XIEGU G90S Amateur Radio Short Wave Transceiver User Manual

G90S Amateur Radio Short Wave Transceiver
User Manual

Introduction

The G90S is an amateur radio short-wave transceiver with a portable 20W in the SDR architecture. It is a new member of the Xiegu product family and the first portable SDR model in the G series.
Based on 24bit-C0DEC sampling, the G90S brings superior transceiver performance and a highly configurable feature experience; the separate head design allows you to flexibly position your host; with built-in high- performance ATU, you can meet your needs at any time. From then on, the antenna erection and adjustment are no longer problems.

• High-performance RF front end
• SSB/CW/AM/ three working modes
• 1.8-inch high color TFT LCD
• ±24k bandwidth spectrum display, waterfall display
• Software-defined narrow-band filter (CW mode can be as narrow as 50Hz), built-in CW decoder
• Separable head design Built-in standing-wave scanner
• Built-in efficient automatic antenna tuner

Please read this manual carefully for a better experience and full understanding of the operation of the G90S.

• G90S is a version in the People’s Republic of China, and G90 is a version in other countries or regions. This operation manual is applicable to both models. The contents of this manual are explained with the G90S model.

Specification & Parameters

General parameters

Frequency range: Receiving: 0.5MHz~30MHz
Transmitting: 1.8~2.0MHz
18.068~18.168MHz
3.5~3.9MHz
21.0~21.45MHz
7.0~7.2MHz
24.89~24.99MHz
10.1~10.15MHz 28.0~29.7MHz
14.0~14.35MHz
Operating mode: CW, AM, SSB
Minimum step: 10Hz
Antenna impedance: 50Ω
Scope of working temperature: 0°C ~ +50°C
Frequency stability: ±1.5ppm in the 10~60min after startup @25°C: 1ppm/hour
Power supply voltage: 10.5~16.5VDC, negative electrode grounding
Current consumption: Receiving: 700mA@ Max Transmitting: 6A@ Max
Frame size: 12045210mm (WHL) (excluding protrusions)
Weight: About 1.63kg (only host)

Transmitter parameters

RF output 20W(SSB/CW)
power: 5W (AM carrier wave) @13.8VDC
Spurious suppression: ≥50dB
Carrier suppression:≥40dB
Microphone impedance:200~10k (600Ω in general)
20W(SSB/CW) 5W (AM carrier wave) @13.8VDC 50dB

Receiver parameters

Circuit type: ZIF
Neighbor channel suppression: ≥60dB
Sideband suppression: ≥60dB
Sensitivity:

0.5~1.79999MHz| SSB/CW/| AM
10uV
---|---|---
1.8~1.99999MHz
2.0~27.9999MHz
28.0~30.0MHz| 0.35uV
0.25uV
0.25uV| 10uV
2uV
2uV

Mirroring suppression: 70dB
Midband suppression: 60dB
Audio output: 0.5W (8, 10% THD) Audio output impedance: 4~16

• Above specifications may be changed without notice.
• The working frequency range of the transceiver varies from the version of the equipment. Ask local dealer for details.

Accessories & Optional Components

Accessories of host:
Multi-function hand microphone: 1 in number

USB cable: : 1 in number
DB9 extension line:: 1 in number
Separating head fixing stud: 2 nos
Hexagon wrench: 1 in number
Power line: 1 in number
Warranty card: 1 in number
Instructions: 1 in number
Quality certificate: 1 in number

*Optional components:

CE19: host ACC adapter (can be used as data communication to transmit an audio signal or to connect XPA125B amplifier)
XPA125B: 100W power amplifier + automatic antenna tuner all-in-one machine

Interface Definition

Definition of microphone interface

Wiring diagram of earphone plug

Wiring diagram of COMM plug

Definition of ACC terminal

Wire connection of telegram keys

Note:

• If the connector of the telegraph key is a 6.5mm 2-core plug, please change it to a 3-core 3.5mm stereo plug according to the wiring method shown in the figure above, and connect the trigger end of the electric key to the “Di” or “Da” terminal.
• Take care that direct use of the 2-core to 3-core adapter or incorrect wiring may result in the radio in CW transmission status all the time.

Machine Interface

1 Volume knob

• Turn the knob to increase or decrease the volume.
• Short press the knob to switch to the headphone output mode.

2 Power supply/transceiver indicator light

• Standby/receiving state: yellow-green;
• It is red under the transmitting state.

3 Power switch

• In the power-off state, short press this key to turn it on.
• In the power-on state, long press this key to shut it down.
• Under startup state, short press the key to turn off the screen display and save electricity.

4 Multi-function Adjustment Knob

• By default, turning this knob will step at 100kHz.
• Long press this knob to switch to the Select Custom function.

