Yaesu FT-847 Operating Manual

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Contents

43FT-847 OPERATING MANUALTRANSMITTINGOPERATIONPOWER OUTPUT/ALC LEVEL MONITORINGDuring transmission, you have the option of monitor-ing RF power output (“PO” on the Meter) or relativeALC voltage (“ALC” on the Meter). The default set-ting for the Meter is PO, and the selection may beswitched to ALC via Menu #24. For initial setup, werecommend that you make this change now, then re-turn the setting to PO, if you like, once initial adjust-ments have been completed.To do this:Å Press the [MENU] switch momentarily to activatethe Menu mode.Ç Now rotate the SUB-TUNE control until Menu #24(“ TX MTR ”) appears.É If the current value is shown to be “PO,” rotate theMEM/VFO CH control so that “ALC” appears onthe display.Ñ Now press the [MENU] switch once more to lockin your new setting and exit the Menu mode. Nowproceed to the “SSB TRANSMISSION” section on thenext page.See page 82 for a complete description of Menu op-eration.Now that you are familiar with basic receiver opera-tion, we shall explore the FT-847’s capabilities in thetransmit mode.The transmitter can be activated within any of the 500-kHz segments (detailed below) which contain the HFamateur bands, as well as 50-54 MHz, 144-146 (or144-148) MHz, and 430-440 (or 450) MHz. Whentuned to any other frequency, the transmitter will bedisabled. Within the 500 kHz HF transmitting seg-ments, you (the control operator) are responsible forrestricting your transmissions to those frequency sub-bands on which you are authorized to operate. Attempt-ing to transmit outside an amateur band segment willcause the “ERROR” diagnostic message to appear onthe display.Important Note!Whenever you transmit, be certain to have asuitable antenna or 50Ω dummy load connectedto the antenna jack in use. Although the finalamplifier stage of this transceiver includes pro-tection circuitry which will immediately reducepower if no load is present, there still is a slightchance of damage to your equipment in the (un-likely) event of a catastrophic protection-cir-cuitry failure.Remember that there are four antenna jacks onthe rear panel of the FT-847, and each shouldbe connected to an antenna or dummy load inthe interest of long-term safety and reliability.