Encoder Modulator Decoder Demodulator Module Parameter Configuration Instructions COFDM AT Command
Encoder Modulator Decoder Demodulator Module Parameter Configuration Instructions COFDM AT Command
Download the Encoder Modulator Decoder Demodulator Module Parameter Configuration Instructions below if you need a PDF file.
Update Record:
| 版本。 | 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 “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 級別, 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 發短信, 例如:
command Classification
The AT commands for configuring COFDM module parameters are mainly divided into the following two categories:
| Query Commands | ATDR技術, ATGD型, ATGE, ATGI , ATGR型, ATGT, ATGB, ATGU, ATGIP |
| Setting Commands | ATSD類苯丙胺類藥物, ATSG, ATSM, ATSE, ATSI, ATSO, ATSR嘅, 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類苯丙胺類藥物, ATSE, ATSI, ATSO, ATSR嘅, 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技術, ATSD類苯丙胺類藥物, ATGD型, ATSG, ATSM, ATSE, ATGE, ATSI, ATGI, ATSO, ATSP, ATST, ATGT, ATSU, ATGU, ATOSD |
| Receiver Configuration Commands | ATDR技術, ATSR嘅, ATGR型, ATSP, ATST, ATGT, ATGB, ATSIP, ATGIP |
Command Details
Ping Command
| 格式 | ATDR_ |
| 參數 | 唔 |
| 使用 | 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 |
| 备注 | query command |
Set Device Command
| 格式 | ATSD類苯丙胺類藥物 $(mimo), $(gi), $(code_rate), $ (星座), $(頻率(千赫)), $(bw(千赫)), $(tx1_gain), $(tx2_gain)_ Example: ATSD0,1,0,0,800000,8000,86.0,86.0_ |
| 參數 | One Antenna/Dual antenna mimo: 0 mimo disable; 1 mimo enable Guard Interval GI: 0 1/32; 1 1/16; 2 1/8; 3 1/4 Convolution Code Rate: 0 1/2; 1 2 /3; 2 3/4; 3 5/6; 4 7/8; 星座: 0 QPSK; 1 QAM16系列; 2 QAM64型; RCB Carrier Center Frequency(千赫) 200000~2700000(200MHz~2.7GHz, 1KHz步進。) RC900 Carrier center Frequency(千赫) 750000~930000(750MHz~930MHz, 1KHz步進。) RCB Channel bandwidth bw(千赫) 2000~8000(2MHz~8MHz, 1KHz步進。) RCB Channel bandwidth bw(千赫) 2000~8000 (2MHz~8MHz, 1KHz步進。) Transmitting antenna 1 gain tx1_gain 0.0~89.75dB, 0.25dB stepping Transmitting antenna 2 gain tx2_gain 0.0~89.75dB, 0.25dB stepping |
| Return Value | 如:ATSD0,1,0,0,800000,8000,86.0,86.0_ SISO,地理標誌: 1/16, 鉻:1/2, MOD: QPSK, 頻率:800000千赫,bw:8000千赫,tx1_gain:86.000000 tx2_gain:86.000000 好呀！ |
| 注意 | Set command, save when power off. Different Bandwidths, 防護間隔, Convolution code rates, Data rate calculation formulas corresponding to constellations Air interface rate Rate(兆巴) = (帶寬(MHz) * 8.0/7.0) / (1+地理標誌) * 1512/2048*日誌2(星座點) * code_rate * 188/204. Taking 8MHz bandwidth as an example, different guard intervals, convolution code rates, data rates corresponding to constellations and required receiving signal-to-noise ratios  |
Set Gain Command
| 格式 | ATSG$( tx1_gain),$( tx1_gain)_ Example: ATSG85.0,85.0_ |
| 參數 | tx1_gain: 發射機 1 獲得 tx2_gain: 發射機 2 獲得 |
| 使用 | To dynamically adjust the output power. If the signal SNR/RSSI of the receiver is high, the output power can be reduced through the remote control link. When the SNR/RSSI of the end signal is low, increase the output power (器) |
| Return Value, | Example: ATSG85.0,85.0_set gain 85.000000 85.000000 好呀！ |
| 备注 | setting command, power off will not save. |
Set Modulation Mode command
| 格式 | ATSM$(gi), $(code_rate), $(星座)_ Example: ATSM1,1,2_ |
| 參數 | Gard interval GI: 0 1/32; 1 1/16; 2 1/8; 3 1 /4; Convolution code rate: 0 1/2; 1 2/3; 2 3/4; 3 5/6; 4 7/8; 星座: 0 QPSK; 1 QAM16系列; 2 QAM64型 |
| 使用 | Dynamically adjust the air interface rate, the air interface rate can be increased when the distance is short, and the air interface rate can be reduced when the distance is long (器) |
| Return Value | Example:ATSM1,1,2_GI:1/16, 鉻:2/3, MOD: QAM64型, 好呀！ |
| 备注 | setting command, power off will not save. |
get Device Status Command
| 格式 | ATGD_ |
| 參數 | 唔 |