5~6 MODE mode switching
Mode switching. It will switch cyclically among the several modes.
7~8 BAND band switching
Band switching. It will switch cyclically from the low-frequency stage to the high-frequency stage.
9 FUNC indicator
This indicator will be on when the second function of the key is operated.
10 ΔF indicator
This indicator flashes along with the signal when it is aligned to the receiving frequency in CW mode.
11 Main knob
Change the current frequency by controlling this knob; or change the menu setting during setting the menu items.

Panel Keys

12 Function keys
The key definitions and functions are detailed in the operation section (Page 12).

Machine Interface

13 Antenna interface
SL16-K type interface, impedance 50Ω.
14 KEY interface
It is a 3.5mm stereo interface used to connect manual/auto telegram keys. (See Page 5 for the wiring method)
15 COMM interface
It is used for updating the machine hardware.
16 I/Q signal output port
It is a 3.5mm interface (3 wires) used for IQ signal output.
17 ACC interface
The interface is an 8-core mini-type DIN interface. See the interface definition for details. (See Page 5 for the definition of port)
18 DC power interface
External DC power input interface. The round hole is the negative electrode and the square hole is the positive electrode.
19 Grounding terminal
Excellent grounding can improve the receiving performance and improve the anti-interference of the radio.

20 MIC (microphone) interface (located on the right side)
It is used to connect the attached multi-function handheld microphones.

21 Headphone interface (located on the left side)
It is a 3.5mm stereo socket (3 wires) interface used to connect earphones. (See Page 5 for the wiring method)
22 Communication interface (located on the left side)
It is used for hardware updating of the head unit and the online control with the computer.

Notes:

1. It is required to insert the USB cable into this port for completing the data communication.
2. Do not insert the cable into this port before startup, otherwise the starting will become abnormal.

Hand Microphone Keys

defined, detailed in system menu 1)
5. Figure key area| Figure keyboard area
6. FIL key| Filter selection
7. MODE key| Selection of working mode of the host
8. Functional indicator light| No
9. Function keys| F1/F2 key (user-defined, detailed in the system menu 2&3)
10. MW key| Memory operation
11. V/M key| Frequency/channel switching
12. XFC key| No function
13. TUNER key| Press it in a long time to start the antenna tuner for tuning

Power Source Connection

The 13.8V external DC power supply is available for G90S. The current load capacity of the DC power supply shall be 8A at least. The attached power lines can be used to connect to radio and DC power supply.
DC power supply shall be connected in strict accordance with the following figure to avoid reverse polarity connection.

• The Red line shall be connected with the positive pole of the power supply and the black line shall be connected with the negative pole of the power supply.

• EMC magnet ring can be applied on power lines to prevent external disturbance from entering radio via power lines and radio-frequency interference in radio from radiating externally via power lines when the external power supply is adopted for G90S. Magnet ring shall be installed at the side closing to the radio.

• The polarity of power lines shall be carefully inspected to avoid reverse polarity connection when the external power supply is adopted.

• A reverse connection of power may cause severe damage to the radio.

Functions of Panel Keys and Switching

Button| The first function (short press, cycle)| Second function (FUNC+)| Long press
---|---|---|---
PROJECT| PRE – ATT – direction connection| /| /
CMP/F-L| Turn it on to transmit voice compression| Digital filter F-L, low- pass cutoff frequency selection| Reset
parameters
NB/F-H| NB SW-NB Level-NB Width| Digital filter F-H, high-pass startup frequency selection| Reset
parameters
AGC/SPL| Open AGC, F-S+A close and circulating| on the p
Turn pilot frequency transceiver
operation mode| RF GAIN
VM.| Switch frequency mode or channel mode| /| Call Sign
Editor
MW/MC| Turn on channel memory function| Channel clearing|
A/B.A>B| Switch between VFO-A and VFO-B| Cop the Oy current VFO to the background
VF| /
TUNE| Turn on/off the antenna tuning function|  /| /
Antenna tuning
POW| POWER Transmitting Power Setting| MICGAIN Hand microphone MIC
gain setting| Standing-wave
scanning
Standing-wave protection
SWR THR
threshold setting| INPUT Voice input mode selection
KEY| SPEED Automatic key rate-setting| CW Volum Side tone volume setting| CW automatic
decoding
Manual/automatic left and right
M/UR
mode switching| CW TONE Side tone frequency setting
MODE iambic AB mode switching| /
QSK Insert/non-insert selection| /
QSK Time Insertion time setting| /
Setting of automatic key Ratio dot-and-dash interval
proportion| /
LOCK| /| SCALE Spectrum reference level
setting| Lock button
AVE FFT Mean value setting, ranged
1-10
Volume knob| Loudspeaker/earphone switching| VOX ON/OFF Voice control switch| /
VOX GAIN Voice control gain setting| /
Hand microphone and ANTI-VOX speaker echo suppression setting| /
Voice control transmission
VOX DLY
turnoff delay| /
Multi-knob| Filter center mode setting| /
/| /
Filter bandwidth mode setting| /| /
Main knob| Frequency step selection| Open RIT| /

The operation of the second function:

• Press the [FUNC] key first, then the F indicator will be on, then press the corresponding function key.
• Press the [FUNC] key again to exit the second function. At this time, the Vindicator is off.
• In any function (including FUNC second function) setting interface, short press the main knob to save, exit the function setting and return to the main interface.

