Kodētāja modulatora dekodētāja demodulatora moduļa parametru konfigurācijas instrukcijas COFDM AT Command

Kodētāja modulatora dekodētāja demodulatora moduļa parametru konfigurācijas instrukcijas COFDM AT Command

Encoder Modulator Decoder Demodulator Module
COFDM-RF-demodulators-dekodētājs-uztvērējs-H264-Vcan1776RX-H264

Download the Encoder Modulator Decoder Demodulator Module Parameter Configuration Instructions below if you need a PDF file.

Update Record:

versijaDatumsapraksts
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2016-10-24
2016-11-1
2016-12-26
2017-2-14
2017-2-28
2017-3-27
2017-4-19
2017-5-18
2017-9-12
2018-3-15
2019-6-25
2023-2-24
Initial version
ATDR reply distinguishing module
ATSE, ATGE add audio switch
Add ATSP protocol
Add ATST, ATGT protocol
ATGE command add AESfor status acquisition
Added ATGB protocol
AV and HDMI output control
Support for obtaining the current AV output standard
Added ATSU, ATGUcommands
Added ATOSD, ATSIP, ATGIP commands
Added ATSAD, ATGAD commands

Users may need to modify the configuration parameters of the module during the use of the COFDM modulator and demodulator module. In order to simplify the user’s operation, we design the parameter configuration into a few simple AT commands. The user only needs to use the specified AT command and pass the corresponding parameters to complete the parameter setting of the COFDM module.

Suitable Models

Command Introduction

The AT command for configuring COFDM module parameters starts with “AT” and ends with an underscore_”. Each AT command has several or no parameters, and each AT command has a return value. For details, please refer to the introduction of the following commands.

Users can configure the parameters of the module through the configuration serial port (TTL līmenis, 3.3V) of the COFDM module. For detailed serial port configuration, refer to the figure below. Please use tools such asSerial Port Debugging Assistantto send AT commands to the COFDM module, pay attention to the use of teksts, piemēram:

Encoder Modulator Decoder Demodulator Module Parameter Configuration Instructions COFDM AT Command 1
Kodētāja modulatora dekodētāja demodulatora modulis

Command Classification

The AT commands for configuring COFDM module parameters are mainly divided into the following two categories:

Query CommandsATDR, ATGD, ATGE, ATGI , ATGR, ATGT, ATGB, ATGU, ATGIP
Setting CommandsATSD, ATSG, ATSM, ATSE, ATSI, ATSO, ATSR, ATSP, ATST, ATSU,ATOSD, ATSIP

From the perspective of whether to save after power-off, the setting commands can be divided into:

Power-off Saving CommandsATSD, ATSE, ATSI, ATSO, ATSR, ATSP, ATST, ATSU, ATSIP
Power-off Not Saving CommandsATSG, ATSM, ATOSD

According to the configuration transmitter or receiver, the classification is as follows:

Sender Configuration CommandsATDR, ATSD, ATGD, ATSG, ATSM, ATSE, ATGE, ATSI, ATGI, ATSO, ATSP, ATST, ATGT, ATSU, ATGU, ATOSD
Receiver Configuration CommandsATDR, ATSR, ATGR, ATSP, ATST, ATGT, ATGB, ATSIP, ATGIP

Command Details

Ping Command

formātsATDR_
parametrs
lietošanafor the integrated system to check whether the serial port is connected and identify the connected modules.
Atdeves vērtībaRCB returns thedevice profilestring
SUE1 returnsATDRSUE1 OKstring
SHD1 returnsATDRSHD1 OKstring
Piezīmevaicājuma komanda

