ICOM orporated IC-R75 User Manual US IC R75 IM 1

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Date Submitted	1999-04-02 00:00:00
Date Available	1999-04-09 00:00:00
Creation Date	1999-03-23 15:18:22
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Document Title	US IC-R75 IM-1.qxd
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Document Author:	Icom Inc.

INSTRUCTION MANUAL
COMMUNICATIONS RECEIVER
iR75
IMPORTANT
READ THIS INSTRUCTION MANUAL
CAREFULLY before attempting to operate the receiver.
SAVE THIS INSTRUCTION MANUAL. This
manual contains important safety and operating instructions for the IC-R75.
EXPLICIT DEFINITIONS
WORD
DEFINITION
R WARNING
Personal injury, fire hazard or electric
shock may occur.
CAUTION
NOTE
Equipment damage may occur.
If disregarded, inconvenience only.
No risk of personal injury, fire or
electric shock.
PRECAUTIONS
RNEVER apply AC to the [DC13.8V] jack on the receiver rear panel. This could cause a fire or ruin the receiver.
RNEVER apply more than 16 V DC, such as a 24 V
battery, to the [DC13.8V] jack on the receiver rear
panel. This could cause a fire or ruin the receiver.
RNEVER let metal, wire or other objects touch any
internal part or connectors on the rear panel of the receiver. This may result in an electric shock.
NEVER expose the receiver to rain, snow or any liquids.
AVOID using or placing the receiver 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 permanent damage to the receiver if left there for extended periods.
AVOID placing the receiver in excessively dusty environments or in direct sunlight.
AVOID placing the receiver against walls or putting
anything on top of the receiver. This will obstruct heat
dissipation.
Place unit in a secure place to avoid inadvertent use by children.
During mobile operation, DO NOT operate the receiver
without running the vehicle’s engine. When receiver
power is ON and your vehicle’s engine is OFF, the vehicle’s battery will soon become exhausted.
Make sure the receiver power is OFF before starting
the vehicle. This will avoid possible damage to the receiver by ignition voltage spikes.
SUPPLIED ACCESSORIES
The receiver comes with the following accessories.
Qty.
q AC adapter (AD-55/A/V)* ..................................... 1
w DC power cable (OPC-869)* ............................... 1
e Fuse (FGB 3 A; internal use) ............................... 1
r Fuse (FGB 3 A; for DC cable)* ............................ 2
* Either AC adapter + 1 fuse (q, e) or DC power cable + 3
fuses (w, e, r) are supplied depending on versions.
Versions of the IC-R75 which display the “CE” symbol on
the serial number seal comply with the European harmonised standard ETS300 684 (EMC product standard
for Commercially Available Amateur Radio Equipment).
TABLE OF CONTENTS
IMPORTANT .............................................................. i
EXPLICIT DEFINITIONS ........................................... i
PRECAUTIONS ......................................................... i
SUPPLIED ACCESSORIES ...................................... i
1 TABLE OF CONTENTS ....................................... 1
2 PANEL DESCRIPTION ................................... 2 – 6
■ Front panel ........................................................ 2
■ Function display ................................................. 5
■ Rear panel ......................................................... 6
3 INSTALLATION AND CONNECTIONS ......... 7 – 10
■ Grounding .......................................................... 7
■ Receiver stand ................................................... 7
■ Optional bracket and carrying handle ................ 7
■ Connections ...................................................... 8
■ Antenna connection ........................................... 9
■ Tape recorder connections ................................ 9
■ Transceive function ............................................ 9
■ FSK and AFSK (SSTV) connections ............... 10
■ Connecting to a PC ......................................... 10
4 FREQUENCY SETTING .............................. 11 – 13
■ Read me first ................................................... 11
■ Using the keypad ............................................. 11
■ Frequency setting ............................................ 12
■ Dial lock function ............................................. 13
5 RECEIVE FUNCTIONS ............................... 14 – 20
■ Mode selection ................................................ 14
■ Squelch and RF gain ....................................... 14
■ Twin PBT operation ......................................... 15
■ Noise blanker ................................................... 15
■ Preamp ............................................................ 16
■ Attenuator ........................................................ 16
■ AGC time constant .......................................... 16
■ Antenna selection ............................................ 16
■ CW reverse mode ............................................ 17
■ CW pitch control .............................................. 17
■ RTTY reverse mode ........................................ 17
■ Filter selection ................................................. 18
■ Filter set mode ................................................. 19
■ Optional noise reduction function .................... 20
■ Optional auto notch function ............................ 20
6 MEMORY OPERATION ............................... 21 – 24
■ Memory channels ............................................ 21
■ Memory channel selection ............................... 21
■ Memory channel programming ........................ 22
■ Frequency transferring .................................... 23
■ Memory names ................................................ 24
■ Memory clearing .............................................. 24
7 SCANS ........................................................ 25 – 27
■ Scan types ....................................................... 25
■ Preparation ...................................................... 25
■ Programmed scan operation ........................... 26
■ Memory/select memory scan operation .......... 26
■ Setting select memory channels ..................... 26
■ Priority watch operation ................................... 27
■ Auto memory write scan operation .................. 27
8 CLOCK AND TIMERS ................................. 28 – 29
■ Setting the current time ................................... 28
■ Setting power-on time ...................................... 28
■ Setting power-off time ...................................... 29
■ Setting sleep timer period ................................ 29
9 SET MODE .................................................. 30 – 33
■ Set mode description ....................................... 30
10 OPTION INSTALLATIONS ....................... 34 – 35
■ Opening the receiver’s case ............................ 34
■ CR-282 HIGH STABILITY CRYSTAL UNIT .......... 34
■ UT-102 VOICE SYNTHESIZER UNIT .................. 34
■ UT-106 DSP UNIT ............................................. 35
■ Optional IF filters ............................................. 35
11 MAINTENANCE ........................................ 36 – 37
■ Troubleshooting ............................................... 36
■ Resetting the CPU ........................................... 36
■ Fuse replacement ............................................ 37
■ Clock backup battery replacement .................. 37
12 SPECIFICATIONS ........................................... 38
13 OPTIONS ......................................................... 39
14 CONTROL COMMAND ............................ 40 – 43
■ Remote jack (CI-V) information ....................... 40
2
PANEL DESCRIPTION
■ Front panel
Speaker
Function display (p. 5)
!8
!7 !6
!5
COMMUNICATIONS RECEIVER
SSB CW/RTTY
AM
AF
RF/SQL
FM
ABC
DEF
GHI
JKL
MNO
PRS
TUV
WXY
QZ
ENT
MW
CLR
FIL
TS
V/M
TWIN PBT
ANT
SET
PHONES
SEL
POWER
CLOCK
P.AMP
ATT
NR
ANF
e r
NB
q POWER SWITCH [POWER]
➥ Push momentarily to turn power ON.
• Turn the optional DC power supply ON in advance.
SCAN
DN
AGC
!4
!3
!2
UP
LOCK
y u
i o
!0
!1
y CLOCK MODE SWITCH [CLOCK] (p. 28)
Toggles between frequency indication and clock indication when pushed.
➥ Push for 2 sec. to turn power OFF.
w HEADPHONE JACK [PHONES] (p. 8)
Accepts headphones.
• When headphones are connected, the internal speaker
or connected external speaker does not function.
e AF CONTROL [AF] (inner control)
Varies the audio output level from the speaker.
r RF GAIN/SQUELCH CONTROL [RF/SQL]
(outer control; pgs. 14, 30)
Adjusts the 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 squelch plus RF gain controls or squelch control only (RF gain is fixed at maximum) in set mode.
t PASSBAND TUNING CONTROLS [TWIN PBT]
(p. 15)
Adjust the receiver’s “passband width” of the 455
kHz and 9 kHz IF filters for the inner and outer controls, respectively.
• Set to the center positions when not in use.
u ANTENNA SELECTOR/SET MODE SWITCH
[ANT/SET] (pgs. 16, 30)
➥ While in a frequency indication, enters set mode
when pushed.
➥ While in a frequency indication, toggles between
the antenna 1 and 2 connectors when pushed for
2 sec.
➥ While in the clock indication, enters time setting
condition when pushed for 2 sec.
➥ While in a timer indication, toggles the timer ON
or OFF when pushed.
i TUNING DIAL
Changes the displayed frequency, selects set mode
items, etc.
o TUNING DIAL TENSION LATCH
Adjusts the tension of the tuning dial.
!0 LOCK/SPEECH SWITCH [LOCK] (pgs. 13, 34)
➥ Toggles the frequency lock function ON and OFF.
➥ Announces the selected readout frequency when
an optional UT-102 is installed and when pushed
for 2 sec.
PANEL DESCRIPTION
!1 MEMORY CHANNEL UP/DOWN SWITCHES
√ DN]/[UP ∫] (p. 21)
[√
➥ Select a memory channel.
➥ Select a set mode contents while in set mode.
➥ Select a timer or time indication while in clock indication.
➥ Select a filter set mode contents while in filter set
mode.
!7 FILTER SWITCH [FIL] (pgs. 18, 19)
➥ Push momentarily to toggle between the pre-programmed normal, wide and narrow IF filters for
the selected operating mode.
➥ Push for 2 sec. to enter filter set mode.
!2 MEMORY WRITE SWITCH [MW] (pgs. 22, 27)
➥ Stores the displayed frequency and operating
mode into the selected memory channel when
pushed for 2 sec.
➥ Toggles the programmed scan and auto memory
write scan when pushed.
• Push [SSB] to toggle between LSB and USB.
• Push [CW/RTTY] to toggle between CW and RTTY.
• Push [CW/RTTY] for 2 sec. to toggle between CW and
CW reverse or RTTY and RTTY reverse.
• Push [AM] to toggle between AM and S-AM.
• Push [FM] to select FM.
!8 MODE SWITCHES [SSB]/[CW/RTTY]/[AM]/[FM]
(p. 14)
Select an operating mode.
!3 CLEAR SWITCH [CLR] (p. 24)
➥ Clears the input digits while inputting a frequency
or memory channel number.
➥ Clears the selected memory channel contents
when pushed for 2 sec. in memory mode.
• This switch does not function in VFO mode.
!4 VFO/MEMORY SWITCH [V/M] (pgs. 21, 23)
➥ Toggles the operating mode between VFO mode
and memory mode when pushed.
➥ Selects a memory channel for inputting a memory channel number when pushed.
➥ Transfers the memory contents to VFO when
pushed for 2 sec.
!5 KEYPAD (pgs. 11, 21)
The keypad can be used for several functions as
below:
• Keypad then [ENT]
— Direct frequency input.
• Keypad then [V/M]
— Memory channel selection.
• [ENT] then keypad in memory name indication
mode
— Alphanumeric input for memory name, etc.
!6 QUICK TUNING STEP SWITCH [TS] (pgs. 12, 13)
➥ Selects a quick tuning step or turns the quick tuning step OFF.
• While the quick tuning indicator (6) is displayed, the
frequency can be changed in kHz or MHz steps.
➥ While the quick tuning step is OFF, turns the 1 Hz
step ON and OFF when pushed for 2 sec.
• 1 Hz indication appears and the frequency can be
changed in 1 Hz steps.
➥ While the kHz quick tuning step is selected, enters tuning step set mode when pushed for 2 sec.
➥ While the memory name indication is selected in
memory mode, pushing this switch shows the operating frequency; and rotating the tuning dial
while pushing this switch changes the frequency
temporally.