Screen Display Icon

Function and definition of display icon:
: pre-amplifier is open. The icon character A refers that the pre-attenuator is open.
: NB pulse suppressor is open
: automatic antenna tuner is open
: CMP voice compressor is open
: muting function is open
: voice control function is open
: AGC control is at S gear. (AGC-F, AGC-AUTO, AGC gears are available)
: external power & voltage display
: current working mode is USB. (LSB, CW, CW-R, and AM modes are available)
: VFO-A is the current working frequency (in the figure, SPL is open, and VFO-B is transmitting frequency)
: SPL split frequency receiving & transmitting mode is open
: loudspeaker mode. Short press the volume key to switch to the earphone mode, and here displays the earphone icon
: key lock sign.
: under receiving status, S refers to the strength transmitting the status of current receiving signal, and Po refers to the current transmitting power value
: under transmitting status, it displays the standing-wave value of radio antenna port
: status indication of receiving filter

Operation

Dear user, in order to familiarize you with the functions and proficiency of the G90S portable transceiver as soon as possible, please read the operation guide of
this manual to understand the powerful functions of the G90S. Let’s start!
Transceiver start and shutdown

1. Start the transceiver: short press key .
2. Shut down the transceiver: press and hold the key for 1s under startup state.

Off-screen operation:

Under startup state, short press the switch key to turn off the screen display.

• When the screen is turned off, the host is still in normal working condition. Pressing any key or turning the knob will turn up the screen display.

Display of Power Voltage

After turning on the radio, the upper right corner of the screen will display the externally connected DC voltage value.

The external voltage is 13.8V in the figure

• Do not supply over-voltage power to the radio, or the radio will be seriously damaged!
• Due to the line loss and discrete difference of electronic elements, the displayed voltage value may have a deviation of around ±0.3V compared with the output voltage of the power terminal.

Selection of Working frequency range：

The frequency range of G90S covers 0.5~30MHz. Amateur frequency in such a range is divided into 10 frequency bands, and a frequency band switch can be achieved by adopting many types of different modes.

Operation methods:

Continuously pressure [<] or [>] keys of BAND to switch the operating frequency bands cyclically:

• Each amateur band has a user-defined frequency band that is convenient for temporary use. When the band is switched, the custom bandpasses. This function can be opened or closed (as detailed in Item 8 of the system menu).
• 60m frequency band shall be opened according to regulations of the country (or region).
• Frequency division for equipment in different versions is different, which shall be in accordance with the regulations of the country (or region).
• VFO-A and VFO-B are two independent VFO modes that can be set to different operating states. See [VFO Settings] for details.

Operating Mode Selection

Press the [MODE] key and switch the fixed sequence below among all modes: LSB- USB — CW — CWR –- AM

Volume adjustment

Speaker mode:
Turn the volume knob to the left or right to adjust the output volume.
Headphone mode:

1.  Short press the volume knob to enter the headphone mode.
2. Turn the volume knob to the left or right to adjust the headphone volume.

• Please turn the volume to the minimum before using earphones for the purpose of protecting your ears. Gradually adjust the volume to be appropriate as required after the earphone is inserted.

Call Sign Editor

This machine can set the call sign information displayed on the startup interface.

1. Long press the [VM] key to enter the text editor.

2. The bottom of the screen is the character selection area. Rotate the main knob to select the desired character. Press the main knob in a short time to select
   the character;

3. Press the key corresponding to BACK to delete the last character; press the key corresponding to QUIT to exit the editor interface; press the key corresponding to SAVE and exit the editor interface.

4. When the machine is started, the edited text message will be displayed on the screen. 4. When the machine is started, the edited text message will be displayed on the screen.

The corresponding relationship between functions and keys:
SAVE: Corresponding to the [PRE] key
BACK: Corresponding to the [NB] key
QUIT: Corresponding to the [VM] adjustment of transmitting power

Working Frequency Setting

There are two methods for setting the working frequency of G90S, i.e., set by using the large knob or multi-function hand microphone.