Set Device Command

formātsATSD $(mimo), $(gi), $(COFDM bezvadu pārraides sistēmas pārraides ātruma aprēķins), $ (zvaigznājs), $(frekv(KHz)), $(bw(KHz)), $(tx1_gain), $(tx2_gain)_
Piemērs: ATSD0,1,0,0,800000,8000,86.0,86.0_
parametrsOne Antenna/Dual antenna mimo: 0 mimo disable; 1 mimo enable
Guard Interval GI: 0 1/32; 1 1/16; 2 1/8; 3 1/4
Convolution Code Rate: 0 1/2; 1 2 /3; 2 3/4; 3 5/6; 4 7/8;
zvaigznājs: 0 QPSK; 1 QAM16; 2 QAM64;
RCB Carrier Center Frequency(kHz) 200000~2700000(200MHz~2.7GHz, 1KHz solis)
RC900 Carrier center Frequency(kHz) 750000~930000(750MHz ~ 930MHz, 1KHz solis)
RCB Channel bandwidth bw(KHz) 2000~8000(2MHz ~ 8MHz, 1KHz solis)
RCB Channel bandwidth bw(KHz) 2000~8000 (2MHz ~ 8MHz, 1KHz solis)
Transmitting antenna 1 gain tx1_gain 0.0~89.75dB, 0.25dB pakāpju
Transmitting antenna 2 gain tx2_gain 0.0~89.75dB, 0.25dB pakāpju
Return Valuepiemēram,:ATSD0,1,0,0,800000,8000,86.0,86.0_
SISO,GI: 1/16, CR:1/2, MOD: QPSK, frekv:800000KHz,bw:8000KHz,tx1_gain:86.000000 tx2_gain:86.000000 labi
PiezīmeSet command, save when power off.
Different Bandwidths, Guard intervāli, Convolution code rates, Data rate calculation formulas corresponding to constellations
Air interface rate Rate(COFDM bezvadu pārraides sistēmas pārraides ātruma aprēķins) COFDM bezvadu pārraides sistēmas pārraides ātruma aprēķins (joslas platums(MHz) * 8.0/7.0) / (1+GI) * 1512/2048*COFDM bezvadu pārraides sistēmas pārraides ātruma aprēķins(COFDM bezvadu pārraides sistēmas pārraides ātruma aprēķins) * COFDM bezvadu pārraides sistēmas pārraides ātruma aprēķins * 188/204.
Taking 8MHz bandwidth as an example, different guard intervals, convolution code rates, data rates corresponding to constellations and required receiving signal-to-noise ratiosC:\Users\timyep\AppData\Roaming\Tencent\Users\157871537\QQ\WinTemp\RichOle\E0XEBCD_M4WD[M1BWR$}TK4.png

Set Gain Command

formātsATSG$( tx1_gain),$( tx1_gain)_
Piemērs: ATSG85.0,85.0_
parametrstx1_gain: raidītājs 1 iegūt
tx2_gain: raidītājs 2 iegūt
lietošanaTo dynamically adjust the output power. If the signal SNR/RSSI of the receiver is high, the output power can be reduced through the remote control link. When the SNR/RSSI of the end signal is low, increase the output power (raidītājs)
Return Value,Piemērs: ATSG85.0,85.0_set gain 85.000000 85.000000 labi
Piezīmesetting command, power off will not save.

Set Modulation Mode command

formātsATSM$(gi), $(COFDM bezvadu pārraides sistēmas pārraides ātruma aprēķins), $(zvaigznājs)_
Piemērs: ATSM1,1,2_
parametrsGard interval GI: 0 1/32; 1 1/16; 2 1/8; 3 1 /4;
Convolution code rate: 0 1/2; 1 2/3; 2 3/4; 3 5/6; 4 7/8;
zvaigznājs: 0 QPSK; 1 QAM16; 2 QAM64
lietošanaDynamically adjust the air interface rate, the air interface rate can be increased when the distance is short, and the air interface rate can be reduced when the distance is long (raidītājs)
Return ValuePiemērs:ATSM1,1,2_GI:1/16, CR:2/3, MOD: QAM64, labi
Piezīmesetting command, power off will not save.

