ic-746.pdf
(
2219 KB
)
Pobierz
IC-746_8.qxd
INSTRUCTION MANUAL
VHF/HF ALL MODE TRANSCEIVER
i746
This device complies with Part 15 of the FCC rules. Operation is sub-
ject to the following two conditions: (1) This device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
IMPORTANT
READ THIS INSTRUCTION MANUAL CAREFULLY
before attempting to operate the transceiver.
SAVE THIS INSTRUCTION MANUAL
—This manual
contains important safety and operating instructions for
the IC-746.
PRECAUTIONS
R
WARNING!
HIGH VOLTAGE! NEVER
attach an
antenna or internal antenna connector during trans-
mission. This may result in an electric shock or burn.
AVOID
placing the transceiver against walls or putting
anything on top of the transceiver. This will obstruct
heat dissipation.
R
NEVER
apply AC to the [DC13.8V] socket on the
transceiver rear panel. This could cause a fire or ruin
the transceiver.
During mobile operation,
DO NOT
operate the trans-
ceiver without running the vehicle’s engine. When
transceiver power is ON and your vehicle’s engine is
OFF, the vehicle’s battery will soon become exhausted.
R
NEVER
apply more than 16 V DC, such as a 24 V
battery, to the [DC13.8V] socket on the transceiver rear
panel. This could cause a fire or ruin the transceiver.
Make sure the transceiver power is OFF before start-
ing the vehicle. This will avoid possible damage to the
transceiver by ignition voltage spikes.
R
NEVER
let metal, wire or other objects touch any in-
ternal part or connectors on the rear panel of the trans-
ceiver. This may result in an electric shock.
During maritime mobile operation, keep the transceiver
and microphone as far away as possible from the mag-
netic navigation compass to prevent erroneous indica-
tions.
NEVER
allow children to play with equipment contain-
ing a radio transmitter.
BE CAREFUL!
The heatsink will become hot when op-
erating the transceiver continuously for long periods.
NEVER
expose the transceiver to rain, snow or any liq-
uids.
BE CAREFUL!
If a linear amplifier is connected, set
the transceiver’s RF output power to less than the lin-
ear amplifier’s maximum input level, otherwise, the lin-
ear amplifier will be damaged.
AVOID
using or placing the transceiver in areas with
temperatures below –10°C (+14°F) or above +60°C
(+140°F). Be aware that temperatures on a vehicle’s
dashboard can exceed 80°C (+176°F), resulting in per-
manent damage to the transceiver if left there for ex-
tended periods.
Use Icom microphones only (supplied or optional).
Other manufacturer’s microphones have different pin
assignments and connection to the IC-746 may dam-
age the transceiver.
AVOID
placing the transceiver in excessively dusty en-
vironments or in direct sunlight.
EXPLICIT DEFINITIONS
BUILT-IN DSP
DSP
The explicit definitions described below apply to this in-
struction manual.
The IC-746’s DSP digitally transposes receive audio
components in all modes of operation to produce de-
sired AF frequency characteristics at the IF stage of
the transceiver. DSP provides the following functions:
WORD DEFINITION
R
WARNING
Personal injury, fire hazard or electric
shock may occur.
CAUTION
Equipment damage may occur.
Noise reduction
—reduces various types of noise
and enhances receive signal components only.
NOTE
If disregarded, inconvenience only. No risk
of personal injury, fire or electric shock.
Automatic notch filter
—automatically reduces single
beat interference and protects the receive voice signals.
The IC-746’s which display the “CE” symbol, comply
with the essential requirements of the 89/336/EEC di-
rective for Electromagnetic Compatibility. This compli-
ance is based on conformity with the ETSI specification
prETS300 684 (EMC product standard for Commer-
cially Available Amateur Radio Equipment).
Selectable APF
—a total of 3 passband widths are
selectable (80/160/320 Hz), for super-narrow filter
APF functions in CW mode. The APF center fre-
quency is adjustable.
