Instruction Manual
Page 3
... to comply with the instructions, may result in permanent damage to operate the equipment. Versions of the IC-R75 which the receiver is no guarantee that interference will avoid possible damage to the receiver by one or more than 16 V DC, such as a 24 V battery, to radio communications. NEVER expose the receiver to part 15 of the receiver. ii DO NOT place...
... to comply with the instructions, may result in permanent damage to operate the equipment. Versions of the IC-R75 which the receiver is no guarantee that interference will avoid possible damage to the receiver by one or more than 16 V DC, such as a 24 V battery, to radio communications. NEVER expose the receiver to part 15 of the receiver. ii DO NOT place...
Instruction Manual
Page 5
...; 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...
...; 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...
Instruction Manual
Page 6
... [RF/SQL] (outer control; The squelch removes noise output from the speaker. i TUNING DIAL Changes the displayed frequency, selects set mode. e AF CONTROL [AF] (inner control) Varies the audio output level from the speaker (closed condition) when no signal is received. • The squelch is installed and when pushed for FM. o TUNING DIAL TENSION LATCH Adjusts the tension of the 455 kHz and 9 kHz IF...
... [RF/SQL] (outer control; The squelch removes noise output from the speaker. i TUNING DIAL Changes the displayed frequency, selects set mode. e AF CONTROL [AF] (inner control) Varies the audio output level from the speaker (closed condition) when no signal is received. • The squelch is installed and when pushed for FM. o TUNING DIAL TENSION LATCH Adjusts the tension of the 455 kHz and 9 kHz IF...
Instruction Manual
Page 7
... tuning step or turns the quick tuning step OFF. • While the quick tuning indicator (√) is displayed, the frequency can be changed in 1 Hz steps. ➥ While the kHz quick tuning step is selected, enters tuning step set mode. !2 M EMORY WRITE SWITCH [MW] (pgs. 22, 27) ➥ Stores the displayed frequency and operating mode into the selected memory channel when pushed...
... tuning step or turns the quick tuning step OFF. • While the quick tuning indicator (√) is displayed, the frequency can be changed in 1 Hz steps. ➥ While the kHz quick tuning step is selected, enters tuning step set mode. !2 M EMORY WRITE SWITCH [MW] (pgs. 22, 27) ➥ Stores the displayed frequency and operating mode into the selected memory channel when pushed...
Instruction Manual
Page 9
... that the displayed memory channel is not programmed. • This indicator appears both in VFO and memory modes. !7 FREQUENCY READOUT Shows the operating frequency. !8 RECEIVE INDICATOR Appears while receiving a signal or when the squelch is open. !9 MODE INDICATORS (p. 14) Indicate the selected operating mode. @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...
... that the displayed memory channel is not programmed. • This indicator appears both in VFO and memory modes. !7 FREQUENCY READOUT Shows the operating frequency. !8 RECEIVE INDICATOR Appears while receiving a signal or when the squelch is open. !9 MODE INDICATORS (p. 14) Indicate the selected operating mode. @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...
Instruction Manual
Page 10
... lighter socket as a power source when operating in set mode. (p. 32) w RECORDER JACK [REC] Outputs receive audio signals. In this way commands can be turned OFF in a vehicle. Used for CI-V transceive operation with several receivers for recording. i ANTENNA 2 TERMINAL [ANT 2] (p. 9) Connects the red terminal to the receiver via an optional CT-17 CI-V level converter. The plug may cause voltage drops and ignition noise may be sent to...
... lighter socket as a power source when operating in set mode. (p. 32) w RECORDER JACK [REC] Outputs receive audio signals. In this way commands can be turned OFF in a vehicle. Used for CI-V transceive operation with several receivers for recording. i ANTENNA 2 TERMINAL [ANT 2] (p. 9) Connects the red terminal to the receiver via an optional CT-17 CI-V level converter. The plug may cause voltage drops and ignition noise may be sent to...
Instruction Manual
Page 11
... optional IC-MB5 mobile mounting bracket is approx. 3 kg. Make the distance between the [GND] terminal and ground as short as shown. Flat washer ■ Receiver stand The base of two angles depending on your operating conditions. D Carrying handle An optional handle allows you to a long earth-sunk copper rod. Set the stand to install the radio...
... optional IC-MB5 mobile mounting bracket is approx. 3 kg. Make the distance between the [GND] terminal and ground as short as shown. Flat washer ■ Receiver stand The base of two angles depending on your operating conditions. D Carrying handle An optional handle allows you to a long earth-sunk copper rod. Set the stand to install the radio...
Instruction Manual
Page 13
... mm Soft Strip the cable as r solder shown at left. Connecting a poor quality antenna to other audio equipment. [REC REMOTE] jack: Grounds when a signal is changed. Soft solder the center con- 1-2 mm ductor. 3 INSTALLATION AND CONNECTIONS ■ Antenna connection Antennas play a very important role in less than optimum performance. IC-R75 * When a set mode (p. 32). The frequency and mode become the same* when either radio is received and squelch opens.
