Yaesu CT-39A Operating Manual

23FT-8800R Operating ManualBASIC O PERATIONTRANSMISSIONTo transmit, simply close the PTT (Push To Talk) switch on the microphone.The FT-8800R will transmit only on the “Main” band. During transmission, the “ ”icon will appear at the upper right of the “Main” frequency field on the display.Changing the Transmitter Power LevelYou can select from among a total of four transmit power levels on your FT-8800R.To change the power level, press the [LOW] key to select one of four power settings. Thesepower levels will be stored, in memory registers, atthe time of memory storage (see page 32 for detailson Memory operation).During transmission, the Bar Graph will deflect in the display, according to the power out-put selected.You may change the power level on the “Main” band using the microphone’s [P4]key.LOW5 WMID 210 WMID 120 WHIGH50 W: 144 MHz35 W: 430 MHzNoticeThe FT-8800R may receive very strong signals on the Image frequency, and/or the receiversensitivity may be somewhat reduced by the combination of the “Left” and “Right” bandfrequencies while Full Duplex operation is engaged.If you experience interference that you suspect may be coming in via a frequency “Mix,” youmay calculate the possible frequencies using the formulas below. This information may beused in the design of effective countermeasures such as traps, etc. “Right” band 144 MHz TX freq. – 100.35 MHz =“Left” band IF freq. or “Left” band 2nd IF freq. Image 144 MHz TX freq. x n1 – (430 MHz RX freq.– 45.05 MHz) x n2 =“Left” band IF freq. or “Left” band 2nd IF freq. Image 144 MHz TX freq. x n1 – (430 MHz RX freq.– 45.05 MHz) x n2 + 11.15 MHz =“Left” band IF freq. or “Left” band 2nd IF freq. Image 430 MHz TX freq. x n1 – (144 MHz RX freq.+ 45.05 MHz) x n2 =“Left” band IF freq. or “Left” band 2nd IF freq. Image(n is an integer: 1, 2, 3, …)