1. Set frequency by using the main knob
   • Press the main knob in a short time to select the 100Hz, 1kHz, 10kHz, and 100KHz stepping positions;
   • Rotate the main knob and set the frequency of the current step.

2. Set frequency by using a multi-function hand microphone
   • Press [F-INP ENT] key on the hand microphone and the G90S will be in frequency setting state, and the cursor will be flickering at the first place on the left of frequency display position;
   • Input expected frequency values one by one, and press [F-INP ENT] key again to complete the frequency setting. Main knob

For example, press keys in the following sequence to set the current frequency as 14.09000MHz:

1. Press [F-INP ENT] key firstly;
2. Press number keys one by one;
3. Press the [F-INP ENT] key again to complete the setting.

Quickly adjustment of the frequency

The [Multi-function Adjustment Knob] of G90S provides a method of quickly adjusting the frequency. The knob function can default that the VFO frequency is adjusted at 100kHz position.

Adjustment of RF Gain and Muting Level RF GIAN / SQL

Proper RF gain can facilitate improving the quality of signal received. In general, Appropriately reducing the RF gain value at some low-frequency ranges with strong interference can significantly improve the hearing.
Adjustment methods of RF gain:

1. Long press the [AGC] key at the bottom of the screen to call the setting option RFGAIN.
2. Rotate the main knob to adjust the RF gain value.
3. After setting, press the main knob in a short time to exit the current setting option.

SQL setting

When muting is necessary for signals or noise less than a certain amplitude, an appropriate muting level can be set to disable the audio switch without signal so that the speaker can be muted.

Operation methods:

1. Long press [Multi-function Adjustment Knob] to enter the user-defined function menu, rotate the main knob to select the SQL Level function, press the SAVE key at the bottom of the screen in a short time to select the function, save and exit.
2. Rotate the [Multi-function Adjustment Knob] to set the muting level. At the same time, the muting grade will display on the screen.
   • The muting grade gradually strengthens from S1 ~S9, corresponding to strength. For example, when the muting grade is set to be S3. it indicates that the speaker will sound when the signal strength is more than S3. Otherwise, the speaker will in silent mode.

Multi-function Adjustment Knob

The multi-function knob have several operating options whose functions can be customized.
Default: 100kHz frequency stepping position.

Press in a short time: Enter the receiving filter mode to select.

Long press: Enter the user-defined function menu, rotate the main knob to select the corresponding function, and press the SAVE key at the bottom of the screen in a short time to select the function. At this point, the function is set to the [Multi-function adjustment knob].

Functions that can be customizedare as follows:

1. Freq 100k	100kHz stepping

2. SQL Level| Muting setting
3. Po Level| Transmitting power setting
4. Key Speed| Automatic key rate-setting
5. FFT Scale| Spectrum reference level setting

Pilot Frequency Receiving and Sending Operation SPL and VFOA/B Settings

G90S transceiver has two built-in independent VFOs which respectively set different tent frequencies and modes. Cooperated with the SPL function, it can conveniently achieve pilot frequency receiving and sending operations.

VFO setting:

1. Press [A/B / A>B] key in a short time to switch between VFO-A and VFO-B;
2. Set current VFO working frequency and mode while switching to a certain VFO state.

Pilot frequency receiving and sending SPL operation methods:

1. Set received frequency and mode (VFO-A) firstly;
2. Set transmitting frequency and mode (VFO-B);
3. Operate the second function of the [AGC/SPL], turn on the SPL function to enable the pilot frequency transceiver mode and the double-triangular icon will also display on the VFO area of the screen.

• VFOA/B can be fully used to set different frequencies and modes, so as to quickly switch the two frequency points in real-time.

Automatic Gain Control (AGC)

Select appropriate AGC control parameters in different work modes to achieve a good receiving effect.

1. Press [AGC] key at the bottom of the screen in a short time, enable/ disable or select different AGC modes and circulate them in the following order:
   AGC-S → AGC-F → AGC-A → AGC– AGC-S: Slow AGC control
   AGC-F: Fast AGC control
   AGC-A: Automatic AGC control
   AGC–: AGC disable
   

2. When the AGC-A mode is selected, the radio will automatically select the appropriate AGC control parameter according to the current work mode.
   • After AGC is disabled, the receiver will be in the maximum gain state and noise received will be significantly increased.

PREAMP/ATT

The pre-amplifier can improve the receiving effect of some weak signals of high-frequency range and the sensitivity of the receiver.