| 使用 | query the current number of transmit antennas, 保護間隔, convolution code rate, number of constellations, transmit frequency, 帶寬, gain parameters (器) |
| Return Value | Example: ATGD_ SISO, 地理標誌:1 /16, 鉻: 1/2, MOD: QPSK, 頻率: 800000千赫, bw: 8000千赫, tx1_gain: 86.000000 tx2_gain: 86.000000 好呀！ |
| 备注 | query command |
Set Encoder Command
| 格式 | ATSE$(llc),$(rt),$(bitrate) ,$(gop),$(音頻)_ Example: ATSE0,0,0.0,0,0_ |
| 參數 | 1. Enhanced data reliability option llc: 0 disable; 1 使 (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. 比特拉特: 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 |
| 使用 | Used to set encoding parameters (發射機) |
| Return Value | Example:ATSE0, 0,0.0,0,0_ 时尚:0,RT:0,bitrate: 0.0Mbps,gop:0,音頻:0,好呀！ |
| 备注 | setting command, save when power is off. |
Get Encoder Command
| 格式 | ATGE_ |
| 參數 | 唔 |
| 使用 | querying encoding parameters (sending end) |
| Return Value | Example:ATGE_MODE:0, RT:0,bitrate:4.0Mbps,gop:10,音頻:0,aes:0, 好呀！ |
| 备注 | Query command AES means the current encryption status: 0 disable; 1 使 |
Get Input Command
| 格式 | ATGI_ |
| 參數 | 唔 |
| 使用 | query the current camera input parameters (器) |
| Return Value | Example:ATGI_input_size: 1080P, input_rate: 60fps, sensor_type: 赫德米,好呀！ |
| 备注 | query command |
Set Input Command
| 格式 | ATSI$(input_size),$(input_rate)_ Example: 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 (器) |
| Return Value | Example: ATSI1080,25_ Input_size:1080P,input_rate: 25fps, 好呀！ |
| 言論 | 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)_ Example: ATSO720,30_ |
| 參數 | 1. 發射機: encoding output resolution output_size: 0 equal to input_size; >0 specify output size 2. 接收機: 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. 接收機: 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. 接收機: used to configure the resolution and frame rate of HDMI output |
| Return Value | Example: ATSO720,30_ output_size: 720P, output_rate: 30fps, 好呀！ |
| 言論 | 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输入)
| 格式 | ATSU$(vin),$(ain)_ Example: 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 (Example: HDMI/SDI input video, MIC input audio) |
| Return Value | Example: ATSU0,1_ ATSU0,1 OK |
| 备注 | setting command, power-off save. |
Get User Command
| 格式 | ATGU _ Example: ATGU_ |
| 參數 | 唔 |
| 使用 | To query user-specific configuration |
| Return Value | Example: ATGU_ ATGU0,1 OK |
| 备注 | query command return parameter description please refer to the ATSU command |
Set Receiver Command
| 格式 | ATSR嘅 $(頻率), $(bw ), $(llc), $(cvbs)_ Example: ATSR320000,6000,0,0_ |
| 參數 | 1. DR2C carrier frequency freq(千赫) 200000~860000(200MHz~860MHz, 1KHz步進。) 2. DR900 carrier center frequency freq(千赫) 200000~1600000(200MHz~1.6GHz, 1KHz步進。) 3. DR2C channel bandwidth bw(千赫) 2000~8000(2MHz~8MHz, 1KHz步進。) 4. DR900 channel bandwidth bw(千赫) 3200~8000(3.2MHz~8MHz, 1KHz步進。) 5. Enhanced data reliability option llc: 0 disable; 1 使 (it is required that the transmitter should also enable this option at the same time, and use it in pairs. Since more redundant data is added to enhance reliability, the video bit rate of the transmitter should be set to when this option is turned off half of) 6. AV output system cvbs: 0 pal; 1 ntsc |
| 使用 | To set the receiver parameter |
| Return Value | example: ATSR320000,6000,0,0_ ATSR320000,6000,0,0 OK |
| 备注 | setting command, save when power is off. |
Get Receiver Command
| 格式 | ATGR_ |
| 參數 | 唔 |
| ATGR_ | the receiving end parameter |
| Return Value | Example: ATGR_ ATGR320000,6000,0,aes:0,cvbs:0 好呀！ |
| 备注 | 1. Query command 2. Aes parameter indicates the current encryption status: 0 disable;1 使 3. CVBS parameter Indicates the current AV output standard: 0 pal;1 ntsc |
Get Bit Error Rate Command
| 格式 | ATGB_ |
| 參數 | 唔 |
| 使用 | querying the bit error rate and signal strength of the dual antennas at the receiving end |