2
PANEL DESCRIPTION
■ Front panel (continued)
Function display (p. 5)
COMMUNICATIONS RECEIVER
SSB CW/RTTY
AM
AF
RF/SQL
FM
ABC
DEF
GHI
JKL
MNO
PRS
TUV
WXY
QZ
ENT
MW
CLR
FIL
TS
V/M
TWIN PBT
ANT
SET
PHONES
SEL
POWER
CLOCK
P.AMP
ATT
NR
ANF
NB
AGC
!9
@0
@1
@2
@3
@4
!9 PREAMP SWITCH [P.AMP] (p. 16)
Push to toggle between preamp-1 and preamp-2 or
turn the preamp OFF.
@0 ATTENUATOR SWITCH [ATT] (p. 16)
Push to toggle the 20 dB attenuator function ON
and OFF.
@1 NOISE REDUCTION SWITCH [NR] (p. 20)
➥ Toggles the optional noise reduction function ON
and OFF when pushed. Functions in SSB, CW
and RTTY modes. An optional UT-106 DSP UNIT is
required.
➥ Enters noise reduction level set mode when
pushed for 2 sec. An optional UT-106 DSP UNIT is
required.
@2 AUTOMATIC NOTCH FILTER SWITCH [ANF]
(p. 20)
Push to turn the optional automatic notch filter for
receiving AM signals ON and OFF. An optional
UT-106 DSP UNIT is required.
@3 NOISE BLANKER SWITCH [NB] (p. 15)
Toggles the noise blanker ON and OFF. The noise
blanker reduces pulse-type noise such as that generated by automobile ignition systems. This function
is not effective for FM, or non pulse-type noise.
DN
SCAN
UP
@6
@5
LOCK
@4 AGC SWITCH [AGC] (p. 16)
➥ Toggles the AGC (Automatic Gain Control) time
constant fast and slow when pushed.
➥ Toggles the AGC function ON and OFF when
pushed for 2 sec.
@5 SELECT SWITCH [SEL] (pgs. 24, 26)
➥ Toggles the select memory setting ON and OFF
when pushed in memory mode.
➥ Toggles the memory name indication ON and
OFF when pushed for 2 sec. in memory mode.
@6 SCAN SWITCH [SCAN] (p. 25)
➥ Push momentarily to start/stop the programmed
scan in VFO mode.
➥ Push momentarily to start/stop the memory scan
in memory mode.
➥ Push for 2 sec. to start the priority watch in VFO
mode.
• Push [SCAN] again to cancel the priority watch.
PANEL DESCRIPTION
■ Function display
@1
@0
!9
!8
REV LSBUSBCW S-AMFM RTTY R X
TIMER
DSP
!7
ANF
NR
LOCK
S1
PREAMP 1 2
ATT
20
ANT 1 2
40
q TIMER INDICATOR (p. 28)
Appears when power on/off timer or sleep timer is
in use.
w DSP UNIT INDICATOR (p. 35)
Appears when an optional UT-106
stalled.
DSP UNIT
is in-
e AUTOMATIC NOTCH FILTER INDICATOR (p. 20)
Appears when the optional automatic notch filter is
in use.
r NOISE REDUCTION INDICATOR (p. 20)
Appears when the optional noise reduction function
is in use.
t LOCK INDICATOR (p. 13)
Appears when the dial lock function is in use.
y SIGNAL METER
➥ Shows the relative receive signal strength.
➥ Shows the S-meter squelch level when used.
u PREAMP INDICATOR (p. 16)
Appears when antenna preamp-1 or preamp-2 is in
use.
F.AGC OFF
60dB
!6
BLANK
N B VFO
SCAN MEMO
!5
!0 !1 !2 !3 !4
!2 AGC INDICATORS (p. 16)
➥ “AGC” appears when slow AGC time constant is
selected.
➥ “F.AGC” appears when fast AGC time constant is
selected.
➥ “AGC OFF” appears when the AGC function is
turned OFF.
➥ “F.AGC” blinks while scanning or while using
band scope via an optional RS-R75.
!3 MEMORY MODE INDICATOR (p. 21)
Indicates memory mode is selected.
!4 VFO MODE INDICATOR
Indicates VFO mode is selected.
!5 MEMORY CHANNEL NUMBER READOUT
(p. 21)
➥ Shows the selected memory channel number.
➥ “S” appears when the displayed memory channel
is designated as a select memory channel.
!6 BLANK MEMORY INDICATOR
Shows that the displayed memory channel is not
programmed.
• This indicator appears both in VFO and memory modes.
!7 FREQUENCY READOUT
Shows the operating frequency.
i ATTENUATOR INDICATOR (p. 16)
Appears when the attenuator function is in use.
!8 RECEIVE INDICATOR
Appears while receiving a signal or when the
squelch is open.
o ANTENNA INDICATORS (p. 16)
Indicate which antenna connector is in use.
!9 MODE INDICATORS (p. 14)
Indicate the selected operating mode.
!0 NOISE BLANKER INDICATOR (p. 15)
Appears when the noise blanker function is in use.
@0 REVERSE MODE INDICATOR (p. 17)
Indicates a reverse operating mode is selected.
!1 SCAN INDICATOR (p. 25)
➥ Appears when scan or priority watch is activated.
➥ Flashes when scan or priority watch is paused.
@1 WIDE/NARROW FILTER INDICATORS (p. 18)
➥ “ç” appears when the wide IF filter is selected.
➥ “ã” appears when the narrow IF filter is selected.
2
PANEL DESCRIPTION
■ Rear panel
q RECORDER REMOTE JACK [REC REMOTE]
Controls the running of a tape recorder for recording. Connects to the REMOTE jack on a tape
recorder.
• This function can be turned OFF in set mode. (p. 32)
w RECORDER JACK [REC]
Outputs receive audio signals. Connects to the AUX
or LINE IN jack on a tape recorder.
e RS-232C CONNECTOR [RS-232C]
Connects an RS-232C cable. An RS-232C cable
can be used to connect the receiver to a PC. In this
way commands can be sent to the receiver via the
PC.
r CI-V REMOTE CONTROL JACK [REMOTE]
Allows connection to an Icom CI-V system transceiver or another receiver for the transceive function. Also connects to a PC with several receivers
for command control via an optional CT-17 CI-V
LEVEL CONVERTER.
t EXTERNAL SPEAKER JACK [EXT SP]
Connects an 8 Ω external speaker, if desired.
• When an external speaker is connected, the internal
speaker does not function.
y MUTE CONTROL JACK [MUTE]
Mutes audio outputs and attenuates the receive signal input when grounded. Used for CI-V transceive
operation with a transceiver.
r t
u i
!0
u GROUND TERMINAL [GND] (p. 7)
Connects the black terminal to ground.
i ANTENNA 2 TERMINAL [ANT 2] (p. 9)
Connects the red terminal to a 500 Ω long wire antenna.
o ANTENNA 1 CONNECTOR [ANT 1] (p. 9)
Connects a 50 Ω antenna with a PL-259 connector
and a 50 Ω coaxial cable.
!0 DC POWER JACK [DC 13.8V] (p. 8)
➥ Connects the supplied AC adapter for versions
with an AC adapter.
➥ Connects to a 13.8 V DC power source using the
supplied DC cable for versions without an AC
adapter.
• Current of 1.5 A or greater is required.
DO NOT use a cigarette lighter socket as a
power source when operating in a vehicle. The
plug may cause voltage drops and ignition noise
may be superimposed onto received audio.
INSTALLATION AND CONNECTIONS
■ Grounding
To prevent accidents involving electricity and interference from transceivers, ground the receiver through
the [GND] terminal on the rear panel.
For best results, connect a heavy gauge wire or strap
to a long earth-sunk copper rod. Make the distance between the [GND] terminal and ground as short as possible.
R WARNING: NEVER connect the [GND]
terminal to a gas or electric pipe, since the connection could cause an explosion or electric shock.
■ Optional bracket and
carrying handle
D Mounting bracket
An optional IC-MB5 MOBILE MOUNTING BRACKET is available to install the radio under a table, on a wall, in a
vehicle, etc.
Select an area to mount the receiver keeping in mind
that the weight of the receiver is approx. 3 kg.
Flat washer
■ Receiver stand
The base of the receiver has an adjustable stand for
desktop use. Set the stand to one of two angles depending on your operating conditions.
D Carrying handle
An optional handle allows you to easily carry and
transport the receiver.
Attach the MB-23 CARRYING HANDLE with the supplied
rubber feet as shown.
3
INSTALLATION AND CONNECTIONS
■ Connections
COMMUNICATIONS RECEIVER
HEADPHONES
SSB CW/RTTY
FIL
AM
TS
FM
ABC
DEF
JKL
MNO
PRS
TUV
WXY
ENT
AF
RF/SQL
V/M
TWIN PBT
MW
CLR
ANT
SET
PHONES
SEL
POWER
CLOCK
P.AMP
REMOTE (p. 9, 32)
Used for computer control and transceive.
ATT
NR
ANF
NB
AGC
ANTENNA 2
Connect a long wire
antenna; impedance: 500 Ω.
DN
SCAN
UP
LOCK
ANTENNA 1 (p. 9)
Connect a Yagi antenna;
impedance: 50 Ω.
MUTE CONTROL
JACK (p. 6)
RECORDER/
RECORDER
CONTROL (p. 9)
RS-232C JACK (p. 10)
EXTERNAL
SPEAKER (p. 39)
SP-21
GROUND (p. 7)
DC13.8V JACK
AD-55/A/V or
OPC-869
INSTALLATION AND CONNECTIONS
■ Antenna connection
Antennas play a very important role in receiver operation. Connecting a poor quality antenna to the receiver
will result in less than optimum performance.
When using a 50 Ω antenna, use [ANT 1] connector for
connection. When using a 500 Ω long wire antenna,
use [ANT 2] terminal for connection.
PL-259 CONNECTOR INSTALLATION EXAMPLE
30 mm
Coupling ring
Slide the coupling ring
down. Strip the cable
jacket and soft solder.
solder solder
Slide the connector
body on and solder it.
10 mm (soft solder)
10 mm
Strip the cable as
shown at left. Soft
solder the center conductor.
Soft
solder
1–2 mm
Screw the coupling ring
onto the connector
body.
(10 mm ≈ 3⁄8 in)
■ Tape recorder connections
The [REC OUT] jack has 350 mV rms/4.7 kΩ output
for connection to other audio equipment.
IC-R75
[REC REMOTE] jack: Grounds when a signal is
received and squelch opens. If a tape recorder
has a control terminal, this jack can be used for
recording control. (1 A/DC max.)
[AUX IN] or
[LINE IN] jack
[REC
REMOTE]
[REC OUT]
350 mVrms
4.7 kΩ
■ Transceive function
Icom CI-V transceivers or receivers can be connected
via the [REMOTE] jack. The frequency and mode become the same* when either radio is changed.
* When a set frequency is out-of-range for one of the connected transceivers or receivers, the connected radio’s frequency/mode does not change.
IC-R75
Icom CI-V transceiver/receiver
[REMOTE]
Connect to [REMOTE] jack
Be sure the “CIV TRn” item is turned ON in set mode (p. 32).
3
INSTALLATION AND CONNECTIONS
■ FSK and AFSK (SSTV) connections
To connect a terminal unit, TNC or scan converter,
refer to the diagram below.
q Connect a terminal unit as below.
w Select RTTY mode (or USB, CW modes for HF
band data communications).
e Set the receiver to the desired frequency as at
right.
r Set the connected terminal unit to the appropriate
settings.
