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
28
29
30
30
30
31
3’2
33
33
33
33
34
34
35
35
3fi
36
37
RX
12
13
I6
18
FT-790RII ALL MODE
2
2
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
Hz
rubber
w/FL-7025
max
kHz
mA
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
SN
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
TX
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
IW
into 8 ohms
4 - 16 ohms
-2-
@IO%
FM
THD
3-
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
‘+’
or
‘-’
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
I
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.
MR
(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).
M
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-
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