Codificador Modulador Decodificador Demodulador Módulo Parâmetros Instruções de Configuração COFDM Comando AT
Download the Encoder Modulator Decoder Demodulator Module Parameter Configuration Instructions below if you need a PDF file.
Update Record:
Versão | Encontro | Descrição |
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 (nível TTL, 3.3V) of the COFDM module. For detailed serial port configuration, refer to the figure below. Please use tools such as “Serial Port Debugging Assistant” to send AT commands to the COFDM module, pay attention to the use of texto, por exemplo:
Command Classification
The AT commands for configuring COFDM module parameters are mainly divided into the following two categories:
Query Commands | ATDR, ATGD, ATGE, ATGI , ATGR, ATGT, ATGB, ATGU, ATGIP |
Setting Commands | ATSD, 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 Commands | ATSD, ATSE, ATSI, ATSO, ATSR, ATSP, ATST, ATSU, ATSIP |
Power-off Not Saving Commands | ATSG, ATSM, ATOSD |
According to the configuration transmitter or receiver, the classification is as follows:
Sender Configuration Commands | ATDR, ATSD, ATGD, ATSG, ATSM, ATSE, ATGE, ATSI, ATGI, ATSO, ATSP, ATST, ATGT, ATSU, ATGU, ATOSD |
Receiver Configuration Commands | ATDR, ATSR, ATGR, ATSP, ATST, ATGT, ATGB, ATSIP, ATGIP |
Command Details
Ping Command
Formato | ATDR_ |
Parâmetro | Não |
Usar | for the integrated system to check whether the serial port is connected and identify the connected modules. |
Valor de retorno | RCB returns the “device profile” string SUE1 returns “ATDRSUE1 OK” string SHD1 returns “ATDRSHD1 OK” string |
Observação | comando de consulta |
Set Device Command
Formato | ATSD $(mimo), $(gi), $(Cálculo da taxa de transmissão do sistema de transmissão sem fio COFDM), $ (constelação), $(frequencia(KHz)), $(bw(KHz)), $(tx1_gain), $(tx2_gain)_ Exemplo: ATSD0,1,0,0,800000,8000,86.0,86.0_ |
Parâmetro | One Antenna/Dual antenna mimo: 0 mimo disable; 1 mimo enable Guard Interval GI: 0 1/32; 1 1/16; 2 1/8; 3 1/4 Convolution Code Rate: 0 1/2; 1 2 /3; 2 3/4; 3 5/6; 4 7/8; constelação: 0 QPSK; 1 QAM16; 2 QAM64; RCB Carrier Center Frequency(kHz) 200000~2700000(200MHz~2.7GHz, 1passo KHz) RC900 Carrier center Frequency(kHz) 750000~930000(750930MHz MHz ~, 1passo KHz) RCB Channel bandwidth bw(KHz) 2000~8000(2MHz~8MHz, 1passo KHz) RCB Channel bandwidth bw(KHz) 2000~8000 (2MHz~8MHz, 1passo KHz) Transmitting antenna 1 gain tx1_gain 0.0~89.75dB, 0.25passo dB Transmitting antenna 2 gain tx2_gain 0.0~89.75dB, 0.25passo dB |
Valor de retorno | tal como:ATSD0,1,0,0,800000,8000,86.0,86.0_ SISO,GI: 1/16, CR:1/2, MOD: QPSK, frequencia:800000KHz,bw:8000KHz,tx1_gain:86.000000 tx2_gain:86.000000 Está bem |
Nota | Definir comando, salvar quando desligar. Different Bandwidths, intervalos de guarda, Convolution code rates, Data rate calculation formulas corresponding to constellations Air interface rate Rate(Cálculo da taxa de transmissão do sistema de transmissão sem fio COFDM) Cálculo da taxa de transmissão do sistema de transmissão sem fio COFDM (largura de banda(MHz) * 8.0/7.0) / (1+GI) * 1512/2048*Cálculo da taxa de transmissão do sistema de transmissão sem fio COFDM(Cálculo da taxa de transmissão do sistema de transmissão sem fio COFDM) * Cálculo da taxa de transmissão do sistema de transmissão sem fio COFDM * 188/204. Taking 8MHz bandwidth as an example, different guard intervals, convolution code rates, data rates corresponding to constellations and required receiving signal-to-noise ratios |
Set Gain Command
Formato | ATSG$( tx1_gain),$( tx1_gain)_ Exemplo: ATSG85.0,85.0_ |
Parâmetro | tx1_gain: Transmissor 1 ganho tx2_gain: Transmissor 2 ganho |