• Refer to the terminal unit’s instructions.
The optional 250 Hz CW narrow filters may not
pass RTTY signals. Be sure to select the appropriate IF filters corresponding to the signal width.
(pgs. 18, 19)
to [REC
REMOTE]
Frequency settings depend on the mode used.
FM mode:
[Setting frequency (displayed freq.)] = [Desired
freq.]
USB mode:
[Setting frequency (displayed freq.)] = [Desired
freq.] – [Center of Mark and Space freq.]
CW narrow mode:
[Setting frequency (displayed freq.)] = [Desired
freq.] – [Center of Mark and Space freq.] + [600 Hz]
LSB mode (for amateur RTTY):
[Setting frequency (displayed freq.)] = [Desired
freq.] + [Mark freq.]
to [REC]
AF IN
2-conductor 3.5(d) plugs
TU or TNC
Personal computer
SQUELCH IN
■ Connecting to a PC
The RS-R75 remote control software is available to
perform data setting and remote control of the receiver.
Refer to the diagram below for connection.
D System requirements
To use this program, the following hardware and software are required:
• IBM PC compatible computer
• An RS-232C serial port
• Microsoft® Windows® 95 or Microsoft® Windows® 98
• Intel i486DX4 processor or faster (Pentium® 100
MHz or faster recommended)
• At least 16 MB RAM
• At least 10 MB of hard disk space
• At least 640 × 480 pixel, high color (16 bit) display
Supplied RS-232C cable (OPC-743)
Personal computer
10
IC-R75
FREQUENCY SETTING
■ Read me first
The receiver uses memory channels for storage of frequencies (as well as mode, tuning steps, etc.). When
turning power OFF or changing memory channels, the
previously displayed frequency cannot be recalled unless it has been stored into a memory channel.
USB
20
See p. 22 for details.
RX
ANT 1
S1
Therefore, when you want to keep a displayed frequency for later recall, you must program it into a
memory channel by pushing [MW] for 2 sec.
40
AGC
60dB
BLANK
VF O
“BLANK” appears above the memory channel
readout until [MW] is pushed for 2 sec.
Push [MW] for 2 sec. after tuning.
■ Using the keypad
q Push the numeral keys on the keypad to enter the
MHz digits for the desired frequency.
e Push the numeral keys to enter the frequency digits
below 1 MHz.
• If a key is mistakenly pushed, push [CLR] and start
again from the beginning.
• When entering the same MHz digits as the displayed
frequency, this step can be skipped.
• If a key is mistakenly pushed, push [CLR] and start
again from the beginning.
r Push [ENT] to set the input frequency.
• When pushing [ENT] after entering the MHz digits, zeros
are automatically entered for the kHz digits.
w Push [•] on the keypad.
[EXAMPLE]: Setting the frequency using the keypad.
•To set to 28.00 MHz
USB
•To set to 21.050 MHz
USB
ABC
TUV
USB
RX
ABC
ENT
USB
RX
USB
RX
RX
QZ
USB
RX
JKL
RX
ENT
USB
RX
USB
RX
USB
RX
•To set to 850 kHz (0.850 MHz)
QZ
USB
RX
TUV
USB
•To change 14.19075 to 14.850 MHz
USB
RX
JKL
RX
ENT
USB
RX
TUV
USB
JKL
RX
ENT
USB
RX
11
4
FREQUENCY SETTING
■ Frequency setting
Rotate the tuning dial to change the frequency.
• The frequency changes in increments determined by the
selected tuning step (see below).
• When the lock function is activated (“LOCK” appears), the
frequency cannot be changed via tuning dial.
Push [TS] one or more times to select a quick tuning
step.
D Programmable tuning steps
Programmable tuning steps are available to suit your
operating requirements.
These tuning steps are:
• Independently selectable for each mode
• Selectable from 0.1, 1, 5, 6.25, 9, 10, 12.5, 20, 25,
100 kHz
q Select the desired operating mode with [SSB],
[CW/RTTY], [AM] or [FM]. (p. 14)
w Push [TS] one or more times until the programmable tuning step indicator, “6,” appears above the 1
kHz.
[TS]
USB
RX
ANT 1
S1
20
40
AGC
60dB
Programmable tuning
step indicator
BLANK
VFO
• Rotating the tuning dial changes the frequency according to the set tuning step.
e Push [TS] for 2 sec. while the programmable tuning step indicator appears to enter the tuning step
set mode.
r Rotate the tuning dial to set the desired tuning step
for the selected mode.
t Push [TS] to exit the tuning step set mode.
y Rotate the tuning dial to change the frequency according to the set tuning step.
10 kHz tuning step is
selected.
D 1 Hz and 10 Hz tuning steps
When both the 1 MHz tuning step and programmable
tuning step, “6,” disappear, rotating the tuning dial
changes the frequency in increments of 1 or 10 Hz.
USB
RX
ANT 1
S1
q Push [TS] one or more times until the programmable tuning step indicator or 1 MHz tuning step indicator, “6,” disappears.
w Push [TS] for 2 sec. to toggle between the 1 and
10 Hz step settings.
• When the 1 Hz step is selected, the 1 Hz digit appears
in the frequency indication; when the 10 Hz step is selected, the 1 Hz digit disappears from the frequency indication.
12
20
40
AGC
60dB
BLANK
VFO
Rotating the tuning dial
changes the frequency
in 10 Hz steps.
TS
Push
for 2 sec.
USB
RX
ANT 1
S1
20
40
60dB
AGC
BLANK
VFO
Rotating the tuning dial
changes the frequency
in 1 Hz steps.
FREQUENCY SETTING
D 1 MHz quick tuning step
The quick tuning step function allows you to change
the frequency in 1 MHz steps when rotating the tuning dial.
Quick tuning step
indicator
USB
Push [TS] one or more times until the 1 MHz tuning
step indicator, “6,” appears above the 1 MHz indicator.
RX
ANT 1
S1
20
40
60dB
AGC
BLANK
VFO
[TS] SWITCH FLOW CHART
Programmable step tuning
(100 Hz –100 kHz)
10 Hz tuning
USB
USB
RX
momentarily
2 sec.
1 MHz tuning
USB
RX
2 sec.
RX
momentarily
momentarily
2 sec.
USB
RX
1 Hz tuning
Selectable for each mode.
■ Dial lock function
The dial lock function prevents accidental changes
caused by the tuning dial. The lock function electronically locks the dial.
Push [LOCK] momentarily to toggle the lock function
ON and OFF.
• “LOCK” appears in the function display while the lock function is activated.
USB
RX
[LOCK]
LOCK
S1
ANT 1
20
40
60dB
AGC
BLANK
VFO
“LOCK” appears while the lock
function is activated.
13
5
RECEIVE FUNCTIONS
■ Mode selection
The following modes are available in the IC-R75:
SSB (LSB/USB), CW, CW REV (CW reverse), FM,
AM, S-AM (Synchronous detection AM), RTTY and
RTTY REV (RTTY reverse).
OPERATING MODE SELECTION
CW/RTTY
CW
RTTY
CW REV
RTTY REV
SSB
➥ Push [SSB] to toggle between LSB and USB.
➥ Push [CW/RTTY] momentarily to toggle between
CW and RTTY.
➥ Push [CW/RTTY] for 2 sec. to toggle between CW
and CW reverse or RTTY and RTTY reverse.
➥ Push [AM] to toggle between AM and S-AM.
• “S-” blinks when automatic mode selection between
S-AM and AM modes is in use. This can be set in set
mode. (p. 31)
➥ Push [FM] to select FM.
LSB
USB
AM
AM
S-AM
FM
Push
momentarily
FM
Push mode switch
for 2 sec.
Push mode switch
momentarily.
The selected mode is indicated in the function display.
■ Squelch and RF gain
The receiver uses the same control, [RF/SQL], to adjust one of either the RF gain or the squelch.
[RF/SQL] adjusts either the RF gain or the squelch
depending on the operating mode selected and the
condition of the RF/SQL item in set mode (p. 30).
too deep.
• A segment appears in the S-meter to indicate the S-meter
squelch level.
• When set as the [RF/SQL] control
• [RF/SQL] control priority
Set mode
setting
Recommended level
USB, LSB,
CW, RTTY
AM, S-AM, FM
Sq (SQL)
SQL*
SQL*
At (AUTO)
RF GAIN
SQL*
rS (RF/SQL)
RF/SQL
RF/SQL
* The RF gain is set to maximum level when the [RF/SQL]
is set as [SQL] control.
The RF (Radio Frequency) gain is used to adjust the
receiver gain.
• Shallow rotation moves the S-meter to the right indicating
the signal strength which can be received.
The recommended position for RF gain is the 12
o’clock position since this sets RF gain to the max.
14
Noise squelch (FM mode)
Squelch is open.
Maximum RF gain
RF gain adjustable
range
S-meter squelch
• When set as the [SQL] control
Noise squelch (FM mode)
Noise squelch threshold
(FM mode)
S-meter squelch
threshold
Squelch is open.
Shallow
S-meter squelch
Deep
• When set as the [RF] control
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 the other modes.
Maximum RF gain
• When operating in FM, first rotate the control fully counterclockwise. Then, rotate the control clockwise to the point
where the noise just disappears. This is the best position.
The squelch does not open for weak signals when it is set
Minimum RF gain
Adjustable range
RECEIVE FUNCTIONS
■ Twin PBT operation
The twin PBT (Passband Tuning) function electronically narrows the IF passband widths to reduce interference. Moving both [TWIN PBT] controls to the
same position shifts the IF.
• [TWIN PBT] should normally be set to the center
positions when there is no interference.
• When PBT is used, the audio tone may be
changed.
• PBT may not function with some IF filter combinations.
• Not available for FM mode.
Variable range depends on the filter selection. ±1.29
kHz in 15 Hz steps and ±258 kHz in 3 Hz steps are
available.
PBT OPERATION EXAMPLE
Both controls at
center position
Cutting a lower
passband
Cutting both higher and
lower passbands
TWIN PBT
TWIN PBT
TWIN PBT
Passband
Passband
IF center frequency
Interference
Desired signal
Interference
Interference
Desired signal
■ Noise blanker
The noise blanker eliminates pulse-type noise such
as from car ignitions. The noise blanker is not available for FM mode.
➥ Push the [NB] switch to turn the noise blanker ON
or OFF.
• When using the noise blanker, received signals
may be distorted if they are excessively strong.
• The noise blanker function in AM mode can be
deactivated depending on set mode setting. (p.
31)
[NB]
15
5
RECEIVE FUNCTIONS
■ Preamp
The preamp amplifies received signals in the front
end circuit to improve the S/N ratio and sensitivity.
Turn this function ON when receiving weak signals.
USB
PREAMP 1
S1
➥ Push [P.AMP] to toggle between preamp-1 and
preamp-2 or turn the preamp OFF.
RX
ANT 1
20
40
AGC
60dB
BLANK
VFO
“PREAMP” appears while the
preamp is activated.
■ Attenuator
The attenuator prevents desired signals from distorting when very strong signals are near the desired frequency or when very strong electric fields, such as
from broadcasting stations, are near your location.
➥ Push [ATT] toggle the 20 dB attenuator function
ON and OFF.
• “ATT” appears when the attenuator is turned ON.
USB
ATT
S1
ANT 1
20
RX
40
AGC
60dB
BLANK
VFO
“ATT” appears while the attenuator
is activated.