1. Press [PREV] key at the bottom of the screen in a short time and the character P will appear on the top left corner of the screen, indicating that the pre-amplifier is turned on.
2. Press [PREV] key again in a short time and the character A will appear on the top left corner of the screen, indicating that the pre-attenuator is turned on.
3. Press [PREV] key again in a short time and no character will appear on the top left corner of the screen, indicating that the current state is the shoot-through state.
   • Before they are used in a frequency range less than 14MHz, disabling the pre-amplifier is recommended so that the radio can be in the shoot-through state, which is conducive to strengthening the front-end performance of the receiver and reducing the influence of interference signals.
   • When the S meter displays that the received signals exceed S9+20dB, turning on the pre-attenuator is recommended to avoid the decreasing of the state of the receiver due to strong signals.

Pulse Interface Suppressor NB

Pulse interference suppressors can effectively eliminate some kinds of pulse noise, especially the interference caused by the automobile ignition systems.

1. Press [NB] key at the bottom of the screen in a short time to enter the NB function setting, and the corresponding menu will display on the screen.
2. Continue to press [NB] key in a short time to select different NB function setting menus, and rotate the main knob for setting.

The NB function menu includes the following options:

• NBSW: NB function switch. Default OFF
• NB Level: setting of NB suppression level.
• NB Width: setting of NB suppression width
• NB suppression width and level can be properly adjusted to effectively suppress different kinds of pulse interference.
• improper NB parameter setting will severely affect the receiving effect. Disabling the NB function at ordinary times is recommended.

Voice Compression CMP

The voice compression can increase the average power output during voice communication so that signals can be resonant.

1. Press [CMP] key at the bottom of the screen in a short time and the mark of voice compression will appear on the screen, indicating that the function is enabled.
2. Press [CMP] key at the bottom of the screen again in a short time to disable the voice compression.

CW Communication

Use telegraph keys or an external keying unit to insert into the KEY port at the tail of the radio. (See Page 5 for the definition of wiring)

1. Insert keys into the KEY port;
2. Press [MODE] key to switch to CW (or CWR) mode;
3. Enable the QSK function in the [KEY] key function and set the appropriate QSK time;
4. Press telegram key to enable CW communication.

Practice mode

You can take G90S as a CW code trainer in the following methods:

• Disable the QSK function in the [KEY] key function. There will be only CW sidetone of the transceiver after pressing telegram keys under such conditions, but signals will not be transmitted externally.

CW automatic decoding

Long press [KEY] key to enable the CW automatic decoding. Rotate the main knob to do the fine tuning of the received frequency till the indicator light A flashes with the code. At this time, the information about the telegraph text after decoding will appear at the bottom of the screen.

• Since the accuracy of CW automatic decoding is related to the reporting accuracy, signal propagation quality, and frequency accuracy of the other radio, the CW automatic decoding can be used as auxiliary decoding means cooperating with the human decoding. When the automatic decoding is used, the bandwidth of the receiving filter is recommended to be 300Hz.

The [KEY] key function includes common function setting items during CW

communication. Press the key in a short time to select:

• SPEED: automatic key rate-setting
• M/L/R: settings of manual/ automatic left and right-hand modes
• MODE: Iambic A/B mode setting
• QSK switch: switch setting
• QSK Time: QSK time setting
• Ratio: setting of automatic key dot-and-dash interval proportion

Enter the second function of the [KEY] key to set CW sidetone volume and tone, and press [KEY] key in a short time to switch the options:

• CW Volume: sidetone volume setting
• T800Hz: sidetone tone setting
• B500: CW receiving band setting (the default value is 500Hz)

SSB Communication

Insert the hand microphone into the MIC port on the right side of the radio head unit. After inserting, the green indicator light on the hand microphone shall be on.

1. Press [MODE] key () at the top of the head, and switch to LSB or USB mode.
2. Enter the second function of the [POW] key for the following settings:

1. MIC GAIN: setting of hand microphone voice gain (recommended default value)
2. INPUT: setting of input mode (the default is MIC and select MIC during voice communication)
3. B2400: SSB mode defaults to be bandwidth setting, indicating that the bandwidth is 2.4kHz.

3. Enter the first function of [POW] key and press the key in a short time to set the transmitting power value:

1. POWER: transmitting power setting (the default is 1W)
2. SWRTHR: setting of standing-wave protection threshold (the default is 3.0)

4. After the above settings are completed, the single-band voice communication is started.

• The defaulted hand microphone voice gain value can meet the demand of voice communication in most cases. In the case of superfluous spectral lines with relatively low magnitude on both sides of voice spectral lines displayed on the screen, the hand microphone voice gain value can be appropriately adjusted till superfluous spectral lines disappear.

Voice-control Transmission VOX
The voice-control transmission VOX can automatically judge whether there is hand microphone voice signal or line input signal, so as to automatically control the radio to switch between the receiving and transmission. After the VOX function is activated, it is unnecessary to press the hand microphone PTT key to start the transmission.

