Encoder Modulator Decoder Demodulator Module Parameter Configuration Instructions COFDM AT Command

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Update Record:

Version	Date	Описание
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 level, 3.3Вуйсавырныш) 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 text, for example:

Сommand 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

Формат	ATDR_
Параметр	Уке
Кучылтмаш	for the integrated system to check whether the serial port is connected and identify the connected modules.
Return value	RCB returns the “device profile” string SUE1 returns “ATDRSUE1 OK” string SHD1 returns “ATDRSHD1 OK” string
Замечаний	query command

Set Device Command

Формат	ATSD $(mimo), $(gi), $(code_rate), $ (constellation), $(freq(KHz)), $(bw(KHz)), $(tx1_gain), $(tx2_gain)_ Example: ATSD0,1,0,0,800000,8000,86.0,86.0_
Параметр	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; Созвездие: 0 ФМ; 1 QAM16; 2 QAM64; RCB Carrier Center Frequency(kHz) 200000~2700000(200MHz~2.7GHz, 1KHz step) RC900 Carrier center Frequency(kHz) 750000~930000(750MHz~930MHz, 1KHz step) RCB Channel bandwidth bw(KHz) 2000~8000(2MHz~8MHz, 1KHz step) RCB Channel bandwidth bw(KHz) 2000~8000 (2MHz~8MHz, 1KHz step) Transmitting antenna 1 gain tx1_gain 0.0~89.75dB, 0.25dB stepping Transmitting antenna 2 gain tx2_gain 0.0~89.75dB, 0.25dB stepping
Return Value	мут:ATSD0,1,0,0,800000,8000,86.0,86.0_ SISO,GI: 1/16, CR:1/2, MOD: ФМ, freq:800000KHz,bw:8000KHz,tx1_gain:86.000000 tx2_gain:86.000000 ЭТНОГРАФИЯ
Кылвер-влак	Set command, save when power off. Different Bandwidths, Guard intervals, Convolution code rates, Data rate calculation formulas corresponding to constellations Air interface rate Rate(MBps) = (Официальный(МГц) * 8.0/7.0) / (1+GI) * 1512/2048*log2(constellation point) * code_rate * 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

Формат	ATSG$( tx1_gain),$( tx1_gain)_ Example: ATSG85.0,85.0_
Параметр	tx1_gain: Transmitter 1 gain tx2_gain: Transmitter 2 gain
Кучылтмаш	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 (передатчик)
Return Value,	Example: ATSG85.0,85.0_set gain 85.000000 85.000000 ЭТНОГРАФИЯ
Замечаний	setting command, power off will not save.

Set Modulation Mode command

Формат	ATSM$(gi), $(code_rate), $(constellation)_ Example: ATSM1,1,2_
Параметр	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; Созвездие: 0 ФМ; 1 QAM16; 2 QAM64
Кучылтмаш	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 (передатчик)
Return Value	Example:ATSM1,1,2_GI:1/16, CR:2/3, MOD: QAM64, ЭТНОГРАФИЯ
Замечаний	setting command, power off will not save.

Гet Device Status Command

Формат	ATGD_
Параметр	Уке
Кучылтмаш	query the current number of transmit antennas, интервал ӱзгар-влак , convolution code rate, number of constellations, transmit frequency, bandwidth, gain parameters (передатчик)
Return Value	Example: ATGD_ SISO, GI:1 /16, CR: 1/2, MOD: ФМ, freq: 800000KHz, bw: 8000KHz, tx1_gain: 86.000000 tx2_gain: 86.000000 ЭТНОГРАФИЯ
Замечаний	query command

Set Encoder Command

Формат	ATSE$(llc),$(rt),$(bitrate) ,$(gop),$(audio)_ Example: ATSE0,0,0.0,0,0_
Параметр	1. 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. 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 enable
Кучылтмаш	Used to set encoding parameters (Transmitter)
Return Value	Example:ATSE0, 0,0.0,0,0_ Режим:0,RT:0,bitrate: 0.0Мбит / с,gop:0,audio:0,ЭТНОГРАФИЯ
Замечаний	setting command, save when power is off.