■ AGC time constant
The AGC (Automatic Gain Control) controls receiver
gain to produce a constant audio output level even
when the received signal strength is varied by fading,
etc. Use AGC slow for normal phone operation; AGC
fast for receiving data and searching for signals.
➥ Push [AGC] momentary to toggle the AGC time
constant between fast and slow.
USB
RX
ANT 1
S1
20
40
F. AGC
60dB
BLANK
VFO
“F.AGC” appears when the fast time
constant is selected.
• “F.AGC” appears when the fast time constant is selected.
• “AGC” appears when the slow time constant is selected.
➥ Push [AGC] for 2 sec. to turn the AGC circuit OFF.
• “AGC OFF” appears when the AGC circuit is turned
OFF.
• Push [AGC] to turn the AGC circuit ON.
■ Antenna selection
2 types of antenna can be connected to this receiver.
When 2 antennas are connected, select an antenna
depending on the operating condition.
USB
RX
ANT 1
S1
➥ Push [ANT(SET)] for 2 sec. to toggle between the
antenna 1 and 2 connectors.
• If a blank memory channel has been selected, push
[V/M] to select VFO mode in advance.
16
20
40
60dB
AGC
BLANK
VFO
“ANT1” appears when the
[ANT1] connector is in use.
RECEIVE FUNCTIONS
■ CW reverse mode
CW-R (CW Reverse) mode receives CW signals with
a reverse side CW carrier point like that of LSB and
USB modes.
• Receive audio tone response
1/3 octave
Use when interfering signals are near a desired signal
and you want to change the interference tone.
BFO
1/2 octave
Push for 2 sec.
BFO
CW/RTTY
q Push [CW/RTTY] once or twice to select CW
mode.
w Push [CW/RTTY] for 2 sec. to toggle between CW
and CW reverse (CW REV).
• Check the interfering tone.
Desired signal Interference
(600 Hz)
(800 Hz)
CW mode (USB side)
Desired signal Interference
(600 Hz)
(400 Hz)
CW REV mode (LSB side)
■ CW pitch control
The received CW audio pitch and monitored CW
audio can be adjusted to suit your preferences (300
to 900 Hz) without changing the operating frequency.
The received CW audio pitch can be adjusted in 10
Hz steps.
q Push [(ANT) SET] momentarily to enter set mode.
w Push [UP Y] or [Z DN] to select the ‘CW PITCH’
item.
e Rotate the tuning dial to set the desired CW audio
pitch.
Shows a 600 Hz CW audio pitch
• CW audio pitch is displayed in 10 Hz steps. ‘60’ indicates 600 Hz CW audio pitch.
r Push [(ANT) SET] again to exit set mode.
■ RTTY reverse mode
Received characters are occasionally garbled when
the receive signal is reversed between MARK and
SPACE. This reversal can be caused by incorrect TNC
connections, settings, commands, etc.
q Push [CW/RTTY] once or twice to select RTTY
mode.
w Push [CW/RTTY] for 2 sec. to toggle between
RTTY and RTTY reverse (RTTY REV).
• Check the receive signal.
To receive a reversed RTTY signal correctly, select
RTTY reverse mode.
17
5
RECEIVE FUNCTIONS
■ Filter selection
The filter selection switches the IF passband width as
shown in the table at right.
IF
The filter selection is automatically memorized in
each mode.
q Select the desired mode with the mode switches.
w Push [FIL] one or more times to select the desired
filter combination.
9 MHz
• ã or ç does not appear while in normal IF filter.
• ç appears when wide IF filters are selected.
• ã appears when narrow IF filters are selected.
Filter
Passband
width
FL-100
500 Hz/–6 dB
CW-N, RTTY-N
FL-101
250 Hz/–6 dB
CW-N
FL-103
2.8 kHz/–6 dB SSB-W
FL-223
1.9 kHz/–6 dB SSB-N
FL-232
350 Hz/–6 dB
CW-N, RTTY-N
FL-52A
500 Hz/–6 dB
CW-N, RTTY-N
250 Hz/–6 dB
CW-N
FL-53A
455 kHz
When an optional filter is installed, set the optional
filter in filter set mode. Optional filters are not selected by default.
Recommended
selectivity
FL-96
2.8 kHz/–6 dB SSB-W
FL-222
1.8 kHz/–6 dB SSB-N
FL-257
3.3 kHz/–6 dB SSB-W
• Filter construction
9 MHz IF filter
FL-23 (15 kHz)
2nd IF signal
FL-272 (2.4 kHz)
455 kHz IF filter
Mixer
CFWS450E (15 kHz)
CFWS450HT (6 kHz)
FL-65 (2.4 kHz)
FL-103 (2.8 kHz)
FL-223 (1.9 kHz)
FL-100 (500 Hz)
FL-232 (350 Hz)
FL-101 (250 Hz)
optional
18
FL-257 (3.3 kHz)
FL-96 (2.8 kHz)
FL-222 (1.8 kHz)
FL-52A (500 Hz)
FL-53A (250 Hz)
optional
3rd IF signal
RECEIVE FUNCTIONS
■ Filter set mode
When an optional filter is installed, set the optional filters in filter set mode. Optional filters are not selected
by default.
•9 MHz normal filter selection
USB
D Optional filter setting
q Push [FIL] for 2 sec. to enter filter set mode.
• If a blank memory channel has been selected, push
[V/M] to select VFO mode in advance.
w Push [UP Y] or [Z DN] one or more times until
“oP1” appears for 9 MHz IF filter setting or “oP2”
appears for 455 kHz IF filter setting.
e Rotate the tuning dial to select the installed filter.
• “No,” “100,” “101,” “103,” “223” and “232” indicate no optional filter, FL-100, FL-101, FL-103, FL-223 and
FL-232, respectively for 9 MHz IF filter selection.
• “No,” “52A,” “53A,” “96,” “222” and “257” indicate no optional filter, FL-52A, FL-53A, FL-96, FL-222 and
FL-257, respectively for 455 kHz IF filter selection.
•455 kHz normal filter selection
USB
•9 MHz narrow filter selection
USB
•455 kHz narrow filter selection*
USB
r Push [FIL] to exit filter set mode.
D Wide/narrow filter setting
q Push [FIL] for 2 sec. to enter filter set mode.
•9 MHz wide filter selection
USB
• If a blank memory channel has been selected, push
[V/M] to select VFO mode in advance.
w Select the desired mode with the mode switches.
e Push [UP Y] or [Z DN] one or more times to select
the desired width 9 MHz or 455 kHz IF filter.
• Wide or narrow mode can be deactivated when 9 MHz
wide or narrow filter is set to ‘OFF.’
• 455 kHz wide or narrow filter selection does appear
when 9 MHz wide or narrow filter is set to ‘OFF.’
r Rotate the tuning dial to select a filter.
t Repeat steps w and r to select IF filters for other
modes, if desired.
• The filter combinations are stored depending on operating modes.
•455 kHz wide filter selection*
USB
•Expanded filter selection ON/OFF
USB
•9 MHz normal filter selection
USB
y Push [FIL] to exit filter set mode.
D Expanded filter selection ON/OFF
The selectable filter combinations can be expanded
by setting the expanded filter selection to ON.
•455 kHz normal filter selection
USB
q Push [FIL] for 2 sec. to enter filter set mode.
• If a blank memory channel has been selected, push
[V/M] to select VFO mode in advance.
w Push [UP Y] or [Z DN] one or more times until
“EXP” appears.
e Rotate the tuning dial to turn the expanded filter
selection ON/OFF.
* 455 kHz wide or narrow filter selection does appear when 9 MHz wide or narrow filter is set to
‘OFF.’
• If ‘ON’ is selected, the expanded filter selection can be
used.
r Push [FIL] to exit filter set mode.
19
5
RECEIVE FUNCTIONS
■ Optional noise reduction function
When an optional UT-106 is installed (DSP appears
in the function display), noise reduction function can
be used.
The noise reduction function reduces noise components and picks out desired signals which are buried
in noise. The received AF signals are converted to
digital signals and then the desired signals are separated from the noise.
optional UT-106
• Noise reduction example
Noise reduction OFF
Noise components
Noise reduction activated
Desired
signal (CW)
q Push [NR] to turn the noise reduction ON.
• [NR] indicator appears.
w Push [NR] for 2 sec. to enter the noise reduction
level setting condition.
Greater setting of the [NR] level results in audio
signal masking or distortion. Set the [NR] level for
maximum readability. The noise reduction function
is not available in AM and FM modes.
e Rotate the tuning dial to adjust the noise reduction
level.
r Push [NR] to exit the setting condition.
t Push [NR] again to turn the noise reduction OFF.
• [NR] indicator disappears.
■ Optional auto notch function
When an optional UT-106 is installed (DSP appears
in the function display), an auto notch function can be
used.
optional UT-106
Auto notch OFF
The function automatically attenuates more than 3
beat tones, tuning signals, etc., even if they are moving.
Auto notch ON
Desired
signal (AF)
Desired
signal (AF)
The auto notch functions in SSB mode only.
q Select SSB mode.
w Push [ANF] to turn the auto notch function ON.
• [ANF] indicator appears.
e Push [ANF] again to cancel the function.
• [ANF] indicator disappears.
20
Unwanted tone
frequency
Particular frequency
is attenuated
6
MEMORY OPERATION
■ Memory channels
The receiver has 101 memory channels. The memory
mode is very useful for quickly changing to often-used
frequencies.
All 101 memory channels are tuneable which means
the programmed frequency can be tuned temporarily
with the tuning dial, etc. in memory mode.
MEMORY
CHANNEL
MEMORY
CHANNEL
NUMBER
CAPABILITY
TRANSFER
TO VFO
OVERWRITING
CLEAR
Regular memory
channels
1–99
One frequency and one mode in
each memory channel.
Yes
Yes
Yes
Scan edge
memory
channels
P1, P2
One frequency and one mode in
each memory channel as scan
edges for programmed scan.
Yes
Yes
No
■ Memory channel selection
D Using the [UP Y] or [Z DN] keys
D Using the keypad
q Push [V/M] to select memory mode.
q Push [V/M] to select memory mode.
• “MEMO” appears.
• “MEMO” appears.
w Push [UP Y] or [Z DN] several times to select the
desired memory channel.
w Push the desired memory channel number using
the keypad.
• Push and hold [UP Y] or [Z DN] for continuous selection.
• Enter 100 or 101 to select scan edge channel P1 or P2,
respectively.
e To return to VFO mode, push [V/M] again.
USB
20
40
USB
RX
ANT 1
S1
e Push [V/M] to select the desired memory channel.
r To return to VFO mode, push [V/M] again.
AGC
60dB
ANT 1
S1
VFO
V/M
20
40
AGC
60dB
VFO
20
40
USB
RX
ANT 1
V/M
USB
S1
RX
AGC
RX
ANT 1
S1
60dB
20
40
AGC
60dB
MEMO
or
UP
20
40
ABC
AGC
MEMO
V/M
RX
ANT 1
S1
60dB
USB
RX
ANT 1
DN
USB
S1
MEMO
20
40
AGC
60dB
MEMO
21
6
MEMORY OPERATION
■ Memory channel programming
Memory channel programming can be preformed either in VFO mode or in memory mode.
D Programming in VFO mode
q Set the desired frequency and operating mode in
VFO mode.
w Push [UP Y] or [Z DN] several times to select the
desired memory channel.
[EXAMPLE]: Programming 7.088 MHz/LSB into
memory channel 12.
USB
ANT 1
S1
• “BLANK” appears if the selected memory channel is a
blank channel (and does not have contents).