Get Device Status Command

formātsATGD_
parametrs
lietošanaquery the current number of transmit antennas, aizsargs intervāls, convolution code rate, number of constellations, transmit frequency, joslas platums, gain parameters (raidītājs)
Return ValuePiemērs: ATGD_
SISO, GI:1 /16, CR: 1/2, MOD: QPSK, frekv: 800000KHz, bw: 8000KHz, tx1_gain: 86.000000 tx2_gain: 86.000000 labi
Piezīmevaicājuma komanda

Set Encoder Command

formātsATSE$(llc),$(rt),$(bitrate) ,$(gop),$(audio)_
Piemērs: ATSE0,0,0.0,0,0_
parametrs1. Enhanced data reliability option llc: 0 disable; 1 enable (requires the receiving end to enable this option at the same time, use in pairs, because more redundant data is added to enhance reliability, the video bit rate of the transmitting end should be set when this option is turned off half of)
2. Real-time priority/quality priority rt: 0 image quality priority; 1 real-time priority;
3. Bitu pārraides ātrums: 0 let system decide; >0 specify bitrate(float)
4. I frame interval GOP: 0 let system decide; >0 specify GOP
5. Audio encoding option audio: 0 disable; 1 enable
lietošanaUsed to set encoding parameters (raidītājs)
Return ValuePiemērs:ATSE0, 0,0.0,0,0_
MODE:0,RT:0,bitrate: 0.0Mbps,gop:0,audio:0,labi
Piezīmesetting command, save when power is off.

Get Encoder Command

formātsATGE_
parametrs
lietošanaquerying encoding parameters (sending end)
Return ValuePiemērs:ATGE_MODE:0, RT:0,bitrate:4.0Mbps,gop:10,audio:0,aes:0, labi
PiezīmeQuery command AES means the current encryption status: 0 disable; 1 enable

Get Input Command

formātsATGI_
parametrs
lietošanaquery the current camera input parameters (raidītājs)
Return ValuePiemērs:ATGI_input_size: 1080p, input_rate: 60kadri, sensor_type: hdmi,labi
Piezīmevaicājuma komanda

Set Input Command

formātsATSI$(input_size),$(input_rate)_
Piemērs: ATSI1080,25_
parametrs1. Input resolution input_size: 0 let the system detect; >0 specify input size
2. Input frame rate input_rate: 0 let the system detect; > 0 specify input fps
lietošanaTo specify the input resolution and frame rate to meet some special signal sources, or some special application needs (raidītājs)
Return ValuePiemērs: ATSI1080,25_
Input_size:1080p,input_rate: 25kadri, labi
PiezīmesAfter the user specifies the input resolution and frame rate through this command, the system will no longer detect the signal source (use with caution). The user can restore the default through the following command: ATSI0,0_Set the command and save it after power-off.

Set Output Command

formātsATSO$(output_size),$(output_rate)_
Piemērs: ATSO720,30_
parametrs1. raidītājs: encoding output resolution output_size: 0 equal to input_size; >0 specify output size
2. Saņēmējs: HDMI output resolution (720, 1080)
3. raidītājs: encoding output frame rate output_rate: 0 equal to input_rate; >0 specify output_rate (kadri)
4. Saņēmējs: HDMI output frame rate 720p supports frame rate (50, 60); 1080p supports frame rate (24, 25, 30, 50, 60)
lietošana1. raidītājs: Used to specify the encoding output resolution and frame rate to meet the requirements of certain applications for zooming and frame reduction
2. Saņēmējs: used to configure the resolution and frame rate of HDMI output
Return ValuePiemērs: ATSO720,30_
output_size: 720p, output_rate: 30kadri, labi
Piezīmes1. For HDMI input only, this command is invalid for AV input
2. Output_size <= input_size; output_rate<=input_rate
3. Set the command and save it after the power is off.

Set Input Sources Command (switch HDMI / CVBS ieeja)

formātsATSU$(vin),$(ain)_
Piemērs: ATSU0,1 _
parametrs1. Video input selection VIN: 0 let the system detect; 1 force CVBS input; 2 force hdmi/SDI input
2. Audio input selection AIN: 0 let the system detect; 1 force analog input
lietošanaUsed to meet specific application requirements (Piemērs: HDMI/SDI input video, MIC input audio)
Return ValuePiemērs: ATSU0,1_
ATSU0,1 OK
Piezīmesetting command, power-off save.