... mm Soft Strip the cable as r solder shown at left. Connecting a poor quality antenna to other audio equipment. [REC REMOTE] jack: Grounds when a signal is changed. Soft solder the center con- 1-2 mm ductor. 3 INSTALLATION AND CONNECTIONS ■ Antenna connection Antennas play a very important role in less than optimum performance. IC-R75 * When a set mode (p. 32). The frequency and mode become the same* when either radio is received and squelch opens.
Instruction Manual
Page 14
...; 480 pixel, high color (16 bit) display Supplied RS-232C cable (OPC-743) PC IC-R75 10 3 INSTALLATION AND CONNECTIONS ■ FSK and AFSK (SSTV) connections To connect a terminal unit, TNC or scan converter, refer to the diagram below . r S et the connected terminal unit to the appropriate settings. • Refer to the desired frequency as below . w S elect RTTY mode (or USB, CW modes for HF band data communications).
...; 480 pixel, high color (16 bit) display Supplied RS-232C cable (OPC-743) PC IC-R75 10 3 INSTALLATION AND CONNECTIONS ■ FSK and AFSK (SSTV) connections To connect a terminal unit, TNC or scan converter, refer to the diagram below . r S et the connected terminal unit to the appropriate settings. • Refer to the desired frequency as below . w S elect RTTY mode (or USB, CW modes for HF band data communications).
Instruction Manual
Page 15
... 1 . w Push [•] on the keypad to keep a displayed frequency for later recall, you must program it has been stored into a memory channel by pushing [MW] for 2 sec. When turning power OFF or changing memory channels, the previously displayed frequency cannot be skipped. Push [MW] for details. r Push [ENT] to set to 850 kHz (0.850 MHz) 0 QZ . 8 5 TUV JKL ENT USB R X USB R X USB...
... 1 . w Push [•] on the keypad to keep a displayed frequency for later recall, you must program it has been stored into a memory channel by pushing [MW] for 2 sec. When turning power OFF or changing memory channels, the previously displayed frequency cannot be skipped. Push [MW] for details. r Push [ENT] to set to 850 kHz (0.850 MHz) 0 QZ . 8 5 TUV JKL ENT USB R X USB R X USB...
Instruction Manual
Page 18
... [FM] to the max. S-meter squelch Shallow Deep • When set as the [SQL] control Noise squelch threshold (FM mode) Noise squelch (FM mode) S-meter squelch threshold Squelch is open . RF gain adjustable range Noise squelch (FM mode) Maximum RF gain S-meter squelch • When set as the [RF] control Maximum RF gain Adjustable range Minimum RF gain 14 The RF (Radio Frequency) gain is used to adjust the receiver gain. • Shallow rotation moves...
... [FM] to the max. S-meter squelch Shallow Deep • When set as the [SQL] control Noise squelch threshold (FM mode) Noise squelch (FM mode) S-meter squelch threshold Squelch is open . RF gain adjustable range Noise squelch (FM mode) Maximum RF gain S-meter squelch • When set as the [RF] control Maximum RF gain Adjustable range Minimum RF gain 14 The RF (Radio Frequency) gain is used to adjust the receiver gain. • Shallow rotation moves...
Instruction Manual
Page 19
.... • 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) Interference Interference Desired signal [NB] 15 Variable range depends on the filter selection...
.... • 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) Interference Interference Desired signal [NB] 15 Variable range depends on the filter selection...
Instruction Manual
Page 20
... stations, are connected, select an antenna depending on the operating condition. ➥ Push [ANT(SET)] for 2 sec. When 2 antennas are near your location. ➥ Push [ATT] toggle the 20 dB attenuator function ON and OFF. • "ATT" appears when the attenuator is turned ON. ■ AGC time constant The AGC (Automatic Gain Control) controls receiver gain to toggle...
... stations, are connected, select an antenna depending on the operating condition. ➥ Push [ANT(SET)] for 2 sec. When 2 antennas are near your location. ➥ Push [ATT] toggle the 20 dB attenuator function ON and OFF. • "ATT" appears when the attenuator is turned ON. ■ AGC time constant The AGC (Automatic Gain Control) controls receiver gain to toggle...
Instruction Manual
Page 21
... audio pitch and monitored CW audio can be adjusted to suit your preferences (300 to select the 'CW PITCH' item. w P ush [UP Y] or [Z DN] to 900 Hz) without changing the operating frequency. to change the interference tone. r P ush [(ANT) SET] again to select CW mode. This reversal can be caused by incorrect TNC connections, settings, commands, etc. 5 RECEIVE FUNCTIONS ■ CW reverse mode CW-R (CW Reverse) mode receives...
... audio pitch and monitored CW audio can be adjusted to suit your preferences (300 to select the 'CW PITCH' item. w P ush [UP Y] or [Z DN] to 900 Hz) without changing the operating frequency. to change the interference tone. r P ush [(ANT) SET] again to select CW mode. This reversal can be caused by incorrect TNC connections, settings, commands, etc. 5 RECEIVE FUNCTIONS ■ CW reverse mode CW-R (CW Reverse) mode receives...
