Full Mode
SDR Transceiver
User Manual
V1.0 May. 2021
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About Radioddity
“You, our friend and customer, are at the forefront of what we do.”
Thank you for purchasing Radioddity products. On behalf of our caring and responsive Customer
Support team, we strive to fulfill that promise and better meet your needs every day.
In order to protect your rights and interests, please read the terms of Warranty Policy.
Warning
Please read this manual fully before operation so as to get a good understanding of the QR20’s
1.
capabilities and functions.
When using an external power supply, carefully check the polarity of the power cord and do not
2.
reverse the polarity.
The limited warranty of this radio does not include damage caused by an external power
3.
connection error or damage caused by improper power supply voltage.
Qualified technicians shall service this equipment only.
4.
Do not tamper the transceiver for any reason.
5.
Do not use any transceivers with a damaged antenna. If a damaged antenna comes into contact
6.
with your skin, a minor burn can result.
Turn off your transceiver prior when entering any area with explosive and flammable materials.
7.
Do not charge your transceiver in the area with explosive and flammable materials.
8.
To avoid electromagnetic interference and/or compatibility conflicts, please turn off your
9.
transceiver in any area where posted notices instruct you to do so.
10.
Turn off your transceiver before boarding an aircraft; any use of a radio must be in accordance
with airline regulations or crew instructions.
11.
Turn off your transceiver before entering a blasting area.
12.
Do not place a transceiver over an airbag area or in the airbag deployment area for vehicles with
an airbag.
13.
Do not expose the transceiver under direct sunlight over a long time, nor place it close to a
heating source.
14.
When transmitting with a transceiver, hold it with the microphone 3 to 4 centimeters away from
your lips; also make sure the antenna stays at least 2.5 centimeters away from your body when
transmitting.
Copyright
Radioddity reserves all rights to this manual, and reproduction of any part of this manual is prohibited
without permission.
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Summary
The Radioddity QR20 is an ultra-portable full-frequency full-mode SDR radio with a reception from
100kHz to 2GHz and transmit from 160m to 70cm. The operation modes include SSB, CW, AM, FM,
RTTY and digital modes. It includes multiple advanced functions and features as an SRD radio
station. The QR20 is designed with both USB and DC interface power supply modes.
The display adopts high-brightness and high-resolution liquid crystal display with adjusted backlight
brightness, which can be clearly displayed outdoors. The panel is designed with full keyboard, which
is convenient for various operations. The keyboard is with backlight to help operate this radio in a
dark environment. The QR20 has a built-in Bluetooth module, a USB cable integrated sound card
and a serial port. You can easily control the radio with a single USB cable.
The QR20 has a lot of advanced features that are only available in large base stations. This gear has
dual VFO mode, different frequency operation function, intermediate frequency offset adjustment,
receiving frequency fine-tuning, intermediate frequency noise suppression, AGC speed selection, RF
gain adjustment, squelch control, front attenuator, AM aviation communication reception, AM/FM
Broadcast reception, built-in telegraph automatic key, automatic key-point ratio adjustment, built-in
CTCSS analog tone, automatic shutdown function (APO), transmission timeout function (TOT);
connection with computer and computer-aided control function, copy function, etc.
In addition, the QR20 has several modules to customize more functions.
