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33
8 COMMUNICATING AIDS
MONITORING TRANSMITTED SIGNALS
While operating in the SSB, FM, or AM mode,
monitoring your transmitted signals is a good method for
judging intelligibility by other stations. You may use this
function, for example, while selecting an optimum TX
equalizer profile.
Use Menu No. 47 to select 1 to 9. The larger the
number, the greater the monitor volume. The default is
OFF.
Note:
◆
When the monitor volume is high or the Speech Processor is ON,
speaker output audio may be picked up by your microphone,
resulting in a howling phenomenon. Use headphones if this
happens.
◆
Audio picked up before the modulation is output from the
speaker. So the quality of this audio slightly differs from the
quality of audio which other stations will hear.
◆
This function is not available in the CW or FSK mode.
◆
The position of the
AF
control does not affect the monitor volume.
TRANSMIT INHIBIT
Transmit Inhibit prevents the transceiver from being
placed in the transmit mode. No signals can be
transmitted if this function is ON.
• TX Inhibit OFF:Transmissions are possible.
• TX Inhibit ON: Transmissions are not possible.
Switch the function ON or OFF via Menu No. 38. The
default is OFF.
CHANGING FREQUENCY WHILE TRANSMITTING
Moving your frequency while transmitting is usually an
unwise practice due to the risk of interference to other
stations. However, if necessary, by using the Tuning
control you can change the operating frequency while
transmitting. You also can change the XIT offset
frequency in the transmit mode.
While transmitting, if you select a frequency outside the
transmit frequency range, the transceiver is
automatically forced to receive mode. If you selected
transmit mode by pressing [SEND], transmission will
not resume until you select a frequency inside the
transmit frequency range, and you press [SEND] again.
CUSTOMIZING TRANSMIT SIGNAL
CHARACTERISTICS
The quality of your transmitted signal is important
regardless of which on-the-air activity you pursue.
However, it’s easy to be casual and overlook this fact
since you don’t listen to your own signal. The following
sub-sections provide information that will help you tailor
your transmitted signal.
■
Changing Transmit Bandwidth (SSB/AM)
Use Menu No. 13 to change the transmit bandwidth
between 2.4 kHz (normal) and 2.0 kHz (narrow).
The default is 2.4 kHz.
■ Equalizing Transmit Audio (SSB/FM/AM)
Use Menu No. 14 to change the transmit frequency
characteristics of your signal. You can select from
five different transmit profiles including the default flat
response . Selecting any of the following items from
the Menu causes “TX EQ.” to appear on the display.
• High boost (Hb):
Emphasizes higher audio frequencies; effective
for a bassy voice.
• Formant pass (FP):
Improves clarity by suppressing audio
frequencies outside the normal voice frequency
range.
• Bass boost (bb):
Emphasizes lower audio frequencies; effective
for a voice with more high frequency
components.
• Conventional (c):
Emphasizes by 3 dB frequencies at 600 Hz and
higher.
Note:
◆
“U” selectable in Menu No. 14 is not currently available. The
menu includes this selection because of a possible future
enhancement.
◆
The figure above is given for your better comprehension. The
actual profiles will be affected by factors such as the transmit IF
filters.
0.7
2.2
Amplitude
Audio
frequency
(kHz)
Bass boost
High boost
Off
Conventional
Formant pass
2.4 kHz (Normal)
2.0 kHz (Narrow)
300 Hz
500 Hz
2.7 kHz
2.5 kHz
Higher Cut-off
Frequency
Bandwidth
Lower Cut-off
Frequency