ii
TABLE OF CONTENTS
IMPORTANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
EXPLICIT DEFINITIONS . . . . . . . . . . . . . . . . . . . . . ii
BUILT-IN DSP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
TABLE OF CONTENTS . . . . . . . . . . . . . . . . . . . . . iii
7-3 Transferring a memory to VFO . . . . . . . . . . . 50
7-4 Clearing a memory . . . . . . . . . . . . . . . . . . . . 50
7-5 Selecting the call channel . . . . . . . . . . . . . . 51
7-6 Programming a memory . . . . . . . . . . . . . . . . 51
7-7 Programming the call channel . . . . . . . . . . . 52
7-8 Programming scan edges . . . . . . . . . . . . . . 52
7-9 Assigning memory names . . . . . . . . . . . . . . 53
7-10 Memo pads . . . . . . . . . . . . . . . . . . . . . . . . 54
1 PANEL DESCRIPTION . . . . . . . . . . . . . . . . . . 2–7
1-1 Front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1-2 Rear panel . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1-3 Function display . . . . . . . . . . . . . . . . . . . . . . . 7
8 SCAN OPERATION . . . . . . . . . . . . . . . . . . . 55–58
8-1 Scan types . . . . . . . . . . . . . . . . . . . . . . . . . . 55
8-2 Programmed scan and
fine programmed scan . . . . . . . . . . . . . . . . . 56
8-3 Memory scan . . . . . . . . . . . . . . . . . . . . . . . . 57
8-4 Select memory scan . . . . . . . . . . . . . . . . . . . 57
8-5
:
F scan and fine
:
F scan . . . . . . . . . . . . . . 58
2 MENU SELECTION . . . . . . . . . . . . . . . . . . . . . 8–9
2-1 Menu set 1 flow chart . . . . . . . . . . . . . . . . . . . 8
2-2 Menu set 2 flow chart . . . . . . . . . . . . . . . . . . . 9
3 BASIC OPERATION . . . . . . . . . . . . . . . . . . 10–17
3-1 Before operating . . . . . . . . . . . . . . . . . . . . . . 10
3-2 Squelch and receive (RF) sensitivity . . . . . . 12
3-3 Selecting VFO/memory mode . . . . . . . . . . . 13
3-4 Toggling between VFO A/B and transferring
contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3-5 Setting a band and frequency . . . . . . . . . . . 14
3-6 Selecting an operating mode . . . . . . . . . . . . 17
9 INTERNAL ANTENNA TUNER . . . . . . . . . . . . . 59
9-1 Before operating . . . . . . . . . . . . . . . . . . . . . . 59
9-2 Tuner operation . . . . . . . . . . . . . . . . . . . . . . . 59
10 SET MODE . . . . . . . . . . . . . . . . . . . . . . . . . 60–64
10-1 Selecting set mode . . . . . . . . . . . . . . . . . . . 60
10-2 Set mode items . . . . . . . . . . . . . . . . . . . . . 60
4 USING DIFFERENT OPERATING MODES . 18–36
4-1 Operating SSB . . . . . . . . . . . . . . . . . . . . . . . 18
4-2 Operating CW . . . . . . . . . . . . . . . . . . . . . . . . 20
4-3 Operating RTTY (FSK) . . . . . . . . . . . . . . . . . 28
4-4 Operating AM . . . . . . . . . . . . . . . . . . . . . . . . 30
4-5 Operating FM . . . . . . . . . . . . . . . . . . . . . . . . 32
4-6 Repeater operation . . . . . . . . . . . . . . . . . . . 34
4-7 Packet operation . . . . . . . . . . . . . . . . . . . . . . 36
11 ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . 65–66
11-1 Tuning dial brake . . . . . . . . . . . . . . . . . . . . 65
11-2 Frequency calibration . . . . . . . . . . . . . . . . . 65
11-3 Measuring SWR . . . . . . . . . . . . . . . . . . . . . 66
11-4 Adjusting the LCD . . . . . . . . . . . . . . . . . . . 66
12 SETUP AND CONNECTIONS . . . . . . . . . . 67–75
12-1 Front panel . . . . . . . . . . . . . . . . . . . . . . . . . 67
12-2 Rear panel . . . . . . . . . . . . . . . . . . . . . . . . . 68
12-3 Selecting a location . . . . . . . . . . . . . . . . . . 69
12-4 Power supply connections . . . . . . . . . . . . . 69
12-5 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . 70
12-6 Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
12-7 Data communications . . . . . . . . . . . . . . . . . 72
12-8 RTTY connections . . . . . . . . . . . . . . . . . . . 73
12-9 Remote jack . . . . . . . . . . . . . . . . . . . . . . . . 74
5 FUNCTIONS FOR RECEIVE . . . . . . . . . . . . 37–42