Features:
1. Real-time spectrum
2. Waterfall chart
3. Supports FT8 mode
4. Using software-defined radio technology
(SDR), with multi-band and multi-mode
(SSB, CW, RTTY, AM, FM, and optional
DMR) support
5. Double conversion circuit structure
6. IF width and IF shift hardware and
software can be modified to provide
powerful IF interference suppression
7. DSP digital noise reduction
8. Built-in 160-6 meters high-speed
automatic antenna tuner
9. Built-in electronic key controller, all
parameters can be set flexibly
10. Built-in sound card with IQ and audio output
11. USB TYPEC3.1 interface for power supply
and computer connection
12. High precision TXCO ± 0.5ppm (-10-60 ℃)
13. Ultra-wide working voltage range: 5-32VDC
14. Power supply reverse polarity protection
15. GPS / BeiDou, GSM, electronic compass
(acceleration, angle sensor) (optional)
16. GPS time service (requires optional
GPS module)
17. Built-in UTC clock
18. Voltage display
19. VOX
20. Support RTTY, DTU, CW via keyboard
21. Ultra-light weight: ≤4.4lb (2kg)
22. IF IQ signal output available (which enables
DRM decoding via PC)
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Table of Contents
Accessories and Options
Specifications
Panel and Interface
Front panel
Key function
Indicator Light
Main Interface
Rear panel interface
Interface definition
Radio Setting and Operation
Turn on/off QR20
Frequency band selection
Frequency selection
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Mode selection
Transmit power selection
Receive volume, MIC gain
Hand microphone selection
Channel saving
Band selection operation
Different frequency operation
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AF audio setting
RF setting
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USB sound card data output format setting
Transceiver frequency offset setting
Transceiver mode setting
Tune operation
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A/B frequency operation
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NR/NB noise suppression setting
Spectrum and waterfall display setting
Spectrum parameter display setting
Digital filter operation
Application Menu Operation
CAT Control
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Receiving Operation
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Transmitting Operation (Locked by Default)
SSB communication
CW communication
FM communication
Repeater operation
AM communication
Data communication RTTY
QR20 Firmware Upgrade
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Accessories and options
01
Built-in Module
WFM
Bluetooth module
Cable Hand Mic
Built-in sound card
Automatic antenna tuner
Transmitter Architecture
Transmission Mode
Frequency Resolution
Transmit Frequency
Range*1
Output Power
Power Current
Carrier Suppression
Spurious Suppression
Channels
Receiver Architecture
Reception Mode
Reception
Frequency Range
IF Bandwidth
Sensitivity *3
Optional Module
GPS + GSM
Electronic compass (Altitude meter)
DMR
External VFO Knob
Specifications
Transmitter Parameters
SDR
DMR (optional), SSB, CW, RTTY, AM, FM
1Hz
1.800—2.000, 3.500—3.900, 5.351.5—5.366.5, 7.000— 7.200,
10.100—10.150, 14.000—14.350, 18.068— 18.168, 21—21.450,
24.890—24.990, 28—29.7, 50—54, 134— 170, 400—450MHZ
HF + 6m: SSB: (1-20W)
CW: (0.1-20W)
FM: (0.1-20W)
AM: (1-5W)
VHF: SSB / CW / FM (0.5-10W)
UHF: SSB / CW / FM (0.5-5W)
TX: 13.8V-6A (20W)
RX: 13.8V-0.25A typical value, 0.5A (highest brightness, audio peak)
<50db
1.8-54MHZ: ≥50db
144-146MHZ: ≥60db
430-440MHZ: ≥60db
99 channels
Receiver Parameters
SDR
DMR (optional), SSB,CW, RTTY, AM, FM
100kHz—2GHz * 2
20kHz
SSB / CW: (BW: 2.4kHz @ 10dB S / N)
0.18uV (1.8-54MHZ)
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0.25uV (144-146MHZ)
0.25uV (430-440MHZ)
AM: (BW: 6kHz @ 10dB S / N)
15uV (0.3-1.8MHZ)
2uV (1.8-54MHZ)
2uV (144-146MHZ)
Sensitivity *3
Intermediate Frequency
Suppression
Image Suppression
Audio Output Power
Tuning frequency
Range
Tuning Impedance
Range
Tuning Accuracy
Tuning Time
Tuning Mode
Spectral Bandwidth 48K radio frequency spectrum FFT
Size
Weight
Voltage Range
Antenna Interface
2uV (430-440MHZ)
FM: (BW: 15kHz @ 12dB S / N)
0.5uV (28.0-29.7MHZ)
0.25uV (50-54MHZ)
0.3uV (144-500MHZ)
0.5uV (430-440MHZ)
≥70db
≥80db
2W (10% distortion rate, 4Ω Load, 3KHZ)
Antenna Tuner Parameters
1.8—54MHz
16.7Ω–150Ω Unbalanced (standing wave ratio is better than 1: 3)
VSWR: 1: 1.5 or less
2-5S (whole section 10 seconds)
Automatic
Spectral Parameters
Conventional Parameters
170X120X45mm (excluding projections)
<2KG
RX:5-32V
TX: 5- 12V transmit power limit
12-18V full power output
18-32V transmit power limit
M
02
Note *1: Frequency range can vary according to different countries or regions, the actual frequency
by local legal provisions.
Note *2: Data retention.
