Kenwood TS-480 Manual Do Utilizador
20
Auxiliary Features
In addition to the basic TX/RX circuitry already described, the TS-480 is equipped with a number of
auxiliary features of considerable practical benefit. What follows is an introduction to some of
these.
auxiliary features of considerable practical benefit. What follows is an introduction to some of
these.
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Full compatibility with digital modes (data modes)
PSK31 and RTTY operations can now be performed with ease using PC software. The TS-480
has been designed to make it easy to use such digital modes.
has been designed to make it easy to use such digital modes.
External audio input/output terminals, separate from the mic and speaker terminals, are provided.
For each of these the level can be adjusted in ten steps.
For each of these the level can be adjusted in ten steps.
You can select special AF DSP filters for use with digital modes. Specially provided for PSK31
use is the choice of either a 1000Hz or 1500Hz beat frequency.
use is the choice of either a 1000Hz or 1500Hz beat frequency.
With the optional CW filters installed, you can choose between them even during SSB reception,
which we have had many requests for.
which we have had many requests for.
It is possible to switch the VOX function so that it will respond either to mic input or to an external
audio signal. No special standby wiring is needed for making digital use of this VOX function.
audio signal. No special standby wiring is needed for making digital use of this VOX function.
When transmitting voice with PTT, external input signals are muted. Conversely, when
transmitting using an external input, the mic input is muted; thanks to this feature, there is no
need to disconnect the mic during digital mode operations. (Note that if you put an external input
on standby using the mic PTT, it will not be modulated; sometimes users have queried as a
possible fault, but it is not.)
transmitting using an external input, the mic input is muted; thanks to this feature, there is no
need to disconnect the mic during digital mode operations. (Note that if you put an external input
on standby using the mic PTT, it will not be modulated; sometimes users have queried as a
possible fault, but it is not.)
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Features useful for 50MHz operations
You discover a DX CW signal during a USB band search! The TS-480 has a feature that is
perfect for such times: you can automatically switch to CW transmission by just keying the
transmitter (key down) with your CW key, keyer or CW computer program.
perfect for such times: you can automatically switch to CW transmission by just keying the
transmitter (key down) with your CW key, keyer or CW computer program.
When scanning 50.110~50.150 with the SSB program scan, if you want to watch carefully at
10kHz intervals just use a slower scan speed. This is also possible with memory scan, but in that
case you cannot hear frequencies in between. This allows you to set the scan speed slower by
up to 5 points for selected frequencies.
10kHz intervals just use a slower scan speed. This is also possible with memory scan, but in that
case you cannot hear frequencies in between. This allows you to set the scan speed slower by
up to 5 points for selected frequencies.
The noise blanker, which has a reputation for being very effective in combating even weak noise,
is now even better: we have added the ability to adjust the threshold level.
is now even better: we have added the ability to adjust the threshold level.
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Features useful for mobile operations
The TS-480 is equipped with a newly developed DNL (digital noise limiter). Although the principle
and operation of this DNL is quite different, the effect is somewhat like the old ANL (audio noise
limiter). Pulse noise is handled by a standard noise blanker, but if you find this is not working very
well as a result of a strong signal overlap or because of different types of noise, you should give
the DNL a try. In some cases, by processing audio signals with the DSP one can effectively
eliminate pulse noise. For details, see the DSP section.
and operation of this DNL is quite different, the effect is somewhat like the old ANL (audio noise
limiter). Pulse noise is handled by a standard noise blanker, but if you find this is not working very
well as a result of a strong signal overlap or because of different types of noise, you should give
the DNL a try. In some cases, by processing audio signals with the DSP one can effectively
eliminate pulse noise. For details, see the DSP section.