| Return Value | Example: ATGB_ ATGB ber1:0.00% BER2:0.00% RSSI1 :54 RSSI2:53 Lock1:1 Lock2:1 好呀！ |
| 言論 | 1. Query commands 2. Ber1 and ber2 respectively indicate the bit error rate of each antenna, ranging from 0.0% 自 100.0% 3. RSSI1 and RSSI2 respectively indicate the signal strength of each antenna, ranging from 0 自 100 4. Lock1 and Lock2 respectively indicate the signal locking status of each antenna (1 Represents signal lock) |
Set Password Command
| 格式 | ATSP$(密碼), $(密碼)_ Example: ATSP123456, 123456_ |
| 參數 | AES key password: 6-digit password (ASCII) AES key password: 6-digit password (ASCII) (repeat it for confirmation) |
| 使用 | Used to set the AES key of the transceiver (發射機和接收器) |
| Return Value | Example: ATSP123456_ ATSP123456 OK |
| 备注 | 1. When the password is all 0, AES encryption is turned off. 2. Set the command and save it after powering it off. |
Set Data Transfer Command
| 格式 | ATST$(波特率), $( parity)_ Example: ATST115200,0_ |
| 參數 | 1. Baud rate baud rate: 1200、2400、4800、9600、19200、38400、57600、115200 2. Check Code: 0: 冇; 1: Odd; 2: Even |
| 使用 | Used to set the baud rate and parity bit of the serial port for data transparent transmission |
| Return Value | Example: ATST115200,0_ ATST115200,0 OK |
| 言論 | Set command |
Get Data Transfer Command
| 格式 | ATGT_ |
| 參數 | 唔 |
| 使用 | Used to query the baud rate and check code |
| Return Value | Example: ATGT_ ATGT115200,0 OK |
| 言論 | Query command |
Set IP Address Command
| 格式 | ATSIP$(ip), $(ip)_ Example: ATSIP192.168.1.215,192.168.1.215_ |
| 參數 | Local IP address Local IP address (repeat to confirm) |
| 使用 | Used to set the receiver IP address |
| Return Value | Example: ATSIP_192.168.1 .215,192.168.1.215_ ATSIP192.168.1.215 OK |
| 言論 | 1. After setting the IP address, the receiving end needs to be restarted to take effect. 2. Set the command and save it after powering it off. |
Get IP Address Command
| 格式 | ATGIP_ Example: ATGIP_ |
| 參數 | 唔 |
| 使用 | to query the current IP address of the receiving end |
| Return value | Example: ATGIP_ ATGIP192.168.0.215 OK |
| 备注 | query command |
OSD Overlay Protocol
| 格式 | ATOSD$(idx), $(X), $(和), $(str)_ Example:ATOSD0,40,20,height: 100m_ |
| 參數 | 1. IDX index: 0~7 (supports OSD overlay for 8 areas) 2. X-coordinate: 0~1919 3. Y coordinate: 0~1079 4. str: the string to be displayed at the corresponding coordinates (the space symbol is used to clear the display) |
| 使用 | on the video screen.OSD information |
| Return value | 唔 |
| 言論 | 1. The user specifies the x and y coordinates of the OSD display according to the maximum 1920×1080 点数, and the system will correct the coordinates according to the actual display situation. 2. The ‘_’ character cannot be contained in the str parameter |
Set Gain To Adjust
| 格式 | ATSAD$(頻率),$(adjust) _ Example:ATSAD700000,2.5_ |
| 參數 | wireless central working frequency： 頻率(千赫) 200000~2700000(200MHz~2.7GHz, step: 1千赫) Adjust the value(DB): ATSD cmd will subtract this value to set the wireless gain |
| 功能 | Specify and adjust the value for the wireless gain setting using by ATSD cmd |
| 反馈 | Example: ATSAD700000,2.5_ freq:700000,adjust:2.50 好呀！ |
| 評論 | Setting command is still valid when stopping power or resetting. |
Get Gain To Adjust
| 格式 | ATGAD[$(頻率)]_ Example: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 |
| 反馈 | Example: ATGAD700000_ freq:700000,adjust:2.50 OK ATGAD_ freq:700000 750000 好呀！ |
| 評論 | Inquiry command. |
Serial Port Utility software download
HTTPS://www.alithon.com/downloads
常见问题解答
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 這 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). 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 (比特拉特) 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.