Note *3: To be calibrated. The final interpretation reserved to manufacturers.
Front panel
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Panel control and operation
03
① Numeric keyboard
② LCD Monitor
③ Function keyboard
④ Headphone interface
Key function
Key
Power
BAND
SPLIT
R/X
MODE
TUNE
A/B
Switch the standing wave table (VSWR),
ALC, MIC audio indication
Frequency band selection
Different frequency on, different
frequency off
Volume, MIC gain, MIC audio
AF
compression, ground bass, treble
Radio frequency gain, Intermediate
RF
frequency gain, AGC、SQL、AT T
RIT receiving frequency offset, IT
transmitting frequency offset
Mode setting
Antenna tuner on and off
A/B Band
NR
NB or NR options
Short Key Function
⑤ Wired hand microphone interface
⑥ Receiving indicator
⑦ Transmitting indicator
Long Key Function
Power on, power off
CW setting
Tone setting
Channel/VFO mode selection
USB data output format selection
Transceiver frequency offset switch
USB/LSB, NFM/WFM/CWR switching
Tuning start/stop
A=B Band
Spectrum only, waterfall only, display
both spectrum and waterfall
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04
Key
DSP
PA
BW
Direction
Key Left
Direction
Key Right
Direction
Key Up
Direction
Key Down
MENU
NR, NB, PEAK threshold setting
Transmitting power setting
Digital filter selection
Left selection or decrement operation
Right selection or increment value
Up operation
Down operation
Confirm
Indicator light
Status
On
Off
Flashing
Short Key Function
Red
Transmitting
Long Key Function
Turn off NR or NB
High-low power switching
Spectrum bandwidth setting, spectrum
reference level setting, spectrum refresh
rate setting
*
*
Fast frequency adding
Fast frequency reduction
Application interface; Back
Green
Receiving
Error
Main interface
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05
7 8 9 10
6
5
4
3
2
1. Digital filter
2. Waterfall illustration
3. Spectrum
4. Band A/B instructions
5. Mode display
6. SWR, AUD, ALC meter
7. S-meter (transmitting power meter
when transmitting)
8. Transmitting frequency
9. Receiving frequency
10. Voltage display
11
12
13
14
15
16
17
18
19
20
21
22
1
11. Tune enable display
12. Power display
13. Digital compass
14. LoRa display
15. GPS display
16. Bluetooth display
17. Time display
18. Digital filter bandwidth
19. Spectrum bandwidth
20/21. NR/NB display
22. RIT/XIT frequency offset
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Rear Panel Interface
06
1. Antenna interface
HF/50MHz/144MHz/430MHz antenna port
(M type), the output impedance is 50Ω.
2. DC power interface.
The specification of power interface is 5.5*2.5.
Use the standard DC power cord to connect to a
regulated power supply or battery. The power
supply must be able to provide a current of
6A@(13.8～16.8)V to ensure the full power
output of the radio. Need 15V-16.8V if using
higher power in HF band (note it generates more
heat), under 15V for UV band.
If the power supply less than 12V or more than
18V, the radio will be with limit power output.
3. SELEVE USB interface
It is used to connect the USB cable to the
computer and can output audio, digital and IQ
signals.
4. RS232 serial interface
5. Electric key interface
This interface is a 3.5mm three-core interface,
used to connect electronic automatic key control
or ordinary hand keys.
6. Network interface
Used for remote control and remote firmware
update.
7. GPS antenna port
Connected to an active GPS antenna.
8. PTT control output.
Used to control the amplifier’s PTT.
9. Audio output.
Demodulated audio output
It is used for connecting peripheral smart
devices, such as external wave wheels.
10. HOST USB interface
The function of this interface is temporarily
reserved. Please be careful if used for
charging external devices.
11. Grounding post
To achieve the best performance and ensure
safety, you can use a short and thick copper
stranded wire to connect this ground terminal
to the ground well.
Interface Definition
Key
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07
Power
Audio output/headphone interface
Hand microphone
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08
Radio Setting and Operation
Please follow this guide to learn how to quickly set up and use your new equipment QR20.
To activate transmitting: Long press [MENU] - select [SET] - select [TX-EN] – select [ON] – long
press [MENU] again to exit.
