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Icom IC-R75 Instruction Manual

Manual is about: Communications Receiver

Summary of IC-R75

  • Page 1

    Instruction manual communications receiver ir75.

  • Page 2

    I important read this instruction manual carefully before attempting to operate the re- ceiver. Save this instruction manual. This manual contains important safety and operating in- structions for the ic-r75. Explicit definitions r never apply ac to the [dc13.8v] jack on the re- ceiver rear panel. T...

  • Page 3: Table of Contents

    1 1 table of contents important .............................................................. I explicit definitions ........................................... I precautions ......................................................... I supplied accessories ...................................... I 1 ...

  • Page 4: Front Panel

    ■ front panel q power switch [power] ➥ push momentarily to turn power on. • turn the optional dc power supply on in advance. ➥ 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 d...

  • Page 5

    3 2 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 in- dication. ➥ select a filter set mode contents while in filter set mode. !2 memory wri...

  • Page 6: Front Panel

    4 2 panel description ■ front panel (continued) !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 optio...

  • Page 7: Function Display

    ■ function display 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 dsp unit is in- stalled. E automatic notch filter indicator (p. 20) appears when the optional automatic notch filter is in use. R noise ...

  • Page 8: Rear Panel

    6 2 panel description ■ rear panel q recorder remote jack [rec remote] controls the running of a tape recorder for record- ing. 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 ...

  • Page 9: Grounding

    ■ grounding to prevent accidents involving electricity and interfer- ence 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 be- tween the [gnd] terminal and gro...

  • Page 10: Connections

    8 3 installation and connections fil ts cw/rtty fm ssb am phones power rf/sql twin pbt af communications receiver dn up 1 2 abc 3 def 4 z 5 jkl 6 mno 7 prs 8 tuv 9 wxy . 0 z ent v/m mw sel scan clr lock agc nb anf nr att p.Amp set clock ant ad-55/a/v or opc-869 headphones remote (p. 9, 32) used for ...

  • Page 11: Tape Recorder Connections

    ■ tape recorder connections ■ transceive function 9 3 installation and connections pl-259 connector installation example 30 mm 10 mm (soft solder) 10 mm 1–2 mm solder solder soft solder coupling ring slide the coupling ring down. Strip the cable jacket and soft solder. Slide the connector body on an...

  • Page 12: Connecting to A Pc

    10 3 installation and connections ■ connecting to a pc 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 ...

  • Page 13: Frequency Setting

    4 11 frequency setting ■ read me first the receiver uses memory channels for storage of fre- quencies (as well as mode, tuning steps, etc.). When turning power off or changing memory channels, the previously displayed frequency cannot be recalled un- less it has been stored into a memory channel. Th...

  • Page 14: Frequency Setting

    12 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 ...

  • Page 15: Dial Lock Function

    13 4 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 tun- ing dial. Push [ts] one or more times until the 1 mhz tuning step indicator, “ " ,” appears above the 1 mhz indica- tor. Usb r x blank blank s1 3 5...

  • Page 16: Receive Functions

    5 14 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). ➥ push [ssb] to toggle between lsb and usb. ➥ push [cw/rtty] momentarily to toggle between cw an...

  • Page 17: Twin Pbt Operation

    15 5 receive functions ■ twin pbt operation the twin pbt (passband tuning) function electroni- cally narrows the if passband widths to reduce inter- ference. Moving both [twin pbt] controls to the same position shifts the if. Variable range depends on the filter selection. ±1.29 khz in 15 hz steps a...

  • Page 18: Preamp

    16 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. ➥ push [p.Amp] to toggle between preamp-1 and preamp-2 or turn the preamp off. ■ attenuator the attenuator preve...

  • Page 19: Cw Reverse Mode

    17 5 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. Use when interfering signals are near a desired signal and you want to change the interference tone. Q push [cw/rtty] once or twice to select cw mo...

  • Page 20: Filter Selection

    18 5 receive functions ■ filter selection the filter selection switches the if passband width as shown in the table at right. 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 co...

  • Page 21: Filter Set Mode

    19 5 receive functions ■ filter set mode when an optional filter is installed, set the optional fil- ters in filter set mode. Optional filters are not selected by default. D optional filter setting q push [fil] for 2 sec. To enter filter set mode. • if a blank memory channel has been selected, push ...

