplifier for

power the transceiver.

turns

the lithium battery memory backup off and on. It is

Accessory Contacts

T/R

switching and ALC signals.

12-

15.8

V DC from the FBA-8 battery

(1)

Output Terminals

These terminals provide the power connection to the transceiver (keep them clean).

- 13-

(2)

FXT

DC Jack

This coaxial power jack accepts 8 to 15.8 VDC at 1.5 amperes, to power the transceiver from an external DC (negative ground) power source. When the plug is inserted into this jack the batteries in the FBA-6 are disconnected. Use the supplied coaxial plug for making connection to this jack.

(3)

CHG Jack

MEMO

This mini coaxial jack is for connection of the NC-26B

(220VAC)

Ni-Cd batteries are installed in the FBA-8. We do not recommend connecting any other charger or power source to this jack. Furthermore, no connection should be made to this jack unless nine installed.

(4)

LAMP Button

Press this button to illuminate the meter and display, when required. If

desired, the lamp can be set

switched on by pressing and then turning this button

NC-ED (234VAC)

battery chargers when nine rechargeable

stay on whenever the transceiver is

N&Cd

t-turn.

(II’IVAC),

batteries are

NC-26C

2.4 FL-7025

LlNEAR

AMPLIFIER

(Option)

(31

RF Jack

This phono plug accepts RF excitation from, and provides receiver input to the transceiver. When this plug is connected to its mating jack on the transceiver the ANT jack on the front panel of the transceiver is disconnected, and the ANT jack on the FL-7025 becomes active instead.

(4)

Control Line Pins

These three spring-loaded pins mate with the Accessory Contacts on the transceiver,

and

T/R

the tips of these

(5) Supply Output Terminals

carrying external ALC from the linear to the transceiver,

relay control and ALC from the transceiver to the linear. Keep

pins

clean.

(1)

13.8 VDC Cable Pigtails

This cable accepts 12 to 15.8 VDC at BA to power the transceiver and amplifier. The RED lead must be connected to positive voltage, and the

BLACK lead to negative (ground).

(2) ANT Coaxial Jack

This type-N connector must be connected to a proper antenna (one having 50 ohms impedance at the operating frequency). See the following ‘INSTAL-

LATION’ Section for details of proper antennas.

These terminals provide the power connection to the them clean). The contact on the left is ground.

Lamp Actuator Screw

The head of this screw depresses the LAMP switch rod in the transceiver when the linear amplifier is installed, causing the pilot lamp to be on all the time when the transceiver is on. this screw.

To disable the pilot lamp, remove

transceiver

(keep

- 17-

‘83.

INSTALLATION & ACCESSORIES

The FT-790RlI is designed for use as either a portable, mobile or base station, Your

according to which accessories are used with the transceiver.

FT.790RII

will have been supplied with certain accessories for either portable or mobile operation. Contact your Yaesu dealer if you require other options.

3.1 Portable Station Setup

Portable operation requires the FBA-8 Battery Pack, and 9

ter1es,

installed as shown below (make certain that the batteries are

‘C’

size

bat-

installed with the correct polarity). If using rechargeable Ni-Cd cells such as the Yaesu NC-1800’s, you will also need the

NC-XC

(220 VAC) or

NC-26D

(234 VAC) Wall Charger. After installing

NC-26B

(117

VAC),

the cells in the FBA-8, connect the NC-26 to the CHG jack on the FBA-8

and give the batteries a full charge (15 hours) before operating the transceiver for the first time. The FBA-8 may be left connected to the transceiver while charging the batteries, but operating the transceiver while charging is not recommended.

CAUTION: DO NOT ATTEMPT TO CHARGE ALKALINE OR OTHER

DRY CELL BATTERIES IN THE FBA-8.

Connect the supplied YHA-44D antenna to the ANT jack on the transceiver: just push the BNC connectors together while turning the plug clockwise. You can use another antenna with the

FT-790RII,

i-turn

but make certain that it is designed for the 70-cm band (SO-ohm, unbalanced feed). Also, install the shoulder strap in the eyelets on the comers of the transceiver as shown below, and connect the microphone to the MIC jack.