5-1 Simple band scope . . . . . . . . . . . . . . . . . . . . 37
5-2 Preamp and attenuator . . . . . . . . . . . . . . . . 38
5-3 RIT function . . . . . . . . . . . . . . . . . . . . . . . . . 38
5-4 AGC function . . . . . . . . . . . . . . . . . . . . . . . . 39
5-5 1/4 function . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5-6 NB function . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5-7 Noise reduction . . . . . . . . . . . . . . . . . . . . . . 40
5-8 Auto notch (ANF) function . . . . . . . . . . . . . . 40
5-9 Dial lock function . . . . . . . . . . . . . . . . . . . . . 40
5-10 Twin PBT . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5-11 Selecting IF filters . . . . . . . . . . . . . . . . . . . . 42
13 OPTIONAL INSTALLATIONS . . . . . . . . . . 76–80
13-1 Opening the transceiver’s case . . . . . . . . . 76
13-2 UT-102
VOICE SYNTHESIZER UNIT
. . . . . . . . . 77
13-3 CR-282
HIGH STABILITY CRYSTAL UNIT
. . . . . 77
13-4 Optional IF filters . . . . . . . . . . . . . . . . . . . . 78
13-5 Linear amplifier connections . . . . . . . . . . . 79
13-6 External antenna tuner connections . . . . . . 80
6 FUNCTIONS FOR TRANSMIT . . . . . . . . . . . 43–48
6-1 VOX function . . . . . . . . . . . . . . . . . . . . . . . . . 43
6-2 Break-in function . . . . . . . . . . . . . . . . . . . . . 44
6-3
:
TX function . . . . . . . . . . . . . . . . . . . . . . . . 45
6-4 Monitor function . . . . . . . . . . . . . . . . . . . . . . 45
6-5 Speech compressor . . . . . . . . . . . . . . . . . . . 46
6-6 Split frequency operation . . . . . . . . . . . . . . . 47
6-7 Quick split function . . . . . . . . . . . . . . . . . . . . 48
14 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . 81–83
14-1 Fuse replacement . . . . . . . . . . . . . . . . . . . 81
14-2 Resetting the CPU . . . . . . . . . . . . . . . . . . . 81
14-3 Troubleshooting . . . . . . . . . . . . . . . . . . . . . 82
7 MEMORY CHANNELS . . . . . . . . . . . . . . . . 49–54
7-1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
7-2 Memory channel selection . . . . . . . . . . . . . . 49
15 SPECIFICATIONS AND OPTIONS . . . . . . 84–85
15-1 Specifications . . . . . . . . . . . . . . . . . . . . . . . 84
15-2 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
iii
1
PANEL DESCRIPTION
1-1 Front panel
Å
6
7
8
Å
TUNER
ANT
POWER
1
NR APF
TRANSMIT
2
9
PHONES
3
NR
APF/ANF
!0
!1
!2
ı
ELEC-KEY
AF RF/SQL
4
MIC
!3
5
q
POWER SWITCH [POWER]
• When the tuner cannot tune the antenna, the tuning
circuit is bypassed automatically after 20 sec.
Push momentarily to turn power ON. (p. 11)
• Turn the optional DC power supply ON in advance.
u
ANTENNA SELECTOR SWITCH [ANT]
(p. 71)
Toggles between the HF and 50 MHz antenna con-
nectors.
Push and hold to turn power OFF.
w
TRANSMIT SWITCH [TRANSMIT]
Toggles between transmit and receive.
• The [TX] indicator lights red while transmitting and the
[RX] indicator lights green when the squelch is open.
i
NOISE REDUCTION LEVEL CONTROL [NR]
(p. 40)
Adjusts the noise reduction level when the noise re-
duction function is in use. Set for maximum read-
ability.
e
HEADPHONE JACK [PHONES]
(p. 67)
Accepts headphones.
• When headphones are connected, the internal speaker
or connected external speaker does not function.
o
AUDIO PEAK FILTER CONTROL [APF]
(p. 20)
Varies the peak frequency of the audio peak filter to
pick out a CW signal from interference while the
APF function is ON.
r
ELECTRONIC KEYER JACK [ELEC-KEY]
(p. 67)
Accepts a paddle to activate the internal electronic
keyer for CW operation.
• Selection between the internal electronic keyer, bug-key
and straight key operation can be made in keyer set
mode.
• A straight key jack is separately available on the rear
panel.
• Key polarity (dot and dash) can be reversed in keyer set
mode.
• 4-channel memory keyer is available for your conve-
nience.
!0
NOISE REDUCTION SWITCH [NR]
(p. 40)
Toggles the noise reduction function ON and OFF.
