Encoder Modulator Decoder Demodulator模塊參數配置說明 COFDM AT命令
Encoder Modulator Decoder Demodulator模塊參數配置說明 COFDM AT命令
Download the Encoder Modulator Decoder Demodulator Module Parameter Configuration Instructions below if you need a PDF file.
Update Record:
| 版 | 日期 | 描述 |
| 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 “在” and ends with an underscore “_”. Each AT command has several or no parameters, and each AT command has a return value. 詳情, please refer to the introduction of the following commands.
Users can configure the parameters of the module through the configuration serial port (TTL電平, 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 文本, 例如:
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, 交通運輸管理協會, ATSE, ATSI, ATSO, 特勤局, 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, 特勤局, ATSP, ATST, ATSU, ATSIP |
| Power-off Not Saving Commands | ATSG, 交通運輸管理協會, ATOSD |
According to the configuration transmitter or receiver, the classification is as follows:
| Sender Configuration Commands | ATDR, ATSD, ATGD, ATSG, 交通運輸管理協會, ATSE, ATGE, ATSI, ATGI, ATSO, ATSP, ATST, ATGT, ATSU, ATGU, ATOSD |
| Receiver Configuration Commands | ATDR, 特勤局, ATGR, ATSP, ATST, ATGT, ATGB, ATSIP, ATGIP |
Command Details
Ping Command
| 格式 | ATDR_ |
| 參數 | 沒有 |
| 使用 | for the integrated system to check whether the serial port is connected and identify the connected modules. |
| 返回值 | RCB returns the “device profile” string SUE1 returns “ATDRSUE1 OK” string SHD1 returns “ATDRSHD1 OK” string |
| 備註 | 查詢命令 |
Set Device Command
| 格式 | ATSD $(mimo), $(gi), $(可配置的射頻輸出功率), $ (constellation), $(頻率(千赫)), $(bw(千赫)), $(tx1_gain), $(tx2_gain)_ 例子: ATSD0,1,0,0,800000,8000,86.0,86.0_ |
| 參數 | One Antenna/Dual antenna mimo: 0 mimo disable; 1 mimo enable Guard Interval GI: 0 1/32; 1 1/16; 2 1/8; 3 1/4 Convolution Code Rate: 0 1/2; 1 2 /3; 2 3/4; 3 5/6; 4 7/8; 星座: 0 QPSK; 1 QAM16; 2 QAM64; RCB Carrier Center Frequency(千赫) 200000~2700000(200MHz~2.7GHz, 1千赫步) RC900 Carrier center Frequency(千赫) 750000~930000(750兆赫〜930MHz, 1千赫步) RCB Channel bandwidth bw(千赫) 2000~8000(2兆赫~8兆赫, 1千赫步) RCB Channel bandwidth bw(千赫) 2000~8000 (2兆赫~8兆赫, 1千赫步) Transmitting antenna 1 gain tx1_gain 0.0~89.75dB, 0.25dB stepping Transmitting antenna 2 gain tx2_gain 0.0~89.75dB, 0.25dB stepping |
| Return Value | 如:ATSD0,1,0,0,800000,8000,86.0,86.0_ SISO,GI: 1/16, CR:1/2, MOD: QPSK, 頻率:800000千赫,bw:8000千赫,tx1_gain:86.000000 tx2_gain:86.000000 好 |
| 注意 | 設置命令, 斷電保存. Different Bandwidths, 保護間隔, Convolution code rates, Data rate calculation formulas corresponding to constellations Air interface rate Rate(可配置的射頻輸出功率) 可配置的射頻輸出功率 (帶寬(兆赫) * 8.0/7.0) / (1+GI) * 1512/2048*可配置的射頻輸出功率(可配置的射頻輸出功率) * 可配置的射頻輸出功率 * 188/204. Taking 8MHz bandwidth as an example, different guard intervals, convolution code rates, data rates corresponding to constellations and required receiving signal-to-noise ratios  |
小號et Gain Command
| 格式 | ATSG$( tx1_gain),$( tx1_gain)_ 例子: ATSG85.0,85.0_ |
| 參數 | tx1_gain: 發射機 1 獲得 tx2_gain: 發射機 2 獲得 |