Turn on/off QR20
1. To turn on the radio, simply long press the power button for one second.
2. To turn off the radio, simply long press the power button for one second.
Note: QR20 is with power-off data saving function. For example, when powered-off on 7.050Mhz
LSB, it will directly restore the data status (7.050Mhz LSB) before. This function is great for
remote operation.
Frequency band selection
1. The frequency range of QR20 is very wide. Short press [BAND] to pop up
the frequency band menu.
2. Short press the direction keys to select, short press [MENU] to confirm the
frequency band.
Frequency selection
1. Short press the left and right direction keys to select the cursor position in image, short press the
up-direction key to adjust the frequency, long press the up and down direction keys to quickly
select the required frequency.
2. Input the required frequency by direct numeric keyboard.
For example: if you want to enter 14.270MHz, press the numeric keyboard: 014270000 or
14.270000, and then press the key [MENU] to confirm.
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09
Mode selection
The QR20 all bands support LSB、USB、CW、FM. Short press [MODE] button to select them. Note
that switch between LSB/USB, CW/CWR, and WFM/NFM need to long press [MODE] button.
Transmit power selection
1. Short press [PA] to enter the transmit power adjustment, use the up and down direction keys to
adjust the value.
2. Long press [PA] to quickly select the 5W/20W power, each selection can be fine-tuned by the up
and down direction keys.
Receive volume, MIC gain
1. Short press the [AF] button to enter the AF interface, use the left and right direction keys to select
the setting section, use the up and down keys to set the value.
SVOL: Volume
HVOL: Front-panel headphone volume
MIC: MIC gain
CMP: MIC compression ratio
BAS: Bass
TRB: Treble
Hand microphone selection
1. QR20 comes with a wired speaker, plug directly into the MIC port on the front panel.
When the wired speaker is connected to the radio, the MIC gain cannot be adjusted too much. In
2.
SSB, if the wired speaker PTT is pushed and there is no speech and environmental noise but the
radio power meter has an output, then the hand microphone gain is too large and needs to be
reduced. It is so small that there is no power output when the hand microphone is quiet.
Usually, LSB mode is used below 7Mh, USB mode is used above 14MHz, and FM mode is used
above 28MHz. Please check your radio license before transmitting and abide by local laws and
regulations.
Channel saving
1. Long press [AF] to the channel mode
Long press the left and right direction keys to turn the numbers beside CH to red, short press
2.
[MENU] to turn to green. When in green, use up and down direction keys to operate the channel
mode.
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In channel mode. When in a non-stored channel (or want to replace an existed one), there is a
3.
RENAME icon. Long press the right direction key to turn the RENAME to red, short press [MENU]
to pop up the input box.
3-1. Input method: currently only supports the input of letters and numbers.
3-2. Long press the number 1 key to switch the input of uppercase letters, lowercase letters,
numbers and punctuations, and short press the [MODE] button to delete.
3-3. When in punctuation, short press the [.] in left keypad to switch the selection among [, . ? ! : ;
' " ( ) < > [ ] { } $ % @ * + - = ~]. Short press the [MODE] button to delete.
3-4. When in letter, short press the number keys to select letters. Short press [2] to select A, twice
for B and triple for C.
2=ABC 3=DEF 4=GHI 5=JKL 6=MNO 7=PQRS 8=TUV 9=WXYZ
3-5. When in number, press [MENU] to confirm you input. Then adjust the frequency, mode, and
other corresponding parameters on the interface, and it will be automatically stored when the
radio is turned off.
4. Enter the next channel and repeat the above operation.
10
Band selection operation
Short press the [BAND] button to pop up the frequency band selection interface, press the direction
key to select the frequency band, and press the MENU key to confirm.
Different frequency operation
Short press [SPLI] to display the different
frequency, press again to turn off the
different frequency, press the left and right
direction keys to select the frequency, press
the up and down direction keys to increase
or decrease the frequency. The upper row of
frequencies is the receiving frequency and
the lower row is the transmitting frequency.
Press [A/B] to switch.
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11
AF audio setting
Short press the [AF] button to enter the AF interface, use the left and right direction keys to select the
setting item, and use the up and down buttons to set the value.
SVOL: Volume
HVOL: Panel headphone
volume
MIC: MIC gain
CMP: MIC compression ratio
BAS: Bass
TRB: Treble
RF setting
Short press [RF] to enter the RF parameter setting interface, use left and right direction keys to select
the setting item, and use the up and down keys to set the value.
