Operation
Automatic Antenna Tuner
There is an efficient ATU integrated inside the G90S radio to help you quickly
erect and debug antenna.
1. Press [TUNE] key in a short time to connect with
built-in antenna tuner. There will be an antenna icon
at the top of screen.
2. In the case that the antenna tuner is accessed, long
press and hold the [TUNE] key for 1s to start ATU
automatic tuning functions. IT will automatically
return to receiving state after the tuning.
Note:
1. Press [TUNE] key in a short time, and there will
be an antenna icon at the top of screen, indicating
that antenna tuning functions are enabled. The
functions are only enabled but not working.
2. After the antenna tuner is tuned, the antenna tuner
must remain to be open before the antenna tuner in
the machine is used.
3. If "SWR" icon is displayed at the top of the screen
and flashes once transmitting is enabled after the
tuning, it indicates that standing-wave of current
antenna is still large and tuning is required to be
carried out again.
4. Antenna tuning shall be turned off once natural
resonance of antenna reaches current frequency
band.
5. When a whip antenna is used and the internal
antenna tuning is started for tuning, strong radio
frequency interference may be caused to the unit or
electronic equipment.
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Standing-wave Scanner SWR
The G90S host has the antenna standing-wave scanning function, which can
scan the standing-wave parameters of the current antenna to help users adjust the
antenna.
1. Long press [POW] key to enable the
standing-wave scanning function. Scan the standing
wave of the antenna in the current frequency band.
2. press the key corresponding to BW displayed on
the screen in a short time to switch the frequency
stepping of scanning.
3. In the middle of the bottom of the screen, the
frequency of the lowest point of the scanned
standing wave is displayed.
4. Press the key corresponding to FAST/ SLOW
displayed on the screen in a short time to select the
scanning speed.
5. Press the key corresponding to QUIT displayed on
the screen in a short time to exit the standing-wave
scanner.
Corresponding relationship between keys:
BW: Corresponding to the [PRE] key
FAST: Corresponding to the [NB] key
QUIT: Corresponding to the [VN] key
♦
The scanning results from the standing-wave scanner may have some errors, for reference only of
temporary use. For accurate measurement of antenna standing waves and other data, please use the
professional antenna analysis equipment for measurement.
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