Usar | To dynamically adjust the output power. If the signal SNR/RSSI of the receiver is high, the output power can be reduced through the remote control link. When the SNR/RSSI of the end signal is low, increase the output power (transmissor) |
Valor de retorno, | Exemplo: ATSG85.0,85.0_set gain 85.000000 85.000000 Está bem |
Observação | comando de configuração, power off will not save. |
Set Modulation Mode command
Formato | ATSM$(gi), $(Cálculo da taxa de transmissão do sistema de transmissão sem fio COFDM), $(constelação)_ Exemplo: ATSM1,1,2_ |
Parâmetro | Gard interval GI: 0 1/32; 1 1/16; 2 1/8; 3 1 /4; Convolution code rate: 0 1/2; 1 2/3; 2 3/4; 3 5/6; 4 7/8; constelação: 0 QPSK; 1 QAM16; 2 QAM64 |
Usar | Dynamically adjust the air interface rate, the air interface rate can be increased when the distance is short, and the air interface rate can be reduced when the distance is long (transmissor) |
Valor de retorno | Exemplo:ATSM1,1,2_GI:1/16, CR:2/3, MOD: QAM64, Está bem |
Observação | comando de configuração, power off will not save. |
Get Device Status Command
Formato | ATGD_ |
Parâmetro | Não |
Usar | query the current number of transmit antennas, intervalo de guarda, convolution code rate, number of constellations, transmit frequency, largura de banda, gain parameters (transmissor) |
Valor de retorno | Exemplo: ATGD_ SISO, GI:1 /16, CR: 1/2, MOD: QPSK, frequencia: 800000KHz, bw: 8000KHz, tx1_gain: 86.000000 tx2_gain: 86.000000 Está bem |
Observação | comando de consulta |
Set Encoder Command
Formato | ATSE$(llc),$(rt),$(bitrate) ,$(gop),$(auditivo)_ Exemplo: ATSE0,0,0.0,0,0_ |
Parâmetro | 1. Enhanced data reliability option llc: 0 disable; 1 habilitar (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. Bitrate: 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 habilitar |
Usar | Used to set encoding parameters (Transmissor) |
Valor de retorno | Exemplo:ATSE0, 0,0.0,0,0_ MODO:0,RT:0,bitrate: 0.0Mbps,gop:0,auditivo:0,Está bem |
Observação | comando de configuração, save when power is off. |
Get Encoder Command
Formato | ATGE_ |
Parâmetro | Não |
Usar | querying encoding parameters (sending end) |
Valor de retorno | Exemplo:ATGE_MODE:0, RT:0,bitrate:4.0Mbps,gop:10,auditivo:0,aes:0, Está bem |
Observação | Query command AES means the current encryption status: 0 disable; 1 habilitar |
Get Input Command
Formato | ATGI_ |
Parâmetro | Não |
Usar | query the current camera input parameters (transmissor) |
Valor de retorno | Exemplo:ATGI_input_size: 1080p, input_rate: 60fps, sensor_type: HDMI,Está bem |
Observação | comando de consulta |
Set Input Command
Formato | ATSI$(input_size),$(input_rate)_ Exemplo: ATSI1080,25_ |
Parâmetro | 1. Input resolution input_size: 0 deixe o sistema detectar; >0 specify input size 2. Input frame rate input_rate: 0 deixe o sistema detectar; > 0 specify input fps |
Usar | To specify the input resolution and frame rate to meet some special signal sources, or some special application needs (transmissor) |
Valor de retorno | Exemplo: ATSI1080,25_ Input_size:1080p,input_rate: 25fps, Está bem |
Observações | After 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
Formato | ATSO$(output_size),$(output_rate)_ Exemplo: ATSO720,30_ |
Parâmetro | 1. Transmissor: encoding output resolution output_size: 0 equal to input_size; >0 specify output size 2. recebedor: HDMI output resolution (720, 1080) 3. Transmissor: encoding output frame rate output_rate: 0 equal to input_rate; >0 specify output_rate (fps) 4. recebedor: HDMI output frame rate 720p supports frame rate (50, 60); 1080p supports frame rate (24, 25, 30, 50, 60) |