During portable operation, remember that the location of the antenna may have a great affect on signal strength. Weak signals may be improved by moving the transceiver around to obtain the highest S-meter reading

during reception (generally as high and in the clear as possible). The

MH-IOFB

can be especially convenient when it is necessary to reposition the

Speaker Microphone or YH-I Headset and SB-IO PTT Switch Unit

trans-

18-

3.2 Mobile Installation

The FL-7025 Bracket

25-watt

are

available for mobile installations (negative-ground vehicles

Linear Amplifier (with DC Cable) and MMB-31 Mobile

only!). The FL-7025 may be mounted permanently in the Mobile Bracket, if desired, using four of the supplied bolts (the transceiver can still be slid in and out of the bracket for quick conversion to portable or base operation). When mounting the FL-7025 in the bracket,

remove

the latch

clips on either side of the amplifier (two screws each).

The FT-790RII may also be installed as a low power mobile station without the FL-7025, in which case external power from the vehicle battery is supplied to the EXT DC jack on the side of the FBA-8, which must be attached to the transceiver. Use the coaxial power plug supplied with the transceiver to make connections to the EXT DC jack.

Using the bracket as a template, locate the mounting holes in the car body. The transceiver may be installed in any position that will not interfere with driving. Allow space for the cables (and EXT SP plug on the side, if using an external speaker) and transceiver controls. Do not install the transceiver directly in front of a heating vent.

Use the supplied fused DC Cable to make power connections to the car battery: RED wire to the POSITIVE terminal, and BLACK wire to the NEGATIVE terminal. For low power installations without the FL-7025, connect the CENTER contact of the supplied coaxial power plug to the NEGATIVE terminal of the battery, and the OUTER contact to the POSITIVE terminal. We do not recommend connecting into the existing wiring, as this may result in reduced performance.

Mounting Surface

If it becomes necessary to replace the IOA fuses in the DC Cable, make certain to install the same type, with the same rating.

CAUT1oN!’

BE VERY CAREFUL WHEN MAKING POWER CONNECTIONS TO THE AMPLIFIER OR TRANSCEIVER, AND WHEN REPLACING FUSES. YOUR WARRANTY MAY NOT COVER DAMAGE CAUSED BY REVERSED OR IMPROPER SUPPLY VOLTAGE. OR BY USE OF AN IMPROPER FUSE.

“““““““““““““““““““”

-2l-

“,‘;“,“” 13.8V

Connect your antenna the FL-7025. Use the shortest practical length of feedline, with a type-N plug at the transceiver end. The antenna should be one specifically designed for the antenna mounting bracket is well grounded to the car body at the base of the antenna.

feedline

to the type-N coaxial jack on the back of

50.ohm

coax for the

70.cm

amateur band. Make sure the

If using the FL-7025, keep the area around the the free flow of air for cooling.

Connect your antenna the FL-7025. Use the shortest practical length of feedline, with a type-N plug at the transceiver end. The antenna should be one specifically designed for the

feedline

to the type-N coaxial jack on the back of

70-cm

amateur band.

hearsink

50-ohm

clear, to permit

coax for the

Note: The BNC antenna jack on the front panel of the transceiver is automatically disconnected when the FL-7025 is connected.

Slide the transceiver into the bracket carefully until the small catch at the front corner clicks. Press the catch and pull to remove the transceiver.

The optional SP-55 External Speaker (with swivel mount) is recommended for mobile operation with the FT-790RII. Mount the SP-55 in a convenient location, and connect it to the EXT SP jack on the side of the transceiver. The optional MF-IA3B Flexible Boom Microphone adds further convenience in mobile operation. Mount the can be positioned near your mouth when driving, and connect it via the

S&IO

PTT Switch Unit to the

3.3 Base Station Installation

The FT-790RII may be used as a base station with or without the FL-7025

Linear Amplifier. For low power operation without the FL-7025, use the

FP-700s

plied coaxial power plug (CENTER contact NEGATIVE, OUTER contact POSITIVE). Make certain that the

line voltage before connecting it to the AC mains. The charge the batteries in the FBA-8; use the NC-26 for this purpose.

AC Power Supply, connected to the EXT DC jack using the sup-

MF-IA38

MIC

jack.

so that the microphone element

FP-700s

is wired for your local AC

FP-700s

will not

Note:

automatically disconnected when the FL-7025 is connected.