| 使用 | To dynamically adjust the output power. If the signal SNR/RSSI of the receiver is high, the output power can be reduced through the remote control link. When the SNR/RSSI of the end signal is low, increase the output power (發射機) |
| Return Value, | 例子: ATSG85.0,85.0_set gain 85.000000 85.000000 好 |
| 備註 | setting command, power off will not save. |
Set Modulation Mode command
| 格式 | ATSM$(gi), $(可配置的射頻輸出功率), $(constellation)_ 例子: ATSM1,1,2_ |
| 參數 | Gard interval GI: 0 1/32; 1 1/16; 2 1/8; 3 1 /4; Convolution code rate: 0 1/2; 1 2/3; 2 3/4; 3 5/6; 4 7/8; 星座: 0 QPSK; 1 QAM16; 2 QAM64 |
| 使用 | Dynamically adjust the air interface rate, the air interface rate can be increased when the distance is short, and the air interface rate can be reduced when the distance is long (發射機) |
| Return Value | 例子:ATSM1,1,2_GI:1/16, CR:2/3, MOD: QAM64, 好 |
| 備註 | setting command, power off will not save. |
Get Device Status Command
| 格式 | ATGD_ |
| 參數 | 沒有 |
| 使用 | query the current number of transmit antennas, 保護間隔, convolution code rate, number of constellations, transmit frequency, 帶寬, gain parameters (發射機) |
| Return Value | 例子: ATGD_ SISO, GI:1 /16, CR: 1/2, MOD: QPSK, 頻率: 800000千赫, bw: 8000千赫, tx1_gain: 86.000000 tx2_gain: 86.000000 好 |
| 備註 | 查詢命令 |
Set Encoder Command
| 格式 | ATSE$(llc),$(rt),$(bitrate) ,$(gop),$(音頻)_ 例子: ATSE0,0,0.0,0,0_ |
| 參數 | 1. Enhanced data reliability option llc: 0 disable; 1 使能夠 (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. 比特率: 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 使能夠 |
| 使用 | Used to set encoding parameters (發射機) |
| Return Value | 例子:ATSE0, 0,0.0,0,0_ 模式:0,RT:0,bitrate: 0.0Mbps的,gop:0,音頻:0,好 |
| 備註 | setting command, save when power is off. |
Get Encoder Command
| 格式 | ATGE_ |
| 參數 | 沒有 |
| 使用 | querying encoding parameters (sending end) |
| Return Value | 例子:ATGE_MODE:0, RT:0,bitrate:4.0Mbps的,gop:10,音頻:0,aes:0, 好 |
| 備註 | Query command AES means the current encryption status: 0 disable; 1 使能夠 |
Get Input Command
| 格式 | ATGI_ |
| 參數 | 沒有 |
| 使用 | query the current camera input parameters (發射機) |
| Return Value | 例子:ATGI_input_size: 1080p, input_rate: 60FPS, sensor_type: HDMI,好 |
| 備註 | 查詢命令 |
Set Input Command
| 格式 | ATSI$(input_size),$(input_rate)_ 例子: ATSI1080,25_ |
| 參數 | 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 |
| 使用 | To specify the input resolution and frame rate to meet some special signal sources, or some special application needs (發射機) |
| Return Value | 例子: ATSI1080,25_ Input_size:1080p,input_rate: 25FPS, 好 |
| 備註 | 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
| 格式 | ATSO$(output_size),$(output_rate)_ 例子: ATSO720,30_ |
| 參數 | 1. 發射機: encoding output resolution output_size: 0 equal to input_size; >0 specify output size 2. 接收器: HDMI output resolution (720, 1080) 3. 發射機: encoding output frame rate output_rate: 0 equal to input_rate; >0 specify output_rate (FPS) 4. 接收器: HDMI output frame rate 720p supports frame rate (50, 60); 1080p supports frame rate (24, 25, 30, 50, 60) |
