Yaesu FT-712RH Operating Manual
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Yaesu FT-712RH Operating Manual

Yaesu FT-712RH Operating Manual

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OPERATING
MANUAL
FT-712RH
YAESU MUSEN CO.,
LTD. C.P.O. BOX 1500
TOKYO, JAPAN

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Summary of Contents for Yaesu FT-712RH

  • Page 1 OPERATING MANUAL FT-712RH YAESU MUSEN CO., LTD. C.P.O. BOX 1500 TOKYO, JAPAN...

  • Page 2: Table Of Contents

    CONTENTS SUPPLIED ACCESSORIES . . Memory Storage Memory Recall Hiding/Erasing Memories OPTIONS ..Call Channel Memory SPECIFICATIONS ..Scanning Memory Skip Scanning CONTROLS & CONNECTORS Programmable Memory FRONT PANEL Scanning (PMS) REAR PANEL...
  • Page 3 YAESU FT-712RH COMPACT 70cm FM MOBILE TRANSCEIVER The FT-712RH is a compact, full-featured frequency synthesized FM mobile/base transceiver providing selectable power output of either 3 or 35 watts on the 70cm amateur band. Unique features include the optional DVS-1 Digital Voice System, which provides local and remote digital voice recording and playback when installed in the FT-712RH.

  • Page 4: Supplied Accessories

    Along with one microphone, the MMB-37 Reversible Mobile Bracket is supplied with the transceiver. For base station installations, the FP-700 AC Power Supply/External Speaker is optionally available. Please read this manual before installing or operating the FT-712RH. SUPPLIED ACCESSORIES MMB-37 Mobile Mounting Bracket 136000056 Power Supply Cable T9015615 with two 15A fuses, 2.8m One of the...

  • Page 5: Specifications

    SPECIFICATINS GENERAL RECEIVER Frequency range: Circuit type: see Model Chart Double-conversion superhet Channel steps Intermediate frequencies: 5/10/12.5/20/25 kHz 45 MHz & 455 kHz Standard repeater shift: Sensitivity (for 12dB SINAD): see Model Chart better than 0.18uV Mode of emission: Image ratio: better than 65dB Antenna impedance: Selectivity (-6/-60dB)

  • Page 6: Controls & Connectors

    CONTROLS & CONNECTORS FRONT PANEL Selector Knob This 24-position detented rotary switch is used for tuning as well as a wide variety of function selections. The DWN and UP keys on the microphone duplicate the functions of this knob. Push Button Switches These push buttons select the various operating features.
  • Page 7 Auto Dimmer Sensor Behind the glass is a photosensor which detects the level of ambient light, causing the display lamps to be automatically dimmed in the dark. VOL Control This control adjust the volume of the receiver audio. SQL Control This control sets the threshold level at which received signals (or noise) open the squelch.
  • Page 8 buttons are now disabled. Pressing [F]+LOCK again sounds high/low beeps as the lock condition is released. (9) Display The display segments are follows. The meaning of each is described elsewhere in this manual MIC Jack Pinout - 6 -...

  • Page 9: Rear Panel

    (2) EXT SP (External Speaker) Jack This 2-contact mini phone jack accepts a 4- to 16-ohm external speaker such as the Yaesu SP-3, SP-4 or SP-55. When a plug is inserted into this jack the internal speaker is disabled. (3) ANT (Antenna) Jack Connect a 70cm antenna to this type-N socket using 50-ohm coaxial cable and a type-N plug.

  • Page 10: Installation

    INSTALLATION Antenna Considerations The FT-712RH is designed for use with an antenna having an impedance near 50 ohms at the operating frequency. For optimum performance use a high-quality, carefully designed antenna. The antenna should be connected at all times when power is on, to avoid damage that can otherwise result if transmission occurs accidentally when no antenna is connected.
  • Page 11 To install the transceiver, position the transceiver in the bracket so that the clip on the left side fits into the slot in the left side of the bracket e 31, then push the right side of the transceiver upwards until it latches. To remove the transceiver place your hand underneath it and pull the latch on the right side of the bracket outward until the right side of the transceiver drops free.

  • Page 12: Mobile Power Connections

    Mobile Power Connections Before connecting the power cable the maximum battery charging voltage should be checked to ensure that it remains below 15V when the engine is run fast. If more than 15V, the voltage regulator of the car should be adjusted before connecting the transceiver.

  • Page 13: External Accessories

    Especially practical for the noisy mobile environment, each includes its own swivel-type mounting bracket, and is available from your Yaesu dealer. Also available to enhance safety and mobile operating convenience are the YH-I Headset with miniature boom microphone, and the full size MF-1A3B boom microphone with flexible arm (both of which use the SB-10 PTT switch).