  • Page 22: Optional Auto Notch Function

    20 5 receive functions ■ optional auto notch function when an optional ut-106 is installed (dsp appears in the function display), an auto notch function can be used. The function automatically attenuates more than 3 beat tones, tuning signals, etc., even if they are mov- ing. The auto notch function...

  • Page 23: Memory Channels

    ■ 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 select...

  • Page 24: Memory Channel Programming

    Memory channel programming can be preformed ei- ther in vfo mode or in memory mode. ■ memory channel programming 22 6 memory operation d programming in memory mode 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 ...

  • Page 25: Frequency Transferring

    ■ frequency transferring the frequency and operating mode in a memory chan- nel can be transferred to the vfo. Frequency transferring can be performed in either vfo mode or memory mode. 23 6 memory operation d transferring in memory mode this is useful for transferring frequency and operating mode w...

  • Page 26: Memory Clearing

    ■ memory clearing ■ memory names 24 6 memory operation all memory channels (including scan edges) can be tagged with alphanumeric names of up to 8 charac- ters each. Letters (capitals except ‘o’), numerals and spaces can be used. Numerals can only be used for the 7th and 8th digits. D turning memory...

  • Page 27: Scan Types

    ■ scan types 7 25 scans ■ preparation • channels for programmed scan/auto memory write scan: program scan edge frequencies into scan edge mem- ory channels p1 and p2. For memory scan: program 2 or more memory channels except scan edge memory channels. For select memory scan: designate 2 or more memo...

  • Page 28: Programmed Scan Operation

    26 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 scan- ning. 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 squ...

  • Page 29: Priority Watch Operation

    27 7 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/s...

  • Page 30: Setting The Current Time

    ■ setting the current time the receiver has a built-in 24-hour clock with power- off and power-on timer functions. This is useful when logging swl’s, bcl’s and so on. Q push [clock] to select clock indication mode. • current time and “cl” appear. W push [ (ant) set] for 2 sec. To enter time setting ...

  • Page 31: Setting Power-Off Time

    29 8 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. E push [ (ant) set] for 2 sec. To ...

  • Page 32: Set Mode

    9 30 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 pus...

  • Page 33

    31 9 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 f...

  • Page 34

    32 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 re- ceiver has its own icom standard address in hexa- decimal code. The ic-r75’s address is 5ah. When 2 or more ic-r75’s are connected to an op- ...

  • Page 35

    33 9 set mode • speech speed when the optional ut-102 voice synthesizer unit is installed, you can select between faster or slower syn- thesizer 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, frequenc...

  • Page 36: Option Installations

    10 34 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. Caution: disconnect the dc power cable from the receiver before performing any work on the receiver. Otherwise, ...

  • Page 37: Ut-106

    35 10 option installations ■ ut-106 dsp unit ■ optional if filters 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 ...

  • Page 38: Resetting The Cpu

    ■ resetting the cpu 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 whi...

  • Page 39: Fuse Replacement

    37 11 maintenance 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. Q remove the top cover as shown on p. 34 w replace the circuitry fuse as shown in the diagram at right. E repl...

  • Page 40: Specifications

    D general • frequency coverage : 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 : 101 (99 regular, 2 scan edg...

  • Page 41: Options

    13 39 options fl-100, fl-101, fl-103, fl-223 and fl-232 9 mhz 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, fl-53a, fl-96, fl-222 and fl-257 455 khz fi...

  • Page 42: Control Command

    14 40 control command • 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 communi- cations interface-v (ci-v) controls the following func- tions of the receiver. Up to 4 icom ci-v transc...

  • Page 43

    41 14 control command • command table sub command command description — 00 send frequency data same as command 06 same as command 06 01 send mode data — 02 read band edge frequencies — 03 read operating frequency 04 read operating mode — 05 set frequency data 00* 1 01* 1 02* 1 03* 1 04* 1 05* 1 07* ...

  • Page 44

    42 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 off u preamp preamp 1 i antenna selection ant1 o memory name dxspot 1 note: when reading d...

  • Page 45

    43 14 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) note: when reading data, w is not required. • set mode data table q f e f e 5 a e 0 1 a 0 2 2 1 0 1 f d 8 0 w 0 1 type...

  • Page 46

    Count on us! 6-9-16 kamihigashi, hirano-ku, osaka 547-0002 japan a-5580h-1ex- e printed in japan © 1999 icom inc..