After pressing the [FUNC] key to activate the second function, press the volume knob in a short time to enter the VOX function setting option and circularly press
the volume knob in a short time to switch menus.

• VOX OFF/ ON: VOX function off/ on
• VOX GAIN: voice control gain setting (the recommended setting: 50)
• ANTI-VOX: echo suppression settings of hand microphone and speaker (the recommended setting: 50)
• VOX DLY: voice control triggering turnoff delay setting (the default: 0)
• The voice control function can be utilized for both the hand microphone and the line input LINE.
• When the AFIN port of the ACC interface is used for line input voice control, set the appropriate input volume in the “AUX IN Volum” option in the system menu.

Automatic Antenna Tuner

There is an efficient ATU integrated inside the G90S radio to help you quickly erect and debug the antenna.

1. Press the [TUNE] key in a short time to connect with a built-in antenna tuner. There will be an antenna icon at the top of the 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 the [TUNE] key in a short time, and there will be an antenna icon at the top of the 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 the “SWR” icon is displayed at the top of the screen and flashes once transmitting is enabled after the tuning, it indicates that the standing wave of the current antenna is still large and tuning is required to be carried out again.
4. Antenna tuning shall be turned off once the natural resonance of the antenna reaches the 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.

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.

The 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 professional antenna analysis equipment for measurement.

Fine Tuning of Received Frequency (RIT) Operation methods:

1. Long press the main knob to enter the adjustment interface.
2. Rotate the main knob left or right to adjust the RIT value. The adjustment range is ±500Hz and relevant information is displayed on the screen.
   • After the RIT function is used, reset the RIT value to be 0 to avoid affecting the normal use.

Line Input and Output

The G90S has an external line input interface. When the G90S is used for data communication cooperating with a computer or an external modem, the correct corresponding signal input option shall be selected.

1. Input the external audio signal into the corresponding pin of the ACC port (see the interface description for the definition of the pin).
2. Enter the second option INPUT of [FUNC+POW] to select: LINE.
3. In the system menu, select: AUX IN VOLUM to set the appropriate input volume.

Operating method of line output:

In the system menu, select: AUX OUT VOLUM to set the appropriate output volume.

• When the digital communication is conducted and the ACC port is used for audio input, it shall be ensured that the volume of the line input is the effective level value ≥200mV.
• Level output from the computer or other modulation equipment to the radio shall be adjusted so that the ALC value displayed on the screen can range from 30 to 85. i.e. proper signal levels. Excessive high input signal level may overload the input amplifier, resulting in the modulation signal distortion.

In the system menu, the following two settings are related to the receiving or transmitting volume setting during the data communication:

• During the data communication, the volume of signal input from the computer or other external equipment to the radio is needed to be adjusted for the “Line input volume”. The volume of the signal output from the computer or other external equipment to the radio is needed to be adjusted for the “Line output volume”.

Channel Memory MW and Clear MC

Basic operations:

1. In VFO mode, adjust the required frequency, mode, advanced function status and other parameters.
2. Press [MW/MC] key in a short time and the CH 00 (channel number) character will appear on the screen and flash. Rotate the main knob to select an empty channel. At this time, the character E will appear after the channel number, indicating that the channel is empty and can be used for memory.
3. Press [MC/MC] key again in a short time to save the current set frequency information to the selected channel.

Call the memory channel:

1. In VFO mode, press the [VM] key on the panel in a short time to enter channel mode;
2. Rotate the main knob to switch the current channel.

Clear the channel memory:

1. In channel mode, press the combination key [FUNC] + [MW/MC], at this time, the channel number starts to flash;
2. Rotate the main knob to the channel to be cleared. Press [MW/MC] key again to clear the selected channel.

Transmitting Power Setting

1. Press [POW] key in a short time to enter the power setting state, and the function display area on the right side of the screen will display the Po power setting value.
2. Rotate the [Multi-Function Adjustment Knob] to set the power, with the stepping of 1W.

Please minimize the preset transmitting power when the G90S radio is used for the first time under the condition of not understanding the current state of the antenna.

Digital Filter

The G90S has a built-in variable digital filter that can continuously adjust the bandwidth of the filter and improve the anti-interference performance and selectivity of the radio.
The G90S has two filter adjustment modes: center frequency point mode and bandwidth mode.

1. Press [Multi-function adjustment knob] in a short time to respectively switch these two filter modes.
2. When the center frequency point mode is selected: The prompt text “Cxxx” appears on the filter icon (“xxx” refers to the center frequency point value) and the green vertical line displays on the orange trapezoidal center.
3. When the bandwidth mode is selected: The prompt text “Cxxx” appears on the filter icon (“xxx” refers to the bandwidth value) and the green vertical line displays on both sides of the orange trapezoid.
4. When the center frequency point mode or the bandwidth mode is selected, rotate the [Multi-function adjustment knob] to adjust corresponding parameters.

