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XIEGU G90 CHEAT SHEET 

 

 

 

 

 

 

 

 

 

 

 

 

 

‘TUNE’ Button 

Antenna Tuner

 

 

A short press just enables the tuner to be used. But the actual antenna tuning is not initiated.. so 
the tuner is at its setting when it last actually completed a tuning action. An antenna icon is 
turned on in the display when the tuner is active.. 

 

A long press enables the tuner and initiates the tuner to tune the antenna for the current band 
and frequency. The tuner is left enabled and the antenna icon is turned on in the display. 

 

Note: Beware if the split mode operation is set. Depending on VFO-A and VFO-B frequencies / 
bands; the tuner may get confused. 

‘POW’ Button 

Output Power Setting 

 

SWR Curve Scan

 

 

A short press allows the tuning control to select the desired G90 watts. Then press the tuning 
control to save the setting. 

Press the ‘POW’ button again and use the Tuning control to select the 

‘SWR THR’ SWR Threshold of 1.8 to 3.6. Press the Tuning control to end the sequence. 

 

A long press 

of the ‘POW’ button initiates the scan of the current antenna’s SWR vs. frequency 

plot. This scan is of the antenna without the tuner in the circuit. The scan is continuous until 
halted with the ‘VM’ button. During the scan the ‘PRE’ button may be pressed to specify 1 to 5 
KHZ as the scan bandwidth step size. 

‘KEY’ Button 

CW Configuration

 

 

Each short press allows setting the CW keying parameters from this list:  Keying speed, M/L/R 
selection, Mode A or B, QSK on or off, QSK Time or Dot: Dash Ratio, Use the tuning control to 
set the desired value and the press the tuning control to save the setting. 

 

A long press of the KEY button will change the bottom portion of the display where the G90 will 
attempt to decode and display the characters as CW is being received. Another long press will 
turn it off. Note that the CW decoder feature is very sensitive to precise tuning and the current 
filter settings. When close to being tuned properly the amber LED above the tuning control will 
blink in time with the CW note. 

‘LOCK’ Button 

Display’s Brightness 

 

 

Lock G90 buttons and 
controls.

 

 

Short presses will cycle the G90’s display intensity through five levels of brightness. 

 

A long press will lock the G90’s controls and display a lock icon indicating the lock status. 
Another long press will unlock the G90. All controls and buttons, other than the Lock button, are 
disabled. 

“PRE” Button 

Preamplifier and 
Attenuator

 

Press “PRE” repeatedly to cycle though these settings (see the icon in the display): 

 

“P” the preamp is on, providing a boost of the received signals 

 

 

‘A’ the input signal is attenuated by some amount 

 

No icon … neither the Preamp or attenuator is active. 

“CMP” Button 

Speech Compressor

 

 

 

The speech compressor functions to somewhat process normal speech frequencies into a 
narrower band to have the effect of boosting the effective output RF power.  

 

Applicable only in the LSB, USB, NFM or AM modes 

 

See a microphone like icon when the speech compressor is on 

“NB” Button 

Noise Blanker 

 

 

Pushing the button multiple times cycles through the following options: 

 

‘NB SW’ .. use the tuning control to select On or Off 

 

‘NB Level’ .. use tuning control to select 0 to 10. Lower numbers will tend to mute the receiver. 

 

‘NB Width’ .. use  tuning control to select 0 to 10. Higher values will tend to mute the receiver. 

 

Press the tuning control to end this process at any point. 

Summary of Contents for G90

Page 1: ...mally Longer press to power off A short press will turn off the G90 display but the radio continues to operate A short press or using any other G90 control will restore the display Vol Audio Output Le...

Page 2: ...Gain thereafter the MFC will be used to set the G90 s RF gain from 1 to 100 Note that a long press of the AGC button also allows access to the RF Gain setting Right Unmarked Rotary Control Tuning This...

Page 3: ...ton 4 LCD BL rotate the tuning control to specify the desired brightness of the display from 10 to 100 5 AUX IN Volume use the tuning control to specify the desired ACC port s Aux In volume from 0 to...

Page 4: ...long press of the KEY button will change the bottom portion of the display where the G90 will attempt to decode and display the characters as CW is being received Another long press will turn it off N...

Page 5: ...POW Input Source and Mic Gain Input use the volume control to select Line the ACC port or Mic Press POW Mic Gain use the Volume control to select the gain from 0 to 20 Press the volume control to end...

Page 6: ...it operation is in use VFO A is the receive frequency and VFO B is the transmit frequency FUNC Button and then press the Volume Control VOX Configuration After pressing this button sequence the VOX op...

Page 7: ...quires a baud rate of 19200 for the computer s serial port See the G90 manual for the ACC port Mini Din 8 pins Just three pins are used Aux AF IN Aux AF Out and Ground See this YouTube video for compr...

Page 8: ...x low level AC signal on the order of 50 or so millivolts or 100 millivolts peak to peak Depending on the sound card used to sample the IQ signal s sample rate the spectrum may be at least twice what...

Page 9: ...te desired o Select your sound card and the I Q as the input signal source for HDSDR or SDR o Select the desired bandwidth sample rate to be used o There are options to set up CAT operation with the G...

Page 10: ...1 KHZ Other broad noise pulses are unknown Note Below is an example of a computer spectrum display of the G90 IQ signal Very noisy Ferrites on the power supply and signal leads did not help this Howev...

Page 11: ...up just set it to 0 it neither damage the rig nor degrade the performance 6 Band stack mode Long press FUNC key and entering system menu at item 8 Band Stack Mode it can be set as HAM Band Full Band 7...

Page 12: ...V1 74 Release This update is based on the function of version 1 74 beta which mainly focuses on optimization with no functions added or deleted 1 Fixed the problem that MIC Gain is relatively high 2 A...

Page 13: ...ing Band Up Down Keys 2 New Multi Function Knob MFK Operation Logic Long Press MFK to Activate Selection Process 3 Add RF GAIN to MFK Function List So RF Gain May Be Always Easily Available 4 New Filt...

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