For CW operation, connect your key to the KEY jack on the side of the

transceiver. A plug is provided for

The SP-55 External Speaker, mentioned in the previous section, is also a

convenient addition to base

The BNC antenna jack on the front panel of the transceiver is

this

purpose.

installstlons.

For high power base station operation with the FL-7025, use the fused

(IOA)

DC cable supplied with the Linear Amplifier. We recommend the FP-700 Power Supply, or an equivalent providing 13.8 VDC at uously. Connect the RED power lead to the POSITIVE supply terminal, and the BLACK lead to the NEGATIVE terminal.

Do not place the transceiver on top of another heat generating device.

IOA

contin-

3.4 FTS-7 Tone Squelch

3.42 Tone Frequency Selection

The FTS-7 is a DIP-switch programmable subaudible tone generator and decoder that provides tone squelch operation using the operator’s choice of 37 standard subaudible

(CTCSS)

tones, for silent channel monitoring and operation through CTCSS-equipped repeaters. The FTS-7 can be installed only in transceivers in which the FTE-2 Tone Burst Unit is not already installed. Operation is described in 54.10.

3.4.1

installation

(1)

Remove the battery pack or amplifier, and referring to the photos

below, remove the two screws securing the TONE UNIT

subpanel

the back of the transceiver. Remove the subpanel.

(2)

Locate the plastic connector inside the tone unit compartment, and

mate

it with the jack on the FTS-7, using care to ensure proper

pin alignment.

(3)

Apply the double-sided adhesive tape (supplied) to the FTS-7, and

then attach the FTS-7 in the tone unit compartment as shown.

(4)

Remove the knock-out on the

switches. Then replace the

subpanel

to permit access to the DIP

and its two screws.

With the battery pack or amplifier removed, refer to the DIP Switch Programming Chart below, and set the six switches on the FTS-7 for the desired tone (the switches are Unit subpanel). Note that

‘0’

&cessible

through the hole in the Tone

in the Chart indicates that the switch should be set to the ON position. Switch number 7 should only be set to the OFF position if tone squelched reception is not to be used while CTCSS

transmission is required.

3.4.3 Tone Level Adjustment

The tone output level of the FTS-7 Is preset at the factory for the proper

lWC!l,

and normally requires no

road]ustment.

However, if a particular situation requires a different tone level, this may be adjusted by trimmer potentiometer

VROI,

shown in the photo on the previous page.

54.

OPERATION

Before switching on the transceiver, microphone and battery pack (or external power source) are properly connected. Preset the SQL control fully counterclockwise, and the

CLARlFIER

4.1 Squelch Setup and Tuning

Turn on the transceiver by rotating the VOL control clockwise out of the click-stop. The green BUSY indicator should light, while the display shows the last three, four or five digits of your receiving frequency (beginning with I’s of MHz and a decimal point). Advance the VOL control for comfortable volume on a signal or noise.

to its center detent.

check to ensure that the antenna,

4.2 Mode Selection

Press the MODE key while observing the display of operating mode at the left side of the display. Each time this key is pressed the mode will change, in this order: selected mode will be retained when power is switched off.

4.3 FM Operation

Press the MODE key until ‘FM’ is displayed at the bottom left. In addition to the I MHz giant steps mentioned above, you have a choice of three different tuning steps in the FM mode: 12.5, 25 or 50 digits displayed indicate which digits plus a small just four digits when 25 50

kHz

steps are selected. (and watch the display, as coarser settings).

FM - CW - USB - LSB and back to FM. The

kHz.

The frequency

tuning

steps are currently selected: four

zero

(full-size)

kHz

partial

‘5’ when 12.5

steps are selected, and just 3 digits when

Press the STEP key to change tuning steps

steps are truncated when switching to

kHz

steps are selected,

Press the VFO key to select VFO operation, and use the tuning knob tune to a clear frequency (where only background the SQL

goes off and stays off (and the noise is silenced).

If you have a scanning microphone, try tuning with the microphone

/DWN

down for manual

the PTT switch) momentarily to halt. When the PTT switch is used halt scanning, no transmission occurs.