Adjustment of the starting and cutoff frequencies of the filter:

1. Press the [FUNC] key in a short time to enable the operation of the second function.
2. Respectively press the [CMP/F-L] key and [NB/F-H] key and rotate the main knob to adjust the upper and lower boundaries to form a filter with different bandwidths. Press the [CMP/F-L] key and [NB/F-H] key again in a short time to display the current set bandwidth value B in the function display area of the screen.

• F-L: Adjust the low-end cutoff frequency of the filter
• F-H: Adjust the high-end cutoff frequency of the filter

The method to reset the default filter parameters:

1. Press [FUNC] key in a short time to enable the operation of the second function.
2. Long press the [CMP/F-L] key or [NB/F-H] key to reset the starting and cutoff frequencies of the filter to be initial values.

• Properly adjusting the filter parameters can greatly improve the performance of the receiver as well as its sensitivity and signal-to-noise ratio.
• In CW mode, the digital filter can be minimized to 50Hz, but there will be an obvious kettle effect.
  Attention shall be paid to the selection of appropriate bandwidth to gain the best hearing.

Spectrum/ Waterfall Display

The G90S radio can display the spectrum diagram and waterfall diagram of receiving signals and can quickly observe whether there is a communication signal on the neighboring frequency so that uses can quickly track and switch frequencies and search the radio.
Spectrum display bandwidth: 48kHz
The spectrum signal strength value displays the accuracy: ±2dB
When the spectrum display is elevated, the spectrum top can not display or area of the waterfall diagram display is white due to strong signals, the SCALE parameter and the display effect can be adjusted:

1. Press [FUNC] key in a short time to enter the SCALE reference level setting.
2. Rotate the main knob to adjust the SCALE value till the display effect is appropriate.
3. Press the main knob in a short time, save and exit the setting interface.

• The SCALE reference values shall be set gradually increasing from 1 to 10. When the strong signals are observed, the SCALE values shall be turned up.
  When weak signals are observed, the SCALE values shall be turned down.

• SCALE value in each frequency range can be independently set.
  The second function meter of the [LOCK] key is as follows:

• SCALE: reference level setting

• AVE: average value setting

AVE average values shall be set gradually increasing from 1 to 10. The display effect of the spectrum will be increasingly smooth with the setting increasing of the average value. The average value can be set according to personal habits.

Data Communication

The G90S supports all amateur data communication modes and the full-function control of the computer software to the radio. Only simple wiring is needed forthe amateur data communication.
Appropriate digital work mode shall be selected before operation. The recommended common work modes are as follows:

• The radio setting mode required for other data modes can be set in accordance with the using habit of amateur radio communication.

When amateur radios and the computer cooperate with on data communication, the computer is used as a “modem”. While receiving, the signal received by the
radio is transmitted to the computer for demodulation; while transmitting, the signal modulated by the computer is transmitted to the radio for transmission.
The signal transmission direction and relationship are as follows:
While receiving: the radio receives the signal → computer
While transmitting: the computer generates the signal → radio

Preparation:

• The radio USB data cable (USB-3.5mm plug), and the driver of the data cable which has been correctly installed on the computer (the port number is visible in the equipment manager. The yellow exclamation point indicates the equipment installation is abnormal).
• A set of CE-19 expansion cards (optional)
• Several EMC magnetic rings (self-provided)

Connection steps:

1. Insert the 3.5mm plug of the universal data cable into the communication port on the left side of the G90 head, and insert the USB into the computer.

2. Insert the delivered 8-core ACC cable into the ACC port at the end of the G90 and the other end into the corresponding port on the CE-19 (note that there is only one 8-core port).

3. Insert one end of the delivered audio cable into the AFCON interface of the CE-19, and, according to the wiring diagram on the CE-19 panel and
   connecting method of the audio input/output port of your own computer, connect the other end with a 3.5mm stereo plug, and insert it to the audio port on the computer.

4. Set G90S to be “Line input” mode. (See Page 24 for specific methods)

5. Set the G90S to be the corresponding work mode for data communication.

At this point, the wiring is complete. Refer to relevant software instructions for the operation method of the PC software.

• The external input signal strength shall be within the ALC control range to avoid the input overloading.
• The EMC magnetic ring on the USB data cable and the audio cable close to the computer end card can eliminate the interference of the RF signal to the USB port of the computer, stabilizing the connection.

The connection between the G90S and XPA125B (optional)
After the G90S connects with the XPA125 power amplifier and antenna tuner AIOthrough the CE19 adapter, the output power can be expanded to 100W.