| 使用 | 1. 發射機: Used to specify the encoding output resolution and frame rate to meet the requirements of certain applications for zooming and frame reduction 2. 接收器: used to configure the resolution and frame rate of HDMI output |
| Return Value | 例子: ATSO720,30_ output_size: 720p, output_rate: 30FPS, 好 |
| 備註 | 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 / CVBS輸入)
| 格式 | ATSU$(vin),$(艾因)_ 例子: ATSU0,1 _ |
| 參數 | 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 |
| 使用 | Used to meet specific application requirements (例子: HDMI/SDI input video, MIC input audio) |
| Return Value | 例子: ATSU0,1_ ATSU0,1 OK |
| 備註 | setting command, power-off save. |
Get User Command
| 格式 | ATGU _ 例子: ATGU_ |
| 參數 | 沒有 |
| 使用 | To query user-specific configuration |
| Return Value | 例子: ATGU_ ATGU0,1 OK |
| 備註 | 查詢命令 return parameter description please refer to the ATSU command |
Set Receiver Command
| 格式 | 特勤局 $(頻率), $(bw ), $(llc), $(cvbs)_ 例子: ATSR320000,6000,0,0_ |
| 參數 | 1. DR2C carrier frequency freq(千赫) 200000~860000(200兆赫〜860MHz的, 1千赫步) 2. DR900 carrier center frequency freq(千赫) 200000~1600000(200MHz~1.6GHz, 1千赫步) 3. DR2C channel bandwidth bw(千赫) 2000~8000(2兆赫~8兆赫, 1千赫步) 4. DR900 channel bandwidth bw(千赫) 3200~8000(3.2兆赫~8兆赫, 1千赫步) 5. Enhanced data reliability option llc: 0 disable; 1 使能夠 (it is required that the transmitter should also enable this option at the same time, and use it in pairs. Since more redundant data is added to enhance reliability, the video bit rate of the transmitter should be set to when this option is turned off half of) 6. AV output system cvbs: 0 pal; 1 ntsc |
| 使用 | To set the receiver parameter |
| Return Value | example: ATSR320000,6000,0,0_ ATSR320000,6000,0,0 OK |
| 備註 | setting command, save when power is off. |
Get Receiver Command
| 格式 | ATGR_ |
| 參數 | 沒有 |
| ATGR_ | the receiving end parameter |
| Return Value | 例子: ATGR_ ATGR320000,6000,0,aes:0,cvbs:0 好 |
| 備註 | 1. Query command 2. Aes parameter indicates the current encryption status: 0 disable;1 使能夠 3. CVBS parameter Indicates the current AV output standard: 0 pal;1 ntsc |
Get Bit Error Rate Command
| 格式 | ATGB_ |
| 參數 | 沒有 |
| 使用 | querying the bit error rate and signal strength of the dual antennas at the receiving end |
| Return Value | 例子: ATGB_ ATGB ber1:0.00% BER2:0.00% RSSI1 :54 RSSI2:53 Lock1:1 Lock2:1 好 |
| 備註 | 1. Query commands 2. Ber1 and ber2 respectively indicate the bit error rate of each antenna, ranging from 0.0% 至 100.0% 3. RSSI1 and RSSI2 respectively indicate the signal strength of each antenna, ranging from 0 至 100 4. Lock1 and Lock2 respectively indicate the signal locking status of each antenna (1 Represents signal lock) |
Set Password Command
| 格式 | ATSP$(密碼), $(密碼)_ 例子: ATSP123456, 123456_ |
| 參數 | AES 密鑰密碼: 6-digit password (ASCII) AES 密鑰密碼: 6-digit password (ASCII) (repeat it for confirmation) |
| 使用 | 用於設置收發器的 AES 密鑰 (發射器和接收器) |
| Return Value | 例子: ATSP123456_ ATSP123456 好的 |
| 備註 | 1. 當密碼全部 0, AES encryption is turned off. 2. Set the command and save it after powering it off. |
Set Data Transfer Command
| 格式 | ATST$(波特率), $( parity)_ 例子: ATST115200,0_ |