For ‘large frequency changes, such as for moving from one part of the band to another, ‘giant’ steps are available via the UP (DOWN) key on the front panel. Just press this key once to take one giant step up, or press the F key and then this key to take one giant step down. Hold this key for more than a half-second for multiple giant steps (and just release it to stop). Giant steps are 1 MHz in FM, and 100 modes; nearest giant step.

Control

clockwise just to the point where the green BUSY lamp

buttons, press either button momentarily to

scanning.To

except

at the band edges, where lesser digits are rounded to the

stop, release it and then press it again (or

noise

Is heard). Turn

single

step, or hold it

kHz

in other

UP-

. . . . . . .

Press the RPT key three times

‘DUP’

label on the display: you should see cating plus and minus standard according to version) from the displayed receiving frequency. When neither is displayed, you are set for simplex operation.

MODE/STEP DISPLAYS

A”

VerS

(FM)

12.5

kHZ Step8

transmit

All

CALL Channel IVers

I,1

while .watching.~,just

repeater shift (1.6, 5 or 7.6 MHz,

“ers

(SSB &

I+’

and then

CW)

to the left of the

‘-’

appear, indi-

- 21-

Now tune to the desired operating frequency and press the RPT key as necessary. If on a repeater, you can first check to make sure your transmit frequency will be correct before actually transmitting; just press the REV key to reverse your transmit and receive frequencies, and then press it again to return to normal.

Close the PTT switch on the microphone to transmit. The display will indicate your actual transmitting frequency while the PTT switch is held. If

out

of band, ‘Err’ is displayed, indicating that your repeater shift is

incorrect (no transmission occurs). occasionally check the green BUSY indicator LED: if you are speaking to” loudly (possibly causing distortion) the indicator will be lighting brightly on voice peaks. Speak at a volume that causes the indicator to just occasionally light dimly.

The CALL button in versions B and C automatically keys the transmitter and sends a 1750 Hz burst tone when pressed. Use repeaters that require the burst tone.

If someone wants to chat with you on the repeater, press the REV key while they are transmitting to see if you can hear them on the input. If so, see if they can hear your (reversed) response when they finish talking. If they don’t hear your, press REV to return to the repeater. However, if they can hear you direct (when you are reversed), ask them to QSY to a simplex frequency (to clear the repeater for others).

See also 54.6 Memory Operation,

Most from

4.5 CW Operation

Press the MODE key until

the same as for SSB modes, described above. Connect your key to the

KEY jack on the left side of the transceiver. Key up voltage is

key down current 0.6

vow

Batteries.

indicator will

‘CW’ is

mA.

‘NB’

on the display at the lower left.

be glowing brightly on voice peaks.

84.7

Scanning, and 84.11 Getting the

dlsplayed at the left. Tuning steps are

(NB)

key t” activate

5V,

to”

and

4.4 SSB Operation

Press the MODE key until either used in

t”

the 100 three different tuning steps in the SSB modes: 25 Hz, In all cases, five digits of frequency are dlsplayed, with resolution

100

for every four tuning steps, while when 2.5 last digit will be half-size when it is a

your

area: usually

kHz

giant steps mentioned previously, you have a choice of

Hz. When 25 Hz steps are selected, the display will change only once

USB)

‘USB’ or ‘LSB’

is displayed at the bottom left. In addition

zero

- 28 -

(depending on which is

100

Hz or 2.5

kHz

steps are selected, the

(press the STEP key and

kHz.

Briefly close the key and note the pitch of the sidetone. This is the same pitch that received signals should be tuned for in order t” beat their frequency. Use 25 Hz steps for tuning, and use the control to provides semi break-in operation; returning t” receive one-half second after you stop keying.

Sidetone

VR4002 on the PLL Unit on the bottom of the chassis.

zero

beat. To transmit, just close the key. The FT-790RII

volume is adjustable (together with keypad beep volume) by

CLARifier

zero

4.6 Memory Operation

The FT-790RII has nine standard memories plus the two vfos, which serve as special function memories. Versions A and X also have a calling channel memory, which is recalled by the CALL key. Each stores frequency and mode, and all but the vfos also store (described later). The A and X) are described first:

4.6.1 Alternate VFO

VFO B simply duplicates the VFO functions that have already been described, without affecting the other VFO VFO operation, a small ‘A’ or quency digits on the display. To switch from one VFO to another, just press the VFO key repeatedly. In the following paragraphs, when is referred to, it means either VFO A or

(I)

Press the VFO key to select the source VFO.