RFG: RF gain
IFG: IF gain
AGC: Automatic gain adjustment speed
SQL: Squelch level (FM)
AMP: Pre-amplification
USB sound card data output format setting
Long press the [RF] key to enter the USB sound card data output format selection interface, press
the up and down keys to select the output mode. Press and hold again to exit.
USB: Select USB when using digital modes like
FT8/HRD/N1MM/LOG32/RTTY
SDR: Select SDR when using software like SDR#/HDSDR
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12
Transceiver frequency offset setting
Long press [R/X] to open the interface for sending and receiving frequency offset setting, long press
again to exit. Short press to select the receiving frequency offset RIT, short press again to set the
transmitting frequency offset XIT. Use the left and right direction keys to set the frequency deviation
frequency. Frequency offset frequency = key display value * 20Hz.
Transceiver mode setting
Short press [MODE] button to select the mode.
In FM mode: long press to select NFM/WFM
In SSB mode: Long press to select USB/LSB
In CW mode: Ling press to select CWL/CWR
Followed by recycling AM, FM, USB (LSB), CW
Tune operation
1. Short press [Power] key to switch to SWR standing wave meter.
2. Long press the [TUNE] key to enter the automatic tuning mode. The machine will make a short
sound of click. The T on screen will turn green. Long press [TUNE] to exit if want to stop during
tuning. T turns green when succeed, turn gray when fail. Short press [TUNE] to turn off the tuner
when T is in green status.
3. Long press [.], QR20 will automatically enter 5W CW mode long tone transmission status. With
the standing wave, you can directly observe the SWR value of the antenna standing wave and
adjust your antenna feed system. Short press [.] again to exit.
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13
A/B frequency operation
Short press [A/B] button to switch A/B frequency, long press A frequency=B frequency.
NR/NB noise suppression setting
Short press [NR] to turn on NR/NB, short press again to switch NR/NB (normally select NR).
Short press [BW] to turn on the digital filter (green display in image), short press the left and right
direction keys to decrease the bandwidth to 4.8K.
When the NR is working, long press [DSP] to turn off NR/NB.
Spectrum and waterfall display setting
Long press the [NR] key to select and switch the display way amount Waterfall Only – Spectrum
Only – Both Waterfall and Spectrum.
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Spectrum parameter display setting
Long press [BW] button to set spectrum
bandwidth, reference level, refresh rate, up and
down direction buttons to select setting items, left
and right direction keys to set value.
SPAN: spectrum bandwidth
REF: spectrum reference level
SPEED: Spectrum refresh rate
Digital filter operation
Short press [BW] key to select digital filter
(green display in image), left or right direction
key to select filter bandwidth, short press [BW]
key to ensure filter bandwidth (green will turn to
white).
14
Application Menu Operation
Long press the [MENU] key to enter the menu interface, long press the [MENU] key to exit the
menu interface. Left and right, up and down keys to select the application, and short press the
[MENU] key to select the application.
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1. Radio operation
Use the left and right buttons to search for the channel, up and down buttons to increase or
decrease the volume. Long press to exit the radio function.
2. GPS operation (*DIR) – optional module
Directly display the UTC time, latitude and longitude, speed, direction, altitude, etc. received by
the GPS module.
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3. Digital compass operation (*MESSAG) – optional module
4. Bluetooth operation (*BT) – not available now
5. Music player (*MUSIC) – under developing
6. VSWR standing wave scanning
- Long press Menu button to exit
- Use the left and right keys to select BAND,
Maker and START
- Select BAND to select different bands
- Select Maker then use the left and right keys to learn the
band frequency’s standing wave value
- Select START to scan the antenna standing wave value
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7. APRS
8. Setting (*SET)
- KEY-LED: Key buttons backlight on/off
- OUT-BAND-EN OFF: Lock BAND key band pool data
- TX-EN: Transmitting switch (need to turn on when the gear is activated)
- KEY-VOLUME: Key buttons volume
- BACKLIGHT: Screen brightness
- HOUR: Time setting of hour
- MINUTE: Time setting of minute
- SECOND: Time setting of second
- FAN-EN-TEMP: Fan temperature control
- VSWR-THRESHOLD: Standing wave protection threshold (OFF means no threshold)
- VSWR-TUNER: Antenna tuner threshold (stop tuning if lower than the setting)
- TOT-TIMER: Transmitting time limit
- TX-DISABLE-10M: 10M band transmitting switch
- FW-VERSION: Version number
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CAT Control
Radioddity QR20 comes with a CAT system. You can use a personal computer to control the radio
with a mouse and simple clicks. It also supports the control of third-party software (such as radio log
software for competitions), so no additional operator is needed. The CAT protocol is compatible with
FT-817, just choose the FT-817 radio model during CAT control.