20
40
AGC
60dB
VFO
SSB
e Push [MW] for 2 sec. to program the displayed frequency and operating mode into the memory
channel.
• Preamp setting, attenuator on/off, antenna selection,
and AGC setting can also be programmed into a memory channel.
RX
or keypad
LSB
RX
ANT 1
S1
20
40
AGC
60dB
VFO
or
UP
DN
LSB
RX
ANT 1
S1
20
40
AGC
60dB
BLANK
VFO
Beep
Beep
Beep
MW
LSB
RX
ANT 1
S1
D Programming in memory mode
20
40
AGC
60dB
VFO
[EXAMPLE]: Programming 21.280 MHz/CW into
memory channel 18.
q Select the desired memory channel with [UP Y] or
[Z DN] in memory mode.
• “BLANK” appears if the selected memory channel is a
blank channel (and does not have contents).
Push for 2 sec.
USB
RX
ANT 1
S1
w Set the desired frequency and operating mode in
memory mode.
20
40
AGC
60dB
VFO
then
V/M
UP
or
DN
• To program a blank channel, use direct frequency entry
with the keypad in advance.
e Push [MW] for 2 sec. to program the displayed frequency and operating mode into the memory
channel.
BLANK
S1
20
40
60dB
MEMO
• Preamp setting, attenuator on/off, antenna selection,
and AGC setting can also be programmed into a memory channel.
keypad
then
CW
ANT 1
S1
20
40
CW/RTTY
RX
AGC
BLANK
60dB
MEMO
Beep
Beep
Beep
MW
CW
ANT 1
S1
20
40
RX
AGC
60dB
MEMO
22
Push for 2 sec.
MEMORY OPERATION
■ Frequency transferring
The frequency and operating mode in a memory channel can be transferred to the VFO.
D Transferring in VFO mode
This is useful for transferring programmed contents to
VFO.
Frequency transferring can be performed in either VFO
mode or memory mode.
TRANSFERRING EXAMPLE IN VFO MODE
Operating frequency
: 21.320 MHz/USB (VFO)
Contents of M-ch 16
: 14.018 MHz/CW
q Select VFO mode with [V/M].
w Select the memory channel to be transferred with
[UP Y] or [Z DN].
USB
RX
ANT 1
S1
20
40
• “BLANK” appears if the selected memory channel is a
blank channel (and does not have contents).
e Push [V/M] for 2 sec. to transfer the frequency and
operating mode.
or
UP
AGC
60dB
VFO
DN
USB
• Transferred frequency and operating mode appear on
the frequency readout.
RX
ANT 1
S1
20
40
AGC
60dB
VFO
Beep
Beep
Beep
V/M
CW
ANT 1
S1
D Transferring in memory mode
This is useful for transferring frequency and operating
mode while operating in memory mode.
When you have changed the frequency or operating mode in the selected memory channel:
• Displayed frequency and mode are transferred.
• Programmed frequency and mode in the memory channel are not transferred, and they remain
in the memory channel.
20
60dB
RX
AGC
VFO
TRANSFERRING EXAMPLE IN MEMORY MODE
Operating frequency
: 14.020 MHz/CW (M-ch 16)
Contents of M-ch 16
: 14.018 MHz/CW
CW
ANT 1
S1
20
40
RX
AGC
60dB
MEMO
Beep
Beep
Beep
V/M
CW
q Select the memory channel to be transferred with
[UP Y] or [Z DN] in memory mode.
40
Push for 2 sec.
ANT 1
S1
20
40
Push for 2 sec.
RX
AGC
60dB
• And, set the frequency or operating mode if required.
MEMO
w Push [V/M] for 2 sec. to transfer the frequency and
operating mode.
V/M
• Displayed frequency and operating mode are transferred to the VFO.
CW
RX
Displayed memory
channel contents
are transferred.
e To return to VFO mode, push [V/M] momentarily.
ANT 1
S1
20
40
AGC
60dB
VFO
V/M
CW
ANT 1
S1
20
40
RX
AGC
60dB
Memory channel
contents remain in
the memory channel.
MEMO
23
6
MEMORY OPERATION
■ Memory names
All memory channels (including scan edges) can be
tagged with alphanumeric names of up to 8 characters each.
r Push [ENT] to edit memory channel name.
• A cursor appears and blinks.
• Memory channel names of blank channels cannot be
edited.
Letters (capitals except ‘o’), numerals and spaces can
be used. Numerals can only be used for the 7th and
8th digits.
USB
RX
ANT 1
S1
20
40
AGC
60dB
MEMO
D Turning memory name indication
ON/OFF
q Select memory mode with [V/M].
w Push [SEL] for 2 sec. to turn memory name indication ON.
• Frequency disappears and a memory name appears if
programmed.
USB
RX
ANT 1
S1
20
40
AGC
60dB
MEMO
Non-named channel
e Push [SEL] for 2 sec. to turn memory name indication OFF.
While the memory name indication is selected,
pushing [TS] shows the operating frequency; and
rotating the tuning dial while pushing [TS] changes
the frequency temporally.
t Input the desired character by pushing a key on
the keypad one or more times.
• [1] inputs numeral 1.
• [2] inputs numeral 2 and letters A to C.
• [3] inputs numeral 3 and letters D to F.
• [4] inputs numeral 4 and letters G to I.
• [5] inputs numeral 5 and letters J to L.
• [6] inputs numeral 6 and letters M to O.
• [7] inputs numeral 7 and letters P, R and S.
• [8] inputs numeral 8 and letters T to V.
• [9] inputs numeral 9 and letters W to Y.
• [0] inputs numeral 0 and letters Q and Z.
• Rotate tuning dial for cursor movement.
• Numerals can only be used for the 7th and 8th digits.
• Push [•] to delete the selected character and input a
space.
y Push [ENT] to input the set the name.
• The cursor disappears.
• Push [CLR] to abandon the settings and return to previous memory name.
USB
D Editing (programming) memory names
q Select memory mode with [V/M].
w Push [SEL] for 2 sec. to turn memory name indication ON.
e Select the memory channel to program with [UP Y]
or [Z DN].
• “BLANK” appears if the selected memory channel is a
blank channel (and does not have contents).
RX
ANT 1
S1
20
40
AGC
60dB
MEMO
u Repeat steps e to y to program another memory
channel’s name, if desired.
i Push [SEL] for 2 sec. to turn memory name indication OFF.
■ Memory clearing
Any unnecessary memory channels can be cleared.
The cleared memory channels become blank channels.
q Select memory mode with [V/M].
w Select the memory channel to be cleared with
[UP Y] or [Z DN].
e Push [CLR] for 2 sec. to clear the contents.
• The programmed frequency and operating mode disappear.
• “BLANK” appears.
r To clear other memory channels, repeat steps w
and e.
24
USB
RX
ANT 1
S1
20
40
AGC
60dB
MEMO
Beep
Beep
Beep
CLR
Push for 2 sec.
BLANK
S1
20
40
60dB
MEMO
7
SCANS
■ Scan types
PROGRAMMED SCAN/AUTO MEMORY WRITE SCAN
MEMORY SCAN
Repeatedly scans between two scan edge frequencies
(scan edge memory channels P1 and P2). Auto memory
write scan automatically memorizes paused frequencies
into memory channels 80 to 99.
Repeatedly scans all programmed memory channels.
Scan edge
P1 or P2
Scan edge
P2 or P1
BLANK
S (select)
Mch 2
Mch 1
Mch 3
Mch 4
S (select)
S (select)
Scan
Mch 99
Mch 7
Jump
S (select)
S (select)
Mch 6
This scan operates in VFO mode.
This scan operates in memory mode.
SELECT MEMORY SCAN
PRIORITY WATCH
Repeatedly scans all select memory channels.
Repeatedly watches a memory channel.
S (select)
Mch 5
BLANK
5 sec.
Mch 2
Mch 1
Mch 3
Mch 4
S (select)
S (select)
Mch 99
Mch 7
S (select)
S (select)
125 msec.
VFO
frequency
Mch 5
Memory
channel
Mch 6
This scan operates in memory mode.
This scan operates in VFO mode.
■ Preparation
• Channels
• Scan speed
For programmed scan/auto memory write scan:
Program scan edge frequencies into scan edge memory channels P1 and P2.
Scan speed can be selected from 2 levels, high or low,
in set mode. See p. 31 for details.
• Squelch condition
For memory scan:
Program 2 or more memory channels except scan
edge memory channels.
For select memory scan:
Designate 2 or more memory channels as select memory channels. To designate the channel as a select
memory channel, select a memory channel, then push
[SEL] in the scan screen (memory mode) or in the
memory channel screen.
For priority watch:
Program 1 or more memory channels.
• Scan resume ON/OFF
Scan
start
with
Programmed scan/
auto memory write
scan
Memory scan
The scan continues Scan
pauses
on
Squelch until it is stopped man- each channel when
ually, and does not the scan resume is
open
pause even if it detects ON; not applicable
signals.
when OFF.
Scan stops when detecting a signal.
Squelch If you set scan resume ON in set mode, the
open
scan pauses for 10 sec. when detecting a sigclosed nal, then resumes. When a signal disappears
while scan is paused, scan resumes 2 sec.
later.
You can select the scan to resume or cancel when detecting a signal, in set mode. Scan resume ON/OFF
must be set before operating a scan. See p. 31 for
ON/OFF setting and scan resume condition details.
25
7
SCANS
■ Programmed scan operation
q Select VFO mode with [V/M].
w Select the desired operating mode.
• The operating mode can also be changed while scanning.
e Set [RF/SQL] open or closed.
• See previous page for scan condition.
• If the [RF/SQL] control function is set as RF control, the
squelch always opens. See pgs. 14, 30 for details.
r Push [SCAN] to start the programmed scan.
t When the scan detects a signal, the scan stops,
pauses or ignores it depending on the resume setting and the squelch condition.
y To cancel the scan, push [SCAN].
If the same frequencies are programmed into the
scan edge memory channel P1 and P2, programmed scan does not start.
• “SCAN” appears while scanning.
USB
RX
ANT 1
S1
20
40
AGC
60dB
VFO
SCAN
■ Memory/select memory scan operation
q Select memory mode with [V/M].
w Select the desired operating mode.
• The operating mode can also be changed while scanning.
e Set [RF/SQL] open or closed.
• See previous page for scan condition.
• If the [RF/SQL] control function is set as RF control, the
squelch always opens. See pgs. 14, 30 for details.
t When the scan detects a signal, the scan stops,
pauses or ignores it depending on the resume setting and the squelch condition.
y To cancel the scan, push [SCAN].
2 or more memory channels must be programmed
for memory scan to start.
r Push [SCAN] to start the memory/select memory
scan.
• “SCAN” appears while scanning.
USB
RX
ANT 1
S1
20
40
AGC
60dB
SCAN MEMO
■ Setting select memory channels
q Select memory mode with [V/M].
w Select the desired memory channel to set as select memory channel.
e Push [SEL] to set the memory channel as a select
memory or not.
• “S” appears for select memory channels.
r Repeat steps w to e to program another memory
channel as a select memory channel, if desired.
26
USB
RX
ANT 1
S1
20
40
AGC
60dB
MEMO
“S” appears for the select channel.
SCANS
■ Priority watch operation
Priority watch checks for signals on a frequency every
5 sec. while operating on a VFO frequency.
q Select memory mode with [V/M].
w Select the desired memory channel to be watched
with [UP Y] or [Z DN].
e Select VFO mode.
r Set [RF/SQL] closed.