(2)

Press

4.6.2 CALL Channel (Versions A and X only)

This special memory allows instant recall of a prestored frequency (and mode and course). Store your main operating frequency or emergency channel here for instant recall.

the

+I-RPT

vfo

memories (and the CALL memory for versions

To copy one VFO to the other:

M key followed immediately by the VFO key.

setting) at any time (except when transmitting, of

To store the CALL channel:

+I-

RPT setting, and tone call data

(VFO

A). Notice that, during

‘8’

appears just to the left of the fre-

‘VFO’

4.6.3 Standard Memories

Data to be stored in the standard memories must originate in the VFO. Once stored, it is possible to change some settings temporarily and even permanently, or to erase the memory altogether. Be careful though, as writing data to a memory always overwrites any previous data stored there.

To store data In a memory:

(I)

Set the VFO for

(2) Press the M key once, followed immediately by the UP key

to select the desired channel number for storage.

(3) Press the M key

Step I includes setting mode and frequency: all will be stored In the memory. At step 2, when M is pressed,

‘M’

will biink at the upper left corner of the display, together with

an one channel number (blinking). Other non-bllnklng channel numbers may

also appear: these already have number that is blinking is the one channel for storage, press the UP key on the front rophone) to step up one channel number (or F channel number). In this case you must press and release the key repeatedly to move some practice, as you are allowed only three seconds maximum between keystrokes. If the blinking again. The time limit provides some of memories.

Once you have successfully reached step 3, operation will return to the original VFO, but now this same data

than one channel, This selection process may require

operatlon as

agaln

to stare.

data

‘M’ dlssppears

desired in the memory.

repeater

aelected

security

shlft (if needed), as well as

stored In them. The one channel

for storage. To select another

panel

(not the mic-

(DWN)

to step down one

before you reach step 3, start

against accidental

will

be available in the memory.

ovwwriting

(1)

Set the VFO to the desired frequency and mode.

(2)

Press the RPT key if this is a repeater channel.

(3)

Press the M key and then the CALL key.

To recall the CALL channel just press CALL. Press CALL again to return to your original channel.

To recall a memory:

(I)

Press the MR key.

(2) Turn knob or use Mic

During memory recall operation, an the recalled memory number to the right of it. You are free to change

UP/DWN

keys to select memories.

‘M’

appears at the upper left, with

-3l-

the mode or repeater shift of a recalled memory: temporary unless you press the M key twice to store the new settings.

Other memories that have been previously stored can be recalled by the tuning knob, or by the

If you have stored a memory but do not want to have it recalled every time you check the other memories, you can ‘hide’ it.

(I)

Recall the memory channel.

(2) Press M and then MR.

The display data will disappear, and the memory will appear empty.

UPIDWN

To delete (hide) a memory:

keys on the microphone.

such changes will be

4.7.1

Stopping the Scanner

Momentarily press the stop the scanner. Note that the normal function of these keys is suspended during scanning, so pressing them will only stop the scanner (no transmission or further scanning will occur). To resume scanning, or to transmit, first release the key or switch, and then press it again.

4.72 VFO (all band) scanning:

(1)

Select VFO frequency and mode.

(2)

Press mic UP or DWN key for I-second.

(3)

Press STEP or MODE to change steps or mode.

(4)

Press mic

UPIDWN

UP/DWN

keys or PTT switch on the microphone to

or PTT, or VFO key to stop.

To recall a deleted (hidden) memory:

(I)

Use the front panel UF’ key to select the memory channel.

(2) Press M and then MR.

Be careful not to overwrite hidden channels when storing new data, as there is no way to distinguish between hidden channels and those that

are

truly

empty.

To return to the VFO from the memory mode,

4.7 Scanning

Three types of scanning are. possible with the

channel or PMS (Programmable Memory Scanning). In each case, scanning

is started by the matically for five seconds when a carrier is detected by the receiver and then resumes again automatically. If the carrier drops while the scanner

is.

paused, scanning will

appears). The decimal on the frequency display blinks while the scanner is paused on a channel.