For CAT control, a TYPE-C USB cable connected to a PC would be enough. Note the serial port
driver is only suitable for WINDOWS 10 system. The USB cable also integrates the sound card
function. One USB cable realizes CAT control and data transmission. Due to the wide variety of
computers, operating systems, and various application software, Radioddity does not develop
system control software, but QR20 widely supports various third-party control software.
Receiving Operation
The QR20 will be in reception status when power on.
1. Select a frequency and mode. For example: 14.270MHz\USB.
2. Short press the [AF] button to pop up volume control interface, press the up and down direction
keys to adjust the volume, short press the [AF] button again to save and exit.
3. Short press the [RF] button to pop up the radio frequency setting interface. Use the left and right
direction keys to select, press the up and down keys to set the value, then short press the [RF]
key again to save and exit.
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3-1. RFG: Radio frequency gain.
3-2. IFG: Intermediate frequency gain.
Through the combination of RFG and IFG, the receiver will achieve the highest sensitivity and the
lowest noise level. Usually, you need to increase these two parameters if you want to hear a very
weak signals, but the noise will also increase. You need to carefully adjust to achieve a balanced
state. Usually, the intermediate frequency gain can be opened higher than the radio frequency gain.
3-3. AMP pre-amplifier. It includes A and B.
3-4. MIC gain. If the gain is turned on too high, it will cause the sensitivity of pickup to increase
greatly, causing MIC overload. The result is that there will be transmitting power and noise
even you don’t speak when the PTT is pushed. The balance would be, no power in SSB
mode when the speaker mic is pushed.
4. Long press the [BW] button to set the spectrum bandwidth, reference level, refresh rate. Use up
and down keys to select, left and right buttons to set the value, and long press the [BW] button
again to exit. You can see other signals within the bandwidth through the spectrum display.
4-1. SPAN: spectrum bandwidth, 1.5K, 3K, 6K, 12K, 24K, 48K available
4-2. REF: Spectrum reference level.
4-3. SPEED: Spectrum refresh rate.
5. Frequency spectrum and waterfall display settings
Long press the [NR] key to select the waterfall display, long press again to switch to spectrum, long
press again to show them simultaneously.
6. Digital filter operation. QR20 is with a powerful digital filter.
Short press the [BW] button to select the digital filter. When turned on, the original white horizontal
line on the spectrogram will be displayed in green. Use left and right keys select the filter bandwidth,
short press the [BW] button again to confirm the filter bandwidth and exit.
Different band widths can effectively avoid interference signals, achieving excellent listening effects.
7. NR/NB noise suppression settings. Normally this option must be combined with a digital filter to
achieve best results.
7-1. Short press [NR] key to turn on and gain to switch NR/NB. Long press [DSP] key to turn off
NR/NB. Short press [DSP] to set NR/NB/PEAK threshold, use up and down keys to select
NR/NB/PEAK, left and right keys to set the value, short press [DSP] again to exit.
7-2. Find the signal you need, turn on NR, usually the NR is more obvious, and adjust the digital
filter to the maximum bandwidth, and then reduce the bandwidth of the digital filter little by
little. When it is 4.8K, the noise will be greatly suppressed. At this time, you can also adjust
the combination of the previous RFG and IFG to achieve the best reception effect.
Through the above settings, you have mastered the advanced reception settings of QR20,
congratulations!
17
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18
Transmitting operation (locked by default)
SSB communication
1.
Press the [MODE] key to select one of the SSB (LSB or USB) modes. If you are operating at 7MHz
or below, please select LSB mode. If you are operating at 14MHz or above, please select USB
mode.
2.
Short press [Power] key, the screen switches between ALC, SWR, AUD meter display.
Push the PTT button on the speaker and talk in normal voice, observing the ALC meter display.
3.
When the microphone enters the actual voice level, there will be a corresponding amplitude
display on the AUD meter. Release the PPT button to return to the receive mode.