• If the [RF/SQL] control function is set as RF control, the
squelch always opens. See pgs. 14, 30 for details.
t Push [SCAN] for 2 sec. to start priority watch.
y When a signal is received on a watch channel, the
function display shows the watch channel and
“SCAN” blinks.
USB
RX
ANT 1
S1
20
40
AGC
60dB
SCAN MEMO
u To cancel the watch, push [SCAN].
• “SCAN” appears.
USB
ANT 1
S1
20
40
AGC
60dB
VFO
SCAN
■ Auto memory write scan
Auto memory write scan operates in the same way as
programmed scan. However, when a signal is received, the received frequency is automatically written into memory channels (80 to 99).
When the auto memory write scan starts, the previously written memory channels (80 to 99) are
cleared.
80
81
82
83
84
•
•
•
98
99
14.456.00
14.567.00
14.678.00
14.890.00
14.050.00
--------------
--------------
r Push [SCAN] to start the programmed scan.
• “SCAN” appears while scanning.
• If the same frequencies are programmed into the scan
edge memory channel P1 and P2, programmed scan
does not start.
t Push [MW] to start the auto memory write scan.
• “80” blinks when auto memory write scan starts.
USB
RX
ANT 1
S1
20
40
AGC
60dB
BLANK
VFO
SCAN
y When the scan detects a signal, the frequency is
programmed into a memory channel (80 to 99),
starting from channel 80.
u To cancel the scan, push [SCAN].
q Select VFO mode with [V/M].
w Select the desired operating mode.
• The operating mode can also be changed while scanning.
e Set [RF/SQL] closed.
• If the [RF/SQL] control function is set as RF control, the
squelch always opens. See pgs. 14, 30 for details.
27
8
CLOCK AND TIMERS
■ Setting the current time
The receiver has a built-in 24-hour clock with poweroff and power-on timer functions. This is useful when
logging SWL’s, BCL’s and so on.
e Set the current time using the tuning dial; or push
keypad using 4-digit 24 hour system.
q Push [CLOCK] to select clock indication mode.
• Current time and “CL” appear.
r Push [ENT] to set the time.
• Push [CLR] to cancel the setting.
t Push [CLOCK] to exit clock indication mode.
w Push [(ANT) SET] for 2 sec. to enter time setting
condition.
• Current time flashes.
■ Setting power-on time
The receiver can be set to turn ON automatically at a
specified time.
q Push [CLOCK] to select clock indication mode.
w Push [UP Y] to select power-on timer screen.
r Set the desired time using the tuning dial; or push
keypad using 4-digit 24 hour system.
t Push [ENT] to set the time.
• Power-on timer is automatically turned ON.
• Push [CLR] to cancel the setting.
• Power-on time and “on” appear.
TIMER
e Push [(ANT) SET] for 2 sec. to enter time setting
condition.
• Power-on time flashes.
• Push [(ANT) SET] momentarily when the power-on timer
is already turned ON.
y Push [(ANT) SET] momentarily to toggle the poweron timer ON and OFF, if necessary.
• “o” and “X” indicates the power-on timer is turned ON
and OFF, respectively.
u Push [ENT] to exit clock indication mode.
i Push [POWER] for 2 sec. to turn the power OFF.
• When the set time arrives, the power is automatically
turned ON.
28
CLOCK AND TIMERS
■ Setting power-off time
The receiver can be set to turn OFF automatically at a
specified time.
q Push [CLOCK] to select clock indication mode.
w Push [UP Y] or [Z DN] twice to select power-off
timer screen.
• Power-off time and “oF” appear.
r Set the desired time using the tuning dial; or push
keypad using 4-digit 24 hour system.
t Push [ENT] to set the time.
• Power-off timer is automatically turned ON.
• Push [CLR] to cancel the setting.
TIMER
y Push [(ANT) SET] momentarily to toggle the poweroff timer ON and OFF, if necessary.
e Push [(ANT) SET] for 2 sec. to enter time setting
condition.
• Power-off time flashes.
• Push [(ANT) SET] momentarily when the power-off timer
is already turned ON.
• “o” and “X” indicates the power-off timer is turned ON
and OFF, respectively.
u Push [ENT] to exit clock indication mode.
• When the set time arrives, the power is automatically
turned OFF with 5 beeps.
■ Setting sleep timer period
The receiver can be set to turn OFF automatically.
The power-off period can be set from 1 min. to 23
hours 59 min.
q Push [CLOCK] to select clock indication mode.
w Push [Z DN] to select sleep timer screen.
• Sleep timer period and “SL” appear.
r Set the desired periods using the tuning dial; or
push keypad using 4-digit 24 hour system.
t Push [ENT] to set the periods.
• Sleep timer is automatically turned ON.
• Push [CLR] to cancel the setting.
TIMER
y Push [(ANT) SET] momentarily to toggle the sleep
timer ON or OFF, if necessary.
e Push [(ANT) SET] for 2 sec. to enter time setting
condition.
• Sleep timer period flashes.
• “o” and “X” indicates the sleep timer is turned ON and
OFF, respectively.
u Push [ENT] to exit clock indication mode.
i The receiver emits 5 beeps and turns OFF after
the sleep timer period elapses.
29
9
SET MODE
■ Set mode description
Set mode is used for programming infrequently
changed values or conditions of functions.
D Set mode operation
q Push [(ANT) SET] to enter the set mode.
w Push [UP Y] or [Z DN] to select the desired item.
e Set the desired condition using the tuning dial.
r Push [(ANT) SET] to exit the set mode.
• RF/squelch control
The [RF/SQL] control can be set as the squelch control (default; RF gain is fixed at maximum), the RF
gain control only (squelch is fixed as open) or
RF/squelch control.
See p. 14 for details.
• Confirmation beep
A beep sounds each time a switch is pushed to confirm it. This function can be turned OFF for silent operation.
The volume level can be set in the next item.
• Beep level
This item adjusts the volume level for confirmation
beep tones from 0% to 100% in 1% steps.
• The volume level is displayed in 10% steps. ‘5’ indicates
50% volume level.
• Beep level limit
This item limits the maximum volume level for confirmation beep tones.
• S-meter peak hold
The peak level of the S-meter can be displayed for 0.5
sec. to confirm it easily.
30
SET MODE
• Scan resume
This item sets the scan resume function ON or OFF.
• “on” scan resumes 10 sec. after stopping on a signal (or
2 sec. after a signal disappears)
• “oF” scan does not resume after stopping on a signal.
See p. 25 for scanning details.
• Scan speed
The receiver has 2 speeds for scanning, high and low.
See p. 25 for scanning details.
• AM mode noise blanker
The noise blanker for AM mode can be turned ON
and OFF.
• S-AM mode detector
The S-AM mode can be detected with the standard
AM detector automatically when the signal level is
poor.
• “En” (Enable) The signal is detected with the standard
AM detector when the signal level is poor.
• “SA” (S-AM) The signal is always detected with S-AM.
• CW pitch control
The received CW audio pitch and monitored CW
audio can be adjusted to suit your preferences (300
to 900 Hz) without changing the operating frequency.
• The CW audio pitch can be adjusted in 10 Hz steps.
• The CW audio pitch is displayed in 10 Hz steps. ‘60’ indicates 600 Hz CW audio pitch.
• Blank channel indication
This item sets the blank channel indication ON or
OFF.
• “on” blank memory channels are skipped and can not be
selected.
• “oF” all memory channels can be selected.
31
9
SET MODE
• Recorder remote
This item sets the [REC REMOTE] jack function ON
or OFF.
• CI-V address
To distinguish equipment, each CI-V transceiver or receiver has its own Icom standard address in hexadecimal code. The IC-R75’s address is 5Ah.
When 2 or more IC-R75’s are connected to an optional CT-17 CI-V LEVEL CONVERTER, rotate the tuning
dial to select a different address for each IC-R75 in
the range 01h to 7Fh.
• CI-V baud rate
This item sets the data transfer rate. “3” (300 bps),
“12” (1200 bps), “48” (4800 bps), “96” (9600 bps), “HI”
(19200 bps) and “At” (automatic) are available.
When “At” is selected, the baud rate is automatically
set according to the connected controller or remote
controller.
• CI-V transceive
Transceive operation is possible with the IC-R75 connected to other Icom HF transceivers or receivers.
When “on” is selected, changing the frequency, operating mode, etc. on the IC-R75 automatically changes
those of connected transceivers (or receivers) and
vice versa.
• CI-V with IC-735
When connecting the IC-R75 to the IC-735 for transceive operation, you must change the operating frequency data length to 4 bytes.
• This item must be set to “ON” only when operating receiver
with the IC-735.
• Speech language
When the optional UT-102 VOICE SYNTHESIZER UNIT is
installed, you can select between English and Japanese as the language.
• “En” English announcement
• “JP” Japanese announcement
See p. 34 for unit installation.
32
SET MODE
• Speech speed
When the optional UT-102 VOICE SYNTHESIZER UNIT is
installed, you can select between faster or slower synthesizer output.
See p. 34 for unit installation.
• Speech S-level
When the optional UT-102 VOICE SYNTHESIZER UNIT is
installed, you can have signal level, frequency, mode
and current time announcement. Signal level announcement can be deactivated if desired.
See p. 34 for unit installation.
• Speech current time
When the optional UT-102 VOICE SYNTHESIZER UNIT is
installed, you can have signal level, frequency, mode
and current time announcement. Current time announcement can be deactivated if desired.
See p. 34 for unit installation.
• RTTY mark frequency
This item selects the RTTY mark frequency. RTTY
mark frequency is toggled between 1275, 1615 and
2125 Hz.
• RTTY shift width
This item adjusts the RTTY shift width. There are 3
selectable values: 170, 200 and 425 Hz.
• LCD backlight
This item adjusts the brightness of the LCD from 0 %
to 100 % in 1 % steps.
• The brightness is displayed in 10% steps. ‘5’ indicates 50%
brightness.
• Auto tuning step
This item sets the auto tuning speed. The tuning dial
normally changes the frequency 2.5 kHz/revolution in
10 Hz tuning step. When auto tuning speed is turned
on this increases to 50 kHz/revolution in 50 Hz tuning
step during quick rotation of the dial.
33
10
OPTION INSTALLATIONS
■ Opening the receiver’s case
Follow the case and cover opening procedures shown
here when you want to install an optional unit or adjust
an internal unit, etc.
e Remove the 2 screws from the bottom of the receiver, slide the cover backward, then remove the
bottom cover.
CAUTION: DISCONNECT the DC power cable
from the receiver before performing any work on the
receiver. Otherwise, there is danger of electric shock
and/or equipment damage.
q Remove the 2 screws from the left side of the receiver to remove an optional carrying handle, if necessary.
w Remove the 4 screws from the top of the receiver
and 4 screws from the sides, then lift up the top
cover.
■ CR-282 HIGH STABILITY CRYSTAL UNIT
By installing the CR-282, the total frequency stability
of the receiver will be improved.
q Remove the top cover as shown in the diagram
above.
w Remove 5 screws from the PLL unit, disconnect
P1 from J491 (MAIN unit), then remove the PLL
unit.
e Remove the supplied internal crystal and replace
with the CR-282.
r Adjust the reference frequency at L2 using a frequency counter.
t Return the PLL unit and top cover to their original
positions.
CR-282
Connect a frequency counter
here and adjust the frequency
to 60.00000 MHz.