Instruction Manual
Page 25
... Scan edge One frequency and one mode in memory mode. w P ush [UP Y] or [Z DN] several times to select the desired memory channel. • Push and hold [UP Y] or [Z DN] for quickly changing to often-used frequencies. 6 MEMORY OPERATION ■ Memory channels The receiver has 101 memory channels. e Push [V/M] to VFO mode, push [V/M] again. r To return to select the desired memory channel. w P ush the desired memory channel number using...
... Scan edge One frequency and one mode in memory mode. w P ush [UP Y] or [Z DN] several times to select the desired memory channel. • Push and hold [UP Y] or [Z DN] for quickly changing to often-used frequencies. 6 MEMORY OPERATION ■ Memory channels The receiver has 101 memory channels. e Push [V/M] to VFO mode, push [V/M] again. r To return to select the desired memory channel. w P ush the desired memory channel number using...
Instruction Manual
Page 26
w S et the desired frequency and operating mode in memory mode. • To program a blank channel, use direct frequency entry with [UP Y] or [Z DN] in VFO mode. 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. [EXAMPLE]: Programming 21.280 MHz/CW into memory channel 12. e P ush [MW] for 2 sec. USB R X ANT 1 AGC S1 3 5 7 9 20...
w S et the desired frequency and operating mode in memory mode. • To program a blank channel, use direct frequency entry with [UP Y] or [Z DN] in VFO mode. 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. [EXAMPLE]: Programming 21.280 MHz/CW into memory channel 12. e P ush [MW] for 2 sec. USB R X ANT 1 AGC S1 3 5 7 9 20...
Instruction Manual
Page 29
... or low, in VFO mode. ■ Preparation • Channels For programmed scan/auto memory write scan: Program scan edge frequencies into memory channels 80 to resume or cancel when detecting a signal, in memory mode. When tuning step is stopped manually- See p. 31 for details. • Squelch condition ❍ Scan starts with squelch closed and then opened (scan resumes after 10 sec. SELECT MEMORY SCAN Repeatedly scans all programmed memory channels. MEMORY SCAN Repeatedly scans...
... or low, in VFO mode. ■ Preparation • Channels For programmed scan/auto memory write scan: Program scan edge frequencies into memory channels 80 to resume or cancel when detecting a signal, in memory mode. When tuning step is stopped manually- See p. 31 for details. • Squelch condition ❍ Scan starts with squelch closed and then opened (scan resumes after 10 sec. SELECT MEMORY SCAN Repeatedly scans all programmed memory channels. MEMORY SCAN Repeatedly scans...
Instruction Manual
Page 34
... is used for programming infrequently changed values or conditions of the S-meter can be set as open) or RF/squelch control. D Set mode operation q Push [(ANT) SET] to confirm it . to enter the set mode. • RF/squelch control The [RF/SQL] control can be turned OFF for silent operation. r Push [(ANT) SET] to select the desired item. See p. 14 for details. • Confirmation beep A beep sounds each time a switch is fixed...
... is used for programming infrequently changed values or conditions of the S-meter can be set as open) or RF/squelch control. D Set mode operation q Push [(ANT) SET] to confirm it . to enter the set mode. • RF/squelch control The [RF/SQL] control can be turned OFF for silent operation. r Push [(ANT) SET] to select the desired item. See p. 14 for details. • Confirmation beep A beep sounds each time a switch is fixed...
Instruction Manual
Page 39
.... 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 35 e R emove the connection cable (P1241) from the UT-106 to their original positions. UT-106 P1241 J3 P1241 J1231 J1221 ■ Optional IF filters Several IF filters are available for the IC-R75. 10...
.... 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 35 e R emove the connection cable (P1241) from the UT-106 to their original positions. UT-106 P1241 J3 P1241 J1231 J1221 ■ Optional IF filters Several IF filters are available for the IC-R75. 10...
Instruction Manual
Page 40
... set mode to their defaults. start . programmed. The displayed frequency • The dial lock function is blown. POWER RECEIVE PROBLEM POSSIBLE CAUSE Power does not come on • DC power cable is pushed. is improperly connected. speaker. • The squelch is closed. • Rotate [AF] clockwise to obtain a suitable listening level. • Rotate [RF/SQL] to 12 o'clock position to open . p. 2 p. 14 Sensitivity is low. • The antenna...
... set mode to their defaults. start . programmed. The displayed frequency • The dial lock function is blown. POWER RECEIVE PROBLEM POSSIBLE CAUSE Power does not come on • DC power cable is pushed. is improperly connected. speaker. • The squelch is closed. • Rotate [AF] clockwise to obtain a suitable listening level. • Rotate [RF/SQL] to 12 o'clock position to open . p. 2 p. 14 Sensitivity is low. • The antenna...