4.
If the ALC meter shows too high or too low, you can reset the microphone gain value as follows:
Long press the [AF] key for one second to enter the selection mode, use left and right keys to
select MIC, use the up-direction key to set value, long press [AF] key again to exit. Speak into the
microphone until AUD appears at the peak of your voice
CW communication
When using hand keys, automatic keys, semi-automatic keys, an external electronic key control or
a computer-generated keyboard device, please follow the steps below:
Insert your 3.5mm (three-phase or two-phase) plug into the KEY jack on the rear panel.
1.
Short press [MODE] to select a CW mode (CW or CWR), "CW" mode uses the carrier input on the
2.
USB side, and CWR (reverse) mode uses the input on the LSB side.
Long press [BAND] key to enter CW setting. Up and down arrow keys on keyboard
3.
Select an option and use the left and right arrow keys to adjust the settings within the option.
3-1. KEY MODE left and right direction key selection content: manual electric key | automatic
electric key
3-2. KEY SPEED automatic key code rate, the greater is the
value, the faster is the speed.
3-3. TX-RX CW transmission and reception switching time,
the greater is the value, the greater is the delay.
3-4. STF CW side tone audio
3-5. STG CW side tone volume
3-6. TRAINING training mode, no transmission
FM communication
The QR20 supports full-band FM mode transmission and reception. It is usually used for FM
communication above 28MHz in short-wave communication. 29.6MHz is called the magic band by
the HAM community. It will be opened in a short time in the summer of the year, which is very
challenging.
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Short press [MODE] key to switch to FM mode, long press [MODE] key to switch between WFM
1.
mode and NFM mode.
QR20 includes UV band FM, you can communicate with handheld walkie-talkies, or you can
2.
connect it to a local repeater.
Short press [RF] key, use left and right direction keys are to select SQL, squelch option, use up
3.
and down direction keys to set squelch level.
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Repeater operation
1. Set the required frequency, for example, repeater parameters (receiving 145.670MHz,
transmitting 144.130MHz, CTCSS 88.5) are set as follows:
1-1. Press SPLI to display the different frequency, press again to turn off the different frequency.
The upper row of frequencies is the receiving frequency, press the left and right direction keys
to select the frequency, press the up and down direction keys to increase or decrease the
frequency, or directly enter the numeric keyboard: 14567000. The lower row of frequencies is
displayed as the transmission frequency, directly enter 14413000 on the keyboard. Press the
A/B key to switch between the upper/lower row.
1-2. Tone setting. Long press the [MENU] key, use direction keys to select the [SET] to enter the
SYS_SET interface, press the right direction key to expand the menu, then use the up and
down keys to select T-CTSC and R-CTSC tone, use the left and right direction keys select the
value 88.5.
Long press [MENU] to exit to the application menu interface, and then long press [MENU] to exit
to the radio interface.
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20
AM communication
1. Press the [MODE] key to select the AM mode and set the required frequency
2. In AM mode, the input RF power is 5W
Data communication RTTY
QR20's "RTTY" mode is based on the long-term use of amateur radio, based on the LSB carrier. If
you want to use the USB carrier for "RTTY" operation, you need to set up as the following
introduction.
1. Connect your computer and QR20 via s USB cable.
2. Long press the RF key to enter the USB sound card data output format selection interface, use
the up and down keys to select the output mode. Press and hold again to exit. Select [USB] digital
mode.
3. At this time, you can search on the frequency. If there is RTTY signal, the relevant computer
software can decode.
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21
QR20 Firmware Upgrade
1. Open the Dfuse Demo software.
2. Plug the QR20 power supply and connect it to USB.
3. Hold down the [BAND] key and then hold down the [POWER] key. At this time, if the computer is
connected to the QR20 correctly, ① will display (STM Device in DFU Mode). Otherwise, please
check whether the computer is properly connected to the QR20.
4. Select the firmware file *.dfu ②
5. Hold down the [BAND] and power keys, click Upgrade button. ③
At this point, the upgrade begins, wait for the progress bar to finish, release the button, and restart
the computer.
6. If you let go of the button or power off halfway, you only need to restart the operation.
Copyright Statement
All Rights Reserved, 2021
Radioddity reserves all rights of the manual. All parts of the manual shall not be copied without
permission.
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