Usar | 1. Transmissor: Used to specify the encoding output resolution and frame rate to meet the requirements of certain applications for zooming and frame reduction 2. recebedor: used to configure the resolution and frame rate of HDMI output |
Valor de retorno | Exemplo: ATSO720,30_ output_size: 720p, output_rate: 30fps, Está bem |
Observações | 1. 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. |
Comando Definir fontes de entrada (mudar HDMI / entrada CVBS)
Formato | ATSU$(vin),$(ain)_ Exemplo: ATSU0,1_ |
Parâmetro | 1. Seleção de entrada de vídeo VIN: 0 deixe o sistema detectar; 1 forçar entrada CVBS; 2 forçar entrada HDMI/SDI 2. Seleção de entrada de áudio AIN: 0 deixe o sistema detectar; 1 forçar entrada analógica |
Usar | Usado para atender a requisitos específicos de aplicação (Exemplo: Vídeo de entrada HDMI/SDI, Áudio de entrada MIC) |
Valor de retorno | Exemplo: ATSU0,1_ ATSU0,1 OK |
Observação | comando de configuração, economia de desligamento. |
Get User Command
Formato | ATGU _ Exemplo: ATGU_ |
Parâmetro | Não |
Usar | To query user-specific configuration |
Valor de retorno | Exemplo: ATGU_ ATGU0,1 OK |
Observação | comando de consulta return parameter description please refer to the ATSU command |
Set Receiver Command
Formato | ATSR $(frequencia), $(bw ), $(llc), $(cvbs)_ Exemplo: ATSR320000,6000,0,0_ |
Parâmetro | 1. DR2C carrier frequency freq(KHz) 200000~860000(200860MHz MHz ~, 1passo KHz) 2. DR900 carrier center frequency freq(KHz) 200000~1600000(200MHz~1.6GHz, 1passo KHz) 3. DR2C channel bandwidth bw(KHz) 2000~8000(2MHz~8MHz, 1passo KHz) 4. DR900 channel bandwidth bw(KHz) 3200~8000(3.2MHz~8MHz, 1passo KHz) 5. Enhanced data reliability option llc: 0 disable; 1 habilitar (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 |
Usar | To set the receiver parameter |
Valor de retorno | exemplo: ATSR320000,6000,0,0_ ATSR320000,6000,0,0 OK |
Observação | comando de configuração, save when power is off. |
Get Receiver Command
Formato | ATGR_ |
Parâmetro | Não |
ATGR_ | the receiving end parameter |
Valor de retorno | Exemplo: ATGR_ ATGR320000,6000,0,aes:0,cvbs:0 Está bem |
Observação | 1. Query command 2. Aes parameter indicates the current encryption status: 0 disable;1 habilitar 3. CVBS parameter Indicates the current AV output standard: 0 pal;1 ntsc |
Get Bit Error Rate Command
Formato | ATGB_ |
Parâmetro | Não |
Usar | querying the bit error rate and signal strength of the dual antennas at the receiving end |
Valor de retorno | Exemplo: ATGB_ ATGB ber1:0.00% ber2:0.00% RSSI1 :54 RSSI2:53 Lock1:1 Lock2:1 Está bem |
Observações | 1. Query commands 2. Ber1 and ber2 respectively indicate the bit error rate of each antenna, variando de 0.0% para 100.0% 3. RSSI1 and RSSI2 respectively indicate the signal strength of each antenna, variando de 0 para 100 4. Lock1 and Lock2 respectively indicate the signal locking status of each antenna (1 Represents signal lock) |
Set Password Command
Formato | ATSP $(senha), $(senha)_ Exemplo: ATSP123456, 123456_ |
Parâmetro | senha da chave AES: 6-dígito senha (ASCII) senha da chave AES: 6-dígito senha (ASCII) (repeat it for confirmation) |
Usar | Usado para definir a chave AES do transceptor (transmissor e receptor) |
Valor de retorno | Exemplo: ATSP123456_ ATSP123456 OK |
Observação | 1. Quando a senha é tudo 0, AES encryption is turned off. 2. Set the command and save it after powering it off. |
Set Data Transfer Command
Formato | ATST$(taxa de transmissão), $( parity)_ Exemplo: ATST115200,0_ |
Parâmetro | 1. Baud rate baud rate: 1200、2400、4800、9600、19200、38400、57600、115200 2. Check Code: 0: Nenhum; 1: Chance; 2: Até |