Get Encoder Command

Формат	ATGE_
Параметр	Уке
Кучылтмаш	querying encoding parameters (sending end)
Return Value	Example:ATGE_MODE:0, RT:0,bitrate:4.0Мбит / с,gop:10,audio:0,aes:0, ЭТНОГРАФИЯ
Замечаний	Query command AES means the current encryption status: 0 disable; 1 enable

Get Input Command

Формат	ATGI_
Параметр	Уке
Кучылтмаш	query the current camera input parameters (передатчик)
Return Value	Example:ATGI_input_size: 1080п, input_rate: 60фпс, sensor_type: hdmi,ЭТНОГРАФИЯ
Замечаний	query command

Set Input Command

Формат	ATSI$(input_size),$(input_rate)_ Example: ATSI1080,25_
Параметр	1. 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
Кучылтмаш	To specify the input resolution and frame rate to meet some special signal sources, or some special application needs (передатчик)
Return Value	Example: ATSI1080,25_ Input_size:1080п,input_rate: 25фпс, ЭТНОГРАФИЯ
Remarks	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

Формат	ATSO$(output_size),$(output_rate)_ Example: ATSO720,30_
Параметр	1. Transmitter: encoding output resolution output_size: 0 equal to input_size; >0 specify output size 2. Ресивер: HDMI output resolution (720, 1080) 3. Transmitter: encoding output frame rate output_rate: 0 equal to input_rate; >0 specify output_rate (фпс) 4. Ресивер: HDMI output frame rate 720p supports frame rate (50, 60); 1080p supports frame rate (24, 25, 30, 50, 60)
Кучылтмаш	1. Transmitter: Used to specify the encoding output resolution and frame rate to meet the requirements of certain applications for zooming and frame reduction 2. Ресивер: used to configure the resolution and frame rate of HDMI output
Return Value	Example: ATSO720,30_ output_size: 720п, output_rate: 30фпс, ЭТНОГРАФИЯ
Remarks	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.

Set Input Sources Command (switch HDMI / Сигнал-влак пурат cvbs)

Формат	ATSU$(vin),$(ain)_ Example: ATSU0,1 _
Параметр	1. 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
Кучылтмаш	Used to meet specific application requirements (Example: HDMI/SDI input video, MIC input audio)
Return Value	Example: ATSU0,1_ ATSU0,1 OK
Замечаний	setting command, power-off save.

Get User Command

Формат	ATGU _ Example: ATGU_
Параметр	Уке
Кучылтмаш	To query user-specific configuration
Return Value	Example: ATGU_ ATGU0,1 OK
Замечаний	query command return parameter description please refer to the ATSU command

Set Receiver Command

Формат	ATSR $(freq), $(bw ), $(llc), $(cvbs)_ Example: ATSR320000,6000,0,0_
Параметр	1. DR2C carrier frequency freq(KHz) 200000~860000(200MHz~860MHz, 1KHz step) 2. DR900 carrier center frequency freq(KHz) 200000~1600000(200MHz~1.6GHz, 1KHz step) 3. DR2C channel bandwidth bw(KHz) 2000~8000(2MHz~8MHz, 1KHz step) 4. DR900 channel bandwidth bw(KHz) 3200~8000(3.2MHz~8MHz, 1KHz step) 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
Кучылтмаш	To set the receiver parameter
Return Value	example: ATSR320000,6000,0,0_ ATSR320000,6000,0,0 OK
Замечаний	setting command, save when power is off.