UP/DWN

keys on the microphone. Scanning pauses auto-

rowme

after one second (unless another carrier

press

the VFO key.

FT-790RII:

VFO, memory

- 32 -

4.7.3 Stored memory channel

(I)

Press MR if not already In Memory mode.

(2)

Press mic UP or DWN key for l-second.

(3)

Press mic

Only the stored memories are scanned.

4.7.4 Skip Scanning

It is also possible to skip certain memory channels only when scanning. Such channels can still be selected manually via the tuning knob or mic

UPIDWN

distinguished by a blinking channel number at top of the display solid numbers for scannable memory channels).

keys, but will be Ignored by the scanner. These channels are

(I)

Press MR if not already in Memory mode.

(2)

Select channel number to skip (top of display).

(3)

Press

(4)

Press mic UP or DWN key for

UP/DWN

Skip a channel during memory scanning:

MR:

channel number should start blinking.

scannln~:

or PTT. or MR key to stop.

&sec

to start scanning.

(vs

To reinstate a channel for scanning, just repeat the above steps, pressing MR when the (blinking) channel number is selected; it will stop blinking.

4.7.5 Programmable Memory Scanning

PMS allows you to scan just a selected portion of the band, between the (lower) frequency stored in memory 1 and the (higher) frequency stored in channel 2. When this PMS mode is active, channel numbers I and 2 are both displayed together at the top left, and scanning as well as manual

tuninR

are limited within the selected range.

PMS (limited band) scanning:

(1)

Store low edge frequency from VFO into channel 1.

(2)

Store high edge frequency from VFO into channel 2.

(3)

Press F and then VFO

(4)

Press mic UP or DWN key for (5) Press STEP or MODE to change either.

(6)

Press mic buttons to stop scanning, and then VFO,

M or CALL to escape the PMS band limits.

4.8 Priority Channel Checking

(PM?,)

IPMS):

Ch nos. I & 2 both displayed.

;-set

to start

scanning.

Step

(I)

can be skipped if the priority channel is already stored in memory, and step when in memory mode).

If priority channel activity interrupts a QSO you are having on the VFC frequency, just press V to return to the VFO, and then MR to return the priority channel.

4.9 Odd Split Operation

The frequency operation with shifts other than the standard repeater provided by the RPT key. in one VFO and the receiving frequency In the other VFO, and then activating the DUP function.

4.9.1 Semi-DUPlex

(2)

can be skipped if it is already selected (or was selected

semi-Duplex

(1)

Set one VFO to the

(2)

Press the VFO key t” select

(3)

Set this VFO to the

(4)

Press F and then

function of the FT-790RII allows split (transmit/receive:

This

is done by storing the transmit frequency

operation with Dual

tranRmlf

receive

RPT(DUP).

bar appears under the

VFOs:

frequency and mode.

the

other VFO.

frequency and mode.

‘DUP’

label on display)

Ias!

shift

While operating on a VFO, you can monitor for activity on a memory channel. While the Priority function is active, the number will be displayed. When a signal is found on that channel, ‘operation will shift to it and priority channel checking will stop.

Priority operation:

(I)

Store priority frequency & mode from VFO to memory.

(2)

Select this memory channel in the memory mode.

(3)

Press F and then

(4)

Operate on VFO as desired.

(The priority channel number is displayed)

(5)

To cancel, press VFO, MR or CALL.

MR(PRI).

prlorlty

memory channel

To cancel DUP operation, press F and then

Note that the mode set in steps I and 3 should normally be set the same; if different, you will end up working cross-mode. While the DUP function is active, you can reverse recall (and operate) on memories by pressing MR. When the used for DUP operation, you can change the transmit frequency using the main knob or microphone You can also store the odd split In memories 3 through 9, or the CALL channel.

VFOs

by pressing the VFO key, and you can

UPIDWN

RPT(DUP)

keys while pressing the PTT switch.

again.

VFOs

are

-35 -

4.9.2

Semi-DUPlex

(1)

Perform all steps in Section 4.9.1.

(2) Press M, and then UP on the front panel to

select the desired memory channel (or CALL in versions A and X) and then M again.

(3)

Press MR to recall the memory.