Get User Command

formātsATGU _
Piemērs: ATGU_
parametrs
lietošanaTo query user-specific configuration
Return ValuePiemērs: ATGU_
ATGU0,1 OK
Piezīmevaicājuma komanda
return parameter description please refer to the ATSU command

Set Receiver Command

formātsATSR $(frekv), $(bw ), $(llc), $(cvbs)_
Piemērs: ATSR320000,6000,0,0_
parametrs1. DR2C carrier frequency freq(KHz) 200000~860000(200MHz ~ 860MHz, 1KHz solis)
2. DR900 carrier center frequency freq(KHz) 200000~1600000(200MHz~1.6GHz, 1KHz solis)
3. DR2C channel bandwidth bw(KHz) 2000~8000(2MHz ~ 8MHz, 1KHz solis)
4. DR900 channel bandwidth bw(KHz) 3200~8000(3.2MHz ~ 8MHz, 1KHz solis)
5. Enhanced data reliability option llc: 0 disable; 1 enable (it is required that the transmitter should also enable this option at the same time, and use it in pairs. Since more redundant data is added to enhance reliability, the video bit rate of the transmitter should be set to when this option is turned off half of)
6. AV output system cvbs: 0 pal; 1 ntsc
lietošanaTo set the receiver parameter
Return Valueexample: ATSR320000,6000,0,0_
ATSR320000,6000,0,0 OK
Piezīmesetting command, save when power is off.

Get Receiver Command

formātsATGR_
parametrs
ATGR_the receiving end parameter
Return ValuePiemērs: ATGR_
ATGR320000,6000,0,aes:0,cvbs:0 labi
Piezīme1. Query command
2. Aes parameter indicates the current encryption status: 0 disable;1 enable
3. CVBS parameter Indicates the current AV output standard: 0 pal;1 ntsc

Get Bit Error Rate Command

formātsATGB_
parametrs
lietošanaquerying the bit error rate and signal strength of the dual antennas at the receiving end
Return ValuePiemērs: ATGB_
ATGB ber1:0.00% ber2:0.00% RSSI1 :54 RSSI2:53 Lock1:1 Lock2:1 labi
Piezīmes1. Query commands
2. Ber1 and ber2 respectively indicate the bit error rate of each antenna, ranging from 0.0% līdz 100.0%
3. RSSI1 and RSSI2 respectively indicate the signal strength of each antenna, ranging from 0 līdz 100
4. Lock1 and Lock2 respectively indicate the signal locking status of each antenna (1 Represents signal lock)

Set Password Command

formātsATSP$(parole), $(parole)_
Piemērs: ATSP123456, 123456_
parametrsAES key password: 6-digit password (ASCII)
AES key password: 6-digit password (ASCII) (repeat it for confirmation)
lietošanaUsed to set the AES key of the transceiver (raidītājs un uztvērējs)
Return ValuePiemērs: ATSP123456_
ATSP123456 OK
Piezīme1. When the password is all 0, AES encryption is turned off.
2. Set the command and save it after powering it off.

Set Data Transfer Command

formātsATST$(pārraides ātrumu), $( parity)_
Piemērs: ATST115200,0_
parametrs1. Baud rate baud rate: 1200、2400、4800、9600、19200、38400、57600、115200
2. Check Code: 0: Nav; 1: Odd; 2: Even
lietošanaUsed to set the baud rate and parity bit of the serial port for data transparent transmission
Return ValuePiemērs: ATST115200,0_
ATST115200,0 OK
PiezīmesSet command

Get Data Transfer Command

formātsATGT_
parametrs
lietošanaUsed to query the baud rate and check code
Return ValuePiemērs: ATGT_
ATGT115200,0 OK
PiezīmesQuery command

Set IP Address Command

formātsATSIP$(ip), $(ip)_
Piemērs: ATSIP192.168.1.215,192.168.1.215_
ParametriLocal IP address
Local IP address (repeat to confirm)
lietošanaUsed to set the receiver IP address
Return ValuePiemērs: ATSIP_192.168.1 .215,192.168.1.215_
ATSIP192.168.1.215 OK
Piezīmes1. After setting the IP address, the receiving end needs to be restarted to take effect.
2. Set the command and save it after powering it off.