Schematic Diagram of Wiring between G90S and XPA125B

After connection, the G90S can automatically control the waveband switching of XPA125B. Moreover, the ALC control will be built between two machines. When the G90S output power exceeds the power limit of the XPA125B, the AACL control will automatically decrease the output power of the radio so that the output power of the XPA125B will be kept to be about 100W.
We suggest that the output power of the G90S is set to be ≤2.5W to protect the amplifier equipment.

• The 8-core ACC wire is delivered in the CE19 kit, and the 6-core ACC wire is delivered in the XPA125B packing case.

Description of System Menu
System Menu
The system menu enables a customized setup for partial functions. You may use this feature to configure the settings suitable for you.
Operation method: Hold the [FUNC] key to enter the system menu.
The definitions of menu functions are as follows:

Description of the multi-function key displayed at the bottom of the screen:
PREV: previous page.
SAVE: after adjusting the system menu settings, press this key to save and exit.
EXIT: exit the system menu interface directly.
NEXT: next page.

Description of System Menu

Menu item 1: Handle up/down
Function: Customize the function of [▲▼] key on a multi-purpose hand microphone.

Optional value:

Default: FREQCH+/-

Menu item 2: Handle F1
Function: Customize the function of the [F1] key on a multi-purpose hand microphone.
Optional value: PRE/ATT
SALT
NB
COMP
AGE
Default: PRE/ATT
Menu item 3: Handle F2
Function: Customize the function of [F2] key on a multi-purpose hand microphone.
Optional value: PRE/ATT
SALT
NB
COMP
AGE
Default: SPLT
Menu item 4: LCD BL
Function: Set the brightness of the displayer backlight
Adjustable range: 10°%~100% The larger the percentage, the higher the brightness
Default: 80%
Menu item 5: AUX IN Volum
Function: Set the volume of ACC port input audio signal
The large the value, the greater the volume
Adjustable range: 0~15
Default: 8
34
Menu item 6: AUX OUT Volum
Function: Set the volume of ACC port output audio signal
Adjustable range: 0~15
Default: 15
The large the value, the greater the volume
Menu item 7: RCLK Tune
Function: Regulate the reference clock of the radio’s internal frequency combiner. Able to correct the frequency deviation of the radio.
Adjustable range: -1000Hz~+1000Hz
Default: 0Hz
Eg.: when you think that signal tone you hear is 20Hz below the correct frequency, set this item at 20Hz;
when you think that signal tone you hear is 20Hz above the correct frequency, set this item at -20Hz;
Menu item 8: Band Stack Mode
Function: Set band stack. During the switch of the frequency band, enable/cancel the display of non-amateur frequency bands in the band stack.
Optional: HAM Band
FULL Band
Only display amateur frequency bands
Display all frequency bands
Default: HAM Band
Menu item 9: ON/OFF Beep
Function: Enable/disable and the system prompt tone. Enable/disable the prompt tone at startup & shutdown.
Optional: Enable/Disable
Default: Enabled

Menu item 10: Version

Function: Display the firmware version No. of head and body.

Factory Reset

When the parameters of the radio are disarranged or in case of any other situation that causes improper parameters, this function enables the restoration of factory settings.
Operation methods:

1. Hold the FNUC key to start up and enter the restoration of factory settings.
2. Press the PRE key to confirm the implementation. Press the VM key to cancel the operation and exit.

• Default parameters can meet most operating needs, ensuring the radio is working under good conditions.

CIV control instructions

G90S adopts standard CIV instruction sets. You can remotely control the transceiver based on standard instructions of the instruction set or configure control instructions of other software, so as to achieve the control on G90S.
See specific specifications of CI-V instructions in CI-V COMMUNICATIONS INTERFACE-V REFERENCE MANUAL.

Wave Band Voltage Data

The ACC socket of the BAND terminal of G90S outputs the band voltage of each frequency band. This band voltage is associated with the current frequency band of the radio and can control peripherals to achieve automatic waveband switch or can be used by other equipment to identify wave brand information.

Waveband| Voltage| Wave
band| Voltage| Wave
band| Voltage| Wave
band| Voltage
---|---|---|---|---|---|---|---
1.8MHz
3.5MHz| 230mV
460mV| 7MHz
10MHz| 920mV
1150mV| 18MHz
21MHz| 1610mV
1840mV| 28MHz
/| 2300mV
/
5.0MHz| 690mV| 14MHz| 1380mV| 24MHz| 2070mV| /| /

Copyright Statement

All Rights Reserved, 2019
Chongqing Xiegu Technology Co., Ltd. reserves all rights to the manual. All parts of the manual shall not be copied without permission.

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

The device has been evaluated to meet general RF exposure requirements. The device can be used in portable exposure conditions without restriction

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