Get Receiver Command

Формат	ATGR_
Параметр	Уке
ATGR_	the receiving end parameter
Return Value	Example: ATGR_ ATGR320000,6000,0,aes:0,cvbs:0 ЭТНОГРАФИЯ
Замечаний	1. 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

Формат	ATGB_
Параметр	Уке
Кучылтмаш	querying the bit error rate and signal strength of the dual antennas at the receiving end
Return Value	Example: ATGB_ ATGB ber1:0.00% ber2:0.00% RSSI1 :54 RSSI2:53 Lock1:1 Lock2:1 ЭТНОГРАФИЯ
Remarks	1. Query commands 2. Ber1 and ber2 respectively indicate the bit error rate of each antenna, ranging from 0.0% вуйсавырныш 100.0% 3. RSSI1 and RSSI2 respectively indicate the signal strength of each antenna, ranging from 0 вуйсавырныш 100 4. Lock1 and Lock2 respectively indicate the signal locking status of each antenna (1 Represents signal lock)

Set Password Command

Формат	ATSP$(password), $(password)_ Example: ATSP123456, 123456_
Параметр	AES key password: 6-digit password (ASCII) AES key password: 6-digit password (ASCII) (repeat it for confirmation)
Кучылтмаш	Used to set the AES key of the transceiver (передатчик да приёмникым)
Return Value	Example: ATSP123456_ ATSP123456 OK
Замечаний	1. 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

Формат	ATST$(baud rate), $( parity)_ Example: ATST115200,0_
Параметр	1. Baud rate baud rate: 1200、2400、4800、9600、19200、38400、57600、115200 2. Check Code: 0: None; 1: Odd; 2: Even
Кучылтмаш	Used to set the baud rate and parity bit of the serial port for data transparent transmission
Return Value	Example: ATST115200,0_ ATST115200,0 OK
Remarks	Set command

Get Data Transfer Command

Формат	ATGT_
Параметр	Уке
Кучылтмаш	Used to query the baud rate and check code
Return Value	Example: ATGT_ ATGT115200,0 OK
Remarks	Query command

Set IP Address Command

Формат	ATSIP$(ip), $(ip)_ Example: ATSIP192.168.1.215,192.168.1.215_
Parameters	Local IP address Local IP address (repeat to confirm)
Кучылтмаш	Used to set the receiver IP address
Return Value	Example: ATSIP_192.168.1 .215,192.168.1.215_ ATSIP192.168.1.215 OK
Remarks	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

Формат	ATGIP_ Example: ATGIP_
Параметр	Уке
Кучылтмаш	to query the current IP address of the receiving end
Return value	Example: ATGIP_ ATGIP192.168.0.215 OK
Замечаний	query command

OSD Overlay Protocol

Формат	ATOSD$(idx), $(х), $(y), $(str)_ Example:ATOSD0,40,20,height: 100m_
Параметр	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)
Кучылтмаш	on the video screen.OSD information
Return value	Уке
Remarks	1. The user specifies the x and y coordinates of the OSD display according to the maximum 1920×1080 пиксел, 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

Формат	ATSAD$(freq),$(adjust) _ Example:ATSAD700000,2.5_
Параметр	wireless central working frequency：   Freq(KHz) 200000~2700000(200MHz~2.7GHz, step: 1KHz) Adjust the value(дБ):       ATSD cmd will subtract this value to set the wireless gain
Функций	Specify and adjust the value for the wireless gain setting using by ATSD cmd
Feedback	Example: ATSAD700000,2.5_ freq:700000,adjust:2.50 ЭТНОГРАФИЯ
Comments	Setting command is still valid when stopping power or resetting.

Get Gain To Adjust

Формат	ATGAD[$(freq)]_ Example:ATGAD700000_
Параметр	wireless central working frequency：   Freq(KHz) 200000~2700000(200MHz~2.7GHz, step: 1KHz) When no parameter provides, it will list all the freq that have adjusted value.
Функций	Inquiry adjust the value for wireless gain setting using ATSD cmd
Feedback	Example: ATGAD700000_ freq:700000,adjust:2.50 OK ATGAD_ freq:700000 750000 ЭТНОГРАФИЯ
Comments	Inquiry command.

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