Get IP Address Command

formātsATGIP_
Piemērs: ATGIP_
parametrs
lietošanalai vaicātu saņēmēja gala pašreizējo IP adresi
Atdeves vērtībaPiemērs: ATGIP_
ATGIP192.168.0.215 Labi
Piezīmevaicājuma komanda

OSD Overlay Protocol

formātsATOSD$(idx), $(x), $(y), $(str)_
Piemērs:ATOSD0,40,20,height: 100m_
parametrs1. IDX index: 0~7 (supports OSD overlay for 8 areas)
2. X-coordinate: 0~1919
3. Y coordinate: 0~1079
4. str: the string to be displayed at the corresponding coordinates (the space symbol is used to clear the display)
lietošanaon the video screen.OSD information
Atdeves vērtība
Piezīmes1. The user specifies the x and y coordinates of the OSD display according to the maximum 1920×1080 pikseļi, and the system will correct the coordinates according to the actual display situation.
2. The ‘_character cannot be contained in the str parameter

Set Gain To Adjust

formātsATSAD$(frekv),$(adjust) _ Piemērs:ATSAD700000,2.5_
parametrswireless central working frequency:   Frek(KHz) 200000~2700000(200MHz~2.7GHz, step: 1KHz) Adjust the value(dB):       ATSD cmd will subtract this value to set the wireless gain
funkcijaSpecify and adjust the value for the wireless gain setting using by ATSD cmd
AtsauksmesPiemērs: ATSAD700000,2.5_ freq:700000,adjust:2.50 labi
komentāriSetting command is still valid when stopping power or resetting.

Get Gain To Adjust

formātsATGAD[$(frekv)]_ Piemērs:ATGAD700000_
parametrswireless central working frequency:   Frek(KHz) 200000~2700000(200MHz~2.7GHz, step: 1KHz) When no parameter provides, it will list all the freq that have adjusted value.
funkcijaInquiry adjust the value for wireless gain setting using ATSD cmd
AtsauksmesPiemērs: ATGAD700000_ freq:700000,adjust:2.50 OK ATGAD_ freq:700000 750000 labi
komentāriInquiry command.

Serial Port Utility software download

https://www.alithon.com/downloads

Bieži uzdotie jautājumi

1. How can I return to the No Password setting with 000000 indications after the change?

Reset the password to 000000 (one must not be missing) through the Parameter Configuration Panel Board.
or set it through un ATSP_command

2. I see that Gain is the output power of the transmitter. Please tell me the range of settings of this parameter. All setting level (Iegūt) good for linear output operation? Or do you suggest some limited range for better linear operation?

The Gain of the COFDM configuration is the internal Gain, not the actual output power of the transmitter. The internal gain range is 0~89.75dB and the linear output:
1. At around 300~500MHz, the Gain is set to 89.75, and the actual output power of the transmitter module is about -5dBm.
2. At around 1000~1500MHz, the Gain is set to 89.75, and the actual output power of the transmitter module is about -6dBm to -10dBm.

3. I tried to setB bandwidth (kHz) and E bit rate (Mbps). When I set E, the new value does not apply. Tātad. the E setting is only for monitoring of available bitrate? if I wish to change the E (Bitu pārraides ātrums) I have to change only B (joslas platums)? Am I right?

It is not recommended to modify the video bit rate ‘Edirectly, because if the output video bit rate is greater than the wireless air interface rate, the system will not work normally.
Pēc noklusējuma, the internal video bit rate ‘Ewill be set to 0 for automatic. Customers only need to modify ‘Bto modify the wireless parameters, and the video bit rate will automatically adapt.
You can also adjust the wireless air interface rate by modifying GI and CR.

For more details on the Encoder Modulator Decoder Demodulator Module, please send an inquiry to us.

COFDM modulatora demodulatora moduļa kodētāja dekodētājs HDMI CVBS AV ieeja AES 256 FHD RF straumēšana

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