PLL unit
Internal
crystal
MAIN unit
L2
PLL unit
■ UT-102 VOICE SYNTHESIZER UNIT
The UT-102 announces the received frequency,
mode, S-meter level and current time in a clear, electronically-generated voice, in English (or Japanese).
➥ Push [LOCK] for 2 sec. to announce the frequency,
etc.
q Remove the top cover as shown above.
w Remove the protective paper attached to the bottom of the UT-102 to expose the adhesive strip.
e Plug UT-102 into J1271 on the MAIN unit as
shown at right.
r Return the top cover to its original position.
34
OPTION INSTALLATIONS
10
■ UT-106 DSP UNIT
The UT-106 provides AF DSP functions such as noise
reduction and auto notch.
q Remove the top and bottom covers.
w Remove the shielding plate.
e Remove the connection cable (P1241) from J1221
on the MAIN unit. Connect the cable into J1 on the
UT-106.
r Plug the connection cable (P1) from the UT-106 to
J1221 on the MAIN unit.
t Plug the flat cable into J3 on the UT-106 and to
J1231 on the MAIN unit.
• Take care of the conductor direction.
y Attach the Velcro tape as shown at right. Attach the
UT-106 to the reverse side of the MAIN unit.
u Return the shielding plate, top cover and bottom
cover to their original positions.
UT-106
P1241
J3
P1241
J1231
J1221
■ Optional IF filters
Several IF filters are available for the IC-R75. You can
install 1 filter for both 9 MHz and 455 kHz IF. Choose
appropriate filter for your operating needs.
9 MHz optional filters:
FL-101 CW NARROW FILTER
FL-232 RTTY/CW NARROW FILTER
FL-100 CW NARROW FILTER
FL-223 SSB NARROW FILTER
FL-103 SSB WIDE FILTER
455 kHz optional filters:
FL-53A CW NARROW FILTER
FL-52A CW/RTTY NARROW FILTER
FL-222 SSB NARROW FILTER
FL-96 SSB WIDE FILTER
FL-257 SSB WIDE FILTER
250 Hz/–6 dB
350 Hz/–6 dB
500 Hz/–6 dB
1.9 kHz/–6 dB
2.8 kHz/–6 dB
250 Hz/–6 dB
500 Hz/–6 dB
1.8 kHz/–6 dB
2.8 kHz/–6 dB
3.3 kHz/–6 dB
D Installation
q Remove the top cover as shown on the opposite
page.
w Install the desired 9 MHz filter as shown in the diagram below.
• The filters can be installed in either direction.
e Install the desired 455 kHz filter as shown in the
diagram below.
r Replace the top cover.
After filter installation, specify the installed filter
using filter set mode. (p. 19) Otherwise, the installed filter will not function properly.
455 kHz filter
9 MHz filter
35
11
MAINTENANCE
■ Troubleshooting
The following chart is designed to help you correct
problems which are equipment malfunctions.
POWER
PROBLEM
If you are not able to locate the cause of a problem or
solve it through the use of this chart, contact your nearest Icom Dealer or Service Center.
POSSIBLE CAUSE
SOLUTION
Power does not come on
when the [POWER] switch
is pushed.
• DC power cable is improperly connected.
• Fuse is blown.
• Reconnect the DC power cable correctly.
• Check for the cause, then replace the fuse with
a spare one.
(Fuses are installed in the DC power cable
and the internal MAIN unit.)
—
p. 37
No sound comes from the
speaker.
• Volume level is too low.
• Rotate [AF] clockwise to obtain a suitable
listening level.
• Rotate [RF/SQL] to 12 o’clock position to open
the squelch.
p. 2
• Reconnect to the antenna connector.
• Select an antenna suitable for the operating
frequency.
• Push [ATT] to turn the function OFF.
—
p. 16
• Select a suitable operating mode.
• Set [TWIN PBT] to the center position.
• Push [NB] to turn the function OFF.
• Push [P.AMP] once or twice to turn the function
OFF.
• Push [NR] to turn the function OFF.
p. 14
p. 15
p. 15
p. 16
• The squelch is closed.
RECEIVE
Sensitivity is low.
• The antenna is not connected properly.
• The antenna for another band is selected.
• The attenuator is activated.
Receive audio is distorted.
• The operating mode is not selected correctly.
• PBT function is activated.
• Noise blanker function is activated.
• Preamp is activated.
SCAN
• The optional noise reduction is activated and
the [NR] level is set too high.
DISPLAY
REF.
p. 14
p. 16
p. 20
Programmed scan does
not stop.
• Squelch is open.
• [RF/SQL] is assigned to RF gain control and
squelch is open.
• Set [RF/SQL] to the threshold point.
• Reset [RF/SQL] control assignment and set it to
the threshold point.
p. 14
pgs.
14, 30
Programmed scan does
not start.
• The same frequencies have been programmed
in scan edge memory channels P1 and P2.
• Program different frequencies in scan edge
memory channels P1 and P2.
p. 22
Memory scan does not
start.
• 2 or more memory channels have not been
programmed.
• Program 2 or more memory channels.
p. 22
Select memory scan does
not start.
• 2 or more memory channels have not been
designated as select channels.
• Designate 2 or more memory channels as select
channels for the scan.
p. 26
“F.AGC” flashes in the
function display.
• A scan or band scope function is activated via
an optional RS-R75 remote control software.
• If these functions are not in use, push [AGC] to
deactivate the function.
—
The displayed frequency
does not change properly.
• The dial lock function is activated.
• The internal CPU has malfunctioned.
• Push [LOCK] to deactivate the function.
• Reset the CPU.
■ Resetting the CPU
p. 13
See
below.
Resetting CLEARS all programmed contents in
memory channels and returns programmed values
in set mode to their defaults.
When first applying power or when the function seems
to be displaying erroneous information, reset the CPU
as follows:
q Make sure receiver power is OFF.
w While pushing [UP Y] and [Z DN], push [POWER]
to turn power ON.
[POWER]
36
[ZDN] [UPY]
• The internal CPU is reset.
• The receiver displays its initial VFO frequencies when resetting is complete.
MAINTENANCE
■ Fuse replacement
11
DC POWER CABLE FUSE REPLACEMENT
If a fuse blows or the receiver stops functioning, try to
find the source of the problem, and replace the damaged fuse with a new, rated fuse.
CAUTION: DISCONNECT the DC power cable
from the receiver when changing a fuse.
3 A fuse
The IC-R75 has 2 types of fuses installed for receiver
protection.
• DC power cable fuses .................................. FGB 3 A
• Circuitry fuse ................................................ FGB 3 A
CIRCUITRY FUSE REPLACEMENT
The 13.8 V DC from the DC power cable is applied to
all units in the IC-R75 through the circuitry fuse. This
fuse is installed in the MAIN unit.
FGB 3 A
q Remove the top cover as shown on p. 34
w Replace the circuitry fuse as shown in the diagram
at right.
e Replace the top cover.
■ Clock backup battery replacement
The receiver has a lithium backup battery (CR2032)
inside for clock and timer functions. The usual life of
the backup battery is approximately 2 years.
When the backup battery is exhausted, the receiver
receives normally but cannot retain the current time.
CR2032
37
12
SPECIFICATIONS
D General
• Frequency coverage
D Receiver
: 0.03–60.000000 MHz*
* 0.03–29.999999 MHz only for Asia version;
0.03–29.999999 and 50.0–52.0 MHz for Denmark
version; specifications guaranteed 0.1–29.99 MHz and
50–54 MHz only
• Mode
: USB, LSB, CW, RTTY, AM,
S-AM, FM
• Number of memory
channels
: 101 (99 regular, 2 scan edges)
• Frequency stability
: Less than ±7 ppm from 1
min. to 60 min. after power
on. After that rate of stability
less than ±1 ppm/hr. at
+25°C (+77°F). Temperature
fluctuations 0°C to +50°C
(+32°F to +122°F) less than
±5 ppm.
• Power supply
requirement
• Current drain
(at 13.8 V DC)
• Antenna connector
: 13.8 V DC ±15%
(negative ground)
: Standby
0.9 A
Max. audio 1.1 A
: SO-239 (50 Ω), push
connection terminal (500 Ω)
: 241(W) × 94(H) × 229(D) mm
(projections not included) 91⁄2(W) × 311⁄16(H) × 91⁄32(D) in
• Dimensions
• Weight (approx.)
: 3.0 kg; 6 lb 10 oz
• REMOTE connector
: RS-232C D-sub 9-pin
• CI-V connector
: 2-conductor 3.5 (d) mm (1⁄8˝)
• Receive system
: Triple-conversion
superheterodyne system
• Intermediate frequencies:
Mode
USB*/LSB*
CW*
RTTY*
AM*/S-AM
FM
1st (MHz)
69.0115
69.0106
69.0105
69.0100
69.0115
2nd (MHz)
9.0115
9.0106
9.0105
9.0100
9.0115
3rd (kHz)
455
455.9
456
450
450
* Frequencies differ according to the selected IF filter.
• Sensitivity
Frequency
range
SSB/CW/RTTY AM/S-AM
FM
10 dB S/N
10 dB S/N 12 dB SINAD
0.1–1.8 MHz*1
2.0 µV
5.6 µV
1.8–28 MHz*
0.16 µV
1.6 µV
—
0.16 µV
1.6 µV
0.22 µV
0.13 µV
1.0 µV
0.2 µV
28–29.99 MHz*2
50–54 MHz*3
—
* Preamp: OFF; * Preamp 1: ON; * Preamp 2: ON
• Squelch sensitivity (threshold):
SSB, CW, RTTY Less than 5.6 µV*1
FM
Less than 0.32 µV*2
*1 Preamp 1: ON; *2 Preamp 2: ON
• Selectivity
SSB, CW, RTTY More than 2.1 kHz/–6 dB
Less than 4.0 kHz/–60 dB
AM, S-AM
More than 6 kHz/–6 dB
Less than 20 kHz/–50 dB
FM
More than 12 kHz/–6 dB
Less than 30 kHz/–40 dB
• Spurious and image rejection ratio:
More than 70 dB
(except IF through/50 MHz
band)
• Audio output power
(at 13.8 V DC)
• PHONES connector
: More than 2.0 W at 10%
distortion with an 8 Ω load
: 3-conductor 6.35 (d) mm
(1⁄4˝)
• External SP connector : 2-conductor 3.5 (d) mm
(1⁄8˝)/8 Ω
All stated specifications are typical and subject to change without notice or obligation.
38
OPTIONS
13
FL-100, FL-101, FL-103, FL-223 and FL-232
9 MHz FILTERS
FL-52A, FL-53A, FL-96, FL-222 and FL-257
455 kHz FILTERS
• FL-100: 500 Hz/–6 dB (CW/RTTY nar.)
• FL-101: 250 Hz/–6 dB (CW nar.)
• FL-103: 2.8 kHz/–6 dB (SSB wide)
• FL-223: 1.9 kHz/–6 dB (SSB nar.)
• FL-232: 350 Hz/–6 dB (RTTY/CW nar.)
• FL-52A: 500 Hz/–6 dB (CW/RTTY nar.)
• FL-53A: 250 Hz/–6 dB (CW nar.)
• FL-96: 2.8 kHz/–6 dB (SSB wide)
• FL-222: 1.8 kHz/–6 dB (SSB nar.)
• FL-257: 3.3 kHz/–6 dB (SSB wide)
MB-23 CARRYING HANDLE
IC-MB5 MOBILE MOUNTING BRACKET
Carrying handle, convenient for portable operation.
Receiver mounting bracket for mobile operation.