  • Page 14: Base Station Installation

    EXT SP jack on the rear panel. Packet Radio TNC Interconnections Most popular packet radio tncs can be connected to the MIC jack of the FT-712RH as follows: TNC Jack to Radio...

  • Page 15: Dvs-1 Digital Voice System Installation

    DVS-I Digital Voice System Installation The DVS-I is a digital voice recording and playback system which allows you to record either through the microphone or the receiver, and to play back selected recorded messages through the speaker or transmitter. Remote-controlled recording and playback is also provided by a built-in DTMF decoder.
  • Page 16 (3) Connect the 8-pin plug from the DVS-I to 8-pin jack J2003 on the inside of the front panel (the gray wire should be nearest the center). See Figure (4) Connect the 7-pin plug from the DVS-I to 7-pin jack J2004 on the inside of the front panel (the brown wire should be nearest the center).

  • Page 17: Fts-12 Tone Squelch Unit Installation

    The FTS-12 provides either encode-only or encode/decode operation with 37 front panel selectable subaudible CTCSS tones, and is available for all versions FT-712RH, from your local Yaesu dealer. See the "Operation" section for functional details. (1) Perform steps 1 and 2 of the DVS-I Installation Procedure.

  • Page 18: Memory Cloning

    All memory data stored in one transceiver can be moved to another by connecting the MIC jacks together as indicated in the diagram below (cloning cable is NOT available from Yaesu). (1) Turn both transceivers off, and then press and hold the F/WRITE buttons while turning the power switches on.

  • Page 19: Modification For Packet Radio

    Modification for Packet Radio As supplied from the factory, pin 5 of the MIC jack is wired through solder bridge jumper no. 16 on the Control Unit to allow tone burst activation via the BURST button on the MH-14A8 microphone. For packet radio operation jumper 16 must be removed, disabling BURST control, and jumper 15 installed to provide output of the squelch BUSY line for packet radio tries.

  • Page 20: Operation

    OPERATION This chapter describes the various transceiver functions in detail. After studying these descriptions, keep the FT-712RH Operator's Quick Reference Charts handy in case you need to refresh your memory. Preliminary Operating Information Before operating the transceiver, recheck power supply and antenna connections.

  • Page 21: Frequency/Step Selection

    is not affected by the squelch setting, so even squelched signals will have some indication. If you notice more than one or two bargraph segments appearing while the squelch is still closed, try reducing the squelch control setting (if you want to hear weak signals).

  • Page 22: Transmitting

    Transmitting Press the LOW button to select low power output. When you wish to transmit, wait until the channel is clear ("BUSY" not displayed), and squeeze the PTT switch on the microphone. During transmission "ON AIR" is displayed in reverse letters to the left of the S&PO box, and the bargraph shows relative transmitter power output.

  • Page 23: Memory Storage

    Memory Storage The FT-712RH offers eighteen general purpose memories, numbered 1 through 18, and three special memories, labelled C, L and U. The general purpose memories and the "C" (Call Channel memory) can each store separate receive and transmit frequencies or repeater shift, and tone squelch data (if the optional FTS- 12 is installed).

  • Page 24: Memory Recall

    then hold the PTT switch while pressing F/WRITE once more (the transmitter is not activated in this case). By either method the results will be the same in operation, except that storing a separate transmit frequency applies only to one memory, while the offset method applies to all (when the RPT button is pressed).

  • Page 25: Call Channel Memory

    masking certain memories so that they are completely hidden from operation, and recalling them only when desired for operation. To completely mask a memory, recall it and press F/WRITE for 2-second (until the memory number blinks). Then press the REV/STEP button. This causes the display to change to memory 1, and the previously-selected memory is no longer selectable manually, or by scanning (as described later).

  • Page 26: Memory Skip Scanning

    [F]+SKIP. Programmable Memory Scanning (PMS) In addition to band and memory scanning, the FT-712RH can scan between two frequencies of your choice stored in the special memories labelled "L" and "U": (1) Store the lower edge of the desired scanning range in memory L, and the upper edge in memory U.

  • Page 27: Priority Monitoring

    You can now tune or scan as described previously, between the nearest multiples of 100 kHz (xxx.000, xxx.100, xxx.200, etc.) below memory L and above memory To cancel PMS operation, stop scanning, if necessary (with the microphone keys or D/MR), and press D/MR: once to return to regular memory operation, or twice to return to Dial mode.

  • Page 28: Tone Squelch Operation

    Note that you can use any other memory as a priority channel in place of memory 1 in the above procedure when operation is to be on the Dial. Tone Squelch Operation The FT-212RH includes a CTCSS encoder (for transmitting), and can also be used to silently monitor for calls on busy channels when the optional FTS-12 Tone Squelch Unit is installed.

