Yaesu FT-847 Operating Manual

Also see for FT-847: Technical supplement Technical supplement Technical supplement Modification

Contents

50 FT-847 OPERATING MANUALFM TRANSMISSIONOPERATIONFM operation is permitted on the bands above 29 MHz,and the FT-847 provides a wealth of features for AMsimplex and repeater operation. Several of these fea-tures may be customized for each band via the Menusystem.Use the “NARROW” mode for operation on 29 MHz, asthe permitted deviation below 30 MHz is one-half ofthat permitted on VHF or UHF. To do this, press the[NAR] key while operating in the FM mode.Please be certain to respect other amateurs by observ-ing the operating bandplans in your country, and donot use the FM mode in the sub-bands recognized asbeing reserved for SSB/CW “weak-signal” work.These sub-bands typically may include the frequencyranges 50.0 ~ 50.5 or 51.0 ~ 51.125 MHz, 144.0 ~144.5 MHz, and 432.0 ~ 432.6 MHz, but may beslightly different in your country. Satellite sub-bandsto avoid are 29.3 ~ 29.5 MHz, 145.8 ~ 146.0 MHz,and 435.0 ~ 438.0 MHz. The communications effec-tiveness of the amateur service requires the coopera-tion of all licensees, and operating bandplans haveevolved so as to minimize interference among opera-tors using incompatible emission modes such as FMand SSB.“CHANNELIZED” FREQUENCY NAVIGATIONYou may find that the MAIN VFO Tuning Dial is some-what inconvenient for FM operation, since most allstations operating in the FM mode use a “channelized”frequency, which is generally a multiple of either 5kHz or 6.25 kHz. Therefore, we recommend the useof the MEM/VFO CH knob for FM frequency tuning.The steps utilized by the MEM/VFO CH knob in theFM mode may be set independently for HF and foreach VHF and UHF band. Therefore, if you live in anarea where 10 kHz steps are used on 29 MHz and 50MHz FM, and 5 kHz steps are used on 144 MHz, and25 kHz steps are used on 430 MHz, you may wish toset these (or steps appropriate for your area) usingMenu #5:l Set the operating frequency to anywhere in theHF range (160 ~ 10m).l Press the [MENU] button to activate the Menumode of operation.l Rotate the SUB-TUNE knob to select Menu #05(“ FM-CH ”).l Rotate the MEM/VFO CH knob to select a newfrequency step. The available steps are 5/6.25/10/12.5/15/20/25 kHz.l Press the [MENU] key to exit the Menu mode.l Now set a frequency anywhere in the 50 MHzband.Press the [MENU] button to activate the Menumode, and repeat the above process to selectthe desired steps on 6 meters. Most likely, youwill want to choose either 5 kHz or 10 kHz steps,depending on where you live.l Repeat this procedure for the other bands by set-ting a frequency on 144 MHz, then selectingthe desired step. Press [MENU] to exit the Menumode, move to 430 MHz, then re-enter the Menuand set the desired step on the 70 cm band.