Usar | Used to set the baud rate and parity bit of the serial port for data transparent transmission |
Valor de retorno | Exemplo: ATST115200,0_ ATST115200,0 OK |
Observações | Definir comando |
Get Data Transfer Command
Formato | ATGT_ |
Parâmetro | Não |
Usar | Used to query the baud rate and check code |
Valor de retorno | Exemplo: ATGT_ ATGT115200,0 OK |
Observações | Query command |
Set IP Address Command
Formato | ATSIP$(ip), $(ip)_ Exemplo: ATSIP192.168.1.215,192.168.1.215_ |
Parâmetros | Local IP address Local IP address (repita para confirmar) |
Usar | Used to set the receiver IP address |
Valor de retorno | Exemplo: ATSIP_192.168.1 .215,192.168.1.215_ ATSIP192.168.1.215 OK |
Observações | 1. After setting the IP address, the receiving end needs to be restarted to take effect. 2. Set the command and save it after powering it off. |
Get IP Address Command
Formato | ATGIP_ Exemplo: ATGIP_ |
Parâmetro | Não |
Usar | para consultar o endereço IP atual da extremidade receptora |
Valor de retorno | Exemplo: ATGIP_ ATGIP192.168.0.215 OK |
Observação | comando de consulta |
OSD Overlay Protocol
Formato | ATOSD$(idx), $(X), $(e), $(str)_ Exemplo:ATOSD0,40,20,height: 100m_ |
Parâmetro | 1. IDX index: 0~7 (supports OSD overlay for 8 areas) 2. X-coordinate: 0~1919 3. Y coordinate: 0~1079 4. str: the string to be displayed at the corresponding coordinates (the space symbol is used to clear the display) |
Usar | on the video screen.OSD information |
Valor de retorno | Não |
Observações | 1. The user specifies the x and y coordinates of the OSD display according to the maximum 1920×1080 pixels, and the system will correct the coordinates according to the actual display situation. 2. The ‘_’ character cannot be contained in the str parameter |
Set Gain To Adjust
Formato | ATSAD$(frequencia),$(adjust) _ Exemplo:ATSAD700000,2.5_ |
Parâmetro | wireless central working frequency: Frequencia(KHz) 200000~2700000(200MHz~2.7GHz, step: 1KHz) Adjust the value(dB): ATSD cmd will subtract this value to set the wireless gain |
Função | Specify and adjust the value for the wireless gain setting using by ATSD cmd |
Comentários | Exemplo: ATSAD700000,2.5_ freq:700000,adjust:2.50 Está bem |
Comentários | Setting command is still valid when stopping power or resetting. |
Get Gain To Adjust
Formato | ATGAD[$(frequencia)]_ Exemplo:ATGAD700000_ |
Parâmetro | wireless central working frequency: Frequencia(KHz) 200000~2700000(200MHz~2.7GHz, step: 1KHz) When no parameter provides, it will list all the freq that have adjusted value. |
Função | Inquiry adjust the value for wireless gain setting using ATSD cmd |
Comentários | Exemplo: ATGAD700000_ freq:700000,adjust:2.50 OK ATGAD_ freq:700000 750000 Está bem |
Comentários | Inquiry command. |
Serial Port Utility software download
https://www.alithon.com/downloads
Perguntas frequentes
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 a 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 (Ganho) 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 set – B bandwidth (kHz) and E bit rate (Mbps). When I set E, the new value does not apply. Então. the E setting is only for monitoring of available bitrate? if I wish to change the E (Bitrate) I have to change only B (largura de banda)? Am I right?
It is not recommended to modify the video bit rate ‘E’ directly, because if the output video bit rate is greater than the wireless air interface rate, the system will not work normally.
Por padrão, the internal video bit rate ‘E’ will be set to 0 for automatic. Customers only need to modify ‘B’ to 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.
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