  • Page 29: Dvs-1 Digital Voice System

    DVS-1 DIGITAL VOICE SYSTEM The DVS-1 is a combination of the latest microprocessor-controlled PCM (pulse- code modulation) digital voice recording and memory circuitry and digital DTMF decoder, allowing recording either from the microphone or of received signals, and playback through the loudspeaker or on the air. A one-megabit RAM (random access memory) on the DVS-1 can be used as a single block for up to 128 seconds of recording, or divided into four or eight segments for selective recording and playback.

  • Page 30: Voice System Display

    Voice System Display When the DVS-1 is installed in the transceiver, it is toggled on and off by pressing the VOICE button. When the DVS-I is on, the display shows the following format: (1) Rec. (Recording) Mode ("S" or "M") This is either "S"...
  • Page 31 displayed fait Rate is blinking) allows selection of the different rates. (3) Segmentation Code (0 - 9 or A - F) The character displayed here indicates both the segmentation method and segment selection of the 8-segment digital memory for recording and playback, as follows: Segments 2 through 8 combined Segment 1 (Callsign) only Individual Segment access...

  • Page 32: Segmentation Codes

    (6) Rec. Lock ("L" or blank) "L" is displayed here when the displayed Segmentation Code has been Locked to prohibit recording (BOTH local and remote). The description of Play Lock above describes how to select the Lock status. The record lock status can be changed remotely.
  • Page 33 To record your callsign: (1) Turn on the radio, and press VOICE to activate the DVS-I. (2) Press the TONE button, if necessary, so that "M" is displayed at the left (to select Microphone recording). (3) Note the number (1 - 4) displayed just to the right of the "M", signifying the bit rate.

  • Page 34: Playback

    Dress the DWN button again to play back this recording. You will notice t sounds a little 'scratchy'. Bit rates 3 and 4 provide even longer recording times, but sound even more scratchy (go ahead and try them). If you find you have a lot of left-over time (as indicated on the S-meter), press any microphone button to stop recording.
  • Page 35 (1) Press VOICE (if displaying frequency) to activate the DVS-1. (2) Note the indicated Bit Rate, and change it, if desired, by pressing the REV button, turning the tuning knob to select the desired Bit Rate, and pressing REV again. (3) Press the RPT button (the display will show simply "R"...
  • Page 36 REMOTE Func. Name DTMF Code Note Description Reset Cancel input or stop recording Check Empty Check for unused segment(s) Record All Record segments 2 through 8 Record One Record in any (unlocked) segment * it Bit Rate Set Bit Rate r (l - 4) for recording Confirm Playback last recording to confirm Lock Last...

  • Page 37: Locking Segments

    Locking Segments You may record some segments that you don't want played back over the air during remote access. These can be Locked out locally by pressing the MHz button when the DVS-1 is in its normal (non-remote) mode. Pressing MHz once locks out both recording and playback, indicated by an "L"...

  • Page 38: Private Station Id Code

    Private Station ID Code Obviously, the remote recording system just described could be a prankster's delight, so a special private station ID code is also programmable in the DVS-1 to prevent anyone from accessing the memories who does not know your ID code. Your ID code may be any number from 0001 to 9999.

  • Page 39: Cat System External Computer Control

    CAT System External Computer Control The CAT (Computer Aided Transceiver) System in the FT-712RH allows external control of the operating frequency, transmit/receive switching and high/low transmit power selection from an external personal computer. Also, if the optional FTS-12 CTCSS Unit is installed, the CTCSS tone frequency and encode/decode status of the tone squelch system can be selected.
  • Page 40 Data Format for 1 Block (5 Characters) There are five types of instruction opcodes for the FT-712RH listed in the Instruction Code Chart on the next page. Notice that three of the instructions require no arguments. However, every Command Block sent to the transceiver must always consist of five bytes.
  • Page 41 CTCSS TONE CODES Freq. Value Freq. Value Freq. Value (Hz) (Hex) (Hz) (Hex) (Hz) (Hex) 136.5 2 Fh 241.8 1 Fh 67.0 3 Eh 141.3 2 Eh 250.3 1 Eh 71.9 146.2 C67.0* 1 Dh 77.0 151.4 C71.9 l Ch 82.5 156.7 C74.4...

  • Page 42: In Case Of Problems

    In Case of Problems FT-712RH operation is not complicated, but it is still possible to get lost, at least until you have had the chance to learn the various functions of the keypad and display. If the display shows nothing at all, check the power switch, and the power supply connections.

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