CT-17 CI-V LEVEL CONVERTER
SP-21 EXTERNAL SPEAKER
For remote receiver control using a personal computer. You
can change frequencies, operating mode, memory channels, etc.
Designed for base station operation.
Input impedance: 8 Ω
Max. input power: 5 W
CR-282 HIGH-STABILITY CRYSTAL UNIT
UT-102 VOICE SYNTHESIZER UNIT
Contains a temperature-compensating oven heater and crystal unit for improved frequency stability.
• Frequency stability: ±0.5 ppm
Announces the receive frequency, mode, S-meter level and
current time in a clear, electronically-generated voice, in English (or Japanese).
RS-R75 REMOTE CONTROL SOFTWARE
UT-106 DSP UNIT
Allows you to control the receiver from your PC (for Microsoft® Windows® 95 or Windows® 98).
Provides AF DSP functions such as noise reduction and auto
notch.
Microsoft and Windows are registered trademarks of Microsoft Corporation.
39
14
CONTROL COMMAND
■ Remote jack (CI-V) information
• CI-V connection example
The receiver can be connected through an optional
CT-17 CI-V LEVEL CONVERTER to a personal computer
equipped with an RS-232C port. The Icom Communications Interface-V (CI-V) controls the following functions of the receiver.
IC-R75
9–15
V DC
Up to 4 Icom CI-V transceivers or receivers can be
connected to a personal computer equipped with an
RS-232C port. See p. 32 for setting the CI-V condition
using set mode.
ct- 17
• Data format
mini-plug cable
The CI-V system can be operated using the following
data formats. Data formats differ according to command numbers. A data area or sub command is added
for some commands.
NG MESSAGE TO CONTROLLER
40
Command number
(see table at right)
Sub command number
(see table at right)
Receiver’s default address
Controller’s default address
Preamble code (fixed)
FE FE E0 5A Cn Sc
Data area
FD
FE FE E0 5A FA FD
End of message code (fixed)
NG code (fixed)
End of message code (fixed)
BCD code data for frequency or
memory number entry
IC-R75 TO CONTROLLER
FE FE E0 5A FB FD
End of message code (fixed)
FD
OK code (fixed)
Data area
Receiver’s default address
Receiver’s default address
Command number
(see table at right)
Sub command number
(see table at right)
Controller’s default address
Receiver’s default address
Preamble code (fixed)
FE FE 5A E0 Cn Sc
Controller’s default address
Controller’s default address
Preamble code (fixed)
Preamble code (fixed)
End of message code (fixed)
OK MESSAGE TO CONTROLLER
BCD code data for frequency or
memory number entry
CONTROLLER TO IC-R75
BC-25
(optional)
personal
computer
CONTROL COMMAND
14
• Command table
Command Sub command
00
—
Same as
01
command 06
02
03
04
05
06
07
08
09
0A
0B
0E
10
Description
Send frequency data
Send mode data
—
—
Same as
command 06
Read band edge frequencies
Read operating frequency
Read operating mode
—
00*1
01*1
02*1
03*1
04*1
05*1
07*1
08*1
11*1
—
—
0001 – 0101*2
Set frequency data
Set LSB
Set USB
Set AM
*1Add 00, 01 or 02
Set CW
for selecting wide,
Set RTTY
normal or narrow
Set FM
filter, respectively.
Set CW-R
Set RTTY-R
Set S-AM
Select VFO mode
Select memory mode
Select memory channel
*2P1=0100, P2=0101
—
—
—
00
01
02
04
22
23
B0
B1
D0
D3
Memory write
Memory to VFO
Memory clear
Scan stop
Programmed/memory scan start
Programmed scan start
Auto memory write scan start
Memory scan start
Select memory scan start
Set as non-select channel
Set as select channel
Set scan resume OFF
Set scan resume ON
00
01
02
03
04
05
06
07
08
09
10
11
10 Hz (1 Hz) tuning step
100 Hz tuning step
1 kHz tuning step
5 kHz tuning step
6.25 kHz tuning step
9 kHz tuning step
10 kHz tuning step
12.5 kHz tuning step
20 kHz tuning step
25 kHz tuning step
100 kHz tuning step
1 MHz tuning step
Command Sub command
00
11
20
Description
Attenuator OFF
Attenuator ON
12
00
01
Select [ANT1]
Select [ANT2]
13
00
01
02
Announce with voice synthesizer
(00=all data; 01=frequency and
S-meter level; 02=receive mode)
14
01 + level data
[AF] level setting (0000=max.
CCW to 0255=max. CW)
02 + level data
[RF] level setting (0000=max.
CCW to 0255=11 o’clock)
03 + level data
[SQL] level setting (0000=11
o’clock to 0255=max. CW)
06 + level data
[NR] level setting (0000=min. to
0255=max.)
07 + level data
Inside [TWIN PBT] setting
(0000=max. CCW, 0128=center,
0255=max. CW)
08 + level data
Outside [TWIN PBT] setting
(0000=max. CCW, 0128=center,
0255=max. CW)
09 + level data
[CW PITCH] setting (0000=low
pitch to 0255=high pitch)
01
02
Read squelch condition
Read S-meter level
02
Set preamp (00=OFF;
01=preamp 1; 02=preamp 2)
12
Set AGC time constant (00=OFF;
01=S-fast; 02=fast; 03=slow)
22
40
Set noise blanker (00=OFF; 01=ON)
Set optional noise reduction
(00=OFF; 01=ON)
41
Set optional auto notch
(00=OFF; 01=ON)
18
00
01
Turn the receiver power ON
Turn the receiver power OFF
19
1A
00
00 + data
Read the receiver ID
Send/read memory contents
(See example 1 on p. 42)
Send/read IF filter setting
(See example 2 on p. 42)
Send/read set mode contents
(See example 3 on p. 43)
15
16
01 + data
02 + data
41
14
CONTROL COMMAND
• CI-V data example 1
Reading/sending memory contents:
q Memory channel
39
w Select memory ch select ch
e Receive frequency 12.345678 MHz
r Receive mode
FM
t IF filter
Narrow
y Attenuator
u Preamp
i Antenna selection
o Memory name
OFF
Preamp 1
ANT1
DXSPOT 1
NOTE: When reading data, w – o are not required.
FEFE 5AE 0 1 A 0 0 0 0 3 9 0 1 7 8 5 6 3 4 1 2 0 0 0 5 0 3 0 0 0 1 0 0 4 4 5 8 5 3 5 0 4 F 5 4 2 0 3 1 FD
D X S P O T Space 1
Mode
Mode
Data IF filter
Data P.AMP
Data
Mch
Data
0001
…
0099
0100
0101
1 ch
…
99 ch
00
LSB
05
FM
01
Wide
00
OFF
01
P1
P2
02
USB
AM
07
08
CW-R
RTTY-R
02
03
Normal
Narrow
01
02
03
04
CW
11
S-AM
RTTY
ANT
Data
1 GHz
100 MHz
1 MHz
10 MHz
10 kHz
100 kHz
1 kHz
100 Hz
10 Hz
1 Hz
Memory name uses ASCII codes
•Space = 20h
•Numerals = 30h–39h,
•Alphabetical = 41h–5Ah
(except 7th and 8th digits)
•Non-named channel = FFh
Data
SEL
Data
ATT
Data
00
OFF
00
OFF
00
01
ON
20
ON
01
• CI-V data example 2
Reading/sending IF filter setting:
q Receive mode
LSB/USB
w 9 MHz filter
Normal
Narrow
Wide
e 455 kHz filter
Normal
Narrow
Wide
2.4 kHz
OFF
15 kHz
6 kHz
2.4 kHz
15 kHz
NOTE: When reading data, w and e are not required.
Normal
Narrow
Wide
FEFE 5AE 0 1 A 0 1 0 0 0 2 0 1 0 7 0 4 0 0 0 0 FD
42
Data
Mode
Data
9 MHz filter
Data
455 kHz filter
00
LSB/USB
00
15 kHz (built-in)
00
15 kHz (built-in)
01
CW/CW-R
RTTY/RTTY-R
01
2.8 kHz (FL-103)
2.4 kHz (built-in)
01
02
02
6 kHz (built-in)
3.3 kHz (FL-257)
03
04
AM
03
04
1.9 kHz (FL-223)
S-AM
03
04
2.4 kHz (built-in)
05
FM
02
500 Hz (FL-100)
2.8 kHz (FL-96)
05
350 Hz (FL-232)
05
1.8 kHz (FL-222)
06
250 Hz (FL-101)
06
500 Hz (FL-52A)
07
OFF
07
250 Hz (FL-53A)
CONTROL COMMAND
• CI-V data example 3
Reading/sending set mode contents:
q Set mode number
21 (backlighting)
w Set data
Set backlighting to a little on
the brighter side (180)
14
FEFE 5AE 0 1 A 0 2 2 1 0 1 8 0 FD
NOTE: When reading data, w is not required.
w changes depending on the set mode contents.
Refer to the 'Type' in the table below.
Type 1
0 1
Type 2
0 1 8 0
Type 3
Type 4
hr. min. sec.
hr. min.
1 5 5 0 0 0
1 4 3 0
• Set mode data table
Set mode No (q)
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
Set mode item
RF/squelch control
Confirmation beep
Beep level
Beep level limit
S-meter peak hold
Scan resume
Scan speed
AM mode noise blanker
S-AM mode detector
CW pitch control
Blank channel indication
Recorder remote
CI-V transceive
CI-V with IC-735
Speech language
Speech speed
Speech S-level
Speech current time
RTTY mark frequency
RTTY shift width
LCD backlight
Auto tuning step
Expanded filter selection
9 MHz optional IF filter
455 kHz optional IF filter
Memory name indication
Set current time
Power-on timer
Set power-on time
Power-off timer
Set power-off time
Sleep timer
Set sleep time
Selectable value
Squech/Auto/RF gain + squelch
OFF/ON
0 – 100%
OFF/ON
OFF/ON
OFF/ON
Low/high
OFF/ON
S-AM mode/AM mode when signal level is poor
300 Hz – 900 Hz
OFF/ON
OFF/ON
OFF/ON
OFF/ON
English/Japanese
Slower/Faster
OFF/ON
OFF/ON
1275 Hz/1615 Hz/2125 Hz
170 Hz/200 Hz/425 Hz
0 – 100%
OFF/ON
OFF/ON
None/FL-100/FL-101/FL-103/FL-223/FL-232
None/FL-52A/FL-53A/FL-96/FL-222/FL-257
Frequency indication/Memory name indication
0:00:00 – 23:59:59
OFF/ON
0:00 – 23:59
OFF/ON
0:00 – 23:59
OFF/ON
0:01 – 23:59
Data range (w)
00/01/02
00/01
0000 – 0255
00/01
00/01
00/01
00/01
00/01
00/01
0300 – 0900
00/01
00/01
00/01
00/01
00/01
00/01
00/01
00/01
00/01/02
00/01/02
0000 – 0255
00/01
00/01
00/01/02/03/04/05
00/01/02/03/04/05
00/01
000000 – 235959
00/01
0000 – 2359
00/01
0000 – 2359
00/01
0001 – 2359
Data type (w)
43
Count on us!
A-5580H-1EX-q
Printed in Japan
© 1999 Icom Inc.
6-9-16 Kamihigashi, Hirano-ku, Osaka 547-0002 Japan

---

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Title                           : US IC-R75 IM-1.qxd
Modify Date                     : 1999:03:23 15:23:24
Page Count                      : 46

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