By default, 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調製器解調器糢塊編碼器解碼器HDMI CVBS AV輸入AES 256 全高清射頻流
COFDM調製器解調器糢塊編碼器解碼器HDMI CVBS AV輸入AES 256 全高清射頻流
目錄
Another side view
COFDM Encoder module, CVBS / HDMI输入, IP output
For More details about the COFDM encoder board, please visit here
COFDM Encoder module Advantage:
- 超低延遲H.265/H.264音頻和視頻編碼，最大程度支持1080P@60實時視頻捕獲同編碼
- HDMI或AV音頻和視頻輸入, 編碼後, 以太網端口輸出或輸出到無線模塊, 視頻編碼比特率可以動態配置
- 支持音頻輸入和音頻解碼輸出
- 撐兩個視頻 (HDMI+AV) 同時輸入編碼 (選項, 默認值為HDMI或AV編碼, 從兩個輸入源中選擇一個). )
- 網頁界面 或者 serial port UART AT command for configuration management
COFDM transmitter module
COFDM modulator-demodulator datasheet download
The last version of the TX RX board
Tx: V6.5.6p版本
rx: 4.1.2P
常見問題
- 問題1: 你可唔可以話我呢個組件嘅零件號啊？, 我哋嘗試搵到本地並檢查. 答 1: 佢係一種名為LOH32PN2R2NNC嘅電感.
- 建議檢查點: 如果板子的電源電流良好但沒有射頻輸出, 或者係下面嘅組件 TC1-1-13MX+ 一般損壞.
- 為避免在運輸過程中損壞本設備 (the device itself is relatively high), we ordered red glue protection for this device when we shipped it.
- The engineer also suggests that you check to see if the cable is loose or in poor contact.
- Please try to replace the FPC cable connecting the two boards
- We can provide spare parts if you're sure which one.
3. 问题。, 如果我哋嘅相機質素對兩者都足夠好 4 mhz 同 8 mhz 帶寬. 在這種情況下, 如果客戶選擇 4 MHz 或 8 MHz?
答: 我哋嘅單程COFDM貨件默認使用4Mz無線帶寬, 對應視頻比特率為3.12Mbps, 對於1080p來說有足夠; 如果喺相同條件下更改為8MHz無線帶寬, 視頻比特率翻倍至6.24Mbps. 所有客戶都可以喺無線帶寬4MHz同8MHz之間進行選擇, 甚至6MHz都可以考慮.
4. 问题。: 從接收靈敏度视圖來看，邊個更適合此tx+rx集?
答: 用于無線連結, 可以簡單地認為，在較低的無線帶寬下，接收靈敏度會更高. 從接收靈敏度嘅角度來看, 4MHz>6MHz>8MHz
HDMI 1.4
單通道接收靈敏度:
-97+/-1dbm QPSK 8MHz緊嗰時,
-98+/-1dbm QPSK時為6MHZ,
使用雙天線接收時靈敏度提高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, 我哋都可以提供, then RTSP player doesn't support. （ RTSP同UDP只能由兩個固件中選擇一個）
請透過以下連結下載.
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
確定, 請檢查下圖.
如何透過UNT AT命令切換HDMI或CVBS視頻輸入?
如何升級COFDM視頻接收器
點樣升級COFDM冇人機視頻編碼器調製器板
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