User manual YAESU FT-847

[. . . ] FT-847 OPERATING MANUAL YAESU MUSEN CO. , LTD. 4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan YAESU U. S. A. 17210 Edwards Rd. , Cerritos, CA 90703, U. S. A. YAESU EUROPE B. V. P. O. Box 75525 1118 ZN, Schiphol, The Netherlands YAESU UK LTD. Unit 12, Sun Valley Business Park, Winnall Close Winchester, Hampshire, SO23 0LB, U. K. YAESU GERMANY GmbH Am Kronberger Hang 2, D-65824 Schwalbach, Germany YAESU HK LTD. 11th Floor Tsim Sha Tsui Centre, 66 Mody Rd. , Tsim Sha Tsui East, Kowloon, Hong Kong Table of Contents General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Accessories & Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] For nighttime use, the MH-36D8 includes a back-lighting feature which may be activated by turning the microphone's [LAMP] key on. Important Notes Regarding CTCSS and DCS Decoder Operation Because your FT-847's receiver will be silent during CTCSS or DCS Decoder operation, you must be certain that the current operating frequency is not occupied before you transmit. The display's "BUSY" icon responds to the presence of a carrier, and ignores any tones present. So if you do not hear any speech audio in your speaker, but see the "B U S Y " icon on the display, this indicates that a station using a different CTCSS Tone or DCS Code is currently using the frequency. Wait until the other station's transmission is completed (the "BUSY" icon will disappear) before making your transmission. If the "BUSY" icon does not disappear within a reasonable time period, disable the Decoder in use to be certain that the front panel's SQL control is properly silencing background noise. 54 FT-847 OPERATING MANUAL OPERATION FM TRANSMISSION CROSS-BAND REPEATER OPERATION The FT-847 can be set up to operate as a one-way "range extender, " using the Menu system. This feature is useful for emergency portable work in a remote area to extend the range of a dual-band hand-held transceiver. However, please remember these points before using the cross-band repeater function: l Check the amateur radio rules and regulations for your country, to ensure that this type of operation is permitted. l Pick your frequency pair carefully, so as not to cause harmful interference to other users. The use of cross-band repeaters has the potential to cause serious disruption of communications circuits, and the creation of harmful interference is inconsiderate and may be illegal!If you are not sure of active repeater frequencies in your area, a safe rule is to stay off of the repeater sub-bands and use the FM simplex portion of each band. l Remember that the transmit duty cycle will be much higher during repeater service, so we recommend that the transmit power level be set to 25 Watts or lower, to ensure cooler operation. l Transceiver CTCSS or DCS Encode/Decode settings may, of course, be activated, allowing selective calling for your cross-band repeater. However, keep in mind that, if the channels you use are so busy as to motivate you toward CTCSS/DCS decoding, you may not have chosen a good frequency pair on which to operate, as the potential for interference to other users is high. Here is the procedure for setting up cross-band repeater operation: · Press the [SAT] switch to activate "Satellite" operation. , Set the desired transmit frequency into the Sub VFO, and the desired receive frequency into the Main VFO. Rotate the MEM/VFO CH knob to set this feature to "ON. " Press the [MENU] key to exit the Menu mode. During cross-band repeater operation, the [RX(HOME)], [TX(VFO/M)], and [A u B] keys are t all functional, for control of the uplink and downlink frequency relationships. Note: The cross-band repeat function (Menu #41) can only be initiated while the"Satellite" mode is activated. If the "Satellite" mode is not activated, the Menu system will not allow Menu #41 (X RPT) to be set to the "ON" position. To exit the cross-band repeater mode, press [SAT] swicth momentarily, or re-enter the Menu, and set Menu #41 to "OFF. " FT-847 OPERATING MANUAL 55 OPERATION FM PACKET OPERATION The FT-847 may easily be configured for 1200 or 9600 bps packet operation. · Refer to page 17, and connect your TNC (Terminal Node Controller) to the rear panel's PKT jack, per the instructions on that page. , Set the FT-847 to the desired band, and press the [FM/AM] mode key, as necessary, to select the "FM" operating mode. Note that there is no "Packet" mode activated via the front panel; the "Packet" mode is recognized when the microprocessor detects PTT control commands sent via the PKT jack. [. . . ] . ) following the "CQ" call, indicating how many kHz up from the TX frequency you are listening. According to this system, "CQA" means you will listen "Up 1 kHz" while "CQB" means "Up 2 kHz, " "CQE" means "Up 5 kHz, " and "CQZ" means "Up 26 kHz. " If you are calling "CQE" and hear a response to your call 5 kHz up, you then press the [AuB] key to QSY to the "E" frequency, where the QSO is completed. Set the Main and Sub VFOs to the same frequency, which should be 2000 Hz (2. 00 kHz) lower than the "schedule" or "operating" frequency. This will make the zero beat frequency of your 2000 Hz transmitted CW correspond to the "schedule" frequency. If you are sending a 1500 Hz tone, instead, set the VFOs to a frequency 1500 Hz below the "schedule" frequency, etc. [. . . ]