Kenwood TS-570D - Manual (Page 28)

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6 BASIC COMMUNICATING
FM TRANSMISSION
FM operation on HF frequencies solves the problem of
how to have long distance voice communication with
the finest audio quality. When combined with the full-
quieting aspect of FM signals that suppress background
noise on the frequency, FM can be the best method for
maintaining regular schedules with friends.
Refer, if necessary, to “OPERATING BASICS”
beginning on page 13 for receiving details.
1 Select the operating frequency.
2 Press [FM/AM] to select FM mode.
• “FM” appears.
3 Press and hold down Mic [PTT], or press [SEND].
• “RX” disappears and “TX” appears.
• Refer to “VOX” {page 31} for information on
automatic TX/RX switching.
4 Speak into the microphone in a normal tone and
level of voice.
• Speaking too close to the microphone, or too
loudly, may increase distortion and reduce
intelligibility.
• Microphone gain can be switched between low
and high for FM using Menu No. 17. Low is
usually appropriate; however, select high if
reports from other stations indicate that your
audio is weak. The MULTI/CH control has no
effect in FM mode.
TX DEVIATION SELECTION
Select wide band or narrow band TX deviation
depending on whether the other station is using wide
band or narrow band RX deviation. This selection is
crucial to avoid audio distortion or insufficient
intelligibility that the other station will encounter.
1 Press [FM/AM] to select FM mode.
2 Press [FILTER].
• The current filter selection appears.
3 Turn the MULTI/CH control to select Wide
(“FM-WID”) or Narrow (“FM-NAR”).
4 Press [FILTER] to complete the setting.
Refer to “COMMUNICATING AIDS” beginning on
page 29 for additional information about useful functions
for operating.
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 prefer this mode.
When looking for others using AM, check the following
frequencies first:
• 3885, 7290, 14286, 21390, and 29000~29200 kHz
Refer, if necessary, to “OPERATING BASICS”
beginning on page 13 for receiving details.
1 Select the operating frequency.
2 Press [FM/AM] to select AM mode.
• “AM” appears.
3 Press [MIC] to activate the Microphone Gain Setting
function.
• The current gain level appears.
4 Press and hold down Mic [PTT], or press [SEND].
• “RX” disappears and “TX” appears.
• No transmit carrier level adjustment is necessary.
• Refer to “VOX” {page 31} for information on
automatic TX/RX switching.
5 Speak into the microphone and adjust the
MULTI/CH control so that the calibrated power meter
slightly reflects according to your voice level.
• Speak in a normal tone and level of voice.
Speaking too close to the microphone, or too
loudly, may increase distortion and reduce
intelligibility.
• You may want to use the Speech Processor.
Refer to “SPEECH PROCESSOR” {page 32} for
details.
6 Release Mic [PTT], or press [SEND] again, to return
to the receive mode.
• “TX” disappears and “RX” appears.
7 Press [MIC] to quit the Microphone Gain Setting
function.
Refer to “COMMUNICATING AIDS” beginning on
page 29 for information about additional useful functions
for operating.