Kenwood TS-480HX Operation Manual - Page 36

AM TRANSMISSION Each mode used on the HF Amateur bands has its own advantages. Although long distance DX contacts may be less common while using AM, the superior audio quality characteristic of AM operation is one reason why some hams prefer this mode. When looking for others operating on AM, check the following frequencies first: 3885 kHz, 7290 kHz, 14286 kHz, 21390 kHz, and 29000 ~ 29200 kHz If necessary, refer to "OPERATING BASICS", beginning on page 18, for details on how to receive. 1 Select an operating frequency. 2 Press [MODE] until "AM" appears. • If "AM" does not appear, select "FM" first, then press [MODE] (1 s). The mode indicator changes to "AM". 6 BASIC COMMUNICATIONS NARROW BANDWIDTH FOR FM Select wide band or narrow band TX deviation depending on whether the other station is using wide band or narrow band filter for FM mode. While "NAR" appears, the TS-480 transceiver transmits signals in narrow band FM but the reception IF filter bandwidth remains unchanged (Wide). The deviation selection is crucial to avoid audio distortion or insufficient intelligibility that the other station will encounter. 1 Press [MODE] until "FM" appears. • If "FM" does not appear, select "AM" first, then press [MODE] (1 s). The mode indicator changes to "FM". 2 Press [FIL/ NAR] (1 s) to toggle the selection between wide and narrow TX deviation. • "NAR" appears when the narrow TX deviation is selected. 3 Press [MIC/ 5/ RF.G] to enter the Microphone gain adjutment mode. • The current gain level appears on the subdisplay. 4 Press and hold Mic [PTT]. • The LED lights red. • Refer to VOX function for information on automatic TX/ RX switching {page 36}. 5 Speak into the microphone and adjust the MULTI control so that the power meter slightly reflects your voice level. • Speak in your normal tone and level of voice. Speaking too close to the microphone or too loudly may increase distortion and reduce intelligibility at the receiving end. • You may want to use the Speech Processor. Refer to "SPEECH PROCESSOR" {page 37} for details. 6 Release Mic [PTT] to return to Reception mode. • The LED lights green or turns off, depending on the SQL control position. 7 Press [MIC/ 5/ RF.G] to exit the Microphone gain adjustment mode. Refer to "COMMUNICATING AIDS", beginning on page 34, for information on additional useful operation functions. Note: When the TX power meter reading exceeds the value that you specified in TX Power setting {page 65}, decrease the microphone gain or adjust your tone and level of voice. NARROW BANDWIDTH FOR AM When receiving AM, you can further decrease the bandwidth to eliminate interference. However, the transmission deviation of AM is not affected by this selection. 1 Press [MODE] until "AM" appears. • If "AM" does not appear, select "FM" first, then press [MODE] (1 s). The mode indicator changes to "AM". 2 Press [FIL/ NAR] (1 s) to toggle the selection between Normal and Narrow. • "NAR" appears when the narrow bandwidth is selected for the AM reception. 28