Memory storage is the same as for regular VFO data, except that

1 and 2 cannot be used. In step 2, you have just three seconds between keystrokes. Also, when operating from memories, you cannot change the channel frequencies (they must be re-entered from the however, to cancel DUP operation or change modes of the memories, and

reverse

split transmit and receive frequencies with the REV key.

4.10 Tone Squelch and Tone Burst

The FTS-7 Tone Squelch Unit is available as an option for versions A and X. Tone frequency and encode/decode or decode-only ted by DIP switches on the FTS-7 through the TONE UNIT when the battery or amplifier is removed. See 63.4 for FTS-7 installation and DIP switch programming.

To activate the tone squelch, press F and then be displayed at the upper right corner of the display, To deactivate the tone squelch, just repeat the same keystrokes. If you wish the tone squelch to be always active on a the memory.

operation from a memory:

particzllar

memory, set the tone on when storing

VFOs).

stetus

REV(TONE).

memories

It is possible,

are selec-

subpanel

‘TONE’ will

4.11 Getting

When operating the FT-790RII with the FBA-8 battery pack, you may wish to prolong the charge life of the batteries as much as possible in

situations. The actual charge life will vary widely according to how much

time is spent transmitting, and

and how you monitor for calls. When the batteries become weak, the red ON AIR indicator will begin to blink. Replace the batteries right away

(or

recharge them if they are rechargeable NI-Cd types).

The LOW power feature of the by up to of always using this feature, switching only to high power when necessary.

To set LOW power transmission: under the ‘LOW’ label on the display).

Press F and then (LOW)

If you find that you always need

antenna (with more gain) Instead of same effect as higher power, without shortening battery life.

You can further increase battery using an SSB mode as much as

ally have greater range

thus allow low power to be used In

be required in FM. Also, SSB requires less current drain by the transmitter, since no carrier needs to be transmitted.

the

Most from your Batteries

(to a

lesser degree), which mode you use

FT-790Rll ten

two

or three times, and It Is e good idea to get into the habit

Press

F and then (LOW) (a bar appears

agaln

t”

return

to hlgh power.

higher

the

life

for non-repeater communications by

posslhle,

than

FM because of narrower bandwidth, and

sItuatIona

greatly extend battery life,

power, consider using a larger

high power setting. This has the

Instead of FM. SSB signals gener-

where high power would

zome

The 1750 Hz burst tone function (in B and C versions) is provided by the FTE-2 Tone Burst Unit, installed at the factory. As mentioned previously, the burst tone can be activated in the FM mode by just pressing the CALL key (the transmitter is keyed automatically when this key is pressed). The tone is transmitted for as long as the CALL key is held. Note that the CALL key cannot be used to recall a memory when the tone burst feature is installed.

- 36

In many cases, where FM repeater would serve just as well, saving

that SSB will not work through en FM repeater, and both stations in

commlmication must

Further savings of battery life

the lowest practical audio volume, and by squelching off the receiver

when monitoring. Using headphones can allow practical operation at low

volume even in noisy surroundings.

be equipped for SSB operation.

communications

consldersble

ten

be obtained during reception by using

31-

are used, simplex SSB

battery drain. Note, however,

The last trick is perhaps the simplest of all, but one easily overlooked: turn the power off when not using the transceiver. The memory backup system will retain all settings when power is off, so there is no need to keep it on unless you are making or expecting a call.

Summarizing, For maximum battery life:

(1) Keep transmissions short.

(2)

Use LOW power whenever possible. (3) Use a high gain

(4)

Use SSB (instead of FM) when you can.

(5)

Keep the audio volume down, or use headphones.

(6)

Squelch the receiver when monitoring.

(7)

Turn the set off when not monitoring or talking.

4.12 Memory Backup

antenna,

if available.

If the transceiver is exposed to high voltage microprocessor can become confused and disoriented, in which situation the transceiver may fail to operate normally. Before seeking repairs, you can try resetting the microprocessor by switching the BACKUP switch on the rear panel off for a minute, and then back on (you must remove the FBA-8 or FL-7025 to access the BACKUP switch).

See also 84.6 Memory Operation, 54.7 Scanning, and Most from your Batteries.

electrostatic

g4.11

discharge the

Getting the

YAESU FT-790R2 User guide

Specifications and Main Features

Frequently Asked Questions

User Manual