| 參數 | 1. Baud rate baud rate: 1200、2400、4800、9600、19200、38400、57600、115200 2. Check Code: 0: 沒有任何; 1: Odd; 2: Even |
| 使用 | Used to set the baud rate and parity bit of the serial port for data transparent transmission |
| Return Value | 例子: ATST115200,0_ ATST115200,0 OK |
| 備註 | 設置命令 |
Get Data Transfer Command
| 格式 | ATGT_ |
| 參數 | 沒有 |
| 使用 | Used to query the baud rate and check code |
| Return Value | 例子: ATGT_ ATGT115200,0 OK |
| 備註 | Query command |
Set IP Address Command
| 格式 | ATSIP$(ip), $(ip)_ 例子: ATSIP192.168.1.215,192.168.1.215_ |
| 參數 | Local IP address Local IP address (重複確認) |
| 使用 | Used to set the receiver IP address |
| Return Value | 例子: ATSIP_192.168.1 .215,192.168.1.215_ ATSIP192.168.1.215 OK |
| 備註 | 1. After setting the IP address, the receiving end needs to be restarted to take effect. 2. Set the command and save it after powering it off. |
Get IP Address Command
| 格式 | ATGIP_ 例子: ATGIP_ |
| 參數 | 沒有 |
| 使用 | 查詢當前接收端IP地址 |
| 返回值 | 例子: ATGIP_ ATGIP192.168.0.215 正常 |
| 備註 | 查詢命令 |
OSD Overlay Protocol
| 格式 | ATOSD$(idx), $(X), $(y), $(str)_ 例子:ATOSD0,40,20,height: 100m_ |
| 參數 | 1. IDX index: 0~7 (supports OSD overlay for 8 areas) 2. X-coordinate: 0~1919 3. Y coordinate: 0~1079 4. str: the string to be displayed at the corresponding coordinates (the space symbol is used to clear the display) |
| 使用 | on the video screen.OSD information |
| 返回值 | 沒有 |
| 備註 | 1. The user specifies the x and y coordinates of the OSD display according to the maximum 1920×1080 像素, and the system will correct the coordinates according to the actual display situation. 2. The ‘_’ character cannot be contained in the str parameter |
Set Gain To Adjust
| 格式 | ATSAD$(頻率),$(adjust) _ 例子:ATSAD700000,2.5_ |
| 參數 | wireless central working frequency： 頻率(千赫) 200000~2700000(200MHz~2.7GHz, step: 1千赫) Adjust the value(分貝): ATSD cmd will subtract this value to set the wireless gain |
| 功能 | Specify and adjust the value for the wireless gain setting using by ATSD cmd |
| 反饋 | 例子: ATSAD700000,2.5_ freq:700000,adjust:2.50 好 |
| 註釋 | Setting command is still valid when stopping power or resetting. |
Get Gain To Adjust
| 格式 | ATGAD[$(頻率)]_ 例子:ATGAD700000_ |
| 參數 | wireless central working frequency： 頻率(千赫) 200000~2700000(200MHz~2.7GHz, step: 1千赫) When no parameter provides, it will list all the freq that have adjusted value. |
| 功能 | Inquiry adjust the value for wireless gain setting using ATSD cmd |
| 反饋 | 例子: ATGAD700000_ freq:700000,adjust:2.50 OK ATGAD_ freq:700000 750000 好 |
| 註釋 | Inquiry command. |
Serial Port Utility software download
HTTPS://www.alithon.com/downloads
常問問題
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 該 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 (獲得) 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 (千赫) and E bit rate (Mbps的). When I set E, the new value does not apply. 所以. the E setting is only for monitoring of available bitrate? if I wish to change the E (比特率) I have to change only B (帶寬)? 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.