Functions in SSB, CW and RTTY modes.
!1
AUDIO PEAK FILTER/AUTO NOTCH SWITCH
[APF/ANF]
Toggles between the audio peak (p.20) and auto
notch (p. 40) functions.
• The audio peak filter functions in CW mode only; the
auto notch functions in SSB, FM and AM modes only.
• The APF or ANF indicator appear in the display de-
pending on which function is selected.
t
MICROPHONE CONNECTOR [MIC]
Accepts the supplied or optional microphone.
• See p. 85 for appropriate microphones.
• See p. 67 for microphone connector information.
When the APF indicator appears, push this
switch for 1 sec., one or more times to select 320
Hz, 160 Hz or 80 Hz bandwidths.
• Use the [APF] control to vary the peak frequency.
y
ANTENNA TUNER SWITCH [TUNER]
(p. 59)
Turns the antenna tuner ON and OFF (bypass)
when pushed momentarily.
!2
AF CONTROL [AF]
(inner control; p. 12)
Varies the audio output level from the speaker.
Starts to tune the antenna manually when
pushed for 2 sec.
2
PANEL DESCRIPTION
1
!3
RF GAIN/SQUELCH CONTROL [RF/SQL]
(p. 12)
Adjusts the RF gain and squelch threshold level.
The squelch removes noise output from the speaker
(closed condition) when no signal is received.
• The squelch is particularly effective for FM. It is also
available for other modes.
• The control can be set as the RF gain control only
(squelch is fixed open) or squelch control (RF gain is
fixed at maximum) in set mode.
• Setting RF gain
Maximum
RF gain
Maximum
RF gain
sensitivity
Adjustable
range
Minimum
RF gain
sensitivity
• Setting squelch
Noise squelch
operating range
Squelch
threshold
S-meter squelch
threshold
Squelch
open
S-meter squelch
operating
range
!4
!5
!6
!7 !8
!9
@0
@1
ı
MIC GAIN
RF PWR
CW PITCH
KEY SPEED
P.AMP/ATT
NB
VOX/BK-IN MONITOR
!4
MIC GAIN CONTROL [MIC GAIN]
Adjusts the microphone input gain.
turn the VOX function ON; push for 1 sec. to turn
the VOX function OFF. (p. 43)
In CW mode, push momentarily to select semi
break-in, full break-in or break-in OFF; push for 2
sec. to enter break-in set mode. (p. 44)
!5
RF POWER CONTROL [RF PWR]
(p. 84)
Continuously varies the RF output power from mini-
mum (2 W*) to maximum (100 W*).
*AM mode: 2–40 W, other modes: 5–100 W.
@1
MONITOR SWITCH [MONI]
(p. 45)
Push to toggle the monitor function ON and OFF.
!6
CW PITCH CONTROL [CW PITCH]
(p. 20)
Shifts the received CW audio pitch and monitored
CW audio pitch without changing the operating fre-
quency.
• The pitch can be changed from 300 to 900 Hz in approx.
3 Hz steps.
Push for 2 sec. to enter and exit monitor set
mode.
!7
ELECTRONIC CW KEYER SPEED CONTROL
[KEY SPEED]
(p. 22)
Adjusts the internal electronic CW keyer’s speed.
• 6 wpm to 60 wpm can be set.
!8
PREAMP/ATTENUATOR SWITCH [P.AMP/ATT]
(p. 38)
Push momentarily to toggle between preamp-1
and preamp-2.
Push for 1 sec. to toggle the attenuator function
ON and OFF.
!9
NOISE BLANKER SWITCH [NB]
(p. 39)
Toggles the noise blanker ON and OFF. The noise
blanker reduces pulse-type noise such as that gen-
erated by automobile ignition systems. This function
cannot be used for FM, or non pulse-type noise.
@0
VOX/BREAK-IN SWITCH [VOX/BK-IN]
In SSB, AM and FM modes, push momentarily to
3
Plik z chomika:
jarkeczek
Inne pliki z tego folderu:
comtex_ct589vhf.pdf
(9034 KB)
IC-746(pl)(1).pdf
(17297 KB)
ic-746(1).pdf
(2219 KB)
FT8_ZL2IFB[12814].pdf
(3892 KB)
technika_slabych_sygnalow_3(1).pdf
(2846 KB)
Inne foldery tego chomika:
ABC Telegrafii
anteny
ATARI ST
Atari XE
Core Wars
Zgłoś jeśli
naruszono regulamin