預設情況下, 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.
COFDM 調製器 解調器模塊 編碼器 解碼器 HDMI CVBS AV 輸入 AES 256 全高清射頻流媒體
COFDM 調製器 解調器模塊 編碼器 解碼器 HDMI CVBS AV 輸入 AES 256 全高清射頻流媒體
目錄
另一個側面圖
COFDM編碼器模塊, CVBS / HDMI輸入, IP輸出
COFDM編碼器模塊優勢:
- 超低延遲H.265/H.264音視頻編碼最大支持1080P@60實時視頻採集和編碼
- HDMI或AV音視頻輸入, 編碼後, 以太網端口輸出或輸出到無線模塊, 視頻編碼碼率可動態配置
- 支持音頻輸入和音頻解碼輸出
- 支持兩個視頻 (HDMI + AV) 同時輸入編碼 (選項, 默認為 HDMI 或 AV 編碼, 從兩個輸入源中選擇一個). )
- 網頁界面 要么 串口UART AT命令 用於配置管理
COFDM發射機模組
COFDM調製解調器數據表下載
TX RX 板的最新版本
TX: V6.5.6p
RX: 4.1.2p
常見問題
- 問題一: 你能告訴我這個組件的部件號嗎, 我們嘗試找到本地並檢查. 回答 1: 這是一個名為LOH32PN2R2NNC的電感.
- 建議檢查點: 如果單板供電電流良好但無射頻輸出, 也許下面的組件 TC1-1-13MX+ 一般損壞.
- 為了避免在運輸過程中損壞本設備 (設備本身比較高), 我們在發貨時為該設備訂購了紅膠保護.
- 工程師還建議您檢查排線是否鬆動或接觸不良.
- 請嘗試更換連接兩板的FPC排線
- We can provide spare parts if you're sure which one.
3. 題, 如果我們的相機質量足夠好 4 MHz和 8 MHz帶寬. 在這種情況下, 如果客戶選擇 4 MHz或 8 兆赫?
回答: 我們的單向 COFDM 貨件默認使用 4Mz 無線帶寬, 對應3.12Mbps的視頻碼率, 1080p 就夠了; 如果在相同條件下改為8MHz無線帶寬, 視頻比特率翻倍至 6.24Mbps. 所有客戶都可以選擇無線帶寬 4MHz 和 8MHz, 甚至6MHz也可以考慮.
4. 題: 從接收靈敏度視圖來看，哪個對於此 tx+rx 集更好?
回答: 對於無線鏈接, 可以簡單的認為在較低的無線帶寬下接收靈敏度會更高. 從接收靈敏度來看, 4兆赫>6兆赫>8兆赫
HDMI 1.4
當然
請檢查以下鏈接
COFDM Relay Repeater module for drone UAV wireless video transmitter and receiver Vcan1870
單通道接收靈敏度:
-97+/-1DBM 在 QPSK 8MHz,
-98+/-1DBM 在 QPSK 6MHZ,
雙天線接收靈敏度提升3dbm
接收器默認固件支持RTSP播放器, 一些客戶更喜歡UDP播放器, 我們也可以提供, then RTSP player doesn't support. （RTSP和UDP兩種固件只能選其一）
請到以下鏈接下載.
Splayer_v4.2_2020.6.6
https://drive.google.com/file/d/1ihzUhfnx2Wo3zLO8UAs1aUQeLswonJD-/view?usp=sharing
Splayer_v4.3_2022.10.22
https://drive.google.com/file/d/1PQc-LZ55qGnjeMsjkHYSloHfY3NEUsGH/view?usp=drive_link
當然, 請檢查下面的圖片.
如何透過UART AT指令切換HDMI或CVBS視訊輸入?
如何升級COFDM視訊接收機
如何升級COFDM無人機視訊編碼調變器板
成為第一個檢討“COFDM 調製器 解調器模塊 編碼器 解碼器 HDMI CVBS AV 輸入 